A fault diagnosis method and system for hydrogen energy equipment

Abstract

The present invention provides a fault diagnosis method and system for hydrogen energy equipment. The fault diagnosis method includes the following steps: determining the use status of the hydrogen energy equipment, and when the use status meets the standard status, starting to judge the working status of the hydrogen storage device of the hydrogen energy equipment; periodically obtaining the current output gas pressure of the hydrogen storage device, and when the current output gas pressure meets any one or more of the following conditions within two or more consecutive sampling periods: less than or equal to a first working threshold, falling within the fault pressure interval, and greater than or equal to a second working threshold, an alarm message is generated; and the alarm message is forwarded to the management center and / or hydrogen energy equipment that manages the hydrogen energy equipment. The above technology can improve the operation and maintenance efficiency and the user experience.

Description

Technical Field

[0001] The present invention relates to the field of new energy, and in particular to a fault diagnosis method and system for hydrogen energy equipment. Background Art

[0002] Hydrogen energy equipment, especially hydrogen terminal products, are commercial products of hydrogen energy using hydrogen fuel cells as carriers. In today's era of vigorous development of clean energy, due to the late start of the hydrogen energy industry in my country, immature development and imperfect technology, in order to promote the rapid development of the hydrogen energy industry and enable hydrogen energy to enter thousands of households as soon as possible, it is necessary to improve the management level of hydrogen energy equipment and platforms, and strengthen the data monitoring and analysis capabilities of hydrogen energy equipment and platforms.

[0003] Existing fault diagnosis of hydrogen energy equipment, especially the diagnosis of gas pressure failure of hydrogen storage devices, is mostly based on manual troubleshooting. That is, after removing the hydrogen storage device and accessories such as pipelines, the possible location of the fault is determined by the principle of elimination, and the diagnostic efficiency is low.

[0004] Based on this, a new type of hydrogen energy equipment fault diagnosis method and platform is needed, which can provide an immediate warning of fault conditions, inform users of the fault type, improve user experience, and facilitate maintenance by operators. Summary of the invention

[0005] In order to overcome the above technical defects, the purpose of the present invention is to provide a fault diagnosis method and system for hydrogen energy equipment to improve operation and maintenance efficiency.

[0006] The present invention discloses a fault diagnosis method for hydrogen energy equipment, comprising the following steps:

[0007] Determine the use status of the hydrogen energy equipment, and when the use status meets the standard status, start judging the working status of the hydrogen storage device of the hydrogen energy equipment;

[0008] The current output pressure of the hydrogen storage device is periodically obtained, and an alarm message is generated when the current output pressure satisfies any one or more of the following conditions within N consecutive sampling periods: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold;

[0009] Forward the alarm information to the management center and / or hydrogen energy equipment that manages the hydrogen energy equipment.

[0010] Preferably, the use state of the hydrogen energy device is determined, and when the use state meets the standard state, the step of starting the judgment on the working state of the hydrogen storage device of the hydrogen energy device comprises:

[0011] Setting a first sampling period of the hydrogen energy device in a standby state and a second sampling period in a running state, wherein the first sampling period is greater than the second sampling period;

[0012] The output gas pressure value of the hydrogen storage device of the hydrogen energy equipment obtained by sampling in the first sampling period is defined as a Class I gas pressure value, and the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment obtained by sampling in the second sampling period is defined as a Class II gas pressure value;

[0013] When the received output gas pressure values ​​are two or more consecutive gas pressure values ​​of the first category, or two or more consecutive gas pressure values ​​of the second category, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time, and the number of hydrogen exchanges is less than N times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio, it is determined that the use status of the hydrogen energy equipment meets the standard status, and the judgment of the working status of the hydrogen storage device of the hydrogen energy equipment is initiated.

