A detection method and device for a vehicle-mounted hydrogen storage system

Abstract

The application discloses a detection method and device for a vehicle-mounted hydrogen storage system. In a hydrogen refueling process, a vehicle-end hydrogen system pressure increasing rate determined by a vehicle and a station-end hydrogen system pressure increasing rate determined by a hydrogen refueling station are obtained. The vehicle-end hydrogen system pressure increasing rate is used to indicate a system pressure increasing condition evaluated by the vehicle itself, and the station-end hydrogen system pressure increasing rate is used to indicate a system pressure increasing condition evaluated by the station end. Ideally, the evaluation conditions of both ends should be similar or even the same in the same hydrogen refueling process, and a leakage will cause a difference between the two. Therefore, the vehicle-mounted hydrogen storage system is detected based on the hydrogen system pressure increasing rates of both ends, and a detection result for indicating whether the vehicle-mounted hydrogen storage system has a leakage in the hydrogen refueling process is obtained. That is, whether the vehicle-mounted hydrogen storage system has a leakage is detected based on the hydrogen system pressure increasing rates of both the vehicle end and the hydrogen refueling station end in the hydrogen refueling process, so as to ensure the reliability of the vehicle-mounted hydrogen storage system.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a detection method and apparatus for an on-board hydrogen storage system. Background Technology

[0002] With the development of vehicle technology and new energy technology, hydrogen, as a clean energy source, has been applied to hydrogen-powered vehicles, such as hydrogen fuel cell vehicles and hydrogen internal combustion engine vehicles.

[0003] Hydrogen-powered vehicles are equipped with onboard hydrogen storage systems. These systems are devices related to hydrogen refueling, storage, transportation, supply, and control, such as refueling through a hydrogen refueling port and delivering hydrogen to the fuel cell port. Understandably, with continued use, onboard hydrogen storage systems may experience leaks and other problems, affecting refueling safety, hydrogen supply safety, and consequently, vehicle driving safety.

[0004] Therefore, it is evident that proper testing of on-board hydrogen storage systems is crucial for ensuring their reliability and thus guaranteeing safety during subsequent use. Summary of the Invention

[0005] To address the aforementioned technical issues, this application provides a detection method and related apparatus for an on-board hydrogen storage system. During hydrogen refueling, based on the hydrogen system pressurization rates determined at both the vehicle and refueling station ends, the method detects whether there is a leak in the on-board hydrogen storage system. This allows for timely detection of leaks in the on-board hydrogen storage system, ensuring its reliability and better guaranteeing safety during subsequent use.

[0006] The embodiments of this application disclose the following technical solutions:

[0007] On one hand, embodiments of this application provide a detection method for an on-board hydrogen storage system, the method comprising:

[0008] In response to a hydrogen refueling request for a vehicle, the hydrogen refueling machine is controlled to refuel the vehicle's onboard hydrogen storage system;

[0009] During the hydrogen refueling process, the pressure boost rate of the vehicle-side hydrogen system determined by the vehicle and the pressure boost rate of the station-side hydrogen system determined by the hydrogen refueling machine are obtained.

[0010] The on-board hydrogen storage system is tested based on the pressurization rate of the vehicle-side hydrogen system and the pressurization rate of the station-side hydrogen system to obtain test results. The test results are used to indicate whether there is a leak in the on-board hydrogen storage system during the hydrogen refueling process.

[0011] On the other hand, embodiments of this application provide a detection device for an on-board hydrogen storage system, the device comprising a control unit, an acquisition unit, and a detection unit:

[0012] The control unit is configured to control the hydrogen refueling machine to refuel the vehicle's onboard hydrogen storage system in response to a hydrogen refueling request for the vehicle.

[0013] The acquisition unit is used to acquire, during the hydrogen refueling process, the vehicle-side hydrogen system pressurization rate determined by the vehicle and the station-side hydrogen system pressurization rate determined by the hydrogen refueling machine.

[0014] The detection unit is used to detect the on-board hydrogen storage system based on the pressurization rate of the vehicle-side hydrogen system and the pressurization rate of the station-side hydrogen system, and obtain the detection result. The detection result is used to indicate whether there is a leak in the on-board hydrogen storage system during the hydrogen refueling process.

