Air supply system abnormal closing detection method and device, vehicle and storage medium

Abstract

The application provides a kind of gas supply system abnormal closing detection method, device, vehicle and storage medium, detection method includes: after gas supply system stops running, and before closing first valve, the pressure of gas supply pipeline and gas storage container after balancing is detected, and first pressure is obtained;Close each first valve, and open the first valve on the nth gas storage container, detect the pressure that nth gas storage container and gas supply pipeline are communicated, and second pressure is obtained, wherein n is greater than or equal to 1 and less than or equal to N integer;Compare first pressure with second pressure, if the difference between second pressure and first pressure is greater than or equal to preset threshold, then determine that the first valve corresponding to the nth gas storage container is the valve that is abnormally closed.The application realizes the detection of abnormally closed gas storage container, avoids the insufficient gas supply flow, the abnormal phenomenon such as endurance mileage due to part of gas storage container not being opened when gas supply system works.

Description

Technical Field

[0001] This application relates to the field of new energy technology, specifically to a method, device, vehicle, and storage medium for detecting abnormal shutdown of a gas supply system. Background Technology

[0002] Currently, with the development of hydrogen energy technology, hydrogen fuel cell vehicles are being used more and more widely. However, due to the characteristics of hydrogen itself, such as its light weight and flammability, the safety precautions of the hydrogen storage system in hydrogen fuel cell vehicles are particularly important. Summary of the Invention

[0003] It is worth noting that the following content is what the inventor discovered through research and should not be regarded as common knowledge in the art.

[0004] Through research, the inventors discovered that in actual use, hydrogen storage systems containing multiple hydrogen storage containers may experience abnormal shutdowns, leading to uneven hydrogen pressure across the containers. This results in some containers having low pressure while others have high pressure. If the hydrogen storage containers are reopened normally in this situation, hydrogen may flow from the high-pressure container to the low-pressure container in the gas supply line and between the containers, causing insufficient gas supply or interference with driving range, which is detrimental to the stability of the hydrogen storage system.

[0005] This application provides a method, device, vehicle, and storage medium for detecting abnormal shutdown of a gas supply system, aiming to solve the technical problem that insufficient gas supply flow or driving range interference caused by the failure of some hydrogen storage containers to be opened, thereby affecting the stability of the hydrogen storage system.

[0006] Firstly, this application provides a method for detecting abnormal shutdown of a gas supply system. The gas supply system includes a gas supply pipeline and N gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to the multiple gas storage containers, and the other end is used to connect to a gas-consuming device. N is an integer greater than 1. The detection method includes:

[0007] After the gas supply system stops operating and before the first valve is closed, the pressure after the gas supply line and the gas storage container are balanced is measured to obtain the first pressure;

[0008] Close each first valve and open the first valve on the nth gas storage container. Detect the pressure of the nth gas storage container connected to the gas supply pipeline to obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N.

[0009] Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the nth gas storage container is an abnormally closed valve.

[0010] In some embodiments, the method further includes:

[0011] Close the first valve on the nth gas storage container;

[0012] Open the first valve on the (n+1)th gas storage container, and detect the pressure of the (n+1)th gas storage container connected to the gas supply pipeline to obtain the third pressure;

[0013] Compare the first pressure with the third pressure. If the difference between the third pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the (n+1)th gas storage container is an abnormally closed valve.

[0014] In some embodiments, the method further includes:

[0015] For the remaining N-1 gas storage containers, repeat the following steps until the remaining N-1 gas storage containers have completed the abnormal shutdown detection:

[0016] Close the first valve corresponding to all gas storage containers;

[0017] Open the first valve of the i-th gas storage container, detect the pressure of the i-th gas storage container connected to the gas supply pipeline, and obtain the third pressure, where i is an integer greater than or equal to 1 and less than or equal to N-1;

[0018] Compare the first pressure with the third pressure. If the difference between the third pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the i-th gas storage container is an abnormally closed valve.

[0019] In some embodiments, after closing the first valve on the nth gas storage container and before opening the first valve on the (n+1)th gas storage container, detecting the pressure in the (n+1)th gas storage container connected to the gas supply pipeline, and before obtaining the third pressure, the method further includes:

[0020] Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, the exhaust mechanism is triggered to restore the air supply line to the first pressure.