[0014] Preferably, the current output pressure of the hydrogen storage device is periodically obtained. When the current output pressure satisfies any one or more of the following conditions within two or more consecutive sampling periods: less than or equal to a first working threshold, falling within a fault pressure interval, or greater than or equal to a second working threshold, the step of generating an alarm message includes:

[0015] When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≤ m kPa, a low pressure alarm message is generated, or

[0016] When one or more Class I pressure values, or one or more Class II pressure values ​​are negative, an abnormal alarm message is generated, or

[0017] When the hydrogen exchange time of the hydrogen storage device is greater than the preset time, and one or more Class I pressure values, or one or more Class II pressure values ​​≥ n kPa and < p kPa, a gas path bending alarm message is generated, or

[0018] When two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≥ p kPa, a high pressure alarm message is generated.

[0019] Preferably, the current output pressure of the hydrogen storage device is periodically obtained, and when the current output pressure satisfies any one or more of the following conditions within two or more consecutive sampling periods: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold, the step of generating an alarm message further includes:

[0020] When a Class I pressure value or a Class II pressure value decreases by more than q kPa compared to the Class I pressure value or Class II pressure value corresponding to the previous sampling period, and the continuous increase in pressure of the next three consecutive Class I pressure values ​​or the next three consecutive Class II pressure values ​​is ≤ r kPa, an abnormal alarm message is generated, or

[0021] When three or more consecutive Class I pressure values, or three or more consecutive Class II pressure values ​​< s kPa, a low pressure alarm message is generated, or

[0022] When two or more consecutive Class II air pressure values ​​are ≥x kPa and ≤y kPa, a stack pressure alarm message is generated.

[0023] Preferably, the method further comprises the following steps:

[0024] The hydrogen storage device is replaced. When the current output pressure of the replaced hydrogen storage device no longer satisfies any of the following conditions: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold, the alarm information is cancelled.

[0025] The present invention also discloses a gas pressure fault diagnosis system for hydrogen energy equipment, comprising:

[0026] The sampling module determines the use status of the hydrogen energy equipment, and when the use status meets the standard status, starts judging the working status of the hydrogen storage device of the hydrogen energy equipment;

[0027] The processing module periodically obtains the current output pressure of the hydrogen storage device, and generates an alarm message when the current output pressure satisfies any one or more of the following conditions within two or more consecutive sampling periods: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold;

[0028] The management center and / or hydrogen energy equipment receives the alarm information.

[0029] Preferably, the sampling module comprises:

[0030] A setting unit, which sets a first sampling period of the hydrogen energy device in a standby state and a second sampling period in a running state, wherein the first sampling period is greater than the second sampling period;

[0031] The setting unit further defines that the output gas pressure value of the hydrogen storage device of the hydrogen energy device sampled in the first sampling period is a first-class gas pressure value, and defines that the output gas pressure value of the hydrogen storage device of the hydrogen energy device sampled in the second sampling period is a second-class gas pressure value;

[0032] The diagnostic unit determines that the use status of the hydrogen energy device meets the standard status, and starts judging the working status of the hydrogen storage device of the hydrogen energy device when receiving output gas pressure values ​​that are two or more consecutive gas pressure values ​​of the first category, or two or more consecutive gas pressure values ​​of the second category, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time, and the number of hydrogen exchanges is less than 2 times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio.

[0033] Preferably, the processing module comprises:

[0034] Comparison unit, comparison unit judgment:

[0035] When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≤ m kPa, a low pressure alarm message is generated, or

[0036] When one or more Class I pressure values, or one or more Class II pressure values ​​are negative, an abnormal alarm message is generated, or

[0037] When the hydrogen exchange time of the hydrogen storage device is greater than the preset time, and one or more Class I pressure values, or one or more Class II pressure values ​​≥ n kPa and < p kPa, a gas path bending alarm message is generated, or

[0038] When two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≥ p kPa, a high pressure alarm message is generated.