[0015] As can be seen from the above technical solution, in response to a hydrogen refueling request from a vehicle, the system controls the hydrogen refueling machine to refuel the vehicle's onboard hydrogen storage system. During the refueling process, it acquires both the vehicle-side hydrogen system pressurization rate determined by the vehicle and the station-side hydrogen system pressurization rate determined by the refueling machine. The hydrogen system pressurization rate indicates the rate of pressure increase in the onboard hydrogen storage system during refueling, reflecting the instantaneous refueling rate. The vehicle-side hydrogen system pressurization rate, determined by the vehicle, indicates the rate of pressure increase assessed by the vehicle itself during refueling. The station-side hydrogen system pressurization rate, determined by the refueling machine, indicates the rate of pressure increase assessed by the refueling station. Ideally, for the same refueling process, the rates of system pressure increase assessed by both the vehicle and the refueling station should be approximately the same. However, a leak in the onboard hydrogen storage system will cause a significant difference between the two rates. Therefore, the on-board hydrogen storage system can be tested based on the pressurization rates of the hydrogen systems at both the vehicle and refueling stations, yielding detection results that indicate whether leaks exist during hydrogen refueling. It is evident that by detecting leaks in the on-board hydrogen storage system based on the pressurization rates determined at both the vehicle and refueling station ends during hydrogen refueling, leaks can be identified promptly, ensuring the reliability of the on-board hydrogen storage system and better guaranteeing safety during subsequent use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating a detection method for an on-board hydrogen storage system provided in this application embodiment;

[0018] Figure 2 This is a structural diagram of a detection device for an on-board hydrogen storage system provided in an embodiment of this application. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present 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 application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0020] The detection method for the on-board hydrogen storage system provided in this application can be implemented using computer equipment, which can be a terminal device or a server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. Terminal devices include, but are not limited to, mobile phones, computers, smart voice interaction devices, smart home appliances, and on-board terminals. The terminal devices and servers can be directly or indirectly connected via wired or wireless communication, and this application does not impose any limitations in this regard.

[0021] The following examples illustrate this in detail:

[0022] Figure 1 A flowchart illustrating a detection method for an on-board hydrogen storage system provided in this application embodiment, using a server as an example of the aforementioned computer device, describes the method, which includes steps S101-S103:

[0023] S101: In response to a hydrogen refueling request for a vehicle, control the hydrogen refueling machine to refuel the vehicle's onboard hydrogen storage system.

[0024] Among them, the vehicle can refer to a hydrogen-powered vehicle with an on-board hydrogen storage system. The on-board hydrogen storage system refers to the device related to hydrogen refueling, storage, transportation, supply and control, in which the stored hydrogen can provide power to the vehicle to meet the vehicle's driving needs.

[0025] In response to a hydrogen refueling request for a vehicle, indicating the need for hydrogen refueling, the hydrogen refueling machine can be controlled to refuel the vehicle's on-board hydrogen storage system, storing the hydrogen in the on-board hydrogen storage system, specifically in the hydrogen cylinder within the on-board hydrogen storage system.

[0026] To ensure the safety of hydrogen refueling, in one possible implementation, before refueling begins, the vehicle's overall safety status signal and the system status signal of the vehicle's onboard hydrogen storage system can be acquired. The vehicle's overall safety status signal focuses on the vehicle as a whole and can be used to indicate the vehicle's status, while the system status signal focuses on the onboard hydrogen storage system and can be used to indicate the status of the onboard hydrogen storage system.

[0027] Furthermore, the hydrogen refueling conditions can be used to indicate the status of the vehicle and the on-board hydrogen storage system when hydrogen refueling can be safely performed. If the vehicle safety status signal indicates that the vehicle's status meets the hydrogen refueling conditions, and the system status signal indicates that the on-board hydrogen storage system's status meets the hydrogen refueling conditions, it means that hydrogen refueling is currently safe, and therefore hydrogen can be refueled into the on-board hydrogen storage system.

[0028] Therefore, before refueling, the status of both the vehicle and the on-board hydrogen storage system is checked. Only when both meet the conditions for hydrogen refueling can hydrogen refueling begin, ensuring the safety of hydrogen refueling.

[0029] Furthermore, during hydrogen refueling, the vehicle's condition and the onboard hydrogen storage system's condition can be continuously monitored. If the detected condition does not meet the hydrogen refueling requirements, it indicates that other abnormalities have occurred during the refueling process, rendering the current condition unsuitable for safe hydrogen refueling. Continuing refueling may pose a safety risk, therefore hydrogen refueling must be stopped. The detected condition not meeting the hydrogen refueling requirements includes at least one of the following: the vehicle's condition not meeting the hydrogen refueling requirements, or the onboard hydrogen storage system's condition not meeting the hydrogen refueling requirements.

[0030] Therefore, the status is checked before refueling begins, and hydrogen refueling only starts if the conditions for hydrogen refueling are met. The status is also continuously monitored during refueling, and hydrogen refueling is stopped if the conditions for hydrogen refueling are not met. This improves the safety of hydrogen refueling throughout the entire process.

