CN113847546A - Method and equipment for detecting hydrogen storage cylinder - Google Patents

Method and equipment for detecting hydrogen storage cylinder Download PDF

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Publication number
CN113847546A
CN113847546A CN202111147677.4A CN202111147677A CN113847546A CN 113847546 A CN113847546 A CN 113847546A CN 202111147677 A CN202111147677 A CN 202111147677A CN 113847546 A CN113847546 A CN 113847546A
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hydrogen storage
hydrogen
storage cylinder
volume
expansion amount
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CN113847546B (en
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谭旭光
陈文淼
潘凤文
赵强
李力军
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Weichai Power Co Ltd
Weichai New Energy Technology Co Ltd
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Weichai Power Co Ltd
Weichai New Energy Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/028—Special adaptations of indicating, measuring, or monitoring equipment having the volume as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0426—Volume
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0184—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a method and equipment for detecting a hydrogen storage cylinder, which utilize the volume expansion of the hydrogen storage cylinder to monitor the working state of the hydrogen storage cylinder in real time and effectively improve the safety of the hydrogen storage cylinder in the using process. The method comprises the following steps: determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen; determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters; and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.

Description

Method and equipment for detecting hydrogen storage cylinder
The present application claims priority of the chinese patent application entitled "a method and apparatus for detecting hydrogen storage cylinders" filed by the national intellectual property office of the people's republic of china, application number 202110648050.0, on 10/6/2021, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of fuel cell vehicle detection, in particular to a method and equipment for detecting a hydrogen storage cylinder.
Background
At present, a fuel cell vehicle adopts a hydrogen storage mode of high-pressure gaseous hydrogen storage, a vehicle-mounted hydrogen storage cylinder is used as one of important parts of the fuel cell vehicle, the stored gaseous hydrogen is a source of the power of the whole vehicle, and the performance and the operation safety of the whole vehicle are directly related to the normal work of the vehicle-mounted hydrogen storage cylinder.
The existing detection methods for the vehicle-mounted hydrogen storage cylinder require that the vehicle-mounted hydrogen storage cylinder is detached from a vehicle and then carried out, the detection technical means has high requirements and can be implemented only by a professional detection mechanism, and the method cannot monitor the state of the cylinder in the using and filling processes in real time and has certain potential safety hazards.
Disclosure of Invention
The invention provides a method and equipment for detecting a hydrogen storage cylinder, which are used for monitoring the working state of the hydrogen storage cylinder in real time by using the volume expansion of the hydrogen storage cylinder, and effectively improving the safety of the hydrogen storage cylinder in the using process.
In a first aspect, an embodiment of the present invention provides a method for detecting a hydrogen storage cylinder, including:
determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.
The present embodiment detects the operating state of the hydrogen storage cylinder in real time based on the change in the volume expansion amount of the hydrogen storage cylinder before and after the hydrogen gas is injected. The safety of the hydrogen storage cylinder in the working process can be monitored efficiently in real time.
As an alternative embodiment, the determining the volume of the hydrogen storage cylinder after filling with hydrogen comprises:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
As an alternative embodiment, determining the mass of hydrogen remaining in the hydrogen storage cylinder prior to filling with hydrogen comprises:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
As an alternative embodiment, said determining the volume expansion amount of the hydrogen storage cylinder after filling according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter comprises:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
As an optional implementation manner, the determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relationship between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter includes:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
As an alternative embodiment, after determining the working state of the hydrogen storage cylinder after filling hydrogen, the method further comprises:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
As an alternative embodiment, the predicting the working state of the hydrogen storage cylinder according to the relationship between the variable trend curved surface and the rated curved surface space comprises:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
As an alternative embodiment, after predicting the working state of the hydrogen storage cylinder, the method further comprises:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
In a second aspect, an embodiment of the present invention provides an apparatus for detecting a hydrogen storage cylinder, including: a processor and a memory, the memory for storing programs executable by the processor, the processor for reading programs in the memory and performing the steps of:
determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.
