Detection method and device for vehicle-mounted hydrogen storage system

Abstract

The invention discloses a detection method and device for a vehicle-mounted hydrogen storage system, and the method comprises the steps: obtaining 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 adding machine in a hydrogen filling process, and enabling the vehicle-end hydrogen system pressure increasing rate to be used for indicating the system pressure increasing condition evaluated by the vehicle; the station end hydrogen system pressure increasing rate is used for indicating the system pressure increasing condition evaluated by the hydrogen refueling station end. Under ideal conditions, in the same hydrogen filling process, the evaluation conditions at the two ends should be almost even the same, and the two ends can be different due to leakage. Therefore, the vehicle-mounted hydrogen storage system is detected based on the pressure increasing rates of the hydrogen systems at the two ends, and a detection result used for indicating whether leakage exists in the vehicle-mounted hydrogen storage system or not in the hydrogen filling process is obtained. Whether the vehicle-mounted hydrogen storage system leaks or not is detected based on the hydrogen system pressure increasing rates determined by the vehicle end and the hydrogen refueling station end respectively in the hydrogenation process, so that the reliability of the vehicle-mounted hydrogen storage system is ensured.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a detection method and device for a vehicle-mounted hydrogen storage system. Background Art

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

[0003] Hydrogen-powered vehicles are equipped with an onboard hydrogen storage system, which refers to devices related to hydrogen filling, storage, transportation, supply and control, such as hydrogen filling through the hydrogen filling port and hydrogen delivery to the fuel cell port. It is understandable that with continuous use, the onboard hydrogen storage system may leak and other problems, which will affect the safety of hydrogen filling and hydrogen supply, and thus affect the driving safety of the vehicle.

[0004] It can be seen that how to test the on-board hydrogen storage system is of great significance to ensure the reliability of the on-board hydrogen storage system and thus ensure its safety during subsequent use. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the present application provides a detection method and related devices for an on-board hydrogen storage system. During the hydrogen filling process, based on the hydrogen system boost rate determined on both the vehicle side and the hydrogen filling station side, whether there is a leak in the on-board hydrogen storage system is detected. Based on this, leakage problems in the on-board hydrogen storage system can be discovered in time to ensure the reliability of the on-board hydrogen storage system and better guarantee the safety during subsequent use.

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

[0007] On the one hand, an embodiment of the present application provides a method for detecting a vehicle-mounted hydrogen storage system, the method comprising:

[0008] In response to a hydrogen refueling request for a vehicle, controlling a hydrogen refueling machine to refuel an onboard hydrogen storage system of the vehicle with hydrogen;

[0009] During the hydrogen filling process, obtaining a vehicle-end hydrogen system pressure increase rate determined by the vehicle, and obtaining a station-end hydrogen system pressure increase rate determined by the hydrogen filling machine;

[0010] The on-board hydrogen storage system is tested according to the pressure boost rate of the vehicle-end hydrogen system and the pressure boost rate of the station-end hydrogen system to obtain a test result, which is used to indicate whether there is a leak in the on-board hydrogen storage system during hydrogen filling.

[0011] On the other hand, an embodiment of the present application provides a detection device for a vehicle-mounted hydrogen storage system, the device comprising a control unit, an acquisition unit and a detection unit:

[0012] The control unit is used to control the hydrogen filling machine to fill hydrogen into the on-board hydrogen storage system of the vehicle in response to a hydrogen filling request for the vehicle;

[0013] The acquisition unit is used to acquire the vehicle-end hydrogen system pressure increase rate determined by the vehicle and the station-end hydrogen system pressure increase rate determined by the hydrogen filling machine during the hydrogen filling process;

[0014] The detection unit is used to detect the vehicle-mounted hydrogen storage system according to the vehicle-end hydrogen system pressure boosting rate and the station-end hydrogen system pressure boosting rate to obtain a detection result, and the detection result is used to indicate whether there is a leak in the vehicle-mounted hydrogen storage system during hydrogen refueling.

