Fuel cell system starting system and method

Abstract

The present application relates to the field of fuel cell technology, and in particular to a starting system for a fuel cell system, comprising a fuel cell stack and a hydrogen system connected to the fuel cell stack; the hydrogen system comprising a hydrogen inlet pressure sensor, a hydrogen outlet concentration sensor, a gas-liquid separator, and a hydrogen return pump; the fuel cell stack, the hydrogen outlet concentration sensor, the gas-liquid separator, the hydrogen return pump, and the hydrogen inlet pressure sensor are sequentially connected to form a loop; a proportional valve is provided at the inlet of the hydrogen inlet pressure sensor for controlling the amount of hydrogen entering; a drain valve is provided at the outlet of the gas-liquid separator for controlling the amount of hydrogen and water discharged to control the hydrogen concentration of the hydrogen system. The present application shortens the starting time of a fuel cell to one-third of the starting time of an existing fuel cell system.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a starting system and method for a fuel cell system. Background Art

[0002] The existing fuel cell system startup process includes hydrogen pressure buildup, air pressure buildup, cooling system startup, boost DC / DC startup, etc. The required startup time is about 6 seconds, which is three times the 2 seconds of the traditional engine start time, seriously affecting customers' driving experience of fuel cell vehicles.

[0003] In order to shorten the start-up time of the fuel cell, the existing technology generally adopts a method of starting the system at a high voltage and a method of controlling the operating sequence of the fuel cell system. However, the method of starting the system at a high voltage shortens the life of the fuel cell; and the method of controlling the operating sequence of the fuel cell system is too complicated and difficult to implement. Summary of the Invention

[0004] In order to solve the problem of long startup time of existing fuel cell systems through a simple and easy method,

[0005] In a first aspect, the present application provides a starting system for a fuel cell system, the starting system comprising a fuel cell stack (100) and a hydrogen system (201) connected to the fuel cell stack (100);

[0006] The hydrogen system (201) includes a hydrogen inlet pressure sensor (21), a hydrogen outlet concentration sensor (22), a gas-liquid separator (23), and a hydrogen return pump (24);

[0007] The fuel cell stack (100), the hydrogen outflow concentration sensor (22), the gas-liquid separator (23), the hydrogen return pump (24), and the hydrogen inflow pressure sensor (21) are sequentially connected to form a loop;

[0008] The inlet of the hydrogen inlet pressure sensor (21) is provided with a proportional valve (20) for controlling the amount of hydrogen entering; the outlet of the gas-liquid separator (23) is provided with a drain valve (25) for controlling the amount of hydrogen and water discharged, so as to control the hydrogen concentration of the hydrogen system (201).

[0009] Furthermore, the starting system further comprises an air system (101) connected to the fuel cell stack (100), wherein the air system (101) comprises an inlet pipe and an outlet pipe, an air data monitoring device for monitoring air data, and an air data control device for controlling air data;

[0010] The starting system sets the stack current of the stack (100) according to the air data.

[0011] Furthermore, the air concentration monitoring device includes:

[0012] an air flow meter (10) provided at the inlet of the inlet pipe, for monitoring the air flow entering the air system (101);

[0013] An air outflow oxygen concentration sensor (14) disposed between the outlet pipeline and the fuel cell stack (100) for monitoring the concentration of air discharged from the air system (101);

[0014] An air inlet temperature and pressure sensor (13) disposed between the inlet pipeline and the fuel cell stack is used to monitor the temperature and pressure of air discharged from the air system (101).

[0015] Furthermore, the air data control device includes:

[0016] an air compressor (12) disposed between the air inlet temperature and pressure sensor (13) and the air flow meter (10), and a back pressure valve (16) disposed at the outlet of the outlet pipeline;

[0017] The air data control device comprises a plurality of three-way valves arranged between the inlet pipeline and the outlet pipeline, and is used to control the flow state of the air in the air system (101).

[0018] Furthermore, the air data control device includes a plurality of three-way valves arranged between the inlet pipeline and the outlet pipeline, for controlling the flow state of air in the air system (101), including: a first three-way valve (11) arranged between the first inlet pipeline (111) and the second inlet pipeline (112); a second three-way valve (15) arranged between the first outlet pipeline (151) and the second outlet pipeline (152); and a third outlet pipeline (153) arranged between the first three-way valve (11) and the second three-way valve (15);

[0019] When the first three-way valve (11) and the second three-way valve (15) are fully opened, the air system (101) is controlled to form an open air circulation loop; when the first three-way valve (11) and the second three-way valve (15) are fully closed, the air system (101) is controlled to form a closed air circulation loop, so as to control the flow direction and air concentration of the air in the air system (101).