[0031] It should be noted that this application does not impose any limitations on the settings for vehicle safety status signals, system status signals, and hydrogen refueling conditions. For ease of understanding, the embodiments of this application provide the following examples:

[0032] In one possible implementation, the vehicle safety status signals include at least one of the following: vehicle speed signal, accelerator pedal signal, drive motor status signal, vehicle power-off status signal, handbrake signal, gear position signal, and battery charge signal. Based on this, the vehicle's condition can be comprehensively considered to assess whether the vehicle currently meets the conditions for safe hydrogen refueling, thus ensuring hydrogen refueling safety.

[0033] In practical applications, some scenarios require the vehicle to be powered off before hydrogen refueling. The aforementioned battery charge signal can be used to indicate the remaining charge of the vehicle's battery, providing power during hydrogen refueling when the vehicle is powered off. To ensure uninterrupted power supply and prevent battery depletion during hydrogen refueling, in one possible implementation, if the vehicle safety status signal includes the vehicle's battery charge signal, the hydrogen refueling condition indicates that before starting hydrogen refueling, the battery charge signal is greater than or equal to a first charge threshold, and during hydrogen refueling, the battery charge signal is greater than or equal to a second charge threshold, where the first charge threshold is greater than the second charge threshold. Based on this, before starting hydrogen refueling, the remaining battery charge exceeds the first charge threshold (e.g., 50%), indicating sufficient charge for hydrogen refueling to ensure uninterrupted power supply. Simultaneously, during hydrogen refueling, the remaining battery charge needs to exceed the second charge threshold (e.g., 10%) to avoid the battery becoming too low due to the power consumption of hydrogen refueling, thus preventing battery depletion and its impact on battery life.

[0034] In addition, the vehicle safety status signal may also include the vehicle's operating mode, the vehicle's charging gun connection status, etc. For ease of understanding, the embodiments of this application illustrate the vehicle safety status signal using Table 1 below:

[0035] Table 1. Examples of vehicle safety status signals

[0036]

[0037]

[0038] In one possible implementation, the system status signal may include at least one of the following: system pressure signal of the on-board hydrogen storage system, system temperature signal of the on-board hydrogen storage system, sensor fault signal of the on-board hydrogen storage system, and system leakage signal of the on-board hydrogen storage system.

[0039] In practical applications, if the system pressure signal indicates no overpressure (e.g., system pressure not exceeding the first pressure threshold) and no underpressure (e.g., system pressure not falling below the second pressure threshold), then the system pressure is considered to meet the hydrogen addition conditions. Similarly, if the system temperature signal indicates no overtemperature (e.g., system temperature not exceeding the temperature threshold), then the system temperature is considered to meet the hydrogen addition conditions. Furthermore, if sensor fault signals indicate that all sensors are faulty, then the hydrogen addition conditions are met. These sensors include hydrogen concentration sensors, system pressure sensors, and system temperature sensors. The system pressure sensor is used to detect system pressure to determine if the system pressure is overpressure or underpressure, and the system temperature sensor is used to detect system temperature to determine if the system temperature meets the hydrogen addition conditions.

[0040] S102: During the hydrogen refueling process, obtain the vehicle-side hydrogen system pressurization rate determined by the vehicle, and obtain the station-side hydrogen system pressurization rate determined by the hydrogen refueling machine.

[0041] S103: Based on the pressurization rate of the vehicle-side hydrogen system and the pressurization rate of the station-side hydrogen system, the on-board hydrogen storage system is tested, and the test results are obtained.

[0042] The hydrogen system pressurization rate can be used to indicate the rate at which the system pressure of the on-board hydrogen storage system increases during the hydrogen refueling process, reflecting the instantaneous hydrogen refueling rate. The vehicle-side hydrogen system pressurization rate is determined by the vehicle and is used to indicate the rate at which the system pressure increases during the hydrogen refueling process as assessed by the vehicle itself. The station-side hydrogen system pressurization rate is determined by the hydrogen refueling machine and is used to indicate the rate at which the system pressure increases during the hydrogen refueling process as assessed by the hydrogen refueling station.

[0043] Under ideal conditions, it's understandable that the rate of system pressure increase assessed at both the vehicle and refueling station should be roughly the same, or even identical, during the same hydrogen refueling process. However, a leak in the onboard hydrogen storage system will cause a significant difference between the two. Therefore, the onboard hydrogen storage system can be tested based on the pressurization rates at both the vehicle and refueling station levels. The test results can then be used to indicate whether a leak exists in the onboard hydrogen storage system during the refueling process.

[0044] It is evident that during hydrogen refueling, the presence of leaks in the on-board hydrogen storage system can be detected based on the pressurization rates of the hydrogen system determined at both the vehicle and refueling station ends. This allows for the timely detection of leaks in the on-board hydrogen storage system, ensuring its reliability and better guaranteeing safety during subsequent use.

