Sweeping and blowing device, system and method of fuel cell and storage medium

Abstract

The invention relates to the technical field of fuel cells, in particular to a sweeping and blowing device, system and method of a fuel cell and a storage medium, and the device comprises a sweeping and blowing inlet formed in an electric pile shell of the fuel cell; and the turbocharger is connected with the sweeping and blowing inlet and the exhaust pipeline of the fuel cell, the turbocharger is driven by waste gas of the exhaust pipeline, the turbocharger sucks air to sweep and blow the electric pile shell of the fuel cell, the flow demand of an air compressor is not additionally increased, and the system efficiency reduction caused by ventilation of the electric pile shell is prevented. Therefore, the problems that the flow demand of an air compressor is increased, the energy consumption of the air compressor is increased, the working efficiency of a fuel cell engine system is reduced and the like due to the fact that air is basically taken from a main air path of a fuel cell system in a solution scheme for ventilation of the fuel cell stack shell in the related technology are solved.

Description

Technical Field

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

[0002] PEMFC (Proton Exchange Membrane Fuel Cell) is an efficient and clean energy conversion device. With its high energy conversion efficiency and environmental protection characteristics, it has become one of the most promising energy sources. The working principle of PEMFC is to generate electricity through the electrochemical reaction of hydrogen and oxygen, and the only by-product is water, which makes it a pollution-free, green and environmentally friendly energy technology.

[0003] In the fuel cell system, the stack assembly, as the core component of PEMFC, is responsible for the electrochemical reaction of hydrogen and oxygen. In order to ensure the reliable operation of the stack in complex environments and meet the functional requirements of the fuel cell system in terms of load bearing, protection and hydrogen and electricity safety, the exposed stack is usually placed in a closed protective shell.

[0004] However, during the normal operation of PEMFC, since the seal is not absolute, a small amount of hydrogen will leak into the cavity of the stack shell. As the working time of the stack increases, the hydrogen concentration in the shell may gradually accumulate to close to 4%, and this concentration level is close to the lower explosion limit of the combustible mixture formed by hydrogen in the air. In order to avoid the potential explosion risk caused by hydrogen accumulation, forced ventilation is usually used to introduce air to dilute the hydrogen concentration inside the stack shell to maintain it within a safe range below the explosion limit. Although this method can effectively reduce the risk of hydrogen explosion, it also increases the workload of the air compressor, resulting in higher energy consumption. Not only does it increase the operating cost of the system, but it also reduces the overall working efficiency of the fuel cell engine system.

[0005] To solve this problem, Figure 1 As shown, the related technology proposes a device, including an air filter 1, an intake pipe 2, an air compressor 3, an intercooler 4, a fuel cell stack shell 5, a fuel cell stack 6, a fuel cell controller 7, a solenoid valve 8, a hydrogen concentration sensor 9, an outlet pipe 10, an intake pipe 11, and an air tail exhaust pipe 12. Based on the Venturi tube intake pipe, the Venturi effect is utilized, and the fuel cell controller adjusts the opening of the solenoid valve according to the hydrogen concentration in the fuel cell stack shell and the air compressor speed, which can ensure that the hydrogen concentration in the fuel cell stack shell is within a safe range, reduce hydrogen consumption, and save costs.

[0006] Therefore, the relevant technology solves the problem that the hydrogen concentration in the shell may exceed the safe range and pose a safety hazard. However, since a Venturi-type air intake pipe with a neck structure is added to the air path, and air is taken from the main air path to ventilate the stack shell, the air compressor flow load is increased, and the air compressor power consumption is increased. Summary of the invention

[0007] The present application provides a fuel cell purge device, system, method and storage medium to solve the problem that the solutions for the ventilation of the fuel cell stack casing in the related art basically take air from the main air path of the fuel cell system, which increases the flow demand of the air compressor, increases the energy consumption of the air compressor, and reduces the working efficiency of the fuel cell engine system.

[0008] A first aspect of the present application provides a purge device for a fuel cell, comprising: a purge inlet arranged on the stack shell of the fuel cell; a turbocharger connected to the purge inlet and the exhaust pipe of the fuel cell, the turbocharger is driven by exhaust gas from the exhaust pipe, and the turbocharger draws air to purge the stack shell of the fuel cell.