[0039] Preferably, the comparison unit further determines:

[0040] When a Class I pressure value or a Class II pressure value decreases by more than q kPa compared to the Class I pressure value or Class II pressure value corresponding to the previous sampling period, and the continuous increase in pressure of the next three consecutive Class I pressure values ​​or the next three consecutive Class II pressure values ​​is ≤ r kPa, an abnormal alarm message is generated, or

[0041] When three or more consecutive Class I pressure values, or three or more consecutive Class II pressure values ​​< s kPa, a low pressure alarm message is generated, or

[0042] When two or more consecutive Class II air pressure values ​​are ≥x kPa and ≤y kPa, a stack pressure alarm message is generated.

[0043] Preferably, it also includes:

[0044] The cancellation module cancels the alarm information when the current output gas pressure of the replaced hydrogen storage device no longer meets any of the following conditions: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold.

[0045] Compared with the prior art, the above technical solution has the following beneficial effects:

[0046] 1. The management center integrates hardware and software indicators for judging hydrogen energy equipment failures. It can not only detect hydrogen energy equipment with abnormal indicators in a timely manner, but also continuously optimize the threshold of indicators by analyzing the operating effects of indicators;

[0047] 2. Realize the operation status monitoring of all hydrogen energy equipment on the whole map, notify the operation personnel in time for maintenance when problems are found, and conduct follow-up analysis on the events to improve the operation and maintenance efficiency;

[0048] 3. The false alarm rate of hydrogen energy equipment and platform failures is greatly reduced, further saving subsequent operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flow chart of a method for diagnosing air pressure faults in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0050] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0052] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0053] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0054] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0056] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0057] See also Figure 1 , shows a flow chart of a method for diagnosing gas pressure failure of hydrogen energy equipment, especially hydrogen terminal products, in accordance with a preferred embodiment of the present invention. In this embodiment, in order to determine whether the gas pressure of the hydrogen storage device of the hydrogen energy equipment fails, the following steps are used to determine:

[0058] S100: Determine the use status of the hydrogen energy equipment. When the use status meets the standard status, start judging the working status of the hydrogen storage device of the hydrogen energy equipment.

[0059] Hydrogen energy equipment is usually in two states, namely, operating state and standby state. In the operating state, the hydrogen energy equipment is started and operated by the user; in the standby state, the hydrogen energy equipment stops running somewhere and is in a static state. According to the different use states of hydrogen energy equipment, standard states in operation and standard states in standby are defined respectively. When the standard states are met, the working state of the hydrogen storage device of the hydrogen energy equipment is judged to avoid excessive energy consumption.

[0060] S200: Periodically obtain the current output pressure of the hydrogen storage device, and generate an alarm message when the current output pressure satisfies any one or more of the following conditions within N consecutive sampling periods: less than or equal to a first working threshold, falling within the fault pressure interval, and greater than or equal to a second working threshold.

[0061] When the diagnosis of the gas pressure fault of the hydrogen storage device is turned on, the current output gas pressure of the hydrogen storage device will be periodically obtained. It can be understood that when the gas pipe, valve or hydrogen storage device itself is mechanically damaged, the output gas pressure will be too low or too high. Therefore, the judgment method in this embodiment is that when the current output gas pressure is within two or more consecutive sampling cycles, that is, the data of a single sample is not used as the only judgment criterion, and two or more consecutive sampling data are required to meet the following conditions: less than or equal to a first working threshold (that is, the gas pressure is too low), falling within the fault gas pressure interval (that is, the gas pressure is abnormal), greater than or equal to any one or more of a second working threshold (that is, the gas pressure is too high), an alarm message is generated to indicate that the hydrogen storage device is currently faulty.

[0062] S300: forwarding the alarm information to the management center and / or hydrogen energy equipment that manages the hydrogen energy equipment

[0063] The management center can be a backend server or an intelligent terminal. The management center can forward the information to the operation and maintenance personnel, who can then check the source of the fault on site. The alarm information can be broken down into specific abnormal situations, making it easier for the operation and maintenance personnel to conduct targeted inspections.

[0064] The alarm information can also be sent to the display system of the hydrogen energy equipment to facilitate users to know the specific fault type.