[0045] The pressure ramp rate (PRR) of the hydrogen system reflects the instantaneous hydrogen refueling rate, and its unit can be MPa / min. For the vehicle-side PRR, it can be determined using the following formula:

[0046] PRR=dP / dt

[0047] In the above formula, P can be used to represent the system pressure of the on-board hydrogen storage system, and t can be used to represent time. PRR can indicate the rate of pressure increase of the on-board hydrogen storage system at a certain moment during the hydrogen refueling process, reflecting the instantaneous hydrogen refueling rate.

[0048] In practical applications, hydrogen refueling stations are usually equipped with flow meters, pressure gauges, etc., so the relevant parameters during the hydrogen refueling process can be detected based on the configuration of the hydrogen refueling station to calculate the corresponding PRR.

[0049] Understandably, if the detection results indicate a leak, hydrogen refueling will be stopped, and a leak warning message will be generated. The leak warning message is used to indicate that there is a leak in the on-board hydrogen storage system during the hydrogen refueling process, so that relevant users can carry out maintenance in a timely manner.

[0050] It should be noted that this application does not impose any limitations on the method for testing the on-board hydrogen storage system based on the pressurization rates of the vehicle-side hydrogen system and the station-side hydrogen system. For ease of understanding, the following embodiments are provided as examples:

[0051] Ideally, for the same hydrogen refueling process, the rate of system pressure increase assessed at both the vehicle and refueling station should be roughly the same, or even identical. Therefore, in one possible implementation, the difference between the two rates can be used to detect leaks. For example, if the difference between the vehicle-side and refueling station-side hydrogen system pressurization rates exceeds a preset threshold, the difference is considered excessive, indicating a leak. If the difference is less than or equal to the preset threshold, the difference is considered within an acceptable range, and therefore, no leak is assumed. However, considering that the connection between the hydrogen dispenser and the vehicle's refueling port may not be completely sealed, a small amount of leakage may occur. Therefore, the preset threshold can be determined based on this.

[0052] As can be seen from the above technical solution, in response to a hydrogen refueling request from a vehicle, the system controls the hydrogen refueling machine to refuel the vehicle's onboard hydrogen storage system. During the refueling process, it acquires both the vehicle-side hydrogen system pressurization rate determined by the vehicle and the station-side hydrogen system pressurization rate determined by the refueling machine. The hydrogen system pressurization rate indicates the rate of pressure increase in the onboard hydrogen storage system during refueling, reflecting the instantaneous refueling rate. The vehicle-side hydrogen system pressurization rate, determined by the vehicle, indicates the rate of pressure increase assessed by the vehicle itself during refueling. The station-side hydrogen system pressurization rate, determined by the refueling machine, indicates the rate of pressure increase assessed by the refueling station. Ideally, for the same refueling process, the rates of system pressure increase assessed by both the vehicle and the refueling station should be approximately the same. However, a leak in the onboard hydrogen storage system will cause a significant difference between the two rates. Therefore, the on-board hydrogen storage system can be tested based on the pressurization rates of the hydrogen systems at both the vehicle and refueling stations, yielding detection results that indicate whether leaks exist during hydrogen refueling. It is evident that by detecting leaks in the on-board hydrogen storage system based on the pressurization rates determined at both the vehicle and refueling station ends during hydrogen refueling, leaks can be identified promptly, ensuring the reliability of the on-board hydrogen storage system and better guaranteeing safety during subsequent use.

[0053] To ensure hydrogen refueling safety, another possible approach is to monitor the lifespan of the on-board hydrogen storage system to mitigate potential risks from issues such as wear and tear during continuous use. In practice, this can be achieved by acquiring the first and second system pressures of the on-board hydrogen storage system and determining the effective number of refueling cycles based on the pressure difference between them.

[0054] The first system pressure indicates the system pressure of the on-board hydrogen storage system before hydrogen refueling, while the second system pressure indicates the system pressure after refueling. The pressure difference between the two indicates the system pressure increase for that refueling. It's understood that the on-board hydrogen storage system has an upper limit on its storage capacity; as the stored hydrogen increases, the system pressure rises. Therefore, the system pressure increase for each refueling indicates the amount of hydrogen added. The amount of hydrogen stored affects subsequent usage time and the next refueling, thus determining the effective number of refueling cycles for the on-board hydrogen storage system. The effective number of refueling cycles indicates the number of times the on-board hydrogen storage system can be used to assess its lifespan. Monitoring this can help avoid potential risks caused by wear and tear during continuous use.

[0055] In one possible implementation, if the effective number of hydrogen refueling cycles exceeds a threshold, it indicates that the system has been continuously cycled many times. At this point, a lifespan warning message can be generated for the on-board hydrogen storage system. This warning message can indicate that the on-board hydrogen storage system has reached its fatigue cycle count. This suggests a potential safety risk to the on-board hydrogen storage system, such as leakage due to wear and tear on the hydrogen cylinder caused by prolonged and repeated use.