[0021] In some embodiments, the gas supply line is provided with an exhaust branch, and the exhaust branch is provided with an exhaust valve. The step of triggering the exhaust mechanism to restore the gas supply line to a first pressure includes:

[0022] Open the exhaust valve to release excess gas through the exhaust branch;

[0023] The pressure of the gas supply line is continuously monitored. When the pressure of the gas supply line drops to the first pressure, the exhaust valve is closed to complete the exhaust process.

[0024] In some embodiments, the gas supply system further includes a gas recovery device connected to an exhaust branch, and the method further includes, prior to the step of opening the exhaust valve to discharge excess gas through the exhaust branch:

[0025] The pressure of the gas recovery device is detected to obtain the fourth pressure;

[0026] The fourth pressure is compared with the second pressure. If the second pressure is greater than the fourth pressure, the step of opening the exhaust valve to discharge excess gas through the exhaust branch is triggered.

[0027] In some embodiments, the method further includes:

[0028] Close the first valve on the nth gas storage container and open the first valve on the (n+1)th gas storage container. Detect the pressure connected between the (n+1)th gas storage container and the gas supply pipeline to obtain the measured pressure.

[0029] Based on the first pressure, the second pressure, the volume of the gas supply pipeline, and the volume of the (n+1)th gas storage container, calculate the expected pressure after connecting the (n+1)th gas storage container to the gas supply pipeline, assuming the (n+1)th gas storage container is at the first pressure.

[0030] Compare the measured pressure with the expected pressure. If the difference between the measured pressure and the expected pressure is greater than or equal to a preset threshold, then the first valve corresponding to the (n+1)th gas storage container is determined to be an abnormally closed valve.

[0031] In some embodiments, the step of calculating the expected pressure after connecting to the gas supply pipeline, assuming the (n+1)th gas storage container is at the first pressure, based on the first pressure, the second pressure, the volume of the gas supply pipeline, and the volume of the (n+1)th gas storage container, includes:

[0032] The desired pressure is calculated using the following formula based on the first pressure, the second pressure, the volume of the gas supply pipeline, and the volume of the (n+1)th gas storage container:

[0033] P0 = (P1*V1 + P2*V2) / (V1 + V2)

[0034] Wherein, P0 is the desired pressure, P1 is the first pressure, P2 is the second pressure, V1 is the volume of the (n+1)th gas storage container, and V2 is the volume of the gas supply pipeline.

[0035] Furthermore, since the temperatures are essentially equal at this point, the pressure P0 can be roughly estimated.

[0036] Secondly, this application provides a gas supply system abnormal shutdown detection device. The gas supply system includes a gas supply pipeline and N gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to the multiple gas storage containers, and the other end is used to connect to a gas-consuming device. N is an integer greater than 1. The detection device includes:

[0037] The control unit is used to control the opening and closing of the first valve;

[0038] The detection unit is used to detect the pressure of the gas supply line;

[0039] The processing unit performs the following steps:

[0040] After the gas supply system stops operating and before the first valve is closed, the pressure after the gas supply line and the gas storage container are balanced is measured to obtain the first pressure;

[0041] Close each first valve and open the first valve on the nth gas storage container. Detect the pressure of the nth gas storage container connected to the gas supply pipeline to obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N.

[0042] Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the nth gas storage container is an abnormally closed valve.

[0043] Thirdly, this application provides a vehicle, comprising:

[0044] Fuel cells;

[0045] The gas supply system includes a gas supply pipeline and multiple gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to the multiple gas storage containers, and the other end is connected to the fuel cell.

[0046] As described in the second aspect, the gas supply system abnormal shutdown detection device.

[0047] Thirdly, this application provides a storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the gas supply system abnormal shutdown detection method as described in the first aspect.

