Fuel cell purging method, purging device and vehicle

Abstract

The invention provides a fuel cell purging method and device and a vehicle, a purging system comprises a first pipeline, a second pipeline, an air compressor, an intercooler, a humidifier and a tail discharge pipe, the humidifier is connected with the tail discharge pipe through the second pipeline, the first pipeline is connected with the intercooler through the first pipeline, the first pipeline is provided with a first bypass valve, and the second pipeline is provided with a second bypass valve; the first bypass valve is normally closed, the air compressor is used for blowing air into the intercooler, and the method comprises the steps that when the fuel cell is in a shutdown state, the environment temperature is obtained; under the condition that the environment temperature is smaller than a first threshold value, a first bypass valve is opened, an air compressor is started, and dry air is discharged through an intercooler, a first pipeline, a second pipeline and a tail discharge pipe so as to purge the tail discharge pipe; and under the condition that the air compressor is started for a preset duration, the first bypass valve is closed, and the air compressor is closed. The method solves the problem that in the prior art, blowing control is carried out according to the conventional working condition, and the part blowing requirement in the abnormal environment cannot be met.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a fuel cell purging method, a purging device, a computer-readable storage medium and a vehicle. Background Art

[0002] After the proton exchange membrane fuel cell is finished working, the residual gas in the stack and pipeline needs to be purged to ensure smooth operation the next time. Different components in the fuel cell have different purge times and requirements. For example, insufficient or excessive purge of the stack may cause the stack to decay, and insufficient purge of the pipeline may cause water to accumulate, which is prone to ice formation in low temperature environments.

[0003] The purge control logic in the prior art is mostly based on the differentiation of normal operating conditions or temperature states, and does not take into account changes in the external environment. Under the influence of different external environments, the same purge time may result in insufficient or over-purge, and the purge process may result in tail exhaust hydrogen enrichment, affecting system safety.

[0004] In summary, the prior art lacks a purging method that is applicable to different working conditions. Summary of the invention

[0005] The main purpose of the present application is to provide a fuel cell purging method, a purging device, a computer-readable storage medium and a vehicle, so as to at least solve the problem in the prior art that purging control according to conventional working conditions cannot meet the parts purging requirements under abnormal environments.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present application, a purging method for a fuel cell is provided, the purging method is used to control a purging system, the purging system includes a first pipeline, a second pipeline, an air compressor, an intercooler, a humidifier and a tail pipe, the humidifier is connected to the tail pipe through the second pipeline, the first pipeline and the intercooler are connected through the first pipeline, a first bypass valve is installed between the connecting port of the first pipeline and the second pipeline and the connecting port of the first pipeline and the intercooler, the first bypass valve is normally closed, the air compressor is used to blow air into the intercooler, the method includes: when the fuel cell is in a shutdown state, obtaining an ambient temperature; when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; when the air compressor is started for a preset time, closing the first bypass valve and the air compressor.

[0007] Optionally, starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe includes: obtaining the tilt angle of the whole vehicle, and when the ambient temperature is greater than a second threshold and the tilt angle of the whole vehicle is less than or equal to a third threshold, controlling the air compressor to operate at a first preset speed, and the second threshold is less than the first threshold.

[0008] Optionally, starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe also includes: when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is less than or equal to the third threshold, controlling the air compressor to operate at a second preset speed, the second preset speed being greater than the first preset speed; when the ambient temperature is greater than the second threshold and the vehicle inclination angle is greater than the third threshold, controlling the air compressor to operate at the second preset speed.

[0009] Optionally, starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe also includes: when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is greater than the third threshold, controlling the air compressor to operate at a third preset speed, and the third preset speed is greater than the second preset speed.

[0010] Optionally, the purge system also includes a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and a fuel cell stack, the intercooler is connected to the humidifier through the third pipeline, the humidifier is connected to the fuel cell stack through the fourth pipeline and the fifth pipeline, the intercooler and the fourth pipeline are connected through the sixth pipeline, the fourth pipeline and the fifth pipeline are connected through the seventh pipeline, the sixth pipeline is equipped with a second bypass valve, a first electrically-controlled valve is installed between the connecting port of the fourth pipeline and the sixth pipeline and the connecting port of the fourth pipeline and the seventh pipeline, a second electrically-controlled valve is installed between the connecting port of the fifth pipeline and the seventh pipeline and the connecting port of the fifth pipeline and the fuel cell stack, the connecting port of the seventh pipeline and the fourth pipeline A third electrically controlled valve is installed at the connecting port of the seventh pipeline and the fifth pipeline, the second bypass valve and the third electrically controlled valve are normally closed, and the first electrically controlled valve and the second electrically controlled valve are normally open. After obtaining the ambient temperature, the method further includes: when the ambient temperature is greater than or equal to the first threshold, closing the first electrically controlled valve, opening the second bypass valve, starting the air compressor, so that dry air is blown into the fuel cell stack through the intercooler, the sixth pipeline and the fourth pipeline, and discharged through the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe to purge the fuel cell stack; monitoring the high-frequency impedance of the fuel cell stack, determining the internal humidity of the fuel cell stack based on the high-frequency impedance, and closing the second bypass valve when the internal humidity is less than or equal to the fourth threshold.