[0056] It should be noted that this application does not impose any limitations on how to determine the effective number of hydrogen additions based on the pressure difference between the first system pressure and the second system pressure. For ease of understanding, the following embodiments of this application are provided as examples:

[0057] In practical applications, different on-board hydrogen storage systems have different hydrogen system pressure ratings, resulting in varying upper limits of system pressure when fully filled with hydrogen. This, in turn, affects the usable time after a single refueling, indicating the need for frequent refueling and impacting the system's lifespan. Therefore, one possible approach is to first obtain the hydrogen system pressure rating parameter for the on-board hydrogen storage system. This parameter indicates the upper limit of system pressure when the system is fully filled. Commonly, the hydrogen system pressure rating parameter can be 35 MPa or 70 MPa.

[0058] Accordingly, when determining the effective number of hydrogen refueling cycles, the effective refueling value for each cycle can be determined based on the pressure difference between the first and second system pressures, as well as the hydrogen system pressure rating parameters. Then, based on this effective refueling value, the corresponding effective number of hydrogen refueling cycles for the on-board hydrogen storage system can be determined. Specifically, the effective refueling value determined after comprehensively considering the hydrogen system pressure rating parameters indicates the amount of hydrogen refueled relative to the on-board hydrogen storage system's storage capacity. In practical applications, hydrogen is not always refueled only when the hydrogen is completely depleted. For an on-board hydrogen storage system, the period from full storage to depletion can be considered a complete usage cycle. Therefore, determining the effective refueling value based on the hydrogen system pressure rating parameters, and then determining the effective number of hydrogen refueling cycles, more accurately reflects the system's lifespan.

[0059] In practice, the ratio of the pressure difference to the hydrogen system's pressure rating parameter can be determined as the effective refueling value for that specific refueling operation. Based on this, the effective refueling value indicates the contribution of each refueling to a complete use of the on-board hydrogen storage system. Typically, hydrogen isn't always used up before refueling, so the effective refueling value is usually less than 1. However, there are cases where hydrogen is used up before refueling, in which case the effective refueling value can be 1. Next, multiple effective refueling values ​​can be accumulated and summed, and the number of effective refueling operations can be determined based on the accumulated sum. Based on this, the lifespan of the on-board hydrogen storage system can be more accurately assessed from the perspective of a complete use of the system.

[0060] In practical applications, the lifespan of an on-board hydrogen storage system can be assessed based on the number of effective hydrogen refueling cycles. Specifically, this can be used to assess the lifespan of the hydrogen cylinders within the system. Therefore, the condition of the hydrogen cylinders can be evaluated based on the number of effective hydrogen refueling cycles, providing a basis for random inspections. For example, hydrogen cylinders with a high number of effective hydrogen refueling cycles can be randomly inspected for maintenance. In actual implementation, the number of effective hydrogen refueling cycles can also be transmitted in real time to relevant regulatory platforms to achieve standardized management of the hydrogen cylinder refueling cycle life.

[0061] It should be noted that this application does not impose any limitations on how to determine the effective number of hydrogen additions based on the cumulative summation results. For ease of understanding, the following embodiments of this application are provided as examples:

[0062] In one possible implementation, the cumulative sum can be rounded down, and the rounded result can be used as the effective number of hydrogen additions. Alternatively, the rounded result can be incremented by one before being used as the effective number of hydrogen additions. This improves the speed of calculating the effective number of hydrogen additions.

[0063] To better understand, based on the foregoing embodiments, this application provides the following formula for determining the effective number of hydrogenation additions:

[0064] N = int(∑n i )+1

[0065] In the above formula, N represents the effective number of hydrogen additions, and n i This is used to represent the valid refueling value corresponding to the i-th hydrogen refueling operation. The integer part can be used to represent rounding.

[0066] Where, n i It can be determined using the following formula:

[0067]

[0068] In the above formula, ΔP is used to represent the aforementioned pressure difference, and P0 is used to represent the aforementioned hydrogen system pressure level parameter, such as 35MPa or 70MPa.

[0069] Therefore, for a 35MPa scenario, a complete use cycle is defined as the voltage drop from 0 to 35MPa, and this is recorded as one lifetime cycle loss. For a 70MPa scenario, a complete use cycle is defined as the voltage drop from 0 to 70MPa, and this is recorded as one lifetime cycle loss.

[0070] To ensure the safety of hydrogen refueling, another possible implementation involves detecting the hydrogen fill rate of the onboard hydrogen storage system during the refueling process. If the detected hydrogen fill rate is greater than or equal to a preset fill rate threshold, the hydrogen refueling process is terminated.

