CN116130707A - Fuel cell system control method, device and fuel cell system - Google Patents

Abstract

The application discloses a control method and device of a fuel cell system and the fuel cell system, and belongs to the technical field of fuel cells. A fuel cell system comprising a stack, an anode gas supply mechanism, an anode gas exhaust mechanism, and an anode gas circulation device, the method comprising: under the condition that the fuel cell system is determined to be in a starting stage, controlling an anode gas supply mechanism to input hydrogen to an anode gas inlet of a pile according to a first gas supply rate, controlling an anode gas exhaust mechanism to exhaust nitrogen at an anode gas outlet of the pile according to a first gas exhaust rate, and controlling an anode gas circulation device to control anode gas circulation of the pile according to a target gas circulation flow rate; and under the condition that the starting period is determined to be ended, controlling the anode gas supply mechanism to input hydrogen into the anode gas inlet of the electric pile according to the second gas supply rate, and controlling the anode gas exhaust mechanism to exhaust the nitrogen at the anode gas outlet of the electric pile according to the second gas exhaust rate. The method can avoid the membrane electrode from being corroded by high potential.

Description

Fuel cell system control method, device and 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 for 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 fast response.

When the fuel cell is not started, the battery is in an inert state where the gas at the anode and the cathode does not undergo electrochemical reactions. When the fuel cell is started, the battery is in an active state where the anode contains hydrogen and the cathode contains oxygen. From the inert state to the active state, it is necessary to Avoid the state where the battery cell voltage is too high, so as 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, usually in the start-up step, the gas in the anode and cathode is directly purged to control the start-up of the fuel cell from an inert state to an active state. The related technology uses a higher anode pressure to speed up the gas purge speed to reduce the unit voltage. The time in the high state, but the higher anode pressure may cause potential impact on the fuel cell stack, and also affect the performance and life of the fuel cell.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. To this end, the application proposes a fuel cell system control method, device, and fuel cell system, which can prevent the membrane electrodes of the fuel cell from being corroded by high potential during the start-up process of the fuel cell from an inert shutdown state to an active operation state, and improve Performance life of fuel cells.

In a first aspect, the present application provides a method for controlling a fuel cell system. The fuel cell system includes an electric 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 phase, the anode gas supply mechanism is controlled to input hydrogen into the anode gas inlet of the stack at the first gas supply rate, and the anode exhaust mechanism is controlled to input hydrogen at the first row The gas rate discharges the nitrogen gas 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, control the anode gas supply mechanism to input hydrogen into the anode gas inlet of the stack at the second gas supply rate, and control the anode exhaust mechanism to input hydrogen at the second exhaust rate Discharging 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 start-up process of the fuel cell from the idle shutdown state to the active operation state, the speed at which the anode is filled with hydrogen gas is reduced, the gas circulation amount of the anode of the stack is increased, and the anode of the stack is reduced. The difference in concentration of reactants in the overall flow field can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve the performance and life of the fuel cell.

According to an embodiment of the present application, the determining that the start-up phase ends includes:

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

In a case where it is determined that the current of the electric stack operating in the constant voltage output mode reaches a 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 V/single cell-0.85 V/single cell, and the target current threshold is 0.01 A/cm2-0.2 A/cm2.

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

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

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

The first control module is configured to control the anode gas supply mechanism to input hydrogen to the anode gas inlet of the stack at a first gas supply rate when it is determined that the fuel cell system is in the start-up phase, and control the anode The exhaust mechanism discharges the nitrogen gas 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;

The second control module is configured to control the anode gas supply mechanism to input hydrogen gas into the anode gas inlet of the stack at a second gas supply rate and control the anode gas exhaust when it is determined that the start-up phase is over The mechanism discharges the nitrogen gas 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 start-up process of the fuel cell from the idle shutdown state to the active operation state, the speed at which the anode is filled with hydrogen gas is reduced, the gas circulation amount of the anode of the stack is increased, and the anode of the stack is reduced. The difference in concentration of reactants in the overall flow field can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve the performance and life of the fuel cell.

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

Stack;

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 to 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 electric stack, and the anode exhaust mechanism is used to discharge nitrogen from the anode gas outlet of the electric 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 above, The anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device are controlled to work.

According to the fuel cell system of the present application, during the start-up process of the fuel cell from the inert shutdown state to the active operation state, the speed at which the anode is charged with hydrogen gas is reduced, the gas circulation amount of the anode of the stack is increased, and the overall flow field of the anode of the stack is reduced. The difference in concentration of reactants can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve 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 operable on the processor. When the processor executes the computer program, the following The control method of the fuel cell system described in the first aspect above.