[0048] This application achieves the detection of abnormally closed gas storage containers by pre-recording the first pressure connecting the gas storage containers to the gas supply pipeline after the gas supply system stops supplying gas and before closing the first valves of all gas storage containers. Then, it closes all gas storage containers and opens the first valve of the Nth gas storage container, detects the Nth gas storage container and obtains the second pressure. By comparing the first pressure and the second pressure, if the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, it determines that the first valve corresponding to the Nth gas storage container is an abnormally closed valve. This avoids the phenomenon of insufficient gas supply flow and abnormal driving range caused by some gas storage containers not being opened when the gas supply system is working normally. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of a gas supply system provided in an embodiment of this application;

[0051] Figure 2 This is a schematic diagram of another structure of the gas supply system provided in the embodiments of this application;

[0052] Figure 3 This is a flowchart illustrating a gas supply system abnormal shutdown detection method provided in an embodiment of this application;

[0053] Figure 4 This is a schematic diagram of a continuous monitoring process for a gas supply system provided in an embodiment of this application;

[0054] Figure 5 This is another schematic diagram of the continuous monitoring process of the gas supply system provided in the embodiments of this application;

[0055] Figure 6 This is a structural block diagram of the gas supply system abnormal shutdown detection device provided in the embodiments of this application;

[0056] Figure 7 This is a structural block diagram of a vehicle provided in the embodiments of this application.

[0057] Among them, 10 is the gas supply pipeline, 20 is the gas storage container, 30 is the first valve, 40 is the second valve, 50 is the exhaust branch, 60 is the exhaust valve, 70 is the gas recovery device, 80 is the switch valve, 100 is the gas supply system, 500 is the gas supply system abnormal shutdown detection device, and 600 is the vehicle. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0061] This application provides a method, device, vehicle 600, and storage medium for detecting abnormal shutdown of a gas supply system, which will be described in detail below.

[0062] Before introducing the gas supply system abnormal shutdown detection method of this application, let's first introduce the gas supply system 100 in this application, see reference. Figure 1 , Figure 1This paper illustrates a structural schematic diagram of a gas supply system 100 in an embodiment of this application. The gas supply system 100 includes a gas supply pipeline 10 and N gas storage containers 20. Each gas storage container 20 is provided with a first valve 30. One end of the gas supply pipeline 10 is connected to the multiple gas storage containers 20, and the other end is used to connect to a gas-using device. N is an integer greater than 1.

[0063] Specifically, one end of the gas supply line 10 is connected to the gas storage container 20, and the other end is connected to a gas-consuming device, such as a hydrogen fuel cell. A second valve 40 can be installed at the end of the gas supply line 10 connected to the gas-consuming device to control the connection between the gas-consuming device and the gas storage container 20. In some embodiments of this application, such as... Figure 1 As shown, the gas supply pipeline 10 includes a main pipeline and multiple branch pipelines, which are respectively connected to multiple gas storage containers 20, thereby connecting multiple gas storage containers 20 to supply gas to the gas-using device.

[0064] The gas storage container 20 is used to store the gas consumed by the gas-using device, such as hydrogen. To facilitate the opening and closing of the gas storage container 20, a first valve 30 is provided at the connection between the gas storage container 20 and the gas supply pipeline 10. It can be understood that the first valve 30 controlling the opening and closing of the gas storage container 20 can also be directly provided in the gas supply pipeline 10, such as in the branch pipeline shown in some embodiments of this application.

[0065] In some embodiments of this application, the first valve 30 can be a bottle neck valve, which can allow gas to enter while prohibiting gas to exit when closed, and can be closed when gas is introduced into the gas storage container 20. It is understood that the first valve 30 can also prohibit both gas entry and gas exit when closed.

[0066] For further details, please refer to [link / reference]. Figure 2 , Figure 2 The diagram shows another structural schematic of the gas supply system 100 in this embodiment. In this embodiment, in addition to the first valve 30, there is also a switch valve 80 corresponding to each gas storage container 20 at the multiple branch pipelines connecting the gas storage container 20. That is, two valves are set for the same gas storage container 20. When the first valve 30 corresponding to the gas storage container 20 is opened due to abnormal detection, the switch valves 80 of other gas storage containers 20 are closed. Therefore, when the gas storage container 20 is abnormally closed, its higher pressure gas will not be filled into other gas storage containers 20.