[0071] Hydrogen State of Charge (H2SOC) refers to the ratio of the current hydrogen storage level in an onboard hydrogen storage system to its total storage capacity, thus providing a direct indication of the hydrogen storage level. Based on this, the hydrogen refueling status can be visually monitored. When the hydrogen state of charge is greater than or equal to a preset threshold (e.g., 100%), it indicates that the system is full, and refueling is terminated. It is understandable that if the hydrogen state of charge is detected to be greater than 100%, proactive leakage can be initiated to prevent overcharging and potential hazards.

[0072] In practical applications, H2SOC can be the ratio of the density of hydrogen in the storage tank at the current pressure and temperature to the density of hydrogen at the rated operating pressure (NWP) and standard temperature of 15°C, which can be expressed as a percentage.

[0073] To ensure hydrogen refueling safety, another possible implementation involves monitoring the changing trends of hydrogen parameters in the onboard hydrogen storage system during the refueling process. These parameters indicate the characteristics of the hydrogen stored in the system, reflecting changes in the hydrogen levels during refueling. If the hydrogen parameters remain unchanged for an extended period, it indicates that the hydrogen levels in the onboard system have not changed, suggesting that no hydrogen may have been added. In this case, refueling should be stopped. Therefore, monitoring the hydrogen levels during refueling ensures the effective addition of hydrogen to the system.

[0074] It is understandable that as hydrogen is continuously added to the on-board hydrogen storage system, the amount of hydrogen stored in the system should increase, its mass should increase, and the system pressure should also rise. Therefore, in one possible implementation, the aforementioned hydrogen parameters can be used to indicate the mass characteristics of the hydrogen stored in the on-board hydrogen storage system, or the hydrogen parameters can be used to indicate the pressure characteristics of the hydrogen stored in the on-board hydrogen storage system. Based on this, by detecting the trend of changes in the mass or pressure of hydrogen during the hydrogen refueling process, the status of the hydrogen stored in the system during the hydrogen refueling process can be monitored.

[0075] It is understood that this basically corresponds to the method embodiment, so relevant details can be found in the description of the method embodiment.

[0076] Figure 2 This is a structural diagram of a detection device for an on-board hydrogen storage system provided in an embodiment of this application. The device includes a control unit 201, an acquisition unit 202, and a detection unit 203.

[0077] The control unit 201 is used to control the hydrogen refueling machine to refuel the vehicle's on-board hydrogen storage system in response to a hydrogen refueling request for the vehicle.

[0078] The acquisition unit 202 is used to acquire, during the hydrogen refueling process, the pressure boosting rate of the vehicle-side hydrogen system determined by the vehicle and the pressure boosting rate of the station-side hydrogen system determined by the hydrogen refueling machine.

[0079] The detection unit 203 is used to detect the on-board hydrogen storage system based on the pressurization rate of the vehicle-end hydrogen system and the pressurization rate of the station-end hydrogen system, and obtain the detection result. The detection result is used to indicate whether there is a leak in the on-board hydrogen storage system during the hydrogen refueling process.

[0080] In one possible implementation, the acquisition unit is further configured to:

[0081] The first system pressure and the second system pressure corresponding to the on-board hydrogen storage system are obtained. The first system pressure is used to indicate the system pressure of the on-board hydrogen storage system before hydrogen refueling, and the second system pressure is used to indicate the system pressure of the on-board hydrogen storage system after hydrogen refueling is completed.

[0082] The effective number of hydrogen refueling cycles corresponding to the on-board hydrogen storage system is determined based on the pressure difference between the first system pressure and the second system pressure, and the pressure difference is used to indicate the system pressure increase corresponding to the current hydrogen refueling.

[0083] In one possible implementation, the acquisition unit is further configured to:

[0084] Obtain the hydrogen system pressure level parameter corresponding to the on-board hydrogen storage system. The hydrogen system pressure level parameter is used to indicate the upper limit of the system pressure when the on-board hydrogen storage system is full of hydrogen.

[0085] The effective refueling value for this operation is determined based on the pressure difference between the first system pressure and the second system pressure, as well as the hydrogen system pressure level parameters.

[0086] Based on the effective refueling value for that particular refueling, the number of effective hydrogen refueling cycles corresponding to the on-board hydrogen storage system is determined.

[0087] In one possible implementation, the acquisition unit is further configured to:

[0088] The ratio of the pressure difference to the hydrogen system pressure level parameter is determined as the effective refueling value for that current operation.

[0089] The effective hydrogen refueling times are determined by summing up the multiple effective refueling values ​​for each current refueling and by determining the effective hydrogen refueling times based on the summation result.

