Fuel cell system purging method and device

Abstract

The embodiment of the invention provides a fuel cell system purging method and device, and the method comprises the steps: obtaining the state of a fuel cell system, and opening a bypass valve based on the state of the fuel cell system; the feedback opening degree of the bypass valve is obtained, and a first flag bit is determined based on the feedback opening degree and the set opening degree; starting an air compressor to perform purging based on the first flag bit, performing purging timing, and determining the purging time; determining a second flag bit based on the purging time and the set purging time; and controlling the air compressor to perform mode conversion based on the second flag bit. The bypass valve is firstly opened, and then the air compressor is opened according to the opening degree of the bypass valve, so that the opening of the bypass valve and the starting of the air compressor are in sequence, an air passage is prevented from being blocked, and the risk of damaging the air compressor is reduced.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of automobiles, and particularly to a purging method and device for a fuel cell system. Background Art

[0002] In each case of starting a fuel cell vehicle, it is necessary to purge the air passage through the air module of the fuel cell system to avoid the risk caused by residual hydrogen. The current solution is to control / judge the opening of the bypass valve of the air module and the enabling of the air compressor by collecting the time when the fuel cell system enters the first set state, including whether it is enabled, whether high-voltage electricity is applied, whether it operates, and the condition for leaving the first set state and entering the second set state. Among them, by whether to enter the second set state from the first set state, the operation mode of the air compressor is controlled, that is, the speed control mode or the flow control mode.

[0003] Therefore, there is no prior logical order between the opening of the bypass valve and the enabling of the air compressor. There is a risk that the air compressor has started under the condition that the bypass valve is not opened, resulting in blocked air passages and damage to the air compressor. When the air compressor enters the air flow control mode from the speed control mode after purging, the enabling of the air compressor is interrupted because it is necessary to judge whether the feedback opening of the bypass valve meets the set opening, and perform debouncing processing on other judgment conditions, and the high-voltage electrical components are affected by the current impact caused by the recovery in a very short time, that is, the instantaneous drastic change or oscillation of the current, thus affecting the reliability and life of the air compressor. There is a coupling risk when the air compressor enters the flow control mode from the speed control mode, that is, within the same scheduling period, such as in this 10ms scheduling period, both the jump to the speed control mode and the entry into the air flow control mode are executed; and the actuator scheduling task of the air compressor is much larger than the scheduling period of the above algorithm, resulting in chaotic task execution. To sum up, a better purging solution is urgently needed. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a purging method for a fuel cell system. One or more embodiments of this specification simultaneously relate to a purging device for a fuel cell system, a computing device, a computer-readable storage medium, and a computer program to solve the technical defects existing in the prior art.

[0005] According to the first aspect of the embodiments of this specification, a purging method for a fuel cell system is provided, including:

[0006] Obtain the state of the fuel cell system, and open the bypass valve based on the state of the fuel cell system;

[0007] Obtain the feedback opening of the bypass valve, and determine the first flag bit based on the feedback opening and the set opening;

[0008] Based on the first flag bit, turn on the air compressor for purging, and start the purging timing to determine the purging time;

[0009] Based on the purging time and the set purging time, determine the second flag bit;

[0010] Based on the second flag bit, control the air compressor to perform mode conversion.

[0011] In a possible implementation, obtain the fuel cell system status, and based on the fuel cell system status, turn on the bypass valve, including:

[0012] Obtain the fuel cell system status, and when the fuel cell system status is entering the operating mode, control the bypass valve to open.

[0013] In a possible implementation, obtain the feedback opening of the bypass valve, and based on the feedback opening and the set opening, determine the first flag bit, including:

[0014] Obtain the feedback opening of the bypass valve, compare the feedback opening with the set opening to determine the comparison result;

[0015] When the comparison result is that the feedback opening is greater than or equal to the set opening, determine that the first flag bit is the first value;

[0016] When the comparison result is that the feedback opening is less than the set opening, determine that the first flag bit is the second value.