[0015] It can be seen from the above technical solution that in response to the hydrogen refueling request for the vehicle, the hydrogen refueling machine is controlled to refuel the vehicle's onboard hydrogen storage system with hydrogen, and in the process of hydrogen refueling, the vehicle-end hydrogen system pressure increase rate determined by the vehicle is obtained, and the station-end hydrogen system pressure increase rate determined by the hydrogen refueling machine is obtained. Among them, the hydrogen system pressure increase rate can be used to indicate the rate of increase of the system pressure of the on-board hydrogen storage system during the hydrogen refueling process, which can reflect the instantaneous hydrogen refueling rate. The vehicle-end hydrogen system pressure increase rate is determined by the vehicle and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the vehicle itself. The station-end hydrogen system pressure increase rate is determined by the hydrogen refueling machine and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the hydrogen refueling station. It can be understood that, ideally, for the same hydrogen refueling process, the rate of increase of the system pressure evaluated by both the vehicle end and the hydrogen refueling station end should be similar or even the same. When there is a leak in the on-board hydrogen storage system, it will cause a significant difference between the two. Therefore, the on-board hydrogen storage system can be tested based on the vehicle-side hydrogen system pressure boosting rate and the station-side hydrogen system pressure boosting rate to obtain a test result indicating whether there is a leak in the on-board hydrogen storage system during hydrogen refueling. It can be seen that during the hydrogen refueling process, based on the hydrogen system pressure boosting rate determined on both the vehicle side and the hydrogen refueling station side, the on-board hydrogen storage system is tested for leaks. Based on this, leakage problems in the on-board hydrogen storage system can be discovered in a timely manner to ensure the reliability of the on-board hydrogen storage system and better guarantee safety during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A flow chart of a detection method for a vehicle-mounted hydrogen storage system provided in an embodiment of the present application;

[0018] Figure 2 A structural diagram of a detection device for a vehicle-mounted hydrogen storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] The detection method of the vehicle-mounted hydrogen storage system provided in the embodiment of the present application can be implemented by a computer device, which can be a terminal device or a server, wherein the server can be an independent physical server, or 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, intelligent voice interaction devices, smart home appliances, vehicle-mounted terminals, etc. The terminal device and the server can be directly or indirectly connected via wired or wireless communication, and this application does not impose any restrictions on this.

[0021] The specific examples are as follows:

[0022] Figure 1 A flow chart of a detection method for a vehicle-mounted hydrogen storage system provided in an embodiment of the present application is described by taking a server as the aforementioned computer device as an example. The method includes S101-S103:

[0023] S101: In response to a hydrogen refueling request for a vehicle, controlling a hydrogen refueling machine to refuel an onboard hydrogen storage system of the vehicle with hydrogen.

[0024] Among them, the vehicle may refer to a hydrogen-powered vehicle with an on-board hydrogen storage system, and the on-board hydrogen storage system refers to a device related to hydrogen filling, storage, transportation, supply and control, wherein the stored hydrogen can provide energy for the vehicle to meet the driving needs of the vehicle, etc.

[0025] In response to a hydrogen refueling request for the vehicle, indicating that hydrogen refueling is required, the hydrogen refueling machine can be controlled to refuel the vehicle's onboard hydrogen storage system with hydrogen to store the hydrogen in the onboard hydrogen storage system, specifically, it can refer to storing it in a hydrogen cylinder in the onboard hydrogen storage system.

[0026] In order to ensure the safety of hydrogen refueling, in a possible implementation, before starting hydrogen refueling, the vehicle safety status signal corresponding to the vehicle and the system status signal corresponding to the vehicle's onboard hydrogen storage system can also be obtained. Among them, the vehicle safety status signal focuses on the vehicle as a whole and can be used to indicate the status of the vehicle, and 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 condition can be used to indicate the status of the vehicle and the onboard hydrogen storage system when hydrogen refueling can be safely performed. If the vehicle safety status signal indicates that the vehicle status meets the hydrogen refueling condition, and the system status signal indicates that the onboard hydrogen storage system status meets the hydrogen refueling condition, it indicates that hydrogen refueling is currently safe, so hydrogen refueling can be performed to the onboard hydrogen storage system.

[0028] Based on this, before starting to refuel, the status of both the vehicle and the on-board hydrogen storage system are first checked. Only when the status of both meet the hydrogen refueling conditions will hydrogen refueling begin to ensure the safety of hydrogen refueling.

[0029] Furthermore, during the process of hydrogen refueling, the vehicle status and the onboard hydrogen storage system status can continue to be detected. If the detected status does not meet the hydrogen refueling conditions, it indicates that other abnormal conditions have occurred during the hydrogen refueling process, so that the current status no longer meets the conditions for safe hydrogen refueling. If the hydrogen refueling continues, there may be safety risks, so the hydrogen refueling is stopped. Among them, the detected status does not meet the hydrogen refueling conditions includes at least one of the detected vehicle status does not meet the hydrogen refueling conditions and the detected onboard hydrogen storage system status does not meet the hydrogen refueling conditions.

[0030] Based on this, the status is detected before the hydrogenation begins, and hydrogenation begins only when the hydrogenation conditions are met. The status is continuously detected during the hydrogenation process, and hydrogenation is stopped once the hydrogenation conditions are not met. Based on this, it is beneficial to improve the hydrogenation safety during the entire hydrogenation process.