[0065] In a preferred embodiment, step S100 includes:

[0066] S110: setting a first sampling period of the hydrogen energy device in a standby state and a second sampling period in a running state, and the first sampling period is greater than the second sampling period;

[0067] In order to determine the standard state of the hydrogen energy device, the sampling mode of the hydrogen energy device is set to have a first sampling period in the standby state and a second sampling period in the operating state, and the first sampling period is greater than the second sampling period. It can be understood that when the hydrogen energy device is in the standby state, the probability of causing the hydrogen storage device of the hydrogen energy device to fail is extremely low, so sampling can be performed once a longer period of time, for example, the first sampling period is 1 hour, that is, the output gas pressure of the hydrogen storage device is sampled every 1 hour; when the hydrogen energy device is in the operating state, accidental events during operation are likely to affect the hydrogen storage device and cause failures, so the second sampling period is shorter, for example, the second sampling period is 10 minutes, that is, the output gas pressure of the hydrogen storage device is sampled every 10 minutes.

[0068] S120: defining the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the first sampling period as a first-class gas pressure value, and defining the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the second sampling period as a second-class gas pressure value;

[0069] When judging a fault, the object of comparison should be the sampling results of the hydrogen energy equipment under the same working state. In other words, in this embodiment, the output gas pressure of the hydrogen storage device in the standby state sampled in the first sampling period is not compared with the output gas pressure of the hydrogen storage device in the operating state sampled in the second sampling period. For the convenience of comparison, the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the first sampling period is defined as a type of gas pressure value, and the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the second sampling period is defined as a type of gas pressure value. When comparing, type one gas pressure values ​​are compared with each other, type two gas pressure values ​​are compared with each other, and different types of gas pressure values ​​are not compared.

[0070] S130: When the received output gas pressure value is two or more consecutive gas pressure values ​​of the first category, or two or more consecutive gas pressure values ​​of the second category, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time, and the number of hydrogen exchanges is less than N times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio, it is determined that the use status of the hydrogen energy device meets the standard state, and the judgment of the working status of the hydrogen storage device of the hydrogen energy device is started.

[0071] The prerequisites for whether a hydrogen storage device failure occurs are:

[0072] - After the hydrogen storage device is replaced, the hydrogen replacement time is greater than a preset time (when the hydrogen storage device is replaced for too long, the output gas pressure is likely to be high. In order to avoid false alarms, sampling is required after a period of time);

[0073] -The hydrogen storage device was not replaced again;

[0074] -The remaining gas volume is greater than the preset gas volume ratio (e.g. 15%), indicating that the hydrogen energy equipment is working normally and the output gas pressure value is normal;

[0075] - Two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values, are received, indicating that the hydrogen energy equipment was in standby or operating state during the two consecutive samplings.

[0076] After the above-mentioned preconditions are met, it is determined that the use status of the hydrogen energy equipment meets the standard status before the judgment of the working status of the hydrogen storage device of the hydrogen energy equipment is started.

[0077] Further, step S200 includes:

[0078] The gas pressure of the hydrogen storage device is diagnosed as faulty when the following conditions are met:

[0079] S210: When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≤ m kPa, it means that the output pressure of the hydrogen storage device is low during two consecutive samplings (the minimum working pressure of the fuel cell is usually 15 kPa), and a low pressure alarm message will be generated; or

[0080] S210': When one or more Class I pressure values, or one or more Class II pressure values ​​are negative, it indicates that the hydrogen storage device may be seriously damaged. As long as one sampling value is lower than zero, an abnormal alarm message will be generated; or

[0081] S210”: When the hydrogen replacement time of the hydrogen storage device is greater than the preset time (when the hydrogen storage device is just replaced, the output gas pressure is prone to be slightly higher, so it is necessary to wait for a period of time before judging), and one or more Class I gas pressure values, or one or more Class II gas pressure values ​​≥ n kPa and < p kPa, it means that the gas path is bent somewhere, resulting in a slight increase in the output gas pressure value. Here, when the above situation occurs at least once, a gas path bending alarm message will be generated; or

[0082] S210”’: When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≥ p kPa (if a single sampling value is too high, there may be a false alarm, so it needs to be judged again), a high pressure alarm message will be generated here.