[0011] Optionally, after closing the second bypass valve, the method further includes: opening the third electrically controlled valve, closing the second electrically controlled valve, so that dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe to purge the air pipeline; when the third electrically controlled valve is opened for a preset time, closing the third electrically controlled valve and shutting down the air compressor.

[0012] Optionally, the method further includes: obtaining the hydrogen concentration of the first pipeline, and when the hydrogen concentration is greater than or equal to a fifth threshold value, opening the first bypass valve and starting the air compressor to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; and when a preset time has passed since the air compressor was started, closing the first bypass valve and shutting down the air compressor.

[0013] According to another aspect of the present application, a purge device for a fuel cell is provided, the purge device is used to control a purge system, the purge system includes a first pipeline, a second pipeline, an air compressor, an intercooler, a humidifier and a tail pipe, the humidifier is connected to the tail pipe through the second pipeline, the first pipeline and the intercooler are connected through the first pipeline, a first bypass valve is installed between the connecting port of the first pipeline and the second pipeline and the connecting port of the first pipeline and the intercooler, the first bypass valve is normally closed, the air compressor is used to blow air into the intercooler, and the method includes: when the fuel cell is in a shutdown state, obtaining an ambient temperature; when the ambient temperature is less than a first threshold value, opening the first bypass valve and starting the air compressor to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; when the air compressor is started for a preset time, closing the first bypass valve and the air compressor.

[0014] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute any one of the methods described.

[0015] According to another aspect of the present application, a vehicle is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of the described methods.

[0016] Applying the technical solution of the present application, in the purging method of the above-mentioned fuel cell, first, when the above-mentioned fuel cell is in a shutdown state, the ambient temperature is obtained; then, when the above-mentioned ambient temperature is less than the first threshold value, the above-mentioned first bypass valve is opened, and the above-mentioned air compressor is started, so that dry air is discharged through the above-mentioned intercooler, the above-mentioned first pipeline, the above-mentioned second pipeline and the above-mentioned tail exhaust pipe to purge the above-mentioned tail exhaust pipe; finally, after the above-mentioned air compressor is started for a preset time, the above-mentioned first bypass valve is closed and the above-mentioned air compressor is turned off. The present application is set to monitor the ambient temperature in real time. When the ambient temperature is lower than the first threshold value, the first bypass valve and the air compressor are opened to purge the tail exhaust pipe to prevent local water accumulation in the pipeline under low temperature environment, resulting in ice. This method solves the problem that the purge control according to conventional working conditions in the prior art cannot meet the purge requirements of parts under abnormal environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A hardware structure block diagram of a mobile terminal according to a fuel cell purging method provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of a fuel cell purging method provided according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic structural diagram of a fuel cell provided according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic flow chart of a tail pipe anti-freezing purging method provided in accordance with an embodiment of the present application is shown;

[0021] Figure 5 A schematic flow chart of a conventional purging method provided according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic flow chart of a method for purging a tail pipe to prevent hydrogen concentration from increasing is shown according to an embodiment of the present application;

[0023] Figure 7 A structural block diagram of a fuel cell purge device provided according to an embodiment of the present application is shown.

[0024] The above drawings include the following reference numerals:

[0025] 102. Processor; 104. Memory; 106. Transmission equipment; 108. Input / output equipment; 1. Air filter; 2. Air compressor; 3. Intercooler; 4. Humidifier; 5. Fuel cell stack; 6. Tail exhaust pipe; 7. First bypass valve; 8. Second bypass valve; 9. First electronically controlled valve; 10. Second electronically controlled valve; 11. Third electronically controlled valve; 12. Hydrogen concentration sensor. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] As introduced in the background technology, the purge control logic in the prior art is mostly based on normal operating conditions or temperature state differentiation for control, and does not take into account changes with the external environment. In order to solve the problem that the purge control according to conventional conditions in the prior art cannot meet the purge requirements of parts under abnormal environments, the embodiments of the present application provide a fuel cell purge method, a purge device, a computer-readable storage medium and a vehicle.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a fuel cell purging method according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0032] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the display method of device information in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0033] In this embodiment, a purging method for a fuel cell running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0034] Figure 2 is a flow chart of a fuel cell purge method according to an embodiment of the present application. The purge method is used to control a purge system of a fuel cell. The structure of the fuel cell is shown in FIG. Figure 3 As shown, the fuel cell comprises at least the following structures:

[0035] Air filter 1, air compressor 2, intercooler 3, humidifier 4, fuel cell stack 5, tail exhaust pipe 6, first bypass valve 7, second bypass valve 8, first electronically controlled valve 9, second electronically controlled valve 10, third electronically controlled valve 11 and hydrogen concentration sensor 12.