[0067] Continue reading Figure 3 , Figure 3 This paper illustrates a flowchart of a gas supply system abnormal shutdown detection method according to an embodiment of this application, wherein the gas supply system abnormal shutdown detection method includes:

[0068] Step S201: After the gas supply system 100 stops supplying gas and before the first valve 30 is closed, the pressure after the gas supply pipeline 10 and the gas storage container 20 are balanced is detected to obtain the first pressure;

[0069] After the gas supply system 100 stops supplying gas, and before the first valve 30 is closed, the pressure after the gas supply line 10 and the gas storage container 20 are balanced can be detected to obtain the first pressure. Under normal circumstances, the pressure of all normally open gas storage containers 20 and gas supply lines 10 that are not abnormally closed is the same as the first pressure. If there is an abnormally closed gas storage container 20, the pressure of the normally open gas storage container 20 and gas supply lines 10 will be lower than that of the abnormally closed gas storage container 20 because the other normally open gas storage containers 20 have consumed gas. Specifically, the first pressure can be measured by a pressure sensor. For example, a pressure sensor can be installed on the gas supply line 10, and the first pressure can be obtained by acquiring the measurement value of the pressure sensor.

[0070] Step S202: Close each first valve 30 and open the first valve 30 on the nth gas storage container. Detect the pressure of the nth gas storage container connected to the gas supply pipeline 10 to obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N.

[0071] Closing each first valve 30 completes the shutdown process of the entire gas supply system 100. At this point, the abnormally closed gas storage containers 20 can be inspected. Specifically, the first valve 30 on the nth gas storage container can be randomly opened, and the pressure connecting the nth gas storage container to the gas supply line 10 can be measured to obtain the second pressure. If the first valve 20 corresponding to the nth gas storage container 30 is abnormally closed, the pressure of the nth gas storage container will be higher than the first pressure because the other normally open gas storage containers 20 have consumed gas. Consequently, the second pressure at the moment the nth gas storage container connects to the gas supply line 10 will be higher than the first pressure.

[0072] In some embodiments of this application, the first valve 30 on the nth gas storage container opens for a short time, that is, the connection between the nth gas storage container and the gas supply pipeline 10 is short and instantaneous, for example, the connection time is 1 second. Figure 1 The first valve 30 of the gas supply system is an embodiment of a bottle-mouth valve. Due to the short connection time, the impact of gas filling other gas storage containers can be ignored, thus avoiding interference with subsequent abnormal detection of other gas storage containers. It can be understood that the second pressure can also be the pressure that is reached after the nth gas storage container is connected to the gas supply pipeline 10 for a certain period of time (e.g., 30 seconds) and reaches equilibrium.

[0073] Step S203: Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the nth gas storage container with the second pressure is an abnormally closed valve.

[0074] After obtaining the first pressure and the second pressure, they can be compared. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold (e.g., 1 MPa), it can be determined that the first valve corresponding to the nth gas storage container with the obtained second pressure is an abnormally closed valve. For example, in an embodiment where the preset threshold is 1 MPa, if the first pressure is 20 MPa and the second pressure after the nth gas storage container is connected to the gas supply pipeline 10 is 23 MPa, it can be determined that the first valve corresponding to the nth gas storage container is an abnormally closed valve. Upon detecting that the first valve corresponding to the nth gas storage container is abnormally closed, it can be recorded or a notification can be sent to the user via the vehicle system, so that the user is promptly aware of the abnormal status of the gas storage system.

[0075] This application achieves the detection of abnormally closed gas storage containers 20 by pre-recording the first pressure of the gas storage container 20 connected to the gas supply pipeline 10 after the gas supply system stops operating and before closing the first valve 30 of all gas storage containers 20. Then, it closes all gas storage containers 20 and opens the first valve 30 of the nth gas storage container, detects the nth gas storage container and obtains the second pressure. By comparing the first pressure and the second pressure, if the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, it determines that the first valve corresponding to the nth gas storage container is an abnormally closed valve. This avoids the phenomenon of insufficient gas supply flow and abnormal driving range caused by some gas storage containers 20 not being opened when the gas supply system is working normally.