[0090] In one possible implementation, the apparatus further includes a generation unit:

[0091] The generation unit is used to generate a lifespan warning message for the on-board hydrogen storage system if the effective hydrogen refueling number is greater than the number threshold. The lifespan warning message is used to indicate that the on-board hydrogen storage system has reached the fatigue cycle number.

[0092] In one possible implementation, the detection unit is further configured to:

[0093] During the hydrogen refueling process, the hydrogen filling rate of the on-board hydrogen storage system is detected.

[0094] If the detected hydrogen filling rate is greater than or equal to a preset filling rate threshold, hydrogen refueling will end.

[0095] In one possible implementation, the detection unit is further configured to:

[0096] During the hydrogen refueling process, the changing trend of hydrogen parameters corresponding to the on-board hydrogen storage system is detected. These hydrogen parameters are used to indicate the characteristics of the hydrogen stored in the on-board hydrogen storage system.

[0097] If the trend of the hydrogen parameters indicates that the hydrogen parameters remain unchanged for a period of time exceeding a preset time, hydrogen refueling will be stopped.

[0098] In one possible implementation, the hydrogen parameter is used to indicate the quality characteristics of the hydrogen stored in the on-board hydrogen storage system, or the hydrogen parameter is used to indicate the pressure characteristics of the hydrogen stored in the on-board hydrogen storage system.

[0099] In one possible implementation, the generating unit is further configured to:

[0100] If the detection result indicates a leak, hydrogen refueling is stopped, and a leak warning message is generated. The leak warning message is used to indicate that there is a leak in the on-board hydrogen storage system during the hydrogen refueling process.

[0101] As can be seen from the above technical solution, in response to a hydrogen refueling request from a vehicle, the system controls the hydrogen refueling machine to refuel the vehicle's onboard hydrogen storage system. During the refueling process, it acquires both the vehicle-side hydrogen system pressurization rate determined by the vehicle and the station-side hydrogen system pressurization rate determined by the refueling machine. The hydrogen system pressurization rate indicates the rate of pressure increase in the onboard hydrogen storage system during refueling, reflecting the instantaneous refueling rate. The vehicle-side hydrogen system pressurization rate, determined by the vehicle, indicates the rate of pressure increase assessed by the vehicle itself during refueling. The station-side hydrogen system pressurization rate, determined by the refueling machine, indicates the rate of pressure increase assessed by the refueling station. Ideally, for the same refueling process, the rates of system pressure increase assessed by both the vehicle and the refueling station should be approximately the same. However, a leak in the onboard hydrogen storage system will cause a significant difference between the two rates. Therefore, the on-board hydrogen storage system can be tested based on the pressurization rates of the hydrogen systems at both the vehicle and refueling stations, yielding detection results that indicate whether leaks exist during hydrogen refueling. It is evident that by detecting leaks in the on-board hydrogen storage system based on the pressurization rates determined at both the vehicle and refueling station ends during hydrogen refueling, leaks can be identified promptly, ensuring the reliability of the on-board hydrogen storage system and better guaranteeing safety during subsequent use.

[0102] In another aspect, embodiments of this application provide a computer device, the computer device including a processor and a memory:

[0103] The memory is used to store program code and transmit the program code to the processor;

[0104] The processor is used to execute the detection method of the on-board hydrogen storage system provided in the above embodiments according to the instructions in the program code.

[0105] The computer device may include a terminal device or a server, and the aforementioned detection device for the on-board hydrogen storage system may be configured in the computer device.

[0106] In another aspect, embodiments of this application also provide a storage medium for storing a computer program for executing the detection method of the on-board hydrogen storage system provided in the above embodiments.

[0107] In addition, this application also provides a computer program product including instructions, which, when run on a computer, causes the computer to execute the detection method of the on-board hydrogen storage system provided in the above embodiments.

[0108] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium can be at least one of the following media: read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0109] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0110] It should be noted that, in this document, relational terms such as "first" and "second," if present, are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0111] The foregoing has provided a detailed description of a detection method and apparatus for an on-board hydrogen storage system according to embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the methods of this application. Furthermore, those skilled in the art will recognize that variations in the specific implementation methods and application scope may occur based on the methods of this application.

[0112] In summary, the content of this specification should not be construed as limiting this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. Furthermore, based on the implementation methods provided in the above aspects, this application can be further combined to provide more implementation methods.

Claims

1. A method for detecting a hydrogen storage system for a vehicle, characterized by, The method comprises: in response to a hydrogen refueling request for a vehicle, controlling a hydrogen refueling machine to hydrogen fill a vehicle-mounted hydrogen storage system of the vehicle; during hydrogen filling, obtaining a vehicle-end hydrogen system pressure increasing rate determined by the vehicle, and obtaining a station-end hydrogen system pressure increasing rate determined by the hydrogen refueling machine; based on the vehicle-end hydrogen system pressure increasing rate and the station-end hydrogen system pressure increasing rate, detecting the vehicle-mounted hydrogen storage system to obtain a detection result, the detection result being used to indicate whether the vehicle-mounted hydrogen storage system leaks during hydrogen filling.