[0036] like Figure 3 As shown, the pipeline connecting the humidifier 4 and the tail exhaust pipe 6 is the second pipeline, the pipeline connecting the intercooler 3 and the second pipeline is the first pipeline, a first bypass valve 7 is installed on the first pipeline, and a hydrogen concentration sensor 12 is installed on the second pipeline.

[0037] like Figure 3 As shown, the pipeline connecting the intercooler 3 and the humidifier 4 is the third pipeline.

[0038] like Figure 3 As shown, the pipelines connecting the humidifier 4 and the fuel cell stack are the fourth pipeline and the fifth pipeline, the pipeline connecting the fourth pipeline and the fifth pipeline is the seventh pipeline, and the first electrically controlled valve 9 is installed between the connecting port of the fourth pipeline and the seventh pipeline and the connecting port of the sixth pipeline and the fourth pipeline, the second electrically controlled valve 10 is installed between the connecting port of the fifth pipeline and the fuel cell stack 5 and the connecting port of the fifth pipeline and the seventh pipeline, and the third electrically controlled valve 11 is installed on the seventh pipeline.

[0039] like Figure 3 As shown, the pipeline connected between the intercooler and the fourth pipeline is the sixth pipeline, and a second bypass valve 8 is installed on the sixth pipeline.

[0040] In the above embodiment, when the fuel cell is in operation, the first electrically controlled valve 9 and the second electrically controlled valve 10 are in a normally open state, and the first bypass valve 7, the second bypass valve 8 and the third electrically controlled valve 11 are in a normally closed state.

[0041] It can be understood that, under the above-mentioned valve state, dry air is processed by the air filter 1, and then blown into the intercooler 3 through the air compressor 2, and then blown into the humidifier 4 through the above-mentioned third pipeline, and then the humidified air is blown into the above-mentioned fuel cell stack 5 through the above-mentioned fourth pipeline, and after the fuel cell stack reacts, it is blown into the above-mentioned humidifier 4 through the above-mentioned fifth pipeline, and then blown into the atmosphere through the above-mentioned second pipeline and the tail exhaust pipe 6.

[0042] like Figure 2 As shown, the above-mentioned fuel cell purging method includes the following steps:

[0043] Step S201, obtaining the ambient temperature when the fuel cell is in a shutdown state;

[0044] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0045] Step S202, when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe;

[0046] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0047] Step S203, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0048] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0049] Through this embodiment, first, when the fuel cell is in a shutdown state, the ambient temperature is obtained; then, when the ambient temperature is less than the first threshold, the first bypass valve is opened, and the air compressor is started, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; finally, after the air compressor is started for a preset time, the first bypass valve is closed and the air compressor is turned off. The present application is configured to monitor the ambient temperature in real time. When the ambient temperature is lower than the first threshold, the first bypass valve and the air compressor are opened to purge the tail pipe to prevent local water accumulation in the pipeline under low temperature conditions, resulting in ice. This method solves the problem in the prior art that the purge control according to conventional working conditions cannot meet the purge requirements of parts under abnormal conditions.

[0050] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the above step S202 includes:

[0051] Step S2021, obtaining the vehicle tilt angle, and when the ambient temperature is greater than the second threshold and the vehicle tilt angle is less than or equal to the third threshold, controlling the air compressor to operate at a first preset speed, and the second threshold is less than the first threshold.

[0052] Specifically, in addition to considering the ambient temperature, the inclination angle of the vehicle also needs to be considered for the water accumulation in the tail exhaust pipe. When the inclination angle is large, water is likely to accumulate in the tail exhaust pipe and then freeze.

[0053] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is greater than the above-mentioned second threshold and less than the above-mentioned first threshold and the above-mentioned vehicle inclination angle is less than or equal to the above-mentioned third threshold, it is determined that there is a risk of icing in the tail exhaust pipe of the current vehicle, but the vehicle inclination angle is small and the temperature is relatively high, so the air compressor can be controlled to run at a lower speed, that is, the above-mentioned air compressor is controlled to run at a first preset speed.

[0054] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the above step S202 further includes:

[0055] Step S2022, when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is less than or equal to the third threshold, controlling the air compressor to operate at a second preset speed, wherein the second preset speed is greater than the first preset speed;

[0056] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than or equal to the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is less than or equal to the above-mentioned third threshold value, it is determined that the current ambient temperature is low and the tail exhaust pipe is prone to icing, but the vehicle inclination angle is relatively small and water accumulation is not easy to occur. Therefore, the air compressor is controlled to run at a medium speed, that is, the air compressor is controlled to run at a second preset speed, and the above-mentioned second preset speed is greater than the above-mentioned first preset speed.