[0017] In a possible implementation, based on the first flag bit, turn on the air compressor for purging, and start the purging timing to determine the purging time, including:

[0018] When the first flag bit is the first value, turn on the air compressor for purging, and start the timer for purging timing to determine the purging time.

[0019] In a possible implementation, based on the purging time and the set purging time, determine the second flag bit, including:

[0020] When the purging time is greater than or equal to the set purging time, determine that the second flag bit is the third value;

[0021] When the purging time is less than the set purging time, determine that the second flag bit is the fourth value.

[0022] In a possible implementation, based on the second flag bit, control the air compressor to perform mode conversion, including:

[0023] When the second flag bit is the third value, switch the speed of the air compressor to the preset speed;

[0024] Obtain the current feedback opening degree of the bypass valve, and perform mode conversion based on the current feedback opening degree and the opening degree threshold.

[0025] In a possible implementation manner, obtaining the current feedback opening degree of the bypass valve and performing mode conversion based on the current feedback opening degree and the opening degree threshold includes:

[0026] Obtain the current feedback opening degree of the bypass valve. When the current feedback opening degree is greater than the opening degree threshold, determine that the third flag bit is the fifth value, and determine the continuous time for which the third flag bit is the fifth value;

[0027] When the continuous time exceeds the set time threshold, control the operation mode of the air compressor to be converted to the flow control mode.

[0028] According to the second aspect of the embodiments of the present specification, a fuel cell system purging device is provided, including:

[0029] A state determination module, configured to obtain the fuel cell system state and open the bypass valve based on the fuel cell system state;

[0030] A first flag module, configured to obtain the feedback opening degree of the bypass valve and determine the first flag bit based on the feedback opening degree and the set opening degree;

[0031] A purging timing module, configured to start purging the air compressor based on the first flag bit and perform purging timing to determine the purging time;

[0032] A second flag module, configured to determine the second flag bit based on the purging time and the set purging time;

[0033] A mode conversion module, configured to control the air compressor to perform mode conversion based on the second flag bit.

[0034] According to the third aspect of the embodiments of the present specification, a computing device is provided, including:

[0035] A memory and a processor;

[0036] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the above-mentioned fuel cell system purging method are implemented.

[0037] According to the fourth aspect of the embodiments of the present specification, a computer-readable storage medium is provided, which stores computer-executable instructions. When the instructions are executed by a processor, the steps of the above-mentioned fuel cell system purging method are implemented.

[0038] According to a fifth aspect of the embodiments of the present specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer is made to execute the steps of the above fuel cell system purging method.

[0039] The embodiments of the present specification provide a fuel cell system purging method and apparatus. The fuel cell system purging method includes: obtaining the state of the fuel cell system, and opening a bypass valve based on the state of the fuel cell system; obtaining the feedback opening degree of the bypass valve, and determining a first flag bit based on the feedback opening degree and the set opening degree; based on the first flag bit, starting an air compressor for purging, and performing purging timing to determine the purging time; determining a second flag bit based on the purging time and the set purging time; and controlling the air compressor to perform mode conversion based on the second flag bit. By first opening the bypass valve and then starting the air compressor according to the opening degree of the bypass valve, there is a sequence between the opening of the bypass valve and the start of the air compressor, avoiding blockage of the air passage and reducing the risk of damaging the air compressor. Description of the Drawings

[0040] Figure 1 is a schematic diagram of a scenario of a fuel cell system purging method provided by an embodiment of the present specification;

[0041] Figure 2 is a flowchart of a fuel cell system purging method provided by an embodiment of the present specification;

[0042] Figure 3 is a schematic structural diagram of a fuel cell system purging apparatus provided by an embodiment of the present specification;

[0043] Figure 4 is a structural block diagram of a computing device provided by an embodiment of the present specification. Detailed Embodiments

[0044] Many specific details are set forth in the following description in order to provide a thorough understanding of the present specification. However, the present specification can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present specification. Therefore, the present specification is not limited by the specific embodiments disclosed below.