[0031] It should be noted that the present application does not impose any limitation on the setting of the vehicle safety status signal, the system status signal, and the hydrogenation condition. For ease of understanding, the present application provides the following example description:

[0032] In a possible implementation, the vehicle safety status signal includes at least one of the vehicle speed signal, the vehicle accelerator pedal signal, the vehicle drive motor status signal, the vehicle power-off status signal, the vehicle handbrake signal, the vehicle gear position signal, and the vehicle battery power signal. Based on this, the vehicle situation can be comprehensively considered to evaluate whether the vehicle meets the conditions for safe hydrogen refueling at this time to ensure the safety of hydrogen refueling.

[0033] In practical applications, in some scenarios, the vehicle needs to be powered off before hydrogen can be refueled. The above-mentioned battery power signal can be used to indicate the remaining power of the vehicle's battery, and can supply power during the hydrogenation process when the vehicle is powered off. In order to ensure that the hydrogenation process is not disconnected and the battery is not depleted during the hydrogenation process, in a possible implementation, if the vehicle safety status signal includes the battery power signal of the vehicle, the hydrogenation condition is used to indicate that before the start of hydrogen refueling, the battery power signal is greater than or equal to the first power threshold, and during the hydrogenation process, the battery power signal is greater than or equal to the second power threshold, wherein the first power threshold is greater than the second power threshold. Based on this, before the start of hydrogenation, the remaining power of the battery exceeds the first power threshold (such as 50%), indicating that there is enough power for hydrogenation to ensure that the hydrogenation process is not disconnected. At the same time, during the hydrogenation process, the remaining power of the battery needs to exceed the second power threshold (such as 10%) to avoid the remaining power of the battery being too low due to hydrogenation power consumption, resulting in power loss, etc., thereby ensuring that the battery is not depleted during the hydrogenation process and avoiding the impact of power loss on the 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 present application embodiment illustrates the vehicle safety status signal through the following Table 1:

[0035] Table 1. Example table for vehicle safety status signals

[0036]

[0037]

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

[0039] In practical applications, if the system pressure signal indicates that there is no overpressure (such as the system pressure is not higher than the first pressure threshold) or underpressure (such as the system pressure is not lower than the second pressure threshold), then the system pressure is considered to meet the hydrogenation conditions. And if the system temperature signal indicates that there is no overtemperature (such as the system temperature is not higher than the temperature threshold), then it can be considered that the system temperature meets the hydrogenation conditions. And, if the sensor fault signal indicates that all sensors are faulty, then the hydrogenation conditions are met. For example, hydrogen concentration sensor, system pressure sensor, system temperature sensor, etc. Among them, the system pressure sensor can be used to detect the system pressure to determine whether the system pressure is overpressure or underpressure, and the system temperature sensor can be used to detect the system temperature to determine whether the system temperature meets the hydrogenation conditions.

[0040] S102: During the hydrogen filling process, a vehicle-side hydrogen system pressure increase rate determined by the vehicle is obtained, and a station-side hydrogen system pressure increase rate determined by the hydrogen filling machine is obtained.

[0041] S103: According to the vehicle-side hydrogen system pressure boosting rate and the station-side hydrogen system pressure boosting rate, the vehicle-mounted hydrogen storage system is tested to obtain a test result.

[0042] Among them, the hydrogen system pressure boost rate can be used to indicate the rate of increase of the system pressure of the on-board hydrogen storage system during the hydrogen filling process, and can reflect the instantaneous hydrogen filling rate. The vehicle-side hydrogen system pressure boost rate is determined by the vehicle, and is used to indicate the rate of increase of the system pressure during the hydrogen filling process evaluated by the vehicle itself. The station-side hydrogen system pressure boost rate is determined by the hydrogen filling machine, and is used to indicate the rate of increase of the system pressure during the hydrogen filling process evaluated by the hydrogen filling station.

[0043] It is understandable that, ideally, for the same hydrogen refueling process, the rate of increase of system pressure evaluated at both the vehicle end and the hydrogen refueling station end should be similar or even the same. When there is a leak in the on-board hydrogen storage system, there will be a significant difference between the two. Therefore, the on-board hydrogen storage system can be tested based on the vehicle-end hydrogen system pressure increase rate and the station-end hydrogen system pressure increase rate to obtain a test result, which can be used to indicate whether there is a leak in the on-board hydrogen storage system during hydrogen refueling.

[0044] It can be seen that during the hydrogen refueling process, based on the hydrogen system boost rate determined on both the vehicle side and the hydrogen refueling station side, the on-board hydrogen storage system is tested for leaks. Based on this, leakage problems in the on-board hydrogen storage system can be discovered in a timely manner to ensure the reliability of the on-board hydrogen storage system and better ensure safety during subsequent use.