[0057] Step S2023, when the ambient temperature is greater than the second threshold and the vehicle inclination angle is greater than the third threshold, control the air compressor to operate at the second preset speed.

[0058] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than the above-mentioned first threshold value and greater than the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is greater than the above-mentioned third threshold value, it is determined that the current ambient temperature is low and there is a risk of icing, and the vehicle inclination angle is large, which is easy to cause water accumulation in the tail pipe. Therefore, the air compressor is controlled to run at a medium speed, that is, the air compressor is controlled to run at a second preset speed, and the above-mentioned second preset speed is greater than the above-mentioned first preset speed.

[0059] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the above step S202 further includes:

[0060] Step S2024, when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is greater than the third threshold, control the air compressor to operate at a third preset speed, and the third preset speed is greater than the second preset speed.

[0061] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than or equal to the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is greater than the above-mentioned third threshold value, it is determined that the current ambient temperature is low and the vehicle inclination angle is large. If the purge speed is low or the purge time is short, it is easy to cause the tail exhaust pipe to freeze in a low temperature environment. Therefore, the air compressor is controlled to run at a high speed, that is, the above-mentioned air compressor is controlled to run at the above-mentioned third preset speed, and the above-mentioned third preset speed is greater than the above-mentioned second preset speed.

[0062] In the above embodiment, if Figure 4 As shown, based on the influence of ambient temperature and vehicle tilt angle on the icing of the tail exhaust pipe, the working conditions with the risk of icing are distinguished, and then four working conditions are set, namely, the ambient temperature is greater than the second threshold and less than the first threshold and the vehicle tilt angle is less than the third threshold, the ambient temperature is greater than the second threshold and less than the first threshold and the vehicle tilt angle is greater than the third threshold, the ambient temperature is less than the second threshold and the vehicle tilt angle is less than the third threshold, and the ambient temperature is less than the second threshold and the vehicle tilt angle is greater than the third threshold. On the basis of the four working conditions, the air compressor is set to run at a low speed in the first working condition, at a medium speed in the second and third working conditions, and at a high speed in the fourth working condition, so as to prevent the tail exhaust pipe from freezing.

[0063] In order to purge the fuel cell after shutdown to ensure smooth start of the next operation, in an optional implementation, after obtaining the ambient temperature, the method further includes:

[0064] Step S301, when the ambient temperature is greater than or equal to the first threshold, close the first electrically controlled valve, open the second bypass valve, start the air compressor, and blow dry air into the fuel cell stack through the intercooler, the sixth pipeline, and the fourth pipeline, and discharge the dry air through the fifth pipeline, the humidifier, the first pipeline, and the tail exhaust pipe, so as to purge the fuel cell stack;

[0065] In one embodiment, when the ambient temperature is greater than the first threshold, it is determined that there is no risk of freezing in the pipeline, and the fuel cell can be purged routinely. The routine purging includes stack purging and pipeline purging. The stack purging includes: closing the first electric control valve, opening the second bypass valve, and starting the air compressor. After the above operations, dry air is blown into the stack through the intercooler, the sixth pipeline, and the fourth pipeline, and then discharged through the fifth pipeline, the humidifier, the first pipeline, and the tail pipe to achieve purging of the stack. Figure 5 shown.

[0066] Step S302, monitoring the high-frequency impedance of the fuel cell stack, determining the internal humidity of the fuel cell stack according to the high-frequency impedance, and closing the second bypass valve when the internal humidity is less than or equal to a fourth threshold.

[0067] In one embodiment, the fuel cell system indirectly measures the internal humidity of the fuel cell stack by online monitoring of the high-frequency impedance of the fuel cell stack. After the target humidity of the fuel cell stack is reached, that is, when the internal humidity is less than or equal to a fourth threshold value, the stack purge is terminated and closed, and the second bypass valve is closed.

[0068] In order to purge the fuel cell after shutdown to ensure smooth start-up of the next operation, in an optional implementation, after closing the second bypass valve, the method further includes:

[0069] Step S303, opening the third electrically controlled valve, closing the second electrically controlled valve, so that the dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe, so as to purge the air pipeline;

[0070] In one embodiment, the conventional purge includes stack purge and pipeline purge, and the stack purge includes: opening the third electrically controlled valve and closing the second electrically controlled valve. After the above operation, dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and then is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe to achieve the purge of the air pipeline. Figure 5 shown.

[0071] Step S304: When the third electrically-controlled valve is opened for a preset time, the third electrically-controlled valve is closed and the air compressor is turned off.

[0072] In one embodiment, the fuel cell system controls pipeline purging by time, and when the third electronically controlled valve is opened for a preset period of time, the first bypass valve is closed and the air compressor is turned off.