[0020] Furthermore, the starting system further includes a controller (200) connected to the battery stack (100) via a power supply (300), for controlling the start-up time of the power supply (300) to reduce the starting time of the starting system.

[0021] Furthermore, the fuel cell stack (100) is also connected to a cooling system (301) for controlling the operating temperature of the fuel cell stack to be within a safe range.

[0022] In a second aspect, the present application provides a method for starting a fuel cell system, comprising the following steps:

[0023] Turning on the cooling system (101) and the hydrogen system (201) to make the hydrogen pressure entering the stack reach the target value;

[0024] Determining whether the stack hydrogen concentration is greater than a preset first threshold value N1, and when the determination result is yes, opening the air system (101), setting the first three-way valve (11) and the second three-way valve (15) to be fully open, so that the stack air pressure reaches the target value;

[0025] Determining whether the stack air concentration is greater than a preset second threshold value A1, and when the determination result is yes, turning on the power supply and controlling the stack current of the stack (100) to increase to a preset first current value S1;

[0026] Determining whether a single-chip voltage value of the battery stack (100) is less than a preset first voltage value V1, and when the determination result is yes, controlling the battery stack current of the battery stack (100) to increase to a preset second current value S2;

[0027] The first three-way valve (11) and the second three-way valve (15) are set to be fully closed, and the air compressor is set to intermittently operate at the lowest speed; whether the hydrogen pressure is within a set range is judged, and when the judgment result is yes, the power supply (300) is shut down, and the stack current of the stack (100) is controlled to drop to a preset third current value S3;

[0028] It is determined whether the single-chip voltage value of the battery stack (100) is less than a preset second voltage value V2; if the determination result is yes, the air system (101), the hydrogen system (201), and the cooling system (301) are shut down.

[0029] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method steps described in any one of the second aspects are implemented.

[0030] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the method steps described in the second aspect.

[0031] Beneficial effects:

[0032] The present application provides a starting system for a fuel cell system, the starting system comprising a fuel cell stack (100) and a hydrogen system (201) connected to the fuel cell stack (100); the hydrogen system (201) comprising a hydrogen inlet pressure sensor (21), a hydrogen outlet concentration sensor (22), a gas-liquid separator (23), and a hydrogen return pump (24); the fuel cell stack (100), the hydrogen outlet concentration sensor (22), the gas-liquid separator (23), the hydrogen return pump (24), and the hydrogen inlet pressure sensor (21) are sequentially connected to form a loop; a proportional valve (20) is provided at the inlet of the hydrogen inlet pressure sensor (21) for controlling the amount of hydrogen entering the stack; a drain valve (25) is provided at the outlet of the gas-liquid separator (23) for controlling the amount of hydrogen and water discharged, so as to control the hydrogen concentration of the hydrogen system (201). The present application uses a hydrogen concentration sensor (22) to monitor the hydrogen concentration in real time and maintain a relatively high hydrogen concentration out of the stack when the starting system is shut down. When the starting system is started next time, since the hydrogen concentration in the hydrogen circuit is relatively high, the hydrogen concentration requirement at the time of starting is met, and there is no need to build up hydrogen pressure again, thus saving the time for building up hydrogen pressure and shortening the starting time of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a schematic diagram of the starting system structure provided in Example 1 of the present application;

[0035] Figure 2 This is a schematic flow chart of the first-stage method provided in Example 2 of the present application;

[0036] Figure 3 This is a schematic flow chart of the second-stage method provided in Example 2 of the present application;

[0037] Figure 4 This is a schematic diagram of the electronic structure equipment in Example 3 of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0039] Fuel cells convert the Gibbs free energy component of a fuel's chemical energy into electricity through an electrochemical reaction. They are not limited by the Carnot cycle, resulting in high thermal efficiency. A fuel cell system for an automobile typically includes an air system, a hydrogen system, and a cooling system. Hydrogen is used as the fuel. Hydrogen and air are introduced into the anode and cathode of the fuel cell, respectively, where chemical reactions generate electricity. Currently, proton exchange membrane fuel cells are the most widely used in the automotive sector. The hydrogen and air required for the fuel cell reaction are conducted through the anode and cathode flow fields of the bipolar plates, respectively, into the gas diffusion layer. The gas then passes through the diffusion layer into the catalyst layer. Hydrogen is adsorbed by the anode catalyst particles and dissociates into protons and electrons. Protons, in the form of hydrated protons, pass through the proton exchange membrane and reach the cathode catalyst layer. Electrons cannot pass through the proton exchange membrane and must reach the cathode from an external electronic load. In the cathode catalyst layer, oxygen atoms, protons, and electrons react electrochemically over the catalyst to produce water.