[0009] Optionally, the turbocharger is connected to the scavenging inlet via a pipeline.

[0010] Optionally, the turbocharger comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet inputs exhaust gas from the exhaust pipe, the first outlet discharges the exhaust gas, the second inlet inputs air, and the second outlet inputs air to the scavenging inlet.

[0011] The second aspect of the present application provides a fuel cell system, including: the purge device of the fuel cell of the first aspect; a purge inlet and a purge outlet are arranged on the fuel cell stack shell; a hydrogen concentration sensor is arranged in the fuel cell stack shell; and a controller is used to control the connection between the turbocharger and the exhaust pipe according to the hydrogen concentration detected by the hydrogen concentration sensor.

[0012] Optionally, an air outlet of the fuel cell stack is provided on the fuel cell stack housing, and the air outlet is connected to an exhaust assembly.

[0013] Optionally, the exhaust component also includes a back pressure valve, a three-way valve and an air tail pipe, the back pressure valve and the three-way valve are arranged on the exhaust pipe, the three-way valve is respectively connected to the back pressure valve, the air tail pipe and the turbocharger, and is used to control the opening and closing of the air tail pipe and the pipeline between the air tail pipe and the turbocharger.

[0014] Optionally, an air inlet of the fuel cell stack is provided on the fuel cell stack housing, and the air inlet is connected to an air intake assembly.

[0015] Optionally, the air intake assembly includes an air filter, an air compressor and an intercooler.

[0016] A third aspect embodiment of the present application provides a fuel cell purging method, wherein the method is based on the purging device of the fuel cell of the first aspect for purging, wherein the method comprises the following steps: obtaining the hydrogen concentration in the stack shell of the fuel cell; if the hydrogen concentration is less than the purging threshold, controlling the turbocharger and the exhaust line to be disconnected; if the hydrogen concentration is greater than or equal to the purging threshold, controlling the turbocharger and the exhaust line to be connected, using the exhaust gas from the exhaust line to drive the turbocharger, and the turbocharger draws air to purge the stack shell of the fuel cell.

[0017] The fourth aspect of the present application provides a computer-readable storage medium having a computer program or instruction stored thereon. When the computer program or instruction is executed, the fuel cell purge method of the third aspect is implemented.

[0018] Therefore, this application includes the following beneficial effects:

[0019] The purge device of the fuel cell provided in the embodiment of the present application is provided with a purge inlet on the stack housing of the fuel cell, the purge inlet and the exhaust line of the fuel cell are connected to the turbocharger, the exhaust gas of the exhaust line is used to drive the turbocharger, the turbocharger draws air to purge the stack housing of the fuel cell, and the hydrogen leaked from the fuel cell stack into the stack housing is blown out to avoid the accumulation of hydrogen in the stack housing and reaching the explosion limit of hydrogen. Since the purge ventilation is achieved by driving the turbocharger with exhaust gas, the extraction will not increase the flow demand of the air compressor, and the system efficiency is prevented from being reduced due to the ventilation of the stack housing. Thus, the solution of the ventilation of the fuel cell stack housing in the related art is solved, which needs to take air from the main air path of the fuel cell system, increases the flow demand of the air compressor, increases the energy consumption of the air compressor, and reduces the working efficiency of the fuel cell engine system.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 An example diagram of a fuel cell stack housing ventilation device provided for related technology;

[0023] Figure 2 This is a structural example diagram of a purge device for a fuel cell provided according to an embodiment of the present application;

[0024] Figure 3 This is a diagram showing an example structure of a fuel cell system provided according to an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the system operation when the stack housing does not need to be ventilated and purged according to an embodiment of the present application;

[0026] Figure 5 A system working principle diagram for ventilation and purging of a stack casing according to an embodiment of the present application;