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

In a sixth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, the method for controlling the fuel cell system as described in the first aspect above is realized.

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 drawings

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

Fig. 1 is one of the schematic flow charts of the control method of the fuel cell system provided by the embodiment of the present application;

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

Fig. 3 is the second schematic flow diagram of the control method of the fuel cell system provided by the embodiment of the present application;

Fig. 4 is a schematic structural diagram of a control device for a fuel cell system provided in 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:

Stack 210, hydrogen supplement valve 220, nitrogen exhaust valve 230, hydrogen circulation pump 240, steam-water separator 250, drain valve 251, check valve 260.

Detailed ways

The following will clearly describe the technical solutions in the embodiments of the present application with reference to the 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 them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are 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 through specific embodiments and application scenarios with reference to the accompanying drawings.

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

Such terminals include, but are not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (eg, touch screen displays and/or touch pads). It should also be appreciated that in some embodiments, the terminal may not be a portable communication device, but a desktop computer with a touch-sensitive surface (eg, a touchscreen display and/or a touchpad).

In each of the following embodiments, a terminal including a display and a touch-sensitive surface is described. It should be understood, however, that a terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

The control method of the fuel cell system provided in the embodiment of the present application, the execution subject of the control method of the fuel cell system may be an electronic device or a functional module or a functional entity in the electronic device that can realize the control method of the fuel cell system. The electronic devices mentioned in the examples include but are not limited to mobile phones, tablet computers, computers, cameras, and wearable devices, etc. The control method of the fuel cell system provided by the embodiment of the present application will be described below by taking the electronic devices as the execution subject as an example.

The fuel cell system provided in the embodiment of the present application includes an electric 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 to 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 supplement valve 220, the hydrogen supplement 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 exhaust valve 230, and the nitrogen exhaust valve 230 is opened , discharge the nitrogen gas from the anode gas outlet of the stack 210 .

The anode gas circulation device can be a hydrogen circulation pump 240, and 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, and the hydrogen circulation pump 240 can control the gas circulation of the anode end of the stack 210 .

The fuel cell system is in the start-up phase. The stack 210 of the fuel cell system starts from an inert state where the anode and cathode gases do not undergo electrochemical reactions to an active state where the anode contains hydrogen and the cathode contains oxygen.

It should be noted that, in the inert state, the gas in the anode and the cathode in the stack 210 can be a combination of hydrogen/nitrogen, nitrogen/nitrogen, nitrogen/air or air/air, and the process of the startup stage from the inert state to the active state In the process, the gas in the anode and cathode in the stack 210 is replaced by a combination of hydrogen/oxygen or hydrogen/air. During the start-up 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 in 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 start-up phase, control the anode gas supply mechanism to input hydrogen into the anode gas inlet of the stack 210 according to the first gas supply rate, and control the anode exhaust mechanism to discharge the hydrogen gas into the anode gas inlet 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 control device controls the anode gas circulation of the stack 210 according to the target gas circulation flow rate.

Wherein, the target gas circulation flow rate may be the maximum gas circulation flow rate allowed by the anode gas circulation device, and 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 rate and reduce the electric current. The overall hydrogen concentration difference in the anode flow field of the 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 at the second gas supply rate, and control the anode exhaust mechanism to pump the stack 210 at the second exhaust rate. 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 gas supply rate and the first gas supply rate used in the start-up phase are slower gas supply rates and gas supply rates than the second gas supply rate and the second exhaust rate used in the normal operation phase after the start-up phase. gas rate.

In this embodiment, in the start-up 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 discharge the anode gas of the stack 210 according to the first exhaust rate. The nitrogen gas at the outlet is discharged, the speed at which the anode of the stack 210 is charged with hydrogen is reduced, 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, and the anode gas circulation amount of the stack 210 is increased, so that the anode of the stack 210 The overall hydrogen concentration difference in the flow field is minimized, and the synchronous increase of the overall hydrogen concentration in the anode flow field of the cell stack 210 is realized.

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

In the related art, a higher anode pressure is used to speed up the gas purging speed, so as to shorten the time of the cell voltage being too high, but a higher anode pressure will cause a drastic change in the concentration of the reactant, causing damage to the fuel cell stack 210. The impact of potential impact affects the performance and life of fuel cells.