As an alternative embodiment, the processor is configured to perform:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
As an alternative embodiment, the processor is configured to perform:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
As an alternative embodiment, the processor is configured to perform:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
As an alternative embodiment, the processor is configured to perform:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
As an optional implementation manner, after determining the operating state of the hydrogen storage cylinder after filling hydrogen, the processor is specifically further configured to execute:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
As an alternative embodiment, the processor is configured to perform:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
As an optional implementation manner, the processor is specifically further configured to perform:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
In a third aspect, an embodiment of the present invention further provides an apparatus for detecting a hydrogen storage cylinder, including:
a volume parameter determining unit for determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
the volume expansion unit is used for determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and the working state determining unit is used for determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state under different hydrogen storage parameters.
As an optional implementation manner, the volume parameter determining unit is specifically configured to:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
As an optional implementation manner, the volume parameter determining unit is specifically configured to:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
As an alternative embodiment, the volumetric expansion unit is specifically configured to:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
As an optional implementation manner, the unit for determining the working state is specifically configured to:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
As an optional implementation manner, after determining the working state of the hydrogen storage cylinder after filling hydrogen, the method further includes a prediction unit specifically configured to:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
As an optional implementation manner, the prediction unit is specifically configured to:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
As an optional implementation manner, after predicting the operating state of the hydrogen storage cylinder, the prediction unit is further specifically configured to:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, where the computer program is used to implement the steps of the method in the first aspect when the computer program is executed by a processor.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of an embodiment of a method for testing a hydrogen storage cylinder according to the present invention;
FIG. 2 is a schematic view showing a range of volumetric expansion of a hydrogen storage cylinder according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a curve with a trend of volume expansion according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for detecting a hydrogen storage cylinder according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an apparatus for testing a cylinder for storing hydrogen according to an embodiment of the present invention;
fig. 6 is a schematic view of an apparatus for detecting a hydrogen storage cylinder according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Regarding the on-board hydrogen storage cylinder as an example, the related terms of the hydrogen storage cylinder related to the present embodiment are explained as follows:
the term "on-vehicle hydrogen storage system" in the embodiment of the present invention refers to a device related to hydrogen gas filling, storage, delivery, supply, and control from a hydrogen gas filling port to an inlet of a fuel cell.
The term "vehicle-mounted hydrogen storage cylinder" in the embodiment of the invention is called as a hydrogen storage cylinder or a gas cylinder for short, and the vehicle-mounted hydrogen system is a special gas cylinder for filling and storing hydrogen.
The term "filling process" in the embodiment of the invention is a process of compressing and pressurizing hydrogen gas by using a hydrogen-charging station or other pressurizing facilities, and filling the hydrogen gas into a hydrogen storage cylinder.
The term "gas release process" in the embodiment of the invention is a working process of supplying hydrogen to a fuel cell in a steady state by controlling a valve of a vehicle-mounted hydrogen storage cylinder.
In the embodiment of the invention, the term "pressure cycle test" refers to a process of sequentially increasing the pressure in the hydrogen storage cylinder to a specified cycle pressure upper limit, maintaining the pressure for a certain time and reducing the pressure to a specified cycle pressure lower limit according to a preset program, and is called as a pressure cycle.
The term "cycle life" in the examples of the present invention refers to the maximum number of cycles that a hydrogen storage cylinder is specified to shift its full capacity or specified partial range without changing its performance.
The term "Hydrogen Management System (HMS)" in the embodiment of the present invention is a Management System for controlling Hydrogen supply of a Hydrogen System, collecting various parameters (temperature, pressure, etc.) of the System, and simultaneously ensuring safety of Hydrogen used by the System. ".
In the embodiment of the invention, the term of vehicle-station infrared communication is used for realizing the real-time state interaction between the vehicle and the station by configuring the infrared communication modules at the hydrogenation gun and the hydrogenation port of the fuel cell vehicle. The vehicle-station interactive information comprises the states of all parameters of the hydrogen storage system (real-time temperature and pressure, the number of gas cylinders, nominal working pressure, hydrogen filling quality and the like), the vehicle state and the like.