[0045] The terms used in one or more embodiments of the present specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of the present specification. The singular forms "a" and "the" used in one or more embodiments of the present specification and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present specification refers to and includes any or all possible combinations of one or more of the associated listed items.

[0046] It should be understood that although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0047] First, the noun terms involved in one or more embodiments of this specification are explained.

[0048] Opening: Refers to the relative position of the valve between the open and closed states, usually expressed as a percentage or an angle.

[0049] State machine: Composed of a state register and combinational logic circuits, it can perform state transitions according to control signals in a pre-set state, and is a control center that coordinates the actions of related signals and completes specific operations.

[0050] Flag register: Also known as the Program Status Word (PSW). This is a register that stores condition code flags, control flags, and system flags.

[0051] In this specification, a purge method for a fuel cell system is provided. This specification also relates to a purge device for a fuel cell system, a computing device, and a computer-readable storage medium, which will be described in detail one by one in the following embodiments.

[0052] See Figure 1 , Figure 1 which shows a schematic diagram of a scenario of a purge method for a fuel cell system provided according to an embodiment of this specification.

[0053] In Figure 1 the application scenario of, the computing device 101 can obtain the state of the fuel cell system, open the bypass valve based on the state of the fuel cell system; obtain the feedback opening of the bypass valve, and determine the first flag bit 102 based on the feedback opening and the set opening. Then, the computing device 101 can start the air compressor for purging based on the first flag bit 102, and perform purging timing to determine the purge time 103. After that, the computing device 101 can determine the second flag bit 104 based on the purge time 103 and the set purge time. Finally, the computing device 101 can control the air compressor to perform mode conversion based on the second flag bit 104, as shown by reference numeral 105.

[0054] It should be noted that the above computing device 101 can be hardware or software. When the computing device 101 is hardware, it can be implemented as a distributed cluster composed of multiple servers or terminal devices, or as a single server or a single terminal device. When the computing device 101 is embodied as software, it can be installed in the above-listed hardware devices. It can be implemented as, for example, multiple software or software modules for providing distributed services, or as a single software or software module. No specific limitation is made here.

[0055] See Figure 2 , Figure 2 which shows a flowchart of a purging method for a fuel cell system according to an embodiment of the present specification, specifically including the following steps.

[0056] Step 201: Obtain the fuel cell system state and open the bypass valve based on the fuel cell system state.

[0057] Among them, the fuel cell system state can be the state of entering the operating mode, that is, the state before power generation, and the fuel cell system state can be determined by a state machine.

[0058] In a possible implementation manner, obtaining the fuel cell system state and opening the bypass valve based on the fuel cell system state includes: obtaining the fuel cell system state, and controlling the bypass valve to open when the fuel cell system state is the state of entering the operating mode.

[0059] In practical applications, when obtaining the fuel cell system state and the fuel cell system state enters state A of the state machine, trigger to control the bypass valve to open, and preset a set opening degree SpOpnVlv1 in advance. Among them, state A of the state machine can be the state of the fuel cell system entering the operating mode.

[0060] Step 202: Obtain the feedback opening degree of the bypass valve and determine a first flag bit based on the feedback opening degree and the set opening degree.

[0061] Among them, the flag bit can be a flag bit determined by a flag register. For example, the flag bit is 1 or 0. When the flag bit is 1, it indicates that the feedback opening degree meets the set opening degree SpOpnVlv1, and the air compressor is started. When the flag bit is 0, it indicates that the feedback opening degree does not meet the set opening degree SpOpnVlv1, and the air compressor is not started. The first flag bit represents the magnitude relationship between the feedback opening degree and the set opening degree, and the first flag bit can be expressed as ABVG_OpnVlv_Flg1.