[0045] Among them, the hydrogen system pressure ramp rate (PRR) is used to reflect the instantaneous hydrogenation rate, and the unit can be MPa / min. For the vehicle-side PRR, it can be determined by 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 increase of the pressure 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, for station-side PRR, hydrogen refueling stations are usually equipped with flow meters, pressure gauges, etc. Therefore, the relevant parameters in the hydrogen refueling process can be detected according to the configuration of the hydrogen refueling station to calculate the corresponding PRR.

[0049] It is understandable that if the test results indicate a leak, hydrogen filling is stopped and a leak prompt message is generated. The leak prompt message is used to indicate that there is a leak in the on-board hydrogen storage system during hydrogen filling so that relevant users can perform maintenance in a timely manner.

[0050] It should be noted that this application does not limit the method of detecting the vehicle-mounted hydrogen storage system according to the vehicle-end hydrogen system pressure boosting rate and the station-end hydrogen system pressure boosting rate. For ease of understanding, the embodiments of this application provide the following methods as examples:

[0051] Ideally, for the same hydrogen filling process, the rate of increase of system pressure evaluated at both the vehicle end and the hydrogen filling station end should be similar or even the same. Therefore, in one possible implementation, detection can be performed based on the difference between the two to determine whether there is a leak. For example, if the difference between the boost rate of the hydrogen system at the vehicle end and the boost rate of the hydrogen system at the station end is greater than the preset threshold, it is considered that the difference is too much, and it can be determined that there is a leak. If the difference between the two is less than or equal to the preset threshold, it is considered that the difference is within an allowable range, so it can be considered that there is no leak. Among them, considering that the connection between the hydrogen filling machine and the hydrogen filling port of the vehicle may not be completely sealed, etc., there may be a small leak, so the size of the preset threshold can be determined based on this.

[0052] It can be seen from the above technical solution that in response to the hydrogen refueling request for the vehicle, the hydrogen refueling machine is controlled to refuel the vehicle's onboard hydrogen storage system with hydrogen, and in the process of hydrogen refueling, the vehicle-end hydrogen system pressure increase rate determined by the vehicle is obtained, and the station-end hydrogen system pressure increase rate determined by the hydrogen refueling machine is obtained. Among them, the hydrogen system pressure increase rate can be used to indicate the rate of increase of the system pressure of the on-board hydrogen storage system during the hydrogen refueling process, which can reflect the instantaneous hydrogen refueling rate. The vehicle-end hydrogen system pressure increase rate is determined by the vehicle and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the vehicle itself. The station-end hydrogen system pressure increase rate is determined by the hydrogen refueling machine and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the hydrogen refueling station. It can be understood that, ideally, for the same hydrogen refueling process, the rate of increase of the system pressure evaluated by both the vehicle end and the hydrogen refueling station end should be similar or even the same. When there is a leak in the on-board hydrogen storage system, it will cause a significant difference between the two. Therefore, the on-board hydrogen storage system can be tested based on the vehicle-side hydrogen system pressure boosting rate and the station-side hydrogen system pressure boosting rate to obtain a test result indicating whether there is a leak in the on-board hydrogen storage system during hydrogen refueling. It can be seen that during the hydrogen refueling process, based on the hydrogen system pressure boosting rate determined on both the vehicle side and the hydrogen refueling station side, the on-board hydrogen storage system is tested for leaks. Based on this, leakage problems in the on-board hydrogen storage system can be discovered in a timely manner to ensure the reliability of the on-board hydrogen storage system and better guarantee safety during subsequent use.

[0053] In order to ensure the safety of hydrogen refueling, in another possible implementation, the service life of the on-board hydrogen storage system can also be tested to avoid potential risks such as wear and tear during continuous use. In specific implementation, the first system pressure and the second system pressure corresponding to the on-board hydrogen storage system can be obtained, and the effective number of hydrogen refuelings corresponding to the on-board hydrogen storage system can be determined based on the pressure difference between the first system pressure and the second system pressure.

[0054] Among them, the first system pressure can be used to indicate the system pressure corresponding to the on-board hydrogen storage system before hydrogen filling, and the second system pressure can be used to indicate the system pressure corresponding to the on-board hydrogen storage system after the hydrogen filling is completed. The pressure difference between the two can be used to indicate the system pressure increase corresponding to the current hydrogenation. It can be understood that the hydrogen storage capacity of the on-board hydrogen storage system has an upper limit. As the amount of stored hydrogen increases, the system pressure increases, so the system pressure increase during the current hydrogenation can be used to indicate the amount of hydrogen added at that time. The amount of hydrogen storage affects the subsequent use time and the next hydrogenation, etc., so it can be used to determine the effective number of hydrogenation corresponding to the on-board hydrogen storage system. Among them, the effective number of hydrogenation can be used to indicate the number of cycles of the on-board hydrogen storage system, so it is used to evaluate the service life of the on-board hydrogen storage system. Testing this can avoid potential risks caused by problems such as wear during continuous use.