In the embodiment of the present application, a milder active gas replacement method is adopted, and the slower first gas supply rate and the first gas supply rate are used to control the inflation during the start-up phase, reducing the rate at which the anode of the stack 210 is charged with hydrogen, Use the target gas circulation flow rate for gas circulation control, increase the anode gas circulation of the stack 210, so that the overall reactant concentration difference in the anode flow field of the stack 210 is minimized, the overall potential difference is small, and the potential in the active area can be effectively avoided 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 start-up process of the fuel cell from the idle shutdown state to the active operation state, the speed at which the anode is charged with hydrogen gas is reduced, and the anode gas circulation amount of the stack 210 is increased to reduce the The overall reactant concentration difference in the anode flow field of the small stack 210 can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve the performance and life of the fuel cell.

In some embodiments, step 120, determining that the start-up phase ends, 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;

In a case where it is determined that the current of the electric 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, during the start-up process of the electric stack 210 of the fuel cell system from the inert state to the active state, the voltage of the electric stack 210 is gradually increased, and when it is determined that the voltage of the electric stack 210 reaches the target voltage threshold, the electric stack 210 is controlled according to In the constant voltage output mode, the voltage of the electric stack 210 is constant.

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

In actual execution, it is determined that the start-up phase is over and enters the operation phase. The anode gas supply mechanism of the fuel cell system supplies hydrogen to the anode gas inlet of the stack 210 according to the second gas supply rate, and the anode exhaust mechanism supplies hydrogen according to the second exhaust rate. The nitrogen gas from the anode gas outlet of the stack 210 is exhausted.

The second gas supply rate and the second gas supply rate used in the running phase are faster gas supply rates and gas supply rates than the first gas supply rate and the first gas supply rate used in the start-up phase, which can effectively The reaction rate of the stack 210 is increased.

A specific embodiment is introduced below.

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

Control the hydrogen circulation pump 240 of the fuel cell system to run at the maximum speed, and increase the anode gas circulation volume of the stack 210 .

Control the hydrogen replenishing valve 220 to supply hydrogen to the anode of the stack 210 according to the first gas supply rate, the hydrogen replenishing valve 220 replenishes hydrogen in a small amount, and control the nitrogen exhaust valve 230 to discharge the gas from the anode of the stack 210 according to the first exhaust rate. Nitrogen valve 230 is exhausted in a small amount to reduce the rate at which the anode is charged with hydrogen.

When it is determined that the voltage reaches the threshold, control the electric stack 210 to operate in the constant voltage output mode; Exclude, control the hydrogen replenishment valve 220 to supply hydrogen to the anode of the stack 210 according to the second gas supply rate, the nitrogen exhaust valve 230 normally discharges nitrogen, the hydrogen replenishment valve 220 replenishes hydrogen normally, the start-up phase is completed, and the fuel cell system operates normally.

In this embodiment, the speed at which the anode is filled with hydrogen gas is reduced during the start-up phase, the anode gas circulation volume of the stack 210 is increased, and the difference in concentration of reactants in the overall anode flow field of the stack 210 is reduced, effectively preventing the membrane electrode of the fuel cell from being subjected to high pressure. Potential corrosion improves the performance and life of the fuel cell, adjusts the rate at which the anode is charged with hydrogen during the operation phase, and increases the reaction rate of the stack 210.

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

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

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

For example, the target current threshold may be 0.05 ampere per square centimeter (A/cm ² ), the electric stack 210 operates in a constant voltage output mode, the current of the electric stack 210 gradually increases to 0.05A/cm ² , and it is determined that the start-up phase is over.

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

In this embodiment, the first gas supply rate is used for trace hydrogen replenishment in the start-up stage, and the second gas supply rate is used for normal hydrogen replenishment in the normal stage, and the trace hydrogen replenishment rate is 2%-20% of the normal hydrogen replenishment rate, Ensure that the anode is filled with hydrogen at a relatively slow speed during the start-up phase, and reduce the concentration difference of reactants in the anode flow field of the stack 210 as a whole.

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 start-up phase to perform trace nitrogen exhaust, and the second exhaust rate is used in the normal phase to perform normal nitrogen exhaust, and the trace nitrogen exhaust rate is 2%-20% of the normal nitrogen exhaust rate. Ensure that the anode nitrogen discharge speed is relatively slow during the start-up phase, and reduce the concentration difference of reactants in the anode flow field of the stack 210 as a whole.

The control method of the fuel cell system provided in the embodiment of the present application may be executed by a control device of the fuel cell system. In the embodiment of the present application, the control device of the fuel cell system provided in the embodiment of the present application is described by taking the control device of the fuel cell system executing the control method of the fuel cell system as an example.