[0073] In order to prevent the tail exhaust hydrogen from being enriched and affecting the safety of the system, in an optional implementation, as Figure 6 As shown, the above method also includes:

[0074] Step S401, obtaining the hydrogen concentration of the first pipeline, and when the hydrogen concentration is greater than or equal to a fifth threshold, opening the first bypass valve and starting the air compressor to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail pipe, so as to purge the tail pipe;

[0075] Specifically, in order to avoid excessive hydrogen concentration in the tail exhaust pipe, the hydrogen concentration of the first pipeline is monitored in real time during the purging process. When the hydrogen concentration is greater than or equal to the fifth threshold value, it is determined that the hydrogen concentration exceeds the limit, the first bypass valve is opened, and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, and the hydrogen in the tail exhaust pipe is blown out at the same time.

[0076] Step S402, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0077] Specifically, the hydrogen purge is controlled by time monitoring in the present application, that is, after a preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0078] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0079] The embodiment of the present application also provides a purging device for a fuel cell. It should be noted that the purging device for a fuel cell in the embodiment of the present application can be used to perform the purging method for a fuel cell provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0080] The following is an introduction to the fuel cell purge device provided in the embodiments of the present application.

[0081] Figure 7 is a structural block diagram of a purge device for a fuel cell according to an embodiment of the present application. Figure 7 As shown, the device comprises:

[0082] A first acquisition unit 10 is used to acquire the ambient temperature when the fuel cell is in a shutdown state;

[0083] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0084] The first control unit 20 is used to open the first bypass valve and start the air compressor when the ambient temperature is less than the first threshold value, so that the dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe;

[0085] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0086] The second control unit 30 is used to close the first bypass valve and shut down the air compressor when a preset time has passed since the air compressor was started.

[0087] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0088] Through this embodiment, the first acquisition unit acquires the ambient temperature when the fuel cell is in a shutdown state; the first control unit opens the first bypass valve and starts the air compressor when the ambient temperature is less than the first threshold value, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; the second control unit closes the first bypass valve and the air compressor after a preset time has passed since the air compressor was started. The present application is configured to monitor the ambient temperature in real time. When the ambient temperature is lower than the first threshold value, the first bypass valve and the air compressor are opened to purge the tail pipe to prevent local water accumulation in the pipeline under low temperature conditions, resulting in ice. This method solves the problem in the prior art that the purge control according to conventional working conditions cannot meet the purge requirements of parts under abnormal conditions.

[0089] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the first control unit includes:

[0090] The first control module is used to obtain the tilt angle of the whole vehicle, and when the above-mentioned ambient temperature is greater than the second threshold and the above-mentioned tilt angle of the whole vehicle is less than or equal to the third threshold, control the above-mentioned air compressor to operate at a first preset speed, and the above-mentioned second threshold is less than the above-mentioned first threshold.

[0091] Specifically, in addition to considering the ambient temperature, the inclination angle of the vehicle also needs to be considered for the water accumulation in the tail exhaust pipe. When the inclination angle is large, water is likely to accumulate in the tail exhaust pipe and then freeze.

[0092] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is greater than the above-mentioned second threshold and less than the above-mentioned first threshold and the above-mentioned vehicle inclination angle is less than or equal to the above-mentioned third threshold, it is determined that there is a risk of icing in the tail exhaust pipe of the current vehicle, but the vehicle inclination angle is small and the temperature is relatively high, so the air compressor can be controlled to run at a lower speed, that is, the above-mentioned air compressor is controlled to run at a first preset speed.

[0093] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the above step S202 further includes:

[0094] A second control module is used to control the air compressor to operate at a second preset speed when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is less than or equal to the third threshold, and the second preset speed is greater than the first preset speed;

[0095] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than or equal to the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is less than or equal to the above-mentioned third threshold value, it is determined that the current ambient temperature is low and the tail exhaust pipe is prone to icing, but the vehicle inclination angle is relatively small and water accumulation is not easy to occur. Therefore, the air compressor is controlled to run at a medium speed, that is, the air compressor is controlled to run at a second preset speed, and the above-mentioned second preset speed is greater than the above-mentioned first preset speed.

[0096] The third control module is used to control the air compressor to operate at the second preset speed when the ambient temperature is greater than the second threshold and the vehicle inclination angle is greater than the third threshold.

[0097] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than the above-mentioned first threshold value and greater than the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is greater than the above-mentioned third threshold value, it is determined that the current ambient temperature is low and there is a risk of icing, and the vehicle inclination angle is large, which is easy to cause water accumulation in the tail pipe. Therefore, the air compressor is controlled to run at a medium speed, that is, the air compressor is controlled to run at a second preset speed, and the above-mentioned second preset speed is greater than the above-mentioned first preset speed.

[0098] In order to prevent the tail exhaust pipe from freezing at low temperature, in an optional implementation, the above step S202 further includes:

[0099] The fourth control module is used to control the air compressor to operate at a third preset speed when the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is greater than the third threshold, and the third preset speed is greater than the second preset speed.