[0027] Figure 6 The figure is a schematic flow chart of a fuel cell purge method according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The following describes the purge device, system, method and storage medium of the fuel cell of the embodiment of the present application with reference to the accompanying drawings. In view of the problems that the solutions to the ventilation of the fuel cell stack shell in the related technologies mentioned in the above background technology are basically to take air from the main air path of the fuel cell system, which increases the flow demand of the air compressor, increases the energy consumption of the air compressor, and reduces the working efficiency of the fuel cell engine system, the present application provides a purge device for a fuel cell, which is provided by setting a purge inlet on the stack shell of the fuel cell, connecting the purge inlet and the exhaust pipe of the fuel cell to the turbocharger, and driving the turbocharger with the exhaust gas of the exhaust pipe. The turbocharger draws air to purge the stack shell of the fuel cell, which will not increase the flow demand of the air compressor, and prevents the system efficiency from decreasing due to the ventilation of the stack shell. Thus, the problems that the solutions to the ventilation of the fuel cell stack shell in the related technologies are basically to take air from the main air path of the fuel cell system, which increases the flow demand of the air compressor, increases the energy consumption of the air compressor, and reduces the working efficiency of the fuel cell engine system are solved.

[0030] Specifically, Figure 1 This is a structural example diagram of a fuel cell purge device provided in an embodiment of the present application.

[0031] like Figure 1 As shown, the purge device 10 of the fuel cell includes: a purge inlet 101 , an exhaust pipe 102 and a turbocharger 103 .

[0032] Among them, the purge inlet 101 is arranged on the stack shell of the fuel cell; the turbocharger 103 connected to the purge inlet 101 and the exhaust pipe 102 of the fuel cell uses the exhaust gas from the exhaust pipe 102 of the fuel cell to drive the turbocharger 103, and the turbocharger 103 draws air to purge the stack shell of the fuel cell.

[0033] It can be understood that the embodiment of the present application provides a turbocharger 103, which is connected to the purge inlet 101 and the exhaust pipe 102 of the fuel cell. The exhaust gas from the exhaust pipe 102 of the fuel cell can drive the turbocharger 103. After being driven, the turbocharger 103 can absorb air to purge the fuel cell stack shell, thereby achieving the purpose of purging the stack shell. In addition, the turbocharger 103 takes air from the atmosphere, which can effectively avoid additional power consumption of the air compressor.

[0034] In the embodiment of the present application, the turbocharger 103 is connected to the purge inlet 101 through a pipeline.

[0035] It can be understood that in the embodiment of the present application, the turbocharger 103 is connected to the purge inlet 101 through a pipeline, and the pipeline can realize air flow between the two.

[0036] In the embodiment of the present application, the turbocharger 103 includes a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet inputs exhaust gas from the exhaust pipe, the first outlet discharges the exhaust gas, the second inlet inputs air, and the second outlet inputs air to the purge inlet 101.

[0037] It can be understood that the turbocharger 103 of the embodiment of the present application has two inlets and two outlets. The first inlet uses the exhaust gas discharged from the exhaust pipe 102 of the fuel cell to drive the turbine blades, drive the coaxial compressor blades, compress the intake air from the second inlet, realize the input of air, discharge the exhaust gas from the first outlet through the pipeline, and input the air from the second outlet to the purge inlet 101.

[0038] According to the fuel cell purge device proposed in the embodiment of the present application, a purge inlet is set on the fuel cell stack shell, the purge inlet and the exhaust pipe of the fuel cell are connected to the turbocharger, and the exhaust gas in the exhaust pipe is used to drive the turbocharger. The turbocharger draws air to purge the fuel cell stack shell, which does not increase the flow demand of the air compressor, thereby preventing the system efficiency from being reduced due to ventilation of the stack shell.

[0039] Next, the fuel cell system proposed according to the embodiment of the present application is described with reference to the accompanying drawings.

[0040] Figure 2 It is a block diagram of a fuel cell system according to an embodiment of the present application.

[0041] like Figure 2 As shown, the fuel cell system 20 includes: a purge device 10 of a fuel cell, a purge outlet 201 , a hydrogen concentration sensor 202 and a controller 203 .

[0042] Among them, the purge inlet 101 and the purge outlet 201 are arranged on the fuel cell stack shell; the hydrogen concentration sensor 202 is arranged in the fuel cell stack shell; the controller 203 is used to control the on-off between the turbocharger 103 and the exhaust pipe 102 according to the hydrogen concentration detected by the hydrogen concentration sensor 202.

[0043] The hydrogen concentration sensor 202 is a device specifically used to detect the hydrogen concentration in the environment, and can monitor the hydrogen concentration in the stack shell of the fuel cell in real time.