The embodiment of the present application also provides a control device for a fuel cell system, and the fuel cell system includes an electric 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 into the anode gas inlet of the stack 210 according to the first gas supply rate, and control the anode exhaust mechanism to input hydrogen according to the first The exhaust rate discharges the nitrogen gas 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 into the anode gas inlet of the stack 210 according to the second gas supply rate when it is determined that the start-up phase is over, and control the anode exhaust mechanism to input hydrogen into the anode gas inlet of the stack 210 according to the second exhaust rate. The nitrogen gas at the anode gas outlet of the electric stack 210 is discharged at a high speed;

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 start-up process of the fuel cell from the idle shutdown state to the active operation state, the speed of filling the anode with hydrogen gas is reduced, and the anode gas circulation of the stack 210 is increased to reduce the The overall reactant concentration difference in the anode flow field of the small stack 210 can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve the performance life of the fuel cell.

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

In a case where it is determined that the current of the electric 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/cell to 0.85 volts/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 gas supply rate to the second gas 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. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) ) equipment, robots, wearable devices, ultra-mobile personal computer (ultra-mobilepersonal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc. ), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., are not specifically limited in this embodiment of the present application.

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 this embodiment of the present application.

The control device of the fuel cell system provided in the embodiment of the present application can realize various processes realized by the method embodiment in FIG. 1 or FIG. 3 , and details are not repeated here to avoid repetition.

An embodiment of the present application provides a fuel cell system, including: an electric 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 electric stack 210 , and the anode gas supply mechanism is used to input hydrogen gas to the anode gas inlet of the electric stack 210 .

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

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

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

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

The anode gas circulation device can be a hydrogen circulation pump 240, and 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, and the hydrogen circulation pump 240 can control the gas circulation of the anode end of the stack 210 .

A specific embodiment is introduced below.

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

Control the hydrogen circulation pump 240 of the fuel cell system to run at the maximum speed, and increase the anode gas circulation volume of the stack 210 .

Control the hydrogen replenishing valve 220 to supply hydrogen to the anode of the stack 210 according to the first gas supply rate, the hydrogen replenishing valve 220 replenishes hydrogen in a small amount, and control the nitrogen exhaust valve 230 to discharge the gas from the anode of the stack 210 according to the first exhaust rate. Nitrogen valve 230 is exhausted in a small amount to reduce the rate at which the anode is charged with hydrogen.

When it is determined that the voltage reaches the threshold, control the electric stack 210 to operate in the constant voltage output mode; Exclude, control the hydrogen replenishment valve 220 to supply hydrogen to the anode of the stack 210 according to the second gas supply rate, the nitrogen exhaust valve 230 normally discharges nitrogen, the hydrogen replenishment valve 220 replenishes hydrogen normally, the start-up 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 start-up process of the fuel cell from the idle shutdown state to the active operation state, the speed at which the anode is filled with hydrogen gas is reduced, the anode gas circulation of the stack 210 is increased, and the stack is reduced. The difference in concentration of reactants in the overall anode flow field of 210 can effectively prevent the membrane electrode of the fuel cell from being corroded by high potential and improve 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, and the steam-water separator 250 The second output end of the one-way valve 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, and 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 electric stack 210 .

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

In this embodiment, the hydrogen gas passes through the hydrogen supply valve 220 and the hydrogen circulation pump 240 in sequence, and then enters the anode gas inlet of the stack 210. 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 exhaust valve 230 .

In some embodiments, as shown in FIG. 5 , the embodiment of the present application also provides an electronic device 500, including a processor 501, a memory 502, and a computer program stored in the memory 502 and operable on the processor 501. When the program is executed by the processor 501, various processes of the above fuel cell system control method embodiment can be realized, and the same technical effect can be achieved, so in order to avoid repetition, details are not repeated 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.

The embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned embodiment of the control method for the fuel cell system is realized Each process, and can achieve the same technical effect, in order to avoid repetition, will not repeat them here.

Wherein, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

An embodiment of the present application further provides a computer program product, including a computer program, and when the computer program is executed by a processor, the above fuel cell system control method is realized.

Wherein, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The 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, and the processor is used to run programs or instructions to implement the above fuel cell system control method The various processes of the embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

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

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising 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, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , optical disc), including several instructions to enable a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation manners, and the above-mentioned specific implementation manners are only illustrative, rather than restrictive. people

Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, the staff can also make many forms, all of which belong to the protection of this application.