[0076] Furthermore, to facilitate continuous abnormal shutdown detection of multiple gas storage containers 20, please refer to [link / reference needed]. Figure 4 , Figure 4 This paper illustrates a flowchart of a continuous monitoring process for the gas supply system 100 in an embodiment of this application, wherein the continuous monitoring of the gas supply system 100 includes:

[0077] Step S301: Close the first valve 30 on the nth gas storage container;

[0078] Step S302: Open the first valve 30 on the (n+1)th gas storage container, detect the pressure of the (n+1)th gas storage container connected to the gas supply pipeline 10, and obtain the third pressure;

[0079] Step S303: Compare the first pressure with the third pressure. If the difference between the third pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve 30 corresponding to the (n+1)th gas storage container is an abnormally closed valve.

[0080] After closing the first valve 30 on the nth gas storage container and completing the abnormal detection of the next nth gas storage container, the first valve 30 of the (n+1)th gas storage container can be opened accordingly to detect the pressure of the (n+1)th gas storage container connected to the gas supply pipeline 10 and obtain the third pressure.

[0081] If the (n+1)th gas storage container is abnormally closed, the third pressure will be higher than the first pressure because the gas stored inside has not been consumed. Therefore, after obtaining the first pressure and the third pressure, the first pressure and the third pressure can be compared. If the difference between the third pressure and the first pressure is greater than or equal to a preset threshold (e.g., 1 MPa), it can be determined that the first valve 30 corresponding to the (n+1)th gas storage container is an abnormally closed valve.

[0082] It is worth noting that in some embodiments, such as embodiments where the diameter of the gas supply line 10 is small and the volume of gas it contains is small, since the volume ratio of the gas in the gas storage container 20 to the gas in the gas supply line 10 exceeds 100:1, although the pressure at the gas supply line 10 may be greater than the first pressure when performing abnormal shutdown detection on the (n+1)th gas storage container, the influence of the pressure at the gas supply line 10 can be ignored because the volume of the gas supply line 10 is small, thereby achieving abnormal shutdown detection on the (n+1)th gas storage container.

[0083] In some other embodiments of this application, the remaining N-1 gas storage containers can be detected cyclically. For example, the following steps are executed cyclically for the remaining N-1 gas storage containers until the remaining N-1 gas storage containers complete the abnormal closure detection: close the first valves corresponding to all gas storage containers; open the first valve of the i-th gas storage container, detect the pressure of the i-th gas storage container connected to the gas supply pipeline, and obtain the third pressure, where i is an integer greater than or equal to 1 and less than or equal to N-1; compare the first pressure and the third pressure, and if the difference between the third pressure and the first pressure is greater than or equal to a preset threshold, then the first valve 30 corresponding to the i-th gas storage container is determined to be an abnormally closed valve.

[0084] In the above embodiment, the i-th gas storage container is any one of the N-1 gas storage containers 20. After each pair of N-1 gas storage containers 20 is tested, the same steps are used to test the next gas storage container 20, so that the abnormal shutdown detection of all gas storage containers 20 can be completed quickly.

[0085] Furthermore, to achieve continuous abnormal closure detection of multiple gas storage containers 20 and avoid the phenomenon that detecting a single abnormally closed gas storage container 20 would cause the pressure at the gas supply line 10 to rise and affect the detection of subsequent gas storage containers 20, after closing the first valve 30 on the nth gas storage container and before opening the first valve 30 on the (n+1)th gas storage container, detecting the pressure of the (n+1)th gas storage container connected to the gas supply line 10, and obtaining the third pressure, the first pressure and the second pressure can be compared. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, the exhaust mechanism is triggered to restore the gas supply line 10 to the first pressure.

[0086] Before performing an abnormal shutdown detection on the (n+1)th gas storage container, the pressure at the gas supply line 10 is restored to the first pressure. If the (n+1)th gas storage container does not experience an abnormal shutdown, its third pressure after connecting to the gas supply line 10 will be approximately equal to the first pressure. This avoids the phenomenon that the pressure at the gas supply line 10 increases during the detection of the preceding gas storage container 20, thus affecting the detection of subsequent gas storage containers 20.