[0100] In one embodiment, the present application is arranged that when the above-mentioned ambient temperature is less than or equal to the above-mentioned second threshold value and the above-mentioned vehicle inclination angle is greater than the above-mentioned third threshold value, it is determined that the current ambient temperature is low and the vehicle inclination angle is large. If the purge speed is low or the purge time is short, it is easy to cause the tail exhaust pipe to freeze in a low temperature environment. Therefore, the air compressor is controlled to run at a high speed, that is, the above-mentioned air compressor is controlled to run at the above-mentioned third preset speed, and the above-mentioned third preset speed is greater than the above-mentioned second preset speed.

[0101] In the above embodiment, if Figure 4 As shown, based on the influence of ambient temperature and vehicle tilt angle on the icing of the tail exhaust pipe, the working conditions with the risk of icing are distinguished, and then four working conditions are set, namely, the ambient temperature is greater than the second threshold and less than the first threshold and the vehicle tilt angle is less than the third threshold, the ambient temperature is greater than the second threshold and less than the first threshold and the vehicle tilt angle is greater than the third threshold, the ambient temperature is less than the second threshold and the vehicle tilt angle is less than the third threshold, and the ambient temperature is less than the second threshold and the vehicle tilt angle is greater than the third threshold. On the basis of the four working conditions, the air compressor is set to run at a low speed in the first working condition, at a medium speed in the second and third working conditions, and at a high speed in the fourth working condition, so as to prevent the tail exhaust pipe from freezing.

[0102] In order to purge the fuel cell after shutdown to ensure smooth start-up of the next operation, in an optional embodiment, the device further includes:

[0103] a third control unit, configured to, after obtaining the ambient temperature, close the first electrically controlled valve, open the second bypass valve, start the air compressor, and allow dry air to be blown into the fuel cell stack through the intercooler, the sixth pipeline, and the fourth pipeline, and discharged through the fifth pipeline, the humidifier, the first pipeline, and the tail exhaust pipe, so as to purge the fuel cell stack when the ambient temperature is greater than or equal to the first threshold;

[0104] In one embodiment, when the ambient temperature is greater than the first threshold, it is determined that there is no risk of freezing in the pipeline, and the fuel cell can be purged routinely. The routine purging includes stack purging and pipeline purging. The stack purging includes: closing the first electric control valve, opening the second bypass valve, and starting the air compressor. After the above operations, dry air is blown into the stack through the intercooler, the sixth pipeline, and the fourth pipeline, and then discharged through the fifth pipeline, the humidifier, the first pipeline, and the tail pipe to achieve purging of the stack. Figure 5 shown.

[0105] The fourth control unit is used to monitor the high-frequency impedance of the above-mentioned fuel cell stack, determine the internal humidity of the above-mentioned fuel cell stack according to the above-mentioned high-frequency impedance, and close the above-mentioned second bypass valve when the above-mentioned internal humidity is less than or equal to a fourth threshold value.

[0106] In one embodiment, the fuel cell system indirectly measures the internal humidity of the fuel cell stack by online monitoring of the high-frequency impedance of the fuel cell stack. After the target humidity of the fuel cell stack is reached, that is, when the internal humidity is less than or equal to a fourth threshold value, the stack purge is terminated and closed, and the second bypass valve is closed.

[0107] In order to purge the fuel cell after shutdown to ensure smooth start-up of the next operation, in an optional embodiment, the device further includes:

[0108] a fifth control unit, configured to open the third electrically controlled valve and close the second electrically controlled valve after closing the second bypass valve, so that the dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe, so as to purge the air pipeline;

[0109] In one embodiment, the conventional purge includes stack purge and pipeline purge, and the stack purge includes: opening the third electrically controlled valve and closing the second electrically controlled valve. After the above operation, dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and then is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe to achieve the purge of the air pipeline. Figure 5 shown.

[0110] The sixth control unit is used to close the third electrically-controlled valve and the air compressor when the third electrically-controlled valve is opened for a preset period of time.

[0111] In one embodiment, the fuel cell system controls pipeline purging by time, and when the third electronically controlled valve is opened for a preset period of time, the first bypass valve is closed and the air compressor is turned off.

[0112] In order to prevent tail exhaust hydrogen from being enriched and affecting system safety, in an optional embodiment, the above device further includes:

[0113] a seventh control unit, configured to obtain the hydrogen concentration of the first pipeline, and when the hydrogen concentration is greater than or equal to a fifth threshold value, open the first bypass valve and start the air compressor to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail pipe, so as to purge the tail pipe;

[0114] Specifically, in order to avoid excessive hydrogen concentration in the tail exhaust pipe, the hydrogen concentration of the first pipeline is monitored in real time during the purging process. When the hydrogen concentration is greater than or equal to the fifth threshold value, it is determined that the hydrogen concentration exceeds the limit, the first bypass valve is opened, and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, and the hydrogen in the tail exhaust pipe is blown out at the same time.