[0055] In a possible implementation, if the number of effective hydrogenation times is greater than the threshold, it indicates that the hydrogen storage system has been used for many consecutive cycles. At this time, a life warning prompt message for the on-board hydrogen storage system can be generated, and the life warning prompt message can be used to indicate that the on-board hydrogen storage system has reached the fatigue cycle number. At this time, it indicates that the on-board hydrogen storage system may have safety risks, such as leakage risks due to long-term repeated use and wear of hydrogen cylinders.

[0056] It should be noted that the present application does not make any limitation on how to determine the effective number of hydrogenation times based on the pressure difference between the first system pressure and the second system pressure. For ease of understanding, the present application provides the following methods as examples:

[0057] In actual applications, different on-board hydrogen storage systems have different hydrogen system pressure levels, which makes the corresponding upper limit of the system pressure when full of hydrogen different, so that the length of time that can be used after a full refill varies, so it can reflect whether frequent hydrogen refueling is needed, which will affect the service life of the on-board hydrogen storage system. Therefore, in a possible implementation method, the hydrogen system pressure level parameter corresponding to the on-board hydrogen storage system can also be obtained first, where the hydrogen system pressure level parameter can be used to indicate the corresponding upper limit of the system pressure when the on-board hydrogen storage system is full of hydrogen. Commonly, the hydrogen system pressure level parameter can be 35MPa or 70MPa.

[0058] Correspondingly, when determining the effective number of hydrogen refuelings, the effective refueling value can be determined based on the pressure difference between the first system pressure and the second system pressure, and the hydrogen system pressure level parameter, and then the effective number of hydrogen refuelings corresponding to the on-board hydrogen storage system can be determined based on the effective refueling value. Among them, after comprehensively considering the hydrogen system pressure level parameter, the determined effective refueling value can indicate the refueling situation of the current hydrogen refueling amount compared to the hydrogen storage capacity of the on-board hydrogen storage system. In actual applications, hydrogen refueling may not be performed every time the hydrogen is exhausted, and for the on-board hydrogen storage system, from full to exhausted can be considered as a complete use, so the effective refueling value is determined by comprehensively considering the hydrogen system pressure level parameter, and the effective number of hydrogen refuelings determined can more accurately reflect the service life.

[0059] In specific implementation, the ratio of the pressure difference to the pressure level parameter of the hydrogen system can be determined as the effective filling value of the time. Based on this, the effective filling value of the time can indicate the contribution of the hydrogenation of the time to a complete use of the on-board hydrogen storage system. Usually, hydrogenation may not be done every time it is used up, so the effective filling value of the time is usually a number less than 1. Of course, there may be a situation where hydrogenation is not done until it is used up. In this case, the effective filling value of the time can be 1. Then, the multiple effective filling values ​​of the time can be accumulated and summed, and the effective number of hydrogenation can be determined based on the result of the accumulated sum. Based on this, the service life of the on-board hydrogen storage system can be more accurately evaluated from the perspective of a complete use of the on-board hydrogen storage system.

[0060] In practical applications, the service life of the on-board hydrogen storage system can be evaluated based on the effective number of hydrogen refuelings. Specifically, the service life of the hydrogen cylinder in the on-board hydrogen storage system can be evaluated. Therefore, the status of the hydrogen cylinder can be evaluated based on the effective number of hydrogen refuelings, providing a basis for random inspections of hydrogen cylinders. For example, hydrogen cylinders with a high number of effective hydrogen refuelings can be inspected and repaired. In actual implementation, the effective number of hydrogen refuelings can also be transmitted to the relevant supervision platform in real time to achieve standardized management of the hydrogen cylinder refueling cycle life.

[0061] It should be noted that the present application does not impose any limitation on how to determine the effective number of hydrogenation times based on the cumulative summation result. For ease of understanding, the present application provides the following method as an example:

[0062] In a possible implementation, the cumulative summed result may be rounded, and then the rounded result may be determined as the effective hydrogenation number. Of course, one may also be accumulated based on the rounded result and then used as the effective hydrogenation number. Based on this, the rapid calculation of the effective hydrogenation number is improved.