[0062] In a possible implementation, obtaining the feedback opening of the bypass valve and determining the first flag bit based on the feedback opening and the set opening includes: obtaining the feedback opening of the bypass valve, comparing the feedback opening with the set opening to determine the comparison result; when the comparison result is that the feedback opening is greater than or equal to the set opening, determining that the first flag bit is the first value; when the comparison result is that the feedback opening is less than the set opening, determining that the first flag bit is the second value.

[0063] Wherein, the first value can be 1 and the second value can be 0.

[0064] In practical applications, when the feedback opening ABVG_sOpnVlv1 of the bypass valve meets the set opening SpOpnVlv1, its flag bit ABVG_OpnVlv_Flg1 is set to 1; when the feedback opening ABVG_sOpnVlv1 of the bypass valve does not meet the set opening SpOpnVlv1, ABVG_OpnVlv_Flg1 is set to 0.

[0065] It should be noted that the setting range of the set opening SpOpnVlv1 needs to be determined according to different types of bypass valves. The set opening SpOpnVlv1 can be the maximum opening value of the bypass valve. For example, if the maximum opening of bypass valve A is 90%, then the set opening SpOpnVlv1 is 90%.

[0066] Step 203: Based on the first flag bit, start the air compressor for purging, and perform purging timing to determine the purging time.

[0067] Wherein, purging can be purging the air pipeline through the air compressor.

[0068] In a possible implementation, based on the first flag bit, starting the air compressor for purging and performing purging timing to determine the purging time includes: when the first flag bit is the first value, starting the air compressor for purging, starting the timer for purging timing, and determining the purging time.

[0069] In practical applications, when the feedback opening ABVG_sOpnVlv1 of the bypass valve meets the set opening SpOpnVlv1, the flag bit ABVG_OpnVlv_Flg1 of the bypass valve is set to 1, then the enable of the air compressor is set to 1, that is, high voltage is applied to the air compressor and the air compressor is started. When the enable of the air compressor is set to 1, the purging timer of the air compressor starts timing.

[0070] Furthermore, when the feedback opening ABVG_sOpnVlv1 of the bypass valve does not meet the set opening SpOpnVlv1, the flag bit ABVG_OpnVlv_Flg1 of the bypass valve is set to 0, then the enable of the air compressor is set to 0, that is, the air compressor does not start.

[0071] Step 204: Determine a second flag bit based on the purging time and the set purging time.

[0072] Wherein, the second flag bit can be a flag bit indicating whether the purging is completed. For example, the second flag bit can be AC_Fsh_Flg.

[0073] In a possible implementation, determining the second flag bit based on the purging time and the set purging time includes: when the purging time is greater than or equal to the set purging time, determining the second flag bit as a third value; when the purging time is less than the set purging time, determining the second flag bit as a fourth value.

[0074] Wherein, the third value can be 1, indicating that the purging is completed; the fourth value can be 0, indicating that the purging has not been completed yet.

[0075] In practical applications, the enable of the air compressor is set to 1, and the purging timer of the air compressor starts timing. When the time value of the timer is less than the set purging time, the air compressor purging completion flag bit AC_Fsh_Flg is set to 0. If the time value of the timer is greater than or equal to the set purging time, the air compressor purging completion flag bit AC_Fsh_Flg is set to 1.

[0076] In the embodiments of this specification, by first opening the bypass valve and then opening the air compressor according to the opening degree of the bypass valve, there is a sequence between the opening of the bypass valve and the start of the air compressor, avoiding the blockage of the air passage and reducing the risk of damaging the air compressor.

[0077] Step 205: Control the air compressor to perform mode conversion based on the second flag bit.

[0078] Wherein, the mode conversion can be the conversion of the operating mode of the air compressor. For example, it is converted from the speed control mode to the flow control mode.