[0083] Furthermore, step S200 further includes:

[0084] S210””: When a Class I air pressure value or a Class II air pressure value decreases by more than q kPa compared to the Class I air pressure value or Class II air pressure value corresponding to the previous sampling period, it indicates a sudden drop in air pressure, and when the continuous increase in pressure of the next three consecutive Class I air pressure values ​​or the next three consecutive Class II air pressure values ​​is ≤r kPa and cannot be restored to the normal value, it indicates that the output air pressure is affected by the fault, and an abnormal alarm message will be generated; or

[0085] S210””’: When three or more consecutive Class I pressure values, or three or more consecutive Class II pressure values ​​< s kPa, a low pressure alarm message will also be generated here, or

[0086] S210”””: When two or more consecutive Class II gas pressure values ​​are ≥x kPa and ≤y kPa, the fuel cell stack may be insufficient in power, in which case a stack pressure alarm message will be generated.

[0087] The above sampling results will correspond to different faults, which will facilitate targeted inspections by operation and maintenance personnel.

[0088] In a preferred embodiment, the air pressure fault diagnosis method further comprises the following steps:

[0089] S400: Replace the hydrogen storage device. When the current output pressure of the replaced hydrogen storage device no longer satisfies any of the following conditions: less than or equal to a first working threshold, falling within the fault pressure range, and greater than or equal to a second working threshold, the alarm information is cancelled.

[0090] If the above fault conditions are no longer met after the operation and maintenance personnel replace the hydrogen storage device, the alarm information will be cancelled and sent to the management center for record filing.

[0091] With the above configuration, the management center can not only check the location of the faulty hydrogen energy equipment, but also check in detail where the abnormality occurred. In addition, the failure of hydrogen energy equipment will not only be displayed on the management center, but also marked on the software commonly used by front-line operations. Operation and maintenance personnel can view the location of all faulty hydrogen energy equipment and a simple fault description on the software with one click.

[0092] The present invention also discloses a gas pressure fault diagnosis system for hydrogen energy equipment, comprising: a sampling module, which determines the use status of the hydrogen energy equipment, and when the use status meets the standard status, starts to judge the working status of the hydrogen storage device of the hydrogen energy equipment; a processing module, which periodically obtains the current output gas pressure of the hydrogen storage device, and when the current output gas pressure satisfies any one or more of the following within N consecutive sampling cycles: less than or equal to a first working threshold, falling within a fault gas pressure interval, and greater than or equal to a second working threshold, generates an alarm message; a management center and / or the hydrogen energy equipment receives the alarm message.

[0093] Preferably, the sampling module includes: a setting unit, which sets a first sampling period of the hydrogen energy device in a standby state and a second sampling period in an operating state, and the first sampling period is greater than the second sampling period; the setting unit also defines the output gas pressure value of the hydrogen storage device of the hydrogen energy device sampled in the first sampling period as a Class I gas pressure value, and defines the output gas pressure value of the hydrogen storage device of the hydrogen energy device sampled in the second sampling period as a Class II gas pressure value; a diagnostic unit, when receiving an output gas pressure value of two or more consecutive Class I gas pressure values, or two or more consecutive Class II gas pressure values, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time length, and the number of hydrogen exchanges is less than N times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio, it is determined that the use status of the hydrogen energy device meets the standard state, and the judgment of the working status of the hydrogen storage device of the hydrogen energy device is started.

[0094] Preferably, the processing module includes: a comparison unit, which judges: when two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≤m kPa, a low pressure alarm message is generated; when one or more Class I air pressure values, or one or more Class II air pressure values ​​are negative, an abnormal alarm message is generated; when the hydrogen exchange time of the hydrogen storage device is greater than a preset time length, and one or more Class I air pressure values, or one or more Class II air pressure values ​​are ≥n kPa and <p kPa, a gas path bending alarm message is generated; when two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≥p kPa, a high pressure alarm message is generated.