[0115] An eighth control unit is used to close the first bypass valve and shut down the air compressor when a preset time has passed since the air compressor was started.

[0116] Specifically, the hydrogen purge is controlled by time monitoring in the present application, that is, after a preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0117] The purge device of the fuel cell comprises a processor and a memory, the first acquisition unit, the first control unit and the second control unit are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0118] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the fuel cell purge under different working conditions can be achieved by adjusting the kernel parameters.

[0119] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0120] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the fuel cell purging method.

[0121] Specifically, the fuel cell purging method includes:

[0122] Step S201, obtaining the ambient temperature when the fuel cell is in a shutdown state;

[0123] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0124] Step S202, when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe;

[0125] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0126] Step S203, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0127] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0128] An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the fuel cell purging method is executed when the program is run.

[0129] Specifically, the fuel cell purging method includes:

[0130] Step S201, obtaining the ambient temperature when the fuel cell is in a shutdown state;

[0131] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0132] Step S202, when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe;

[0133] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0134] Step S203, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0135] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0136] An embodiment of the present invention provides a vehicle, the vehicle comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, at least the following steps are implemented:

[0137] Step S201, obtaining the ambient temperature when the fuel cell is in a shutdown state;

[0138] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0139] Step S202, when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe;

[0140] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0141] Step S203, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0142] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0143] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing at least the following method steps:

[0144] Step S201, obtaining the ambient temperature when the fuel cell is in a shutdown state;

[0145] Specifically, after the system issues a shutdown command, in order to ensure that the next use of the fuel cell is not affected, the fuel cell will be routinely purged for a preset time. After the routine purge is completed, in order to avoid the risk of low-temperature icing in the tail exhaust pipe, the present application is configured to monitor the ambient temperature of the vehicle's environment to obtain the above-mentioned ambient temperature.

[0146] Step S202, when the ambient temperature is less than a first threshold, opening the first bypass valve and starting the air compressor, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe;

[0147] Specifically, when the ambient temperature T0 is lower than the first threshold value T1, it is determined that there is a risk of low-temperature freezing of the tail exhaust pipe. At this time, the first bypass valve is opened and the air compressor is started to discharge dry air through the intercooler, the first pipeline, the second pipeline and the tail exhaust pipe. The tail exhaust pipe is purged with dry air to remove water accumulated in the tail exhaust pipe and prevent low-temperature freezing.

[0148] Step S203, when the preset time has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

[0149] Specifically, when the tail pipe is purged for the preset time, the first bypass valve and the air compressor are closed to restore the pipeline to a normal operating state for the next operation.

[0150] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0151] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0152] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0153] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0155] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0156] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0157] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0158] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0159] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0160] 1) The purging method of the fuel cell of the present application, first, when the fuel cell is in a shutdown state, obtain the ambient temperature; then, when the ambient temperature is less than the first threshold, open the first bypass valve, and start the air compressor, so that the dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe, so as to purge the tail pipe; finally, after the preset time has passed since the air compressor was started, close the first bypass valve and shut down the air compressor. The present application is configured to monitor the ambient temperature in real time. When the ambient temperature is lower than the first threshold, open the first bypass valve and the air compressor to purge the tail pipe, so as to prevent local water accumulation in the pipeline under low temperature environment, resulting in ice. This method solves the problem in the prior art that the purge control according to conventional working conditions cannot meet the purge requirements of parts under abnormal environment.

[0161] 2) The purge device of the fuel cell of the present application, the first acquisition unit acquires the ambient temperature when the fuel cell is in a shutdown state; the first control unit opens the first bypass valve and starts the air compressor when the ambient temperature is less than the first threshold value, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline and the tail pipe to purge the tail pipe; the second control unit closes the first bypass valve and the air compressor after a preset time has passed since the air compressor was started. The present application is configured to monitor the ambient temperature in real time. When the ambient temperature is lower than the first threshold value, the first bypass valve and the air compressor are opened to purge the tail pipe to prevent local water accumulation in the pipeline under low temperature conditions, resulting in ice. This method solves the problem in the prior art that the purge control according to conventional working conditions cannot meet the purge requirements of parts under abnormal conditions.