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
Embodiment 1, at present, the hydrogen storage mode adopted by the fuel cell vehicle is high-pressure gaseous hydrogen storage, and in the working process of the fuel cell vehicle, the hydrogen storage cylinder needs to be frequently filled from low capacity to high capacity or even full capacity, and the frequent filling process can cause the loss of the hydrogen storage cylinder to a certain degree, including but not limited to appearance loss, loss of the inner surface and the outer surface of the hydrogen storage cylinder, deformation of the hydrogen storage cylinder and the like. The loss can cause the failure of the hydrogen storage cylinder, when the hydrogen storage cylinder is in a failure state, the hydrogen storage cylinder needs to be replaced or maintained immediately, and the current detection means is that the hydrogen storage cylinder on the fuel cell vehicle needs to be disassembled and then a professional detection mechanism is used for detecting, so that the working state of the hydrogen storage cylinder cannot be monitored in real time in the running process of the fuel cell vehicle, the detection timeliness is poor, and certain potential safety hazards still exist.
The embodiment of the invention provides a method capable of detecting the working state of a hydrogen storage cylinder in real time, which has the core principle that the degradation degree of the hydrogen storage cylinder is determined by comparing the volume expansion amount of the current hydrogen storage cylinder with the volume expansion amount of the current hydrogen storage cylinder according to the change curve of the volume expansion amount of the hydrogen storage cylinder in different working states under different hydrogen storage parameters obtained by pre-measurement. The volume expansion amount of the hydrogen storage cylinder can be obtained in real time, so that the working state of the hydrogen storage cylinder can be monitored in real time by the method of the embodiment, and the safety of the hydrogen storage cylinder in the use process is effectively improved.
As shown in fig. 1, a method for detecting a hydrogen storage cylinder according to an embodiment of the present invention includes the following steps:
step 100, determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after hydrogen is injected;
the hydrogen storage parameters in the embodiment are used for representing various operating parameters which change the volume expansion of the hydrogen storage cylinder, including but not limited to the average temperature of the opening of the hydrogen storage cylinder, i.e. the temperature T of the hydrogen storage cylinder, and part or all of the pressure P of the hydrogen storage cylinder.
In the implementation, various working parameters of the vehicle-mounted hydrogen storage system before and after hydrogen filling can be obtained in real time, that is, the hydrogen storage parameters of the vehicle-mounted hydrogen storage system before hydrogen filling and the hydrogen storage parameters of the hydrogen storage cylinder after hydrogen filling can be obtained in real time, wherein the hydrogen storage parameters include, but are not limited to, the temperature T (also called as the absolute temperature T) of the hydrogen storage cylinder, the pressure P of the hydrogen storage cylinder, and the nominal volume (also called as the rated volume) V of the hydrogen storage cylinder0Some or all of (a).
And calculating the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen by using the obtained working parameters, wherein the mass of the residual hydrogen in the embodiment also represents the mass of the hydrogen in the hydrogen storage cylinder, and the volume after filling the hydrogen can be obtained according to the detected mass of the filled hydrogen and the mass of the residual hydrogen.
In some embodiments, the present embodiment can determine the mass of hydrogen remaining in the hydrogen storage cylinder before filling hydrogen, and the volume after filling hydrogen by any of the following methods:
the method 1 includes calculating the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen through formulas (1) to (2), specifically, determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen according to the obtained hydrogen storage parameters (including the temperature, the pressure and the rated volume of the hydrogen storage cylinder) of the hydrogen storage cylinder before filling hydrogen:
Figure BDA0003286017780000111
Figure BDA0003286017780000112
wherein, the definition of each parameter in the formula (1) is as follows:
m1the mass of hydrogen remaining in the hydrogen storage cylinder before filling with hydrogen is expressed in units of kilograms (kg);
ρ1hydrogen density is expressed in kilograms per cubic meter (kg/m)3)；
V0The unit is cubic meter (m) representing the rated volume of the hydrogen storage cylinder3)；
M represents the molar mass of hydrogen, M is a constant, and M is 2.01588X 10-3[kg/mol]；
P1The pressure of the hydrogen storage cylinder before filling hydrogen is expressed in units of megapascals (MPa);
Z1denotes the hydrogen compression factor, Z, before hydrogen injection1Dimensionless, Z1As a function of hydrogen temperature and pressure; wherein Z is1The solution method can be found in the A.6 th item in GB/T35178-2017;
r represents a molar gas constant, R is a constant, and R is 8.314472 x 10-6[MPa·m3/(mol·K)]；
T1Represents the temperature of the hydrogen storage cylinder before filling with hydrogen gas in kelvin (K);
wherein, the definition of each parameter in the formula (2) is as follows:
P1the pressure of the hydrogen storage cylinder before filling hydrogen is expressed in units of megapascals (MPa);
T1represents the temperature of the hydrogen storage cylinder before filling with hydrogen gas in kelvin (K);
vijrepresenting coefficients, being a set of constants, vijThe values are specifically shown in Table A.1 in GB/T35178-2017;
Z1denotes the hydrogen compression factor, Z, before hydrogen injection1Dimensionless, Z1As a function of hydrogen temperature and pressure; wherein Z is1The solution method can be found in the A.6 th item in GB/T35178-2017.