[0079] In a possible implementation, controlling the air compressor to perform mode conversion based on the second flag bit includes: when the second flag bit is the third value, switching the speed of the air compressor to a preset speed; obtaining the current feedback opening degree of the bypass valve, and performing mode conversion based on the current feedback opening degree and the opening degree threshold.

[0080] Wherein, the current feedback opening degree can be expressed as ABVG_sOpnVlv2, and the opening degree threshold can be expressed as SpOpnVlv2.

[0081] In practical applications, when the time value of the timer is greater than or equal to the set purging time, the air compressor purging completion flag bit AC_Fsh_Flg is set to 1, and the rotational speed of the air compressor is switched to the preset rotational speed, which can be 0, that is, the rotational speed controller mode is stopped. Then, it is determined whether the feedback opening degree ABVG_sOpnVlv2 of the bypass valve meets the set opening degree SpOpnVlv2, and mode conversion is performed based on the determination result.

[0082] Furthermore, in the prior art, when the air compressor enters the air flow control mode from the rotational speed control mode after purging, the air compressor enables an interruption (because it is necessary to determine whether the feedback opening degree ABVG_sOpnVlv2 of the bypass valve meets the set opening degree SpOpnVlv2 and perform debouncing processing on other determination conditions), and it resumes in a very short time, causing a current impact on the high-voltage electrical components, that is, an instantaneous sharp change or oscillation of the current, which affects the reliability and service life of the air compressor. In this solution, after the air compressor starts purging, the determination of whether the feedback opening degree ABVG_sOpnVlv2 of the bypass valve meets the set opening degree SpOpnVlv2 is cancelled, and only the determination of whether the feedback opening degree ABVG_sOpnVlv1 of the bypass valve meets the set opening degree SpOpnVlv1 is performed. When the feedback opening degree ABVG_sOpnVlv1 of the bypass valve meets the set opening degree SpOpnVlv1, the enable of the air compressor is set to 1. When the feedback opening degree ABVG_sOpnVlv1 of the bypass valve does not meet the set opening degree SpOpnVlv1, the air compressor stops running. Thus, the problem of short-time interruption of the air compressor enable in the prior art is solved, the instantaneous sharp change or oscillation of the current is avoided, and the reliability and service life of the air compressor are improved.

[0083] In a possible implementation manner, obtaining the current feedback opening degree of the bypass valve and performing mode conversion based on the current feedback opening degree and the opening degree threshold includes: obtaining the current feedback opening degree of the bypass valve. When the current feedback opening degree is greater than the opening degree threshold, determining that the third flag bit is the fifth value and determining the continuous time during which the third flag bit is the fifth value; when the continuous time exceeds the set time threshold, controlling the operation mode of the air compressor to be converted to the flow control mode.

[0084] Among them, the fifth value can be 1 or 0. The time threshold is the judgment threshold for debouncing processing. For example, the time threshold is 1 second. Debouncing processing is to prevent the instability of the judgment result of the current feedback opening degree and the opening degree threshold, and to judge the results of at least two judgments. For example, the current feedback opening degree and the opening degree threshold are judged twice. If the results of both judgments are that the current feedback opening degree is greater than the opening degree threshold, it means that the judgment result does not jitter and the next step can be executed; otherwise, if one of the two judgment results is that the current feedback opening degree is greater than the opening degree threshold and the other is that the current feedback opening degree is less than the opening degree threshold, it means that the judgment result jitters and the next step is not performed.

[0085] In practical applications, it is judged whether the bypass valve feedback opening degree ABVG_sOpnVlv2 meets the set opening degree SpOpnVlv2. If the feedback opening degree ABVG_sOpnVlv2 is greater than or equal to the set opening degree SpOpnVlv2, the third flag bit is set to 1, and it is judged whether the time when the third flag bit is set to 1 is greater than the time threshold, that is, debouncing processing. If the time when the third flag bit is set to 1 is greater than the time threshold, the air compressor flow control mode is entered, and at this time, the air compressor speed control mode has exited.