[0087] Furthermore, to facilitate the discharge of excess gas, please refer to... Figure 2 The gas supply line 10 is also provided with an exhaust branch 50, which is provided with an exhaust valve 60. The steps of triggering the exhaust mechanism to restore the gas supply line 10 to the first pressure include: opening the exhaust valve 60 to discharge excess gas through the exhaust branch 50, continuously monitoring the pressure of the gas supply line 10, and closing the exhaust valve 60 to complete the exhaust process when the pressure of the gas supply line 10 drops to the first pressure.

[0088] In some embodiments of this application, such as an embodiment where an exhaust branch 50 is also provided on the gas supply line 10, and an exhaust valve 60 is provided on the exhaust branch 50, please refer to the following. Figure 2 The gas supply system 100 also includes a gas recovery device 70, which is connected to the exhaust branch 50. Before the step of opening the exhaust valve 60 to discharge excess gas through the exhaust branch 50, the abnormal shutdown method of the gas supply system 100 also includes detecting the pressure of the gas recovery device 70 to obtain a fourth pressure; comparing the fourth pressure with the second pressure; if the second pressure is greater than the fourth pressure, then triggering the step of opening the exhaust valve 60 to discharge excess gas through the exhaust branch 50.

[0089] In the above embodiment, the fourth pressure is obtained by detecting the pressure of the gas recovery device 70, and the fourth pressure is compared with the second pressure. When the second pressure is greater than the fourth pressure, the exhaust valve 60 is opened to discharge gas into the gas recovery device 70, so as to avoid the phenomenon that the gas in the gas supply pipeline 10 cannot enter the gas recovery device 70 due to excessive pressure inside the gas recovery device 70.

[0090] As another embodiment of continuously detecting abnormal shutdown of multiple gas storage containers 20, see [reference]. Figure 5 , Figure 5 This paper illustrates another flowchart of the continuous monitoring of the gas supply system 100 in an embodiment of this application, wherein the continuous monitoring of the gas supply system 100 includes:

[0091] Step S401: Close the first valve 30 on the nth gas storage container and open the first valve 30 on the (n+1)th gas storage container. Detect the pressure of the (n+1)th gas storage container connected to the gas supply pipeline 10 and obtain the measured pressure.

[0092] Step S402: Based on the first pressure, the second pressure, the volume of the gas supply pipeline 10, and the volume of the (n+1)th gas storage container, calculate the expected pressure after connecting the (n+1)th gas storage container to the gas supply pipeline 10, assuming the (n+1)th gas storage container is at the first pressure.

[0093] Step S403: Compare the measured pressure with the expected pressure. If the difference between the measured pressure and the expected pressure is greater than or equal to a preset threshold, then determine that the first valve 30 corresponding to the (n+1)th gas storage container is an abnormally closed valve.

[0094] In the above embodiments, the measured pressure refers to the pressure actually measured after the (n+1)th gas storage container is connected to the gas supply pipeline 10, and the expected pressure refers to the pressure value calculated after the (n+1)th gas storage container is connected to the gas supply pipeline 10 under the assumption that the (n+1)th gas storage container is at the first pressure. The former is the actual value, and the latter is the estimated value. Under the condition that the (n+1)th gas storage container is normally closed, the expected pressure is approximately equal to the measured pressure.

[0095] When the (n+1)th gas storage container is abnormally closed, its actual pressure is higher than the first pressure. Therefore, the measured pressure will be higher than the expected pressure under the assumption that the (n+1)th gas storage container is at the first pressure. Thus, the measured pressure can be compared with the expected pressure. If the difference between the measured pressure and the expected pressure is greater than or equal to the preset threshold, the first valve 30 corresponding to the (n+1)th gas storage container is determined to be an abnormally closed valve. This achieves the goal of detecting the abnormal closure of the (n+1)th gas storage container without venting and considering the pressure change of the gas supply pipeline 10.

[0096] Specifically, based on the first pressure, the second pressure, the volume of the gas supply pipeline 10, and the volume of the (n+1)th gas storage container, the desired pressure can be calculated using the following formula:

[0097] P0 = (P1*V1 + P2*V2) / (V1 + V2)

[0098] Wherein, P0 is the desired pressure, P1 is the first pressure, P2 is the second pressure, V1 is the volume of the (n+1)th gas storage container, and V2 is the volume of the gas supply pipeline.