[0095] Preferably, the comparison unit also judges: when a Class I air pressure value or a Class II air pressure value decreases by more than q kPa compared with the Class I air pressure value or Class II air pressure value corresponding to the previous sampling period, and the continuous increase in pressure of the next three consecutive Class I air pressure values ​​or the next three consecutive Class II air pressure values ​​is ≤r kPa, an abnormal alarm message is generated; or when three or more consecutive Class I air pressure values, or three or more consecutive Class II air pressure values ​​are <s kPa, a low pressure alarm message is generated; or when two or more consecutive Class II air pressure values ​​are ≥x kPa and ≤y kPa, a stack pressure alarm message is generated.

[0096] Preferably, it also includes: a cancellation module, which cancels the alarm information when the current output gas pressure of the replaced hydrogen storage device no longer meets each of the following conditions: less than or equal to a first working threshold, falling within a fault pressure range, and greater than or equal to a second working threshold.

[0097] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fault diagnosis method for hydrogen energy equipment, characterized in that: The following steps are involved: Determining the use status of the hydrogen energy device, and when the use status meets the standard status, starting to judge the working status of the hydrogen storage device of the hydrogen energy device; Periodically acquiring the current output gas pressure of the hydrogen storage device, and generating an alarm message when the current output gas pressure satisfies any one or more of the following conditions within N consecutive sampling periods: being less than or equal to a first working threshold, falling within a fault pressure interval, and being greater than or equal to a second working threshold; The alarm information is forwarded to a management center and / or hydrogen energy device that manages the hydrogen energy device.

2. The fault diagnosis method according to claim 1, characterized in that: Determining the use state of the hydrogen energy device, when the use state meets the standard state, starting the step of judging the working state of the hydrogen storage device of the hydrogen energy device includes: Setting a first sampling period of the hydrogen energy device in a standby state and a second sampling period in a running state, wherein the first sampling period is greater than the second sampling period; The output gas pressure value of the hydrogen storage device of the hydrogen energy equipment obtained by sampling in the first sampling period is defined as a Class I gas pressure value, and the output gas pressure value of the hydrogen storage device of the hydrogen energy equipment obtained by sampling in the second sampling period is defined as a Class II gas pressure value; when the received output gas pressure value is two or more consecutive Class I gas pressure values, or two or more consecutive Class II gas pressure values, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time length, and the number of hydrogen exchanges is less than N times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio, it is determined that the use status of the hydrogen energy equipment meets the standard status, and the judgment of the working status of the hydrogen storage device of the hydrogen energy equipment is started.

3. The fault diagnosis method according to claim 2, characterized in that: The step of periodically acquiring the current output gas pressure of the hydrogen storage device, and when the current output gas pressure satisfies any one or more of the following in two or more consecutive sampling periods: being less than or equal to a first working threshold, falling within a fault pressure interval, and being greater than or equal to a second working threshold, generating an alarm message comprises: When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≤ m kPa, a low pressure alarm message is generated, or When one or more Class I air pressure values, or one or more Class II air pressure values ​​are negative, an abnormal alarm message is generated; when the hydrogen replacement time of the hydrogen storage device is greater than the preset time length, and one or more Class I air pressure values, or one or more Class II air pressure values ​​are ≥n kPa and <p kPa, an air path bending alarm message is generated, and n <p; or when two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≥p kPa, a high pressure alarm message is generated.