[0040] Example 1

[0041] In order to solve the problem of long start-up time of existing fuel cell systems by a simple and easy method without shortening the life of the fuel cell, the present invention provides a fuel cell start-up system, combined with the attached Figure 1 The fuel cell starting system includes: a power supply DC / DC 300, a controller FCCU 200, a fuel cell stack 100, an air system 101, a hydrogen system 201 and a cooling system 301;

[0042] The controller FCCU200 is connected to the positive and negative poles of the fuel cell stack 100 through the power supply DC / DC300. A voltage sensor and a current sensor are installed at the outlet of the fuel cell stack 100 to detect the average voltage, minimum voltage and current of the fuel cell stack.

[0043] The controller FCCU200 mainly detects the signals of various actuators and sensors, such as the speed of the air compressor 12, the opening of the back pressure valve, voltage, current, etc., and effectively controls them.

[0044] The cooling system 301 is connected to the positive and negative electrodes of the fuel cell stack 100 and is used to control the operating temperature of the fuel cell stack 100 to be within a safe range.

[0045] The air system 101 is connected to the positive and negative electrodes of the fuel cell stack 100;

[0046] The air system 101 includes an inlet pipe and an outlet pipe, an air data monitoring device for monitoring air data, and an air data control device for controlling air data;

[0047] Air concentration monitoring devices include:

[0048] An air flow meter 10 provided at the inlet of the inlet pipe, for monitoring the air flow entering the air system 101;

[0049] An air outflow oxygen concentration sensor 14 provided between the outlet pipe and the fuel cell stack 100 is used to monitor the concentration of air discharged from the air system 101;

[0050] An air inlet temperature and pressure sensor 13 provided between the inlet pipe and the fuel cell stack is used to monitor the temperature and pressure of the air discharged from the air system 101;

[0051] The starting system sets the stack current of the stack 100 according to the air data;

[0052] Air Data Control Unit includes,

[0053] an air compressor 12 disposed between the air inlet stack temperature and pressure sensor 13 and the air flow meter 10, and a back pressure valve 16 disposed at the outlet of the outlet pipe;

[0054] The air data control device comprises a first three-way valve 11 disposed between a first inlet pipeline 111 and a second inlet pipeline 112, a second three-way valve (15) disposed between a first outlet pipeline (151) and a second outlet pipeline (152), and a third outlet pipeline (153) disposed between the first three-way valve (11) and the second three-way valve (15);

[0055] When the first three-way valve 11 and the second three-way valve 15 are fully open, the first inlet pipeline 111 is only connected to the second inlet pipeline 112, and the first outlet pipeline 151 is only connected to the second outlet pipeline 152. At this time, the air flow direction of the air system is: air flow meter 10, first inlet pipeline 111, first three-way valve 11, second inlet pipeline 112, air compressor 12, air inlet temperature and pressure sensor 13, fuel cell stack 100, air outlet oxygen concentration sensor 14, first outlet pipeline 151, second three-way valve 15, second outlet pipeline 152, back pressure valve 16, forming an open cycle;

[0056] When the first three-way valve 11 and the second three-way valve 15 are fully closed, the second inlet pipeline 112 is connected only to the third outlet pipeline 153, and the first outlet pipeline 151 is connected only to the third outlet pipeline 153. At this time, the air flow direction of the air system is: first three-way valve 11, second inlet pipeline 112, air compressor 12, air inlet temperature and pressure sensor 13, fuel cell stack 100, air outlet oxygen concentration sensor 14, first outlet pipeline 151, second three-way valve 15, and third outlet pipeline 153, forming a closed loop.

[0057] The hydrogen system 201 is connected to the positive and negative electrodes of the fuel cell stack 100;

[0058] Hydrogen inlet pressure sensor 21, hydrogen outlet concentration sensor 22, gas-liquid separator 23, hydrogen return pump 24;

[0059] The fuel cell stack 100, the hydrogen outflow concentration sensor 22, the gas-liquid separator 23, the hydrogen return pump 24, and the hydrogen inflow pressure sensor 21 are sequentially connected to form a loop;

[0060] A proportional valve 20 is provided at the inlet of the hydrogen inlet pressure sensor 21 for controlling the amount of hydrogen entering the stack; a drain valve 25 is provided at the outlet of the gas-liquid separator 23 for controlling the amount of hydrogen and water discharged. When the drain valve 25 is opened, liquid water and hydrogen at the outlet of the gas-liquid separator are discharged through the drain valve 25, thereby controlling the hydrogen concentration of the hydrogen system 201.