[0086] It should be noted that the exit time of the air compressor speed control mode needs to be greater than the step length for detecting the air compressor speed control mode. For example, the actuator of the air compressor performs a detection of the speed control mode every 1 millisecond, and the exit time of the speed control mode is 0.5 seconds, then the actuator of the air compressor can detect the exit of the speed control mode. In practical applications, the detection time of the actuator of the air compressor can be set as needed to improve or reduce the detection accuracy. Thus, a smooth transition from the speed control mode to the flow control mode can be achieved.

[0087] The embodiments of this specification provide a fuel cell system purging method and device. The fuel cell system purging method includes: obtaining the state of the fuel cell system, and opening the bypass valve based on the state of the fuel cell system; obtaining the feedback opening degree of the bypass valve, and determining the first flag bit based on the feedback opening degree and the set opening degree; starting the air compressor for purging based on the first flag bit, and performing purging timing to determine the purging time; determining the second flag bit based on the purging time and the set purging time; controlling the air compressor to perform mode conversion based on the second flag bit. By first opening the bypass valve and then starting the air compressor according to the opening degree of the bypass valve, the opening of the bypass valve and the start of the air compressor have a sequential order, avoiding the blockage of the air passage and reducing the risk of damaging the air compressor.

[0088] Corresponding to the above method embodiments, this specification also provides embodiments of a fuel cell system purging device. Figure 3The figure shows a schematic structural diagram of a purge device for a fuel cell system provided by an embodiment of this specification. As Figure 3 shown, the device includes:

[0089] A status determination module 301, configured to obtain the status of the fuel cell system and open the bypass valve based on the status of the fuel cell system;

[0090] A first flag module 302, configured to obtain the feedback opening degree of the bypass valve and determine a first flag bit based on the feedback opening degree and the set opening degree;

[0091] A purge timing module 303, configured to start the air compressor for purging based on the first flag bit, perform purge timing, and determine the purge time;

[0092] A second flag module 304, configured to determine a second flag bit based on the purge time and the set purge time;

[0093] A mode conversion module 305, configured to control the air compressor to perform mode conversion based on the second flag bit.

[0094] In a possible implementation manner, the status determination module 301 is further configured to:

[0095] Obtain the status of the fuel cell system, and control the bypass valve to open when the status of the fuel cell system is entering the operating mode.

[0096] In a possible implementation manner, the first flag module 302 is further configured to:

[0097] Obtain the feedback opening degree of the bypass valve, compare the feedback opening degree with the set opening degree, and determine the comparison result;

[0098] When the comparison result is that the feedback opening degree is greater than or equal to the set opening degree, determine that the first flag bit is a first value;

[0099] When the comparison result is that the feedback opening degree is less than the set opening degree, determine that the first flag bit is a second value.

[0100] In a possible implementation manner, the purge timing module 303 is further configured to:

[0101] When the first flag bit is the first value, start the air compressor for purging, start the timer for purge timing, and determine the purge time.

[0102] In a possible implementation manner, the second flag module 304 is further configured to:

[0103] When the purge time is greater than or equal to the set purge time, determine that the second flag bit is a third value;

[0104] When the purging time is less than the set purging time, determine that the second flag bit is the fourth value.

[0105] In a possible implementation, the mode conversion module 305 is further configured to:

[0106] When the second flag bit is the third value, switch the rotational speed of the air compressor to a preset rotational speed;

[0107] Obtain the current feedback opening degree of the bypass valve, and perform mode conversion based on the current feedback opening degree and the opening degree threshold.

[0108] In a possible implementation, the mode conversion module 305 is further configured to:

[0109] Obtain the current feedback opening degree of the bypass valve. When the current feedback opening degree is greater than the opening degree threshold, determine that the third flag bit is the fifth value, and determine the continuous time when the third flag bit is the fifth value;

[0110] When the continuous time exceeds the set time threshold, control the operation mode of the air compressor to be converted to the flow control mode.