[0044] It can be understood that in the embodiment of the present application, a hydrogen concentration sensor 202 is set in the stack shell of the fuel cell. The hydrogen concentration sensor 202 can monitor the hydrogen concentration in the stack shell of the fuel cell in real time and feed back to the controller 203. The controller 203 controls the connection between the turbocharger 103 and the exhaust pipe 102 according to the hydrogen concentration. When connected, air is taken in through the purge inlet 101 and air is discharged through the purge outlet 201, thereby completing the purge work.

[0045] In the embodiment of the present application, an air outlet of the fuel cell stack is provided on the fuel cell stack housing, and the air outlet is connected to an exhaust assembly.

[0046] Among them, the air outlet is an opening or channel reserved on the fuel cell stack shell, which can discharge the exhaust gas generated during the operation of the stack.

[0047] It can be understood that an air outlet is reserved on the stack shell of the fuel cell in the embodiment of the present application, and the air outlet is connected to an exhaust assembly, which can be used to discharge exhaust gas generated during the operation of the stack from the air outlet.

[0048] In an embodiment of the present application, the exhaust component also includes a back pressure valve, a three-way valve and an air tail pipe. The back pressure valve and the three-way valve are arranged on the exhaust pipe. The three-way valve is respectively connected to the back pressure valve, the air tail pipe and the turbocharger, and is used to control the opening and closing of the air tail pipe and the pipeline between the air tail pipe and the turbocharger.

[0049] Among them, the main function of the back-pressure valve is to establish a certain back pressure under specific circumstances. The opening of the back-pressure valve can be enlarged to keep the air path flow resistance the same as when the turbine is not introduced; the three-way valve is a valve with three openings that can connect three different pipelines and allow the gas to switch flow direction between the three pipelines; the air path tail pipe is used to discharge the treated exhaust gas into the atmosphere.

[0050] It can be understood that the exhaust component connected to the air outlet in the embodiment of the present application includes a back-pressure valve, a three-way valve and an air path tail pipe, and the back-pressure valve is used to keep the air path flow resistance the same as when the turbine is not introduced; the three-way valve is respectively connected to the back-pressure valve, the air path tail pipe and the turbocharger, and the three-way valve is used to control the connection and disconnection of the air outlet and the air path tail pipe and the turbocharger.

[0051] In the embodiment of the present application, an air inlet of the fuel cell stack is provided on the fuel cell stack housing, and the air inlet is connected to an air intake assembly.

[0052] The air inlet is an opening or channel on the stack shell, which is used to introduce outside air into the fuel cell stack.

[0053] It can be understood that the embodiment of the present application leaves an opening or channel on the fuel cell stack shell as the air inlet of the fuel cell stack, the air inlet is connected to the air intake assembly, and the air enters the fuel cell stack through the air inlet after being processed by the air intake assembly.

[0054] In an embodiment of the present application, the air intake assembly includes an air filter, an air compressor and an intercooler.

[0055] Among them, the air filter is a device used to filter the air before it enters the fuel cell stack, which can remove dust, particulate matter and other impurities in the air; the air compressor is used to increase the air pressure entering the fuel cell stack to ensure sufficient oxygen supply to the fuel cell reaction; the intercooler is used to cool the compressed air. The cooled air is denser and can provide more oxygen to the fuel cell stack, thereby improving the efficiency of the system.

[0056] It can be understood that in the embodiment of the present application, the air intake assembly includes an air filter, an air compressor and an intercooler. After being purified by the air filter, compressed by the air compressor and cooled by the intercooler, the air enters the fuel cell stack through the air inlet to participate in the fuel cell reaction.

[0057] According to the fuel cell system proposed in the embodiment of the present application, through the coordinated action of the purge device of the fuel cell, the purge inlet and the purge outlet arranged on the stack shell, the hydrogen concentration sensor and the controller, the on-off connection between the turbocharger and the exhaust pipe is controlled according to the hydrogen concentration detected by the hydrogen concentration sensor, and the exhaust gas from the exhaust pipe is used to drive the turbocharger, and the turbocharger draws air to purge the stack shell of the fuel cell, which does not increase the flow demand of the air compressor and prevents the system efficiency from being reduced due to ventilation of the stack shell.