[0061] This application uses the hydrogen concentration sensor 22 to monitor the hydrogen concentration in real time and maintain a high hydrogen concentration out of the stack when the starting system is shut down. When the starting system is started next time, since the hydrogen concentration in the hydrogen circuit is high, the hydrogen concentration requirement at startup is met, and there is no need to re-build hydrogen pressure, which saves the time for hydrogen pressure building, thereby shortening the starting time of the short fuel cell from 6s to 2s, improving user experience.

[0062] Example 2

[0063] When the fuel cell system is started, it is divided into the following two stages. The first stage is the start-up of the cooling system and the simultaneous establishment of pressure in the air and hydrogen systems. The second stage is the current loading to the idle current to complete the entire starting process.

[0064] Based on the same inventive concept, embodiment 2 provides a method for starting a fuel cell system.

[0065] Combined with attachment Figure 2 The first stage of fuel cell system startup is the cooling system startup, which simultaneously carries out the pressure building process of the air and hydrogen systems.

[0066] The following steps are involved:

[0067] Step 1: start the cooling system (101) and the hydrogen system (201) to make the hydrogen pressure entering the stack reach the target value;

[0068] Step 2, determining whether the stack hydrogen concentration is greater than a preset first threshold value N1, and if the determination result is yes, opening the air system (101), setting the first three-way valve (11) and the second three-way valve (15) to be fully open, so that the stack air pressure reaches the target value;

[0069] Step 3, judging whether the stack air concentration is greater than a preset second threshold value A1, and when the judgment result is yes, turning on the power supply and controlling the stack current of the stack (100) to increase to a preset first current value S1;

[0070] Step 4, judging whether the single-chip voltage value of the battery stack (100) is less than a preset first voltage value V1, and when the judgment result is yes, controlling the battery stack current of the battery stack (100) to increase to a preset second current value S2;

[0071] Combined with attachment Figure 3 The second stage of fuel cell system startup is to load the current to the idle current to complete the entire startup process.

[0072] Step 5: setting the first three-way valve (11) and the second three-way valve (15) to be fully closed, and setting the air compressor to intermittently operate at the lowest speed; judging whether the hydrogen pressure is within the set range, and if the judgment result is yes, shutting down the power supply (300) and controlling the stack current of the stack (100) to drop to a preset third current value S3;

[0073] Step 6, judging whether the single-chip voltage value of the fuel cell stack (100) is less than a preset second voltage value V2, and when the judgment result is yes, shutting down the air system (101), the hydrogen system (201), and the cooling system (301).

[0074] The following is a detailed description of the specific implementation process:

[0075] Phase 1: Upon receiving a start command, the fuel cell system controller simultaneously activates the cooling and hydrogen systems, begins building hydrogen pressure, and closes the DC / DC input relay. It then determines whether the stack hydrogen concentration is greater than N1, for example, 70%. If the hydrogen concentration is greater than N1, the air system is activated. If the hydrogen concentration is less than N1, the controller waits for a certain period of time until the hydrogen concentration exceeds N1 before activating the air system. The system then builds air pressure and monitors the oxygen concentration of the air leaving the stack. When the oxygen concentration is greater than A1, for example, 10%, the DC / DC startup command is issued, and a small stack current, S1, such as 1A, is set to keep the stack voltage below the high-voltage voltage, V1, for example, 0.85V.

[0076] The second stage: When the oxygen concentration of the air leaving the stack is greater than A2, such as 15%, the DCDC sets the idle stack current S2, such as 26A. When the stack current is pulled to the idle current S2, the start-up is completed.

[0077] During the startup process described above, when the hydrogen system is turned on, the proportional valve opening and the hydrogen return pump speed are adjusted to quickly bring the hydrogen pressure entering the reactor to the target value, such as 150 kPa, completing the hydrogen pressure buildup process. At this point, the drain valve is closed. When the air system is turned on, the first and second three-way valves are fully opened, and the air compressor speed and back-pressure valve opening are adjusted to quickly bring the air pressure entering the reactor to the target value, such as 110 kPa. Only after the air pressure buildup is complete can the hydrogen system drain valve be opened for periodic drainage.