[0162] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fuel cell purging method, characterized in that: The purging method is used to control a purging system, the purging system comprising a first pipeline, a second pipeline, an air compressor, an intercooler, a humidifier and a tail pipe, the humidifier is connected to the tail pipe through the second pipeline, the first pipeline and the intercooler are connected through the first pipeline, a first bypass valve is installed between the connecting port of the first pipeline and the second pipeline and the connecting port of the first pipeline and the intercooler, the first bypass valve is normally closed, the air compressor is used to blow air into the intercooler, the method comprises: When the fuel cell is in a shutdown state, obtaining the ambient temperature; When the ambient temperature is lower than a first threshold, the first bypass valve is opened, and the air compressor is started, so that dry air is discharged through the intercooler, the first pipeline, the second pipeline, and the tail pipe, so as to purge the tail pipe; When the preset time period has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

2. The method according to claim 1, characterized in that Starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe includes: The vehicle tilt angle is obtained, and when the ambient temperature is greater than a second threshold and the vehicle tilt angle is less than or equal to a third threshold, the air compressor is controlled to operate at a first preset speed, and the second threshold is less than the first threshold.

3. The method according to claim 2, characterized in that Starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe also includes: When the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is less than or equal to the third threshold, controlling the air compressor to operate at a second preset speed, wherein the second preset speed is greater than the first preset speed; When the ambient temperature is greater than the second threshold and the vehicle inclination angle is greater than the third threshold, the air compressor is controlled to operate at the second preset speed.

4. The method according to claim 2, characterized in that: Starting the air compressor to discharge dry air through the intercooler, the first pipeline and the tail exhaust pipe also includes: When the ambient temperature is less than or equal to the second threshold and the vehicle inclination angle is greater than the third threshold, the air compressor is controlled to operate at a third preset speed, which is greater than the second preset speed.

5. The method according to claim 1, characterized in that The purge system further includes a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and a fuel cell stack, the intercooler is connected to the humidifier through the third pipeline, the humidifier is connected to the fuel cell stack through the fourth pipeline and the fifth pipeline, the intercooler is connected to the fourth pipeline through the sixth pipeline, the fourth pipeline and the fifth pipeline are connected through the seventh pipeline, the sixth pipeline is installed with a second bypass valve, a first electrically controlled valve is installed between a connecting port between the fourth pipeline and the sixth pipeline and a connecting port between the fourth pipeline and the seventh pipeline, a second electrically controlled valve is installed between a connecting port between the fifth pipeline and the seventh pipeline and a connecting port between the fifth pipeline and the fuel cell stack, a third electrically controlled valve is installed between a connecting port between the seventh pipeline and the fourth pipeline and a connecting port between the seventh pipeline and the fifth pipeline, the second bypass valve and the third electrically controlled valve are normally closed, and the first electrically controlled valve and the second electrically controlled valve are normally open. After obtaining the ambient temperature, the method further includes: When the ambient temperature is greater than or equal to the first threshold, the first electrically controlled valve is closed, the second bypass valve is opened, and the air compressor is started, so that dry air is blown into the fuel cell stack through the intercooler, the sixth pipeline, and the fourth pipeline, and discharged through the fifth pipeline, the humidifier, the first pipeline, and the tail exhaust pipe, so as to purge the fuel cell stack; The high-frequency impedance of the fuel cell stack is monitored, the internal humidity of the fuel cell stack is determined according to the high-frequency impedance, and the second bypass valve is closed when the internal humidity is less than or equal to a fourth threshold value.

6. The method according to claim 5, characterized in that After closing the second bypass valve, the method further includes: Open the third electrically controlled valve and close the second electrically controlled valve, so that dry air flows into the fourth pipeline through the intercooler, the third pipeline and the humidifier, and is discharged through the seventh pipeline, the fifth pipeline, the humidifier, the first pipeline and the tail exhaust pipe, so as to purge the air pipeline; When the third electrically-controlled valve is opened for a preset time, the third electrically-controlled valve is closed and the air compressor is turned off.

7. The method according to claim 1, characterized in that The method further comprises: acquiring a hydrogen concentration of the first pipeline, and when the hydrogen concentration is greater than or equal to a fifth threshold, opening the first bypass valve and starting the air compressor to discharge dry air through the intercooler, the first pipeline, the second pipeline, and the tail pipe, so as to purge the tail pipe; When the preset time period has passed since the air compressor was started, the first bypass valve is closed and the air compressor is turned off.

8. A fuel cell purge device, characterized in that: The purge device is used to control the purge system, and the purge system includes a first pipeline, an air compressor, an intercooler, a humidifier and a tail pipe. The first pipeline is respectively connected to the intercooler, the humidifier and the tail pipe. The first pipeline is installed with a first bypass valve, which is normally closed. The air compressor is used to blow air into the intercooler. The device includes: A first acquisition unit, used for acquiring the ambient temperature when the fuel cell is in a shutdown state; a first control unit, configured to, when the ambient temperature is less than a first threshold, open the first bypass valve and start the air compressor, so that dry air is discharged through the intercooler, the first pipeline and the tail exhaust pipe, so as to purge the tail exhaust pipe; The second control unit is used to close the first bypass valve and shut down the air compressor when a preset time has passed since the air compressor was started.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of claims 1 to 7.

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