[0063] For better understanding, the present embodiment provides the following formula for determining the effective number of hydrogenation based on the above embodiments:

[0064] N=int(∑n i )+1

[0065] In the above formula, N is used to represent the effective number of hydrogenation times, n i It is used to indicate the effective filling value corresponding to the i-th hydrogen filling. Int can be used to indicate rounding.

[0066] Among them, n i It can be determined by 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] Based on this, for the 35MPa scenario, from 0 to 35MPa is a complete use, which is recorded as a life cycle loss. For the 70MPa scenario, from 0 to 70MPa is a complete use, which is recorded as a life cycle loss.

[0070] In order to ensure the safety of hydrogen refueling, in another possible implementation, during the hydrogen refueling process, the hydrogen filling rate corresponding to the on-board hydrogen storage system can also be detected. If the detected hydrogen filling rate is greater than or equal to the preset filling rate threshold, the hydrogen refueling is terminated.

[0071] Among them, the hydrogen state of charge (H2SOC) can refer to the ratio of the current storage capacity of hydrogen in the on-board hydrogen storage system to its total storage capacity, that is, it can intuitively reflect the hydrogen storage capacity in the on-board hydrogen storage system. Based on this, the hydrogen filling situation can be intuitively detected. When the hydrogen filling rate is greater than or equal to the preset filling rate threshold (such as 100%), it indicates that it is full, so the hydrogen filling is terminated. It can be understood that when it is detected that the hydrogen filling rate is greater than 100%, active leakage can be appropriately performed to avoid the danger of overcharging.

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

[0073] In order to ensure the safety of hydrogen refueling, in another possible implementation, during the process of hydrogen refueling, the change trend of the hydrogen parameters corresponding to the on-board hydrogen storage system can also be detected, wherein the hydrogen parameters can be used to indicate the characteristics of the hydrogen stored in the on-board hydrogen storage system, thereby reflecting the changes in the hydrogen stored in the on-board hydrogen storage system during the hydrogen refueling process. If the change trend of the hydrogen parameters indicates that the length of time that the hydrogen parameters remain unchanged exceeds the preset time, it indicates that during the hydrogen refueling process, the situation of the hydrogen stored in the on-board hydrogen storage system has not changed, and it may be that the hydrogen is not stored in the on-board hydrogen storage system, so the hydrogen refueling is stopped at this time. Based on this, the situation of the hydrogen stored in the system during the hydrogen refueling process is detected to ensure that hydrogen is effectively refilled into 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 be increasing, the mass will be increasing, and the system pressure will also continue to rise. Therefore, in one possible implementation, the aforementioned hydrogen parameters can be used to indicate the quality 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 changing trend of the quality of hydrogen or the changing trend of the pressure of hydrogen during the hydrogenation process, the purpose of detecting the condition of the hydrogen stored in the system during the hydrogenation process is achieved.

[0075] It can be understood that it basically corresponds to the method embodiment, so the relevant parts can refer to the partial description of the method embodiment.

[0076] Figure 2 This is a structural diagram of a detection device for a vehicle-mounted hydrogen storage system provided in an embodiment of the present application, wherein 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 filling machine to fill hydrogen into the on-board hydrogen storage system of the vehicle in response to a hydrogen filling request for the vehicle;

[0078] The acquisition unit 202 is used to acquire the vehicle-end hydrogen system pressure increase rate determined by the vehicle and the station-end hydrogen system pressure increase rate determined by the hydrogen filling machine during the hydrogen filling process;

[0079] The detection unit 203 is used to detect the vehicle-mounted hydrogen storage system according to the vehicle-end hydrogen system pressure boosting rate and the station-end hydrogen system pressure boosting rate to obtain a detection result, and the detection result is used to indicate whether there is a leakage in the vehicle-mounted hydrogen storage system during the hydrogen filling process.

[0080] In a possible implementation manner, the acquiring unit is further configured to:

[0081] Obtaining a first system pressure and a second system pressure corresponding to the on-board hydrogen storage system, wherein the first system pressure is used to indicate the system pressure corresponding to the on-board hydrogen storage system before hydrogen filling, and the second system pressure is used to indicate the system pressure corresponding to the on-board hydrogen storage system after hydrogen filling is completed;

[0082] The effective number of hydrogenation times corresponding to the on-board hydrogen storage system is determined according to 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 hydrogenation.

[0083] In a possible implementation manner, the acquiring unit is further configured to:

[0084] Obtaining a hydrogen system pressure level parameter corresponding to the on-board hydrogen storage system, wherein the hydrogen system pressure level parameter is used to indicate an upper limit value of the system pressure corresponding to when the on-board hydrogen storage system is full of hydrogen;

[0085] Determining the effective filling value for the current time according to the pressure difference between the first system pressure and the second system pressure and the hydrogen system pressure level parameter;

[0086] The effective hydrogen refueling times corresponding to the on-board hydrogen storage system are determined according to the effective refueling value of the current time.