[0058] The fuel cell system is further described below through a specific embodiment, as follows:

[0059] Figure 4 , Figure 5 The schematic diagram of the fuel cell system proposed in this embodiment working under different hydrogen concentrations is as follows: Figure 4 , Figure 5 As shown, the system includes: a purge inlet 101, a purge outlet 201, a hydrogen concentration sensor 202, an air inlet 301, an air outlet 305, an intercooler 302, an air compressor 303, an air filter 304, a back pressure valve 306, a three-way valve 307, a turbocharger 103 and an air path tail pipe 308.

[0060] The following describes different working modes of this embodiment from two different hydrogen concentrations, specifically:

[0061] (1) When the hydrogen concentration in the shell does not reach 1%, the stack shell does not need to be ventilated and purged. The principle is as follows Figure 4 As shown, the details are as follows:

[0062] The hydrogen concentration in the stack shell is monitored by the hydrogen concentration sensor 202 in the stack shell. When the hydrogen concentration in the shell does not reach 1%, the stack shell does not need to be ventilated and purged. The fuel cell engine system controller controls the three-way valve 307 to discharge the air after the stack reaction directly into the atmosphere through the back pressure valve 306, the three-way valve 307 and the air path tail exhaust pipe 308. At this time, the power P of the air compressor 303 is determined by the air path flow rate Q and the air path flow resistance R, and the calculation method is as follows:

[0063] P = Q·(R air filter + R intercooler + R stack + R back pressure valve + R three-way valve + R pipeline).

[0064] (2) When the hydrogen concentration in the shell reaches 1%, the stack shell needs to be ventilated and purged. The principle is as follows Figure 5 As shown, the details are as follows:

[0065] The hydrogen concentration in the stack shell is monitored by the hydrogen concentration sensor 202 in the stack shell. When the hydrogen concentration in the shell reaches 1%, the stack shell needs to be ventilated and purged. The fuel cell engine system controller controls the three-way valve 307 to connect the air path tail pipe 308 to the turbocharger 103. The exhaust gas drives the turbocharger 103, takes air from the atmosphere, enters the stack shell through the shell purge inlet 101 to purge the stack, and then passes through the shell purge outlet 201 to discharge the mixed gas of air and hydrogen into the atmosphere. At this time, the power of the air compressor 303 is:

[0066] P=Q·(R air filter+R intercooler+R stack+R back pressure valve+R three-way valve+R turbine+R pipeline).

[0067] Although a turbine, a flow resistance element, is added to the air path system, the air flow rate remains unchanged and the back-pressure valve opening is adjustable, so the opening of the back-pressure valve can be increased to keep the air path flow resistance the same as when the turbine is not introduced, thereby ensuring that the power consumption of the air compressor is consistent with when the turbine is not introduced.

[0068] The present application also provides a fuel cell purge method, which is based on a fuel cell purge device. Figure 6 As shown, the method comprises the following steps:

[0069] In step S401, the hydrogen concentration in the stack casing of the fuel cell is obtained.

[0070] The acquisition method is achieved by setting a hydrogen concentration sensor in the stack shell of the fuel cell.

[0071] It can be understood that in the embodiment of the present application, a hydrogen concentration sensor is disposed in the stack shell of the fuel cell, and the hydrogen concentration in the stack shell of the fuel cell is monitored and obtained in real time through the hydrogen concentration sensor.

[0072] In step S402 , if the hydrogen concentration is less than the scavenging threshold, the turbocharger is controlled to be disconnected from the exhaust pipe.

[0073] The purge threshold is the hydrogen concentration threshold that needs to be purged, which is set according to actual needs and is not specifically limited here. It is worth mentioning that since the volume fraction of hydrogen accumulates to 4% and reaches the explosion limit, the purge threshold can generally be set to 1%.

[0074] It can be understood that the embodiment of the present application sets a purge threshold to determine whether purge is required. When the hydrogen concentration sensor monitors in real time that the hydrogen concentration in the fuel cell stack shell is less than the purge threshold, the fuel cell stack shell does not need to be ventilated and purged, and the turbocharger and the exhaust line are controlled to be disconnected, and no purge work is performed.

[0075] In step S403, if the hydrogen concentration is greater than or equal to the scavenging threshold, the turbocharger and the exhaust pipe are controlled to be connected, and the exhaust gas in the exhaust pipe is used to drive the turbocharger, and the turbocharger draws air to purge the fuel cell stack housing.