2. The method of claim 1, wherein, The method further comprises: obtaining a first system pressure and a second system pressure corresponding to the vehicle-mounted hydrogen storage system, the first system pressure being used to indicate a system pressure of the vehicle-mounted hydrogen storage system before hydrogen filling, and the second system pressure being used to indicate a system pressure of the vehicle-mounted hydrogen storage system after hydrogen filling is completed; based on a pressure difference between the first system pressure and the second system pressure, determining an effective hydrogen refueling number corresponding to the vehicle-mounted hydrogen storage system, the pressure difference being used to indicate a system pressure increase corresponding to a current hydrogen refueling.

3. The method of claim 2, wherein, The method further comprises: obtaining a hydrogen system pressure level parameter corresponding to the vehicle-mounted hydrogen storage system, the hydrogen system pressure level parameter being used to indicate an upper limit of a system pressure corresponding to the vehicle-mounted hydrogen storage system when the vehicle-mounted hydrogen storage system is full of hydrogen; the determination of the effective hydrogen refueling number corresponding to the vehicle-mounted hydrogen storage system based on the pressure difference between the first system pressure and the second system pressure comprises: based on the pressure difference between the first system pressure and the second system pressure and the hydrogen system pressure level parameter, determining a current effective hydrogen filling value; based on the current effective hydrogen filling value, determining the effective hydrogen refueling number corresponding to the vehicle-mounted hydrogen storage system.

4. The method of claim 3, wherein, the determination of the current effective hydrogen filling value based on the pressure difference between the first system pressure and the second system pressure and the hydrogen system pressure level parameter comprises: determining a ratio of the pressure difference to the hydrogen system pressure level parameter as the current effective hydrogen filling value; the determination of the effective hydrogen refueling number corresponding to the vehicle-mounted hydrogen storage system based on the current effective hydrogen filling value comprises: cumulatively summing a plurality of current effective hydrogen filling values, and determining the effective hydrogen refueling number based on a result of the cumulative summation.

5. The method of claim 2, wherein, The method further comprises: if the effective hydrogen refueling number is greater than a number threshold, generating a service life warning prompt information for the vehicle-mounted hydrogen storage system, the service life warning prompt information being used to indicate that the vehicle-mounted hydrogen storage system has reached a fatigue cycle use number.

6. The method of claim 1, wherein, The method further comprises: during hydrogen filling, detecting a hydrogen filling rate corresponding to the vehicle-mounted hydrogen storage system; if the detected hydrogen filling rate is greater than or equal to a preset filling rate threshold, hydrogen filling is completed.

7. The method of claim 1, wherein, The method further comprises: during hydrogen filling, detecting a change trend of a hydrogen parameter corresponding to the vehicle-mounted hydrogen storage system, the hydrogen parameter being used to indicate a characteristic of hydrogen stored in the vehicle-mounted hydrogen storage system; If the variation trend of the hydrogen parameter indicates that the hydrogen parameter remains unchanged for a time period exceeding a preset time period, hydrogen refueling is stopped.

8. The method of claim 7, wherein, The hydrogen parameter is used to indicate a mass characteristic of hydrogen stored in the vehicle-mounted hydrogen storage system, or the hydrogen parameter is used to indicate a pressure characteristic of hydrogen stored in the vehicle-mounted hydrogen storage system.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: If the detection result indicates that there is leakage, hydrogen refueling is stopped, and a leakage prompt information is generated, the leakage prompt information being used to prompt that there is leakage in the vehicle-mounted hydrogen storage system during hydrogen refueling.

10. A detection device for a vehicular hydrogen storage system, characterized by comprising: The device includes a control unit, an acquisition unit and a detection unit: The control unit is used to control a hydrogen refueling machine to perform hydrogen refueling on a vehicle-mounted hydrogen storage system of a vehicle in response to a hydrogen refueling request for the vehicle; The acquisition unit is used to acquire a vehicle-end hydrogen system pressure increasing rate determined by the vehicle and a station-end hydrogen system pressure increasing rate determined by the hydrogen refueling machine during hydrogen refueling; The detection unit is used to detect the vehicle-mounted hydrogen storage system according to the vehicle-end hydrogen system pressure increasing rate and the station-end hydrogen system pressure increasing rate to obtain a detection result, the detection result being used to indicate whether there is leakage in the vehicle-mounted hydrogen storage system during hydrogen refueling.

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