[0087] In a possible implementation manner, the acquiring unit is further configured to:

[0088] Determine the ratio of the pressure difference to the pressure level parameter of the hydrogen system as the effective filling value for that time;

[0089] The multiple effective refueling values ​​of the current time are cumulatively added, and the effective number of hydrogenation times is determined based on the result of the cumulative addition.

[0090] In a possible implementation manner, the device further includes a generating unit:

[0091] The generation unit is used to generate life warning prompt information for the on-board hydrogen storage system if the effective hydrogen refueling times are greater than a times threshold, and the life warning prompt information is used to indicate that the on-board hydrogen storage system has reached a fatigue cycle usage times.

[0092] In a possible implementation, the detection unit is further used for:

[0093] During the hydrogen filling process, the hydrogen filling rate corresponding to 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 filling is terminated.

[0095] In a possible implementation, the detection unit is further used for:

[0096] During the hydrogen filling process, detecting a change trend of a hydrogen parameter corresponding to the on-board hydrogen storage system, wherein the hydrogen parameter is used to indicate a characteristic of the hydrogen stored in the on-board hydrogen storage system;

[0097] If the variation trend of the hydrogen parameter indicates that the hydrogen parameter remains unchanged for a period exceeding a preset period, hydrogen filling is stopped.

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

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

[0100] If the detection result indicates that there is a leak, hydrogen filling is stopped and leakage prompt information is generated, wherein the leakage prompt information is used to prompt that there is a leak in the on-board hydrogen storage system during the hydrogen filling process.

[0101] It can be seen from the above technical solution that in response to the hydrogen refueling request for the vehicle, the hydrogen refueling machine is controlled to refuel the vehicle's onboard hydrogen storage system with hydrogen, and in the process of hydrogen refueling, the vehicle-end hydrogen system pressure increase rate determined by the vehicle is obtained, and the station-end hydrogen system pressure increase rate determined by the hydrogen refueling machine is obtained. Among them, the hydrogen system pressure increase rate can be used to indicate the rate of increase of the system pressure of the on-board hydrogen storage system during the hydrogen refueling process, which can reflect the instantaneous hydrogen refueling rate. The vehicle-end hydrogen system pressure increase rate is determined by the vehicle and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the vehicle itself. The station-end hydrogen system pressure increase rate is determined by the hydrogen refueling machine and is used to indicate the rate of increase of the system pressure during the hydrogen refueling process evaluated by the hydrogen refueling station. It can be understood that, ideally, for the same hydrogen refueling process, the rate of increase of the system pressure evaluated by both the vehicle end and the hydrogen refueling station end should be similar or even the same. When there is a leak in the on-board hydrogen storage system, it will cause a significant difference between the two. Therefore, the on-board hydrogen storage system can be tested based on the vehicle-side hydrogen system pressure boosting rate and the station-side hydrogen system pressure boosting rate to obtain a test result indicating whether there is a leak in the on-board hydrogen storage system during hydrogen refueling. It can be seen that during the hydrogen refueling process, based on the hydrogen system pressure boosting rate determined on both the vehicle side and the hydrogen refueling station side, the on-board hydrogen storage system is tested for leaks. Based on this, leakage problems in the on-board hydrogen storage system can be discovered in a timely manner to ensure the reliability of the on-board hydrogen storage system and better guarantee safety during subsequent use.

[0102] In another aspect, an embodiment of the present application provides a computer device, the computer device comprising 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 vehicle-mounted hydrogen storage system provided by the above embodiment 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 of the vehicle-mounted hydrogen storage system may be configured in the computer device.

[0106] On the other hand, an embodiment of the present application further provides a storage medium, wherein the storage medium is used to store a computer program, and the computer program is used to execute the detection method of the vehicle-mounted hydrogen storage system provided in the above embodiment.

[0107] In addition, an embodiment of the present application also provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the detection method of the vehicle-mounted hydrogen storage system provided in the above embodiment.

[0108] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and 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., various media that can store program codes.

[0109] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0110] It should be noted that, in this article, relational terms such as "first" and "second", etc. (if any) are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0111] The above is a detailed introduction to a detection method and device for a vehicle-mounted hydrogen storage system provided by an embodiment of the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application. At the same time, for those skilled in the art, according to the method of the present application, there will be changes in the specific implementation method and application scope.

[0112] In summary, the content of this specification should not be understood as limiting the present application, and any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in this application should be included in the protection scope of this application. Moreover, based on the implementations provided in the above aspects, this application can also be further combined to provide more implementations.