4. The fault diagnosis method according to claim 3, characterized in that: The step of periodically acquiring the current output pressure of the hydrogen storage device, and when the current output pressure satisfies any one or more of the following in two or more consecutive sampling periods: being less than or equal to a first working threshold, falling within a fault pressure interval, and being greater than or equal to a second working threshold, the step of generating an alarm message further includes: When a Class I pressure value or a Class II pressure value decreases by more than q kPa compared to the Class I pressure value or Class II pressure value corresponding to the previous sampling period, and the continuous increase in pressure of the next three consecutive Class I pressure values ​​or the next three consecutive Class II pressure values ​​is ≤ r kPa, an abnormal alarm message is generated, or When three or more consecutive Class I pressure values, or three or more consecutive Class II pressure values ​​< s kPa, a low pressure alarm message is generated, or When two or more consecutive Class II air pressure values ​​are ≥x kPa and ≤y kPa, a stack pressure alarm message is generated, and x<y.

5. The fault diagnosis method according to claim 1, characterized in that: The following steps are also included: The hydrogen storage device is replaced, and when the current output pressure of the replaced hydrogen storage device no longer satisfies any one of the following conditions: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold, the alarm information is cancelled.

6. A fault diagnosis system for hydrogen energy equipment, characterized in that: include: A sampling module, which determines the use status of the hydrogen energy device, and when the use status meets the standard status, starts judging the working status of the hydrogen storage device of the hydrogen energy device; The processing module periodically obtains the current output pressure of the hydrogen storage device, and generates an alarm message when the current output pressure satisfies any one or more of the following conditions within N consecutive sampling periods: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold; The management center and / or the hydrogen energy equipment receives the alarm information.

7. The fault diagnosis system according to claim 6, characterized in that: The sampling module comprises: A setting unit, which sets a first sampling period of the hydrogen energy device in a standby state and a second sampling period in a running state, wherein the first sampling period is greater than the second sampling period; The setting unit further defines that the output pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the first sampling period is a first-class pressure value, and defines that the output pressure value of the hydrogen storage device of the hydrogen energy equipment sampled in the second sampling period is a second-class pressure value; The diagnostic unit determines that the use status of the hydrogen energy device meets the standard status, and starts judging the working status of the hydrogen storage device of the hydrogen energy device, when receiving output gas pressure values ​​that are two or more consecutive gas pressure values ​​of the first category, or two or more consecutive gas pressure values ​​of the second category, and the hydrogen exchange time of the hydrogen storage device is greater than a preset time, and the number of hydrogen exchanges is less than N times, and the remaining gas volume of the hydrogen storage device is greater than a preset gas volume ratio.

8. The fault diagnosis system according to claim 7, characterized in that: The processing module comprises: A comparison unit, wherein the comparison unit determines: When two or more consecutive Class I pressure values, or two or more consecutive Class II pressure values ​​are ≤ m kPa, a low pressure alarm message is generated, or When one or more of the first-class gas pressure values, or one or more of the second-class gas pressure values ​​are negative, an abnormal alarm message is generated; or when the hydrogen replacement time of the hydrogen storage device is greater than the preset time, and one or more of the first-class gas pressure values, or one or more of the second-class gas pressure values ​​≥ n kPa and < p kPa, a gas path bending alarm message is generated, or When two or more consecutive Class I air pressure values, or two or more consecutive Class II air pressure values ​​are ≥ p kPa, a high pressure alarm message is generated.

9. The fault diagnosis system according to claim 8, characterized in that: The comparison unit also determines: When a Class I pressure value or a Class II pressure value decreases by more than q kPa compared to the Class I pressure value or Class II pressure value corresponding to the previous sampling period, and the continuous increase in pressure of the next three consecutive Class I pressure values ​​or the next three consecutive Class II pressure values ​​is ≤ r kPa, an abnormal alarm message is generated, or When three or more consecutive Class I pressure values, or three or more consecutive Class II pressure values ​​< s kPa, a low pressure alarm message is generated, or When two or more consecutive Class II air pressure values ​​are ≥x kPa and ≤y kPa, a stack pressure alarm message is generated.

10. The fault diagnosis system according to claim 6, characterized in that: Also includes: The cancellation module cancels the alarm information when the current output gas pressure of the replaced hydrogen storage device no longer meets any of the following conditions: less than or equal to a first working threshold, falling within a fault pressure interval, and greater than or equal to a second working threshold.

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