[0099] Furthermore, since the temperatures are essentially equal at this point, the pressure P0 can be roughly estimated.

[0100] Generally, in the above embodiments, it is necessary to ensure the airtightness of all gas storage containers 20 except for the (n+1)th gas storage container during the detection process. Therefore, in this embodiment, it is preferable to use... Figure 2 The gas supply system, because it is equipped with a first valve 30 (which is a bottle-mouth valve) and a switching valve 80 for the same gas storage container 20, ensures that when the first valve 30 corresponding to the (n+1)th gas storage container is opened due to an abnormality detection, the switching valves 80 of other gas storage containers 20 are closed. If the (n+1)th gas storage container is abnormally closed, its higher-pressure gas will not directly fill other gas storage containers 20 simply because the first valve 30 is a bottle-mouth valve. Those skilled in the art will understand that the first valve 30 can also be a valve that prohibits both gas input and output when closed.

[0101] It is worth noting that the above description of the abnormal shutdown detection of the gas supply system 100 is intended to clearly illustrate the implementation process of this application. Under the guidance of this application, those skilled in the art can also make equivalent modifications, such as installing temperature sensors at the gas storage container 20 and the gas supply pipeline 10, and considering the influence of temperature on the pressure of the gas storage container 20 and the gas supply pipeline 10.

[0102] Continue reading Figure 6 , Figure 6 This diagram illustrates a structural block diagram of a gas supply system abnormal shutdown detection device 500 according to an embodiment of this application. The gas supply system 100 includes a gas supply pipeline 10 and N gas storage containers 20. Each gas storage container 20 is equipped with a first valve 30. One end of the gas supply pipeline 10 is connected to the multiple gas storage containers 20, and the other end is equipped with a second valve 40. N is an integer greater than 1. The detection device includes:

[0103] The control unit controls the opening and closing of the first valve 30; the detection unit detects the pressure of the gas supply line 10; and the processing unit performs the following steps: after the gas supply system 100 stops supplying gas and before closing the first valve 30, the detection unit detects the pressure after the gas supply line 10 and the gas storage container 20 are balanced to obtain a first pressure; the control unit closes each first valve 30 and opens the first valve 30 on the nth gas storage container, while the detection unit detects the pressure connected between the nth gas storage container and the gas supply line 10 to obtain a second pressure, where n is an integer greater than or equal to 1 and less than or equal to N; and the processing unit compares the first pressure with the second pressure, and if the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then the first valve 30 corresponding to the nth gas storage container is determined to be an abnormally closed valve.

[0104] Continue reading Figure 7 , Figure 7 A structural block diagram of a vehicle 600 in an embodiment of this application is shown, wherein the vehicle 600 includes a fuel cell 601; an air supply system 100, including an air supply pipeline 10, a plurality of air storage containers 20, each air storage container 20 being provided with a first valve 30, one end of the air supply pipeline 10 being connected to the plurality of air storage containers 20, and the other end being connected to the fuel cell; and an abnormal shutdown detection device 500 for the air supply system as described in any of the above embodiments.

[0105] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be accomplished by instructions, or by instructions controlling related hardware. These instructions can be stored in a storage medium and loaded and executed by a processor.

[0106] Therefore, embodiments of the present invention provide a storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk, or optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the gas supply system abnormal shutdown detection methods provided in the embodiments of the present invention. For example, the computer program loaded by the processor can execute the following steps:

[0107] After the gas supply system 100 stops supplying gas, and before the first valve 30 is closed, the pressure after the gas supply line 10 and the gas storage container 20 are balanced is detected to obtain the first pressure;

[0108] Close each first valve 30 and open the first valve 30 on the nth gas storage container. Detect the pressure of the nth gas storage container connected to the gas supply pipeline 10 to obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N.

[0109] Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then the first valve 30 corresponding to the nth gas storage container is determined to be an abnormally closed valve.