Claims

1. A detection method for a vehicle-mounted hydrogen storage system, characterized in that: The method comprises: In response to a hydrogen refueling request for a vehicle, controlling a hydrogen refueling machine to refuel an onboard hydrogen storage system of the vehicle with hydrogen; During the hydrogen filling process, obtaining a vehicle-end hydrogen system pressure increase rate determined by the vehicle, and obtaining a station-end hydrogen system pressure increase rate determined by the hydrogen filling machine; The on-board hydrogen storage system is tested according to the pressure boost rate of the vehicle-end hydrogen system and the pressure boost rate of the station-end hydrogen system to obtain a test result, which is used to indicate whether there is a leak in the on-board hydrogen storage system during hydrogen filling.

2. The method according to claim 1, characterized in that The method further comprises: Obtaining a first system pressure and a second system pressure corresponding to the on-board hydrogen storage system, wherein the first system pressure is used to indicate the system pressure corresponding to the on-board hydrogen storage system before hydrogen filling, and the second system pressure is used to indicate the system pressure corresponding to the on-board hydrogen storage system after hydrogen filling is completed; The effective number of hydrogenation times corresponding to the on-board hydrogen storage system is determined according to 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 hydrogenation.

3. The method according to claim 2, characterized in that The method further comprises: Obtaining a hydrogen system pressure level parameter corresponding to the on-board hydrogen storage system, wherein the hydrogen system pressure level parameter is used to indicate an upper limit value of the system pressure corresponding to when the on-board hydrogen storage system is full of hydrogen; The determining, according to the pressure difference between the first system pressure and the second system pressure, the effective number of hydrogen refuelings corresponding to the on-board hydrogen storage system comprises: Determining the effective filling value for the current time according to the pressure difference between the first system pressure and the second system pressure and the hydrogen system pressure level parameter; The effective hydrogen refueling times corresponding to the on-board hydrogen storage system are determined according to the effective refueling value of the current time.

4. The method according to claim 3, characterized in that The determining the effective filling value according to the pressure difference between the first system pressure and the second system pressure and the hydrogen system pressure level parameter comprises: Determine the ratio of the pressure difference to the pressure level parameter of the hydrogen system as the effective filling value for that time; The determining, according to the effective refueling value of the current time, the effective number of hydrogen refuelings corresponding to the on-board hydrogen storage system includes: The multiple effective refueling values ​​of the current time are cumulatively added, and the effective number of hydrogenation times is determined based on the result of the cumulative addition.

5. The method according to claim 2, characterized in that: The method further comprises: If the effective hydrogenation times are greater than the times threshold, life warning prompt information for the on-board hydrogen storage system is generated, and the life warning prompt information is used to indicate that the on-board hydrogen storage system has reached the fatigue cycle usage times.

6. The method according to claim 1, characterized in that The method further comprises: During the hydrogen filling process, the hydrogen filling rate corresponding to the on-board hydrogen storage system is detected; If the detected hydrogen filling rate is greater than or equal to a preset filling rate threshold, hydrogen filling is terminated.

7. The method according to claim 1, characterized in that The method further comprises: During the hydrogen filling process, detecting a change trend of a hydrogen parameter corresponding to the on-board hydrogen storage system, wherein the hydrogen parameter is used to indicate a characteristic of the hydrogen stored in the on-board hydrogen storage system; If the variation trend of the hydrogen parameter indicates that the hydrogen parameter remains unchanged for a period exceeding a preset period, hydrogen filling is stopped.

8. The method according to claim 7, characterized in that 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.

9. The method according to any one of claims 1 to 8, characterized in that: The method further comprises: If the detection result indicates that there is a leak, hydrogen filling is stopped and leakage prompt information is generated, wherein the leakage prompt information is used to prompt that there is a leak in the on-board hydrogen storage system during the hydrogen filling process.

10. A detection device for a vehicle-mounted hydrogen storage system, characterized in that: The device comprises a control unit, an acquisition unit and a detection unit: The control unit is used to control the hydrogen filling machine to fill hydrogen into the on-board hydrogen storage system of the vehicle in response to a hydrogen filling request for the vehicle; The acquisition unit is used to acquire the vehicle-end hydrogen system pressure increase rate determined by the vehicle and the station-end hydrogen system pressure increase rate determined by the hydrogen filling machine during the hydrogen filling process; The detection unit is used to detect the vehicle-mounted hydrogen storage system according to the vehicle-end hydrogen system pressure boosting rate and the station-end hydrogen system pressure boosting rate to obtain a detection result, and the detection result is used to indicate whether there is a leak in the vehicle-mounted hydrogen storage system during hydrogen refueling.

Images