[0078] In order to achieve a quick start, the previous shutdown process needs to be strictly controlled. After the fuel cell system is shut down and purged, the first and second three-way valves of the air system are closed, and the air compressor runs intermittently at the lowest speed. The hydrogen system inlet pressure is controlled within a certain range, such as 150kPa-200kPa, and the hydrogen exhaust valve is closed at the same time. The power supply DCDC sets the discharge current S3, such as 20A, to perform shutdown discharge and observe the voltage of the single chip of the stack. When the single chip voltage is lower than V2, such as 0.2V, and the oxygen concentration of the air leaving the stack is lower than 1%, the oxygen in the air circuit is basically consumed. At this time, most of the gas in the air circuit is nitrogen, while the hydrogen circuit is mostly hydrogen and a small amount of nitrogen, and the hydrogen concentration is generally greater than 90%. Finally, stop the air compressor and shut down the hydrogen system and cooling system.

[0079] The fuel cell air system uses the first three-way valve and the second three-way valve to form an air closed loop when the system is shut down. The intermittent operation of the air compressor can fully consume oxygen to form nitrogen protective gas, thereby protecting the life of the fuel cell.

[0080] The fuel cell hydrogen system uses a hydrogen outflow concentration sensor to monitor the hydrogen concentration in real time during shutdown and maintain a high hydrogen outflow concentration. During the next startup, the higher hydrogen concentration in the hydrogen circuit meets the hydrogen concentration requirement during startup, saving time for hydrogen pressure buildup.

[0081] At the next start, the DC / DC input side relay of the power supply is closed in advance, which saves the startup time of the DC / DC power supply.

[0082] Compared with traditional fuel cell system starting strategies, this technical solution reduces the hydrogen pressure building process at the next start-up by increasing the hydrogen concentration in the hydrogen circuit during shutdown, significantly shortening the starting time of the fuel cell system, while avoiding the generation of high potential and extending the service life of the fuel cell stack.

[0083] Example 3

[0084] Based on the same inventive concept, embodiment 3 of the present application provides an electronic device, as shown in the attached Figure 4 As shown, it includes a memory 304, a processor 302 and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, the steps of the above-mentioned method for starting a fuel cell system are implemented.

[0085] Among them, Figure 4In the embodiment of the present invention, a bus architecture (represented by bus 500) is shown. Bus 500 may include any number of interconnected buses and bridges, and bus 500 links together various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 500 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 500 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same component, namely a transceiver, which provides a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 500 and general processing, while memory 304 may be used to store data used by processor 302 when performing operations.

[0086] Example 4

[0087] Based on the same inventive concept, embodiment 4 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the program implements the steps of the above-mentioned method for starting a fuel cell system.

[0088] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general-purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing this type of system. In addition, the present invention is not directed to any specific programming language. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the above description of specific languages ​​is for the purpose of disclosing the best mode of the present invention.

[0089] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0090] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0091] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed herein may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0092] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0093] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components of the thermal simulation device for an aluminum substrate or an electronic device according to an embodiment of the present invention. The present invention can also be implemented as a device or device program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0094] The above is only an embodiment of the present application. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of this application, several variations and improvements can be made, which should also be regarded as the scope of protection of this application. These will not affect the effect of the implementation of this application and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for starting a fuel cell system, characterized in that: The following steps are included: Turning on the cooling system (301) and the hydrogen system (201) to make the hydrogen pressure entering the stack reach the target value; Determining whether the stack hydrogen concentration is greater than a preset first threshold value N1, and when the determination result is yes, opening the air system (101), setting the first three-way valve (11) and the second three-way valve (15) to be fully open, so that the stack air pressure reaches the target value; Determining whether the stack air concentration is greater than a preset second threshold value A1, and when the determination result is yes, turning on the power supply and controlling the stack current of the stack (100) to increase to a preset first current value S1; Determining whether a single-chip voltage value of the battery stack (100) is less than a preset first voltage value V1, and when the determination result is yes, controlling the battery stack current of the battery stack (100) to increase to a preset second current value S2; The first three-way valve (11) and the second three-way valve (15) are set to be fully closed, and the air compressor is set to intermittently operate at the lowest speed; whether the hydrogen pressure is within a set range is judged, and when the judgment result is yes, the power supply (300) is shut down, and the stack current of the stack (100) is controlled to drop to a preset third current value S3; It is determined whether the single-chip voltage value of the battery stack (100) is less than a preset second voltage value V2; if the determination result is yes, the air system (101), the hydrogen system (201), and the cooling system (301) are shut down.

2. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method steps according to claim 1 are implemented.

3. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method steps according to claim 1 are implemented.

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