[0076] It can be understood that when the hydrogen concentration sensor monitors in real time that the hydrogen concentration in the fuel cell stack shell is greater than the purge threshold, the fuel cell stack shell needs to be ventilated and purged, so the turbocharger and the exhaust pipe are controlled to be connected, and the exhaust gas in the exhaust pipe is used to drive the turbocharger. The turbocharger draws air to purge the fuel cell stack shell, thereby reducing the hydrogen concentration in the fuel cell stack shell.

[0077] It should be noted that the above explanation of the fuel cell system embodiment is also applicable to the fuel cell purge method of this embodiment, which will not be repeated here.

[0078] According to the purging method of the fuel cell proposed in the embodiment of the present application, the hydrogen concentration in the stack shell of the fuel cell is obtained by a hydrogen concentration sensor. When the hydrogen concentration is less than the purging threshold, the turbocharger and the exhaust pipe are controlled to be disconnected, and the scavenging work is not performed; when the hydrogen concentration is greater than or equal to the scavenging threshold, the turbocharger and the exhaust pipe are controlled to be connected, and the exhaust gas in the exhaust pipe is used to drive the turbocharger. The turbocharger draws air to purge the stack shell of the fuel cell, which does not increase the flow demand of the air compressor, thereby preventing the system efficiency from being reduced due to ventilation of the stack shell.

[0079] The embodiment of the present application also provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed, the above-mentioned fuel cell purge method is implemented.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0083] It should be understood that the various parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, the steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0084] A person of ordinary skill in the art may understand that all or part of the steps carried by the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0085] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A purge device for a fuel cell, characterized in that: include: A purge inlet is provided on a stack housing of the fuel cell; A turbocharger connected to the purge inlet and the exhaust pipeline of the fuel cell drives the turbocharger using exhaust gas from the exhaust pipeline, and the turbocharger draws air to purge the stack housing of the fuel cell.

2. The fuel cell purge device according to claim 1, characterized in that: The turbocharger is connected to the purge inlet through a pipeline.

3. The purge device of the fuel cell according to claim 1, characterized in that: The turbocharger includes a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet inputs the exhaust gas of the exhaust pipe, the first outlet discharges the exhaust gas, the second inlet inputs air, and the second outlet inputs the air to the purge inlet.

4. A fuel cell system, characterized in that: include: The purge device for a fuel cell according to any one of claims 1 to 3; The fuel cell stack housing is provided with a purge inlet and a purge outlet; A hydrogen concentration sensor disposed in a stack housing of the fuel cell; The controller is used to control the connection between the turbocharger and the exhaust pipe according to the hydrogen concentration detected by the hydrogen concentration sensor.

5. The fuel cell system according to claim 4, characterized in that: The fuel cell stack housing is provided with an air outlet of the fuel cell stack, and the air outlet is connected to an exhaust assembly.

6. The fuel cell system according to claim 5, characterized in that: The exhaust component also includes a back pressure valve, a three-way valve and an air path tail pipe, wherein the back pressure valve and the three-way valve are arranged on the exhaust pipeline, and the three-way valve is respectively connected to the back pressure valve, the air path tail pipe and the turbocharger, and is used to control the opening and closing of the air path tail pipe and the pipeline between the air path tail pipe and the turbocharger.

7. The fuel cell system according to claim 4, characterized in that: The fuel cell stack housing is provided with an air inlet of the fuel cell stack, and the air inlet is connected to an air intake assembly.

8. The fuel cell system according to claim 4, characterized in that: The air intake assembly includes the air filter, air compressor and intercooler.

9. A fuel cell purge method, characterized in that: The method is based on the purge device of the fuel cell according to any one of claims 1 to 3, wherein the method comprises the following steps: Obtaining the hydrogen concentration in the stack shell of the fuel cell; If the hydrogen concentration is less than the purge threshold, disconnecting the turbocharger from the exhaust pipe is controlled; If the hydrogen concentration is greater than or equal to the purge threshold, the turbocharger and the exhaust pipe are controlled to be connected, and the exhaust gas from the exhaust pipe is used to drive the turbocharger, and the turbocharger draws air to purge the fuel cell stack housing.

10. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the fuel cell purging method of claim 9 is implemented.

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