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

The description of "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with this embodiment or example are included in at least one embodiment or example of the present application. In this specification, for the above

Schematic representations of terms are not necessarily referring 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 embodiment of the present application has been shown and described, those of ordinary skill in the art will understand that:

Various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and purpose of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims (11)

1. A control method of a fuel cell system, characterized in that the fuel cell system includes a stack, an anode gas supply mechanism, an anode gas exhaust mechanism, and an anode gas circulation device, the method comprising:

controlling the anode gas supply mechanism to input hydrogen to an anode gas inlet of the electric pile according to a first gas supply rate, controlling the anode gas exhaust mechanism to exhaust nitrogen at an anode gas outlet of the electric pile according to a first gas exhaust rate, and controlling the anode gas circulation device to control anode gas circulation of the electric pile according to a target gas circulation flow rate under the condition that the fuel cell system is determined to be in a starting stage;

under the condition that the starting stage is determined to be finished, controlling the anode gas supply mechanism to input hydrogen into an anode gas inlet of the electric pile according to a second gas supply rate, and controlling the anode gas exhaust mechanism to exhaust nitrogen at an anode gas outlet of the electric pile according to a second gas exhaust rate;

wherein the first air supply rate is less than the second air supply rate and the first air discharge rate is less than the second air discharge rate.

2. The control method of the fuel cell system according to claim 1, characterized in that the determining that the start-up phase is ended includes:

under the condition that the voltage of the electric pile reaches a target voltage threshold value, controlling the electric pile to operate according to a constant voltage output mode;

and determining that the starting stage is finished under the condition that the current of the electric pile operating in the constant voltage output mode reaches a target current threshold value.

3. The control method of the fuel cell system according to claim 2, wherein the target voltage threshold is 0.82 v/cell-0.85 v/cell, and the target current threshold is 0.01 amp/cm-0.2 amp/cm.

4. A control method of a fuel cell system according to any one of claims 1 to 3, wherein a ratio of the first air supply rate and the second air supply rate is 2% to 20%.

5. A control method of a fuel cell system according to any one of claims 1 to 3, wherein a ratio of the first exhaust rate and the second exhaust rate is 2% to 20%.

6. A control apparatus for a fuel cell system, wherein the fuel cell system includes a stack, an anode gas supply mechanism, an anode gas exhaust mechanism, and an anode gas circulation device, the apparatus comprising:

a first control module for controlling the anode gas supply mechanism to input hydrogen to the anode gas inlet of the electric pile according to a first gas supply rate, controlling the anode gas exhaust mechanism to exhaust nitrogen from the anode gas outlet of the electric pile according to a first gas exhaust rate, and controlling the anode gas circulation device to control the anode gas circulation of the electric pile according to a target gas circulation flow rate, in the case that the fuel cell system is determined to be in a start-up stage;

the second control module is used for controlling the anode gas supply mechanism to input hydrogen into the anode gas inlet of the electric pile according to a second gas supply rate and controlling the anode gas exhaust mechanism to exhaust the nitrogen at the anode gas outlet of the electric pile according to a second gas exhaust rate under the condition that the starting stage is determined to be finished;

wherein the first air supply rate is less than the second air supply rate and the first air discharge rate is less than the second air discharge rate.

7. A fuel cell system, characterized by comprising:

a galvanic pile;

the anode gas supply mechanism is connected with an anode gas inlet of the electric pile and is used for inputting hydrogen into the anode gas inlet of the electric pile;

an anode exhaust mechanism connected to the anode gas outlet of the stack, the anode exhaust mechanism being configured to exhaust nitrogen from the anode gas outlet of the stack;

the anode gas circulation device is connected with an anode gas inlet of the electric pile and is used for controlling the anode gas circulation of the electric pile;

a controller electrically connected to the anode gas supply mechanism, the anode exhaust mechanism, and the anode gas circulation device, the controller being configured to control operations of the anode gas supply mechanism, the anode exhaust mechanism, and the anode gas circulation device based on the control method of the fuel cell system according to any one of claims 1 to 5.

8. The fuel cell system according to claim 7, characterized by further comprising: the steam-water separator is provided with a drain valve, an anode gas outlet of the electric pile is connected with an input end of the steam-water separator, a first output end of the steam-water separator is connected with an input end of the anode gas exhaust mechanism, a second output end of the steam-water separator is connected with an input end of the one-way valve, an output end of the one-way valve is connected with a first input end of the anode gas circulation device, the anode gas supply mechanism is connected with a second input end of the anode gas circulation device, and an output end of the anode gas circulation device is connected with an anode gas inlet of the electric pile.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the control method of the fuel cell system of any one of claims 1-5 when the program is executed by the processor.

10. A non-transitory computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the control method of the fuel cell system according to any one of claims 1 to 5.

11. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements a method of controlling a fuel cell system according to any one of claims 1-5.

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