[0111] The embodiments of this specification provide a fuel cell system purging method and device. The fuel cell system purging device includes: obtaining the fuel cell system state, and opening the bypass valve based on the fuel cell system state; obtaining the feedback opening degree of the bypass valve, and determining the first flag bit based on the feedback opening degree and the set opening degree; starting the air compressor for purging based on the first flag bit, and performing purging timing to determine the purging time; determining the second flag bit based on the purging time and the set purging time; controlling the air compressor to perform mode conversion based on the second flag bit. By first opening the bypass valve and then starting the air compressor according to the opening degree of the bypass valve, there is a sequential order between the opening of the bypass valve and the start of the air compressor, avoiding the blockage of the air passage and reducing the risk of damaging the air compressor.

[0112] The above is a schematic solution of a fuel cell system purging device in this embodiment. It should be noted that the technical solution of this fuel cell system purging device and the technical solution of the above fuel cell system purging method belong to the same concept. For the details not described in the technical solution of the fuel cell system purging device, reference can be made to the description of the technical solution of the above fuel cell system purging method.

[0113] Figure 4 FIG. shows a structural block diagram of a computing device 400 according to an embodiment of this specification. The components of the computing device 400 include, but are not limited to, a memory 410 and a processor 420. The processor 420 is connected to the memory 410 through a bus 430, and a database 450 is used to store data.

[0114] The computing device 400 also includes an access device 440, which enables the computing device 400 to communicate via one or more networks 460. Examples of such networks include the Public Switched Telephone Network (PSTN), Local Area Network (LAN), Wide Area Network (WAN), Personal Area Network (PAN), or a combination of communication networks such as the Internet. The access device 440 may include one or more of any type of wired or wireless network interface (e.g., network interface card (NIC)), such as an IEEE 802.11 Wireless Local Area Network (WLAN) wireless interface, Worldwide Interoperability for Microwave Access (Wi-MAX) interface, Ethernet interface, Universal Serial Bus (USB) interface, cellular network interface, Bluetooth interface, Near Field Communication (NFC).

[0115] In one embodiment of the present specification, the above components of the computing device 400 and Figure 4 other components not shown may also be connected to each other, for example, via a bus. It should be understood that Figure 4 the block diagram of the computing device shown is for illustrative purposes only and is not a limitation on the scope of the present specification. Those skilled in the art can add or replace other components as needed.

[0116] The computing device 400 can be any type of stationary or mobile computing device, including mobile computers or mobile computing devices (e.g., tablet computers, personal digital assistants, laptop computers, notebook computers, netbooks, etc.), mobile phones (e.g., smartphones), wearable computing devices (e.g., smartwatches, smart glasses, etc.) or other types of mobile devices, or stationary computing devices such as desktop computers or personal computers (PCs). The computing device 400 can also be a mobile or stationary server.

[0117] Among them, the processor 420 is configured to execute the following computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the above fuel cell system purging method are implemented. The above is a schematic solution of a computing device according to this embodiment. It should be noted that the technical solution of this computing device and the technical solution of the above fuel cell system purging method belong to the same concept. For the details not described in detail in the technical solution of the computing device, reference can be made to the description of the technical solution of the above fuel cell system purging method.

[0118] An embodiment of this specification also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the above fuel cell system purging method are implemented.

[0119] The above is a schematic solution of a computer-readable storage medium according to this embodiment. It should be noted that the technical solution of this storage medium and the technical solution of the above fuel cell system purging method belong to the same concept. For the details not described in detail in the technical solution of the storage medium, reference can be made to the description of the technical solution of the above fuel cell system purging method.

[0120] An embodiment of this specification also provides a computer program. When the computer program is executed on a computer, the computer is made to execute the steps of the above fuel cell system purging method.