[0110] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0111] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0112] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0113] Accordingly, various aspects of this application may be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The aforementioned hardware or software may be referred to as a "data block," "module," "engine," "unit," "component," or "system." Furthermore, various aspects of this application may be manifested as a computer product located on one or more computer-readable media, the product including computer-readable program code.

[0114] Computer storage media may contain a propagated data signal containing computer program code, for example, on baseband or as part of a carrier wave. This propagated signal may take various forms, including electromagnetic, optical, and suitable combinations thereof. Computer storage media can be any computer-readable medium other than a storage medium, which can be connected to an instruction execution system, apparatus, or device to enable communication, propagation, or transmission of a program for use. The program code located on the computer storage medium can be propagated through any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0115] The computer program code required for the operation of each part of this application can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc., conventional procedural programming languages ​​such as C, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby, and Groovy, or other programming languages. This program code can run entirely on the user's computer, or as a standalone software package on the user's computer, or partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can be connected to the user's computer through any network, such as a local area network (LAN) or wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as Software as a Service (SaaS).

[0116] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0117] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0118] The above provides a detailed description of a gas supply system abnormal shutdown detection method, device, vehicle, and storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for detecting abnormal shutdown of a gas supply system, characterized in that, The gas supply system includes a gas supply pipeline and N gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to multiple gas storage containers, and the other end is used to connect to a gas-consuming device. N is an integer greater than 1. The detection method includes: After the gas supply system stops operating and before the first valve is closed, the pressure after the gas supply pipeline and the N gas storage containers are balanced is detected to obtain the first pressure; Close each of the first valves and open the first valve on the nth gas storage container, detect the pressure of the nth gas storage container connected to the gas supply pipeline, and obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N; Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the nth gas storage container is an abnormally closed valve. Close the first valve on the nth gas storage container and open the first valve on the (n+1)th gas storage container. Detect the pressure in the (n+1)th gas storage container connected to the gas supply pipeline to obtain the measured pressure. Based on the first pressure, the second pressure, the volume of the gas supply pipeline, and the volume of the (n+1)th gas storage container, calculate the expected pressure after connecting the (n+1)th gas storage container to the gas supply pipeline, assuming the (n+1)th gas storage container is at the first pressure. Compare the measured pressure with the expected pressure. If the difference between the measured pressure and the expected pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the (n+1)th gas storage container is an abnormally closed valve. Based on the first pressure, the second pressure, the volume of the gas supply pipeline, and the volume of the (n+1)th gas storage container, the desired pressure is calculated according to the following formula: ； in, For the desired pressure, For the first pressure, For the second pressure, Let n be the volume of the (n+1)th gas storage container. The volume of the gas supply pipeline is given.

2. A gas supply system abnormal shutdown detection device, used to execute the gas supply system abnormal shutdown detection method according to claim 1, characterized in that: The gas supply system includes a gas supply pipeline and N gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to the gas storage containers, and the other end is used to connect to a gas-consuming device. N is an integer greater than 1. The detection device includes: Control unit, the control unit being used to control the opening and closing of the first valve; The detection unit is used to detect the pressure of the gas supply pipeline; The processing unit is configured to perform the following steps: After the gas supply system stops operating and before the first valve is closed, the pressure after the gas supply pipeline and the gas storage container are balanced is detected to obtain the first pressure; Close each of the first valves and open the first valve on the nth gas storage container, detect the pressure of the nth gas storage container connected to the gas supply pipeline, and obtain the second pressure, where n is an integer greater than or equal to 1 and less than or equal to N; Compare the first pressure with the second pressure. If the difference between the second pressure and the first pressure is greater than or equal to a preset threshold, then determine that the first valve corresponding to the nth gas storage container is an abnormally closed valve.

3. A vehicle, characterized in that, include: Fuel cells; The gas supply system includes a gas supply pipeline and multiple gas storage containers. Each gas storage container is equipped with a first valve. One end of the gas supply pipeline is connected to the multiple gas storage containers, and the other end is connected to the fuel cell. The gas supply system abnormal shutdown detection device as described in claim 2.

4. A storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the gas supply system abnormal shutdown detection method of claim 1.

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