[0121] The above is a schematic solution of a computer program according to this embodiment. It should be noted that the technical solution of this computer program and the technical solution of the above fuel cell system purging method belong to the same concept. For the details not described in detail in the technical solution of the computer program, reference can be made to the description of the technical solution of the above fuel cell system purging method.

[0122] The above describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain implementations, multitasking and parallel processing are also possible or may be advantageous.

[0123] The computer instructions include computer program code, which may be in the form of source code, object code, executable files, or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, removable hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice within the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0124] It should be noted that for the foregoing method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of this specification are not limited by the described action sequence, because according to the embodiments of this specification, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential for the embodiments of this specification.

[0125] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0126] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The alternative embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the embodiments of this specification, so that those skilled in the art can understand and utilize this specification well. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A fuel cell system purging method, It is characterized in that include: Acquiring a fuel cell system state, and opening a bypass valve based on the fuel cell system state; Acquiring a feedback opening of the bypass valve, and determining a first flag position based on the feedback opening and a set opening; Based on the first flag position, the air compressor is started to perform purging, and a purging timing is performed to determine the purging time; Determine a second flag based on the purge time and set purge time; The air compressor is controlled to perform mode conversion based on the second flag.

2. The method according to claim 1, It is characterized in that The obtaining of the fuel cell system state and opening the bypass valve based on the fuel cell system state includes: The fuel cell system state is acquired, and when the fuel cell system state is in the operation mode, the bypass valve is controlled to open.

3. The method according to claim 1, It is characterized in that The obtaining of the feedback opening of the bypass valve and determining the first flag position based on the feedback opening and the set opening include: Obtaining a feedback opening of the bypass valve, comparing the feedback opening with a set opening, and determining a comparison result; When the comparison result is that the feedback opening is greater than or equal to the set opening, determining the first flag bit to be a first value; When the comparison result is that the feedback opening is smaller than the set opening, the first flag is determined to be a second value.

4. The method according to claim 3, It is characterized in that The method of starting the air compressor for purging based on the first flag, timing the purging, and determining the purging time includes: When the first flag bit is the first value, the air compressor is turned on for purging, and a timer is turned on for purging timing to determine the purging time.

5. The method according to claim 1, It is characterized in that The determining of the second flag bit based on the purge time and the set purge time includes: When the purge time is greater than or equal to the set purge time, determining that the second flag bit is a third value; When the purge time is less than the set purge time, the second flag is determined to be a fourth value.

6. The method according to claim 5, It is characterized in that The controlling the air compressor to perform mode conversion based on the second flag bit includes: When the second flag bit is the third value, switching the speed of the air compressor to a preset speed; The current feedback opening of the bypass valve is acquired, and a mode conversion is performed based on the current feedback opening and an opening threshold.

7. The method according to claim 6, It is characterized in that The obtaining of the current feedback opening of the bypass valve and performing mode conversion based on the current feedback opening and an opening threshold comprises: Acquire the current feedback opening of the bypass valve, and when the current feedback opening is greater than the opening threshold, determine that the third flag is a fifth value, and determine the continuous time that the third flag is the fifth value; When the continuous time exceeds a set time threshold, the operation mode of the air compressor is controlled to be converted into a flow control mode.

8. A fuel cell system purge device, It is characterized in that include: a state determination module configured to obtain a fuel cell system state and open the bypass valve based on the fuel cell system state; A first flag module is configured to obtain a feedback opening of the bypass valve and determine a first flag position based on the feedback opening and a set opening; a purge timing module, configured to start the air compressor for purge based on the first flag, and to perform purge timing to determine the purge time; A second flag module is configured to determine a second flag bit based on the purge time and set purge time; A mode conversion module is configured to control the air compressor to perform mode conversion based on the second flag.

9. A computing device, It is characterized in that include: Memory and processor; The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the fuel cell system purging method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, implement the steps of the fuel cell system purging method according to any one of claims 1 to 7.

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