In implementation, the hydrogen storage parameters of the hydrogen storage cylinder before the hydrogen filling are obtained (including the temperature T of the hydrogen storage cylinder obtained before the hydrogen filling1Pressure P of hydrogen storage cylinder1Rated volume V0) Will V0、T1、P1Substituting the formula (1) to the formula (2) can obtain the residual hydrogen mass m in the hydrogen storage cylinder before filling hydrogen1。
Wherein the temperature T of the hydrogen storage cylinder1Pressure P of hydrogen storage cylinder1Can obtain the rated volume V in real time0Based on the hydrogen storage cylinder, the rated volumes of different hydrogen storage cylinders are different, and the rated volume of the same hydrogen storage cylinder is fixed and unchanged. The nominal volume can also be obtained by measurement. The present embodiment does not unduly limit how the temperature, pressure and rated volume of the hydrogen storage cylinder are obtained.
In the implementation, the mass m of the residual hydrogen in the hydrogen storage cylinder before filling the hydrogen is determined by the formulas (1) to (2)1According to the detected mass m of the injected hydrogen0And mass m of residual hydrogen1And hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen (including the temperature T of the hydrogen storage cylinder after filling hydrogen)2Pressure P2) The volume V after filling with hydrogen can be obtained by the formulas (3) to (5)2：
Figure BDA0003286017780000121
m2＝m0+m1Formula (4);
Figure BDA0003286017780000122
wherein, each parameter in the formula (3) is defined as follows:
V2the volume of the hydrogen storage cylinder after being filled with hydrogen is expressed in unit of cubic meter (m)3)；
Z2Represents the hydrogen compression factor, Z, of the hydrogen storage cylinder after filling with hydrogen2Dimensionless, Z2As a function of hydrogen temperature and pressure; wherein Z2The solution method can be found in the A.6 th item in GB/T35178-2017;
r represents a molar gas constant, R is 8.314472X 10-6[MPa·m3/(mol·K)]；
T2Represents the temperature of the hydrogen storage cylinder after filling with hydrogen gas in kelvin (K);
m represents the molar mass of hydrogen, M is a constant, and M is 2.01588 × 10-3[kg/mol]；
P2The pressure of the hydrogen storage cylinder after filling hydrogen is expressed in megapascals (MPa);
m2represents the total hydrogen mass in kilograms (kg) in the hydrogen storage cylinder after filling with hydrogen;
wherein, each parameter in the formula (4) is defined as follows:
m1the mass of hydrogen remaining in the hydrogen storage cylinder before filling with hydrogen is expressed in units of kilograms (kg);
m0represents the mass of hydrogen gas injected (also referred to as the amount of hydrogen added) in kilograms (kg);
m2represents the total hydrogen mass in kilograms (kg) in the hydrogen storage cylinder after filling with hydrogen;
wherein, each parameter in the formula (5) is defined as follows:
Z2indicating hydrogen gas filling and storingHydrogen compression factor, Z, of hydrogen cylinders2Dimensionless, Z2As a function of hydrogen temperature and pressure; wherein Z2The solution method can be found in the A.6 th item in GB/T35178-2017;
P2the pressure of the hydrogen storage cylinder after filling hydrogen is expressed in megapascals (MPa);
T2represents the temperature of the hydrogen storage cylinder after filling with hydrogen gas in kelvin (K);
vijrepresenting coefficients, being a set of constants, vijSee Table A.1 in GB/T35178-.
In practice, the hydrogen storage parameters (including) T of the hydrogen storage cylinder after filling hydrogen gas2、P2And the total mass m of hydrogen in the hydrogen storage cylinder after filling hydrogen2Determining the volume V of the hydrogen storage cylinder after filling hydrogen2。
Method 2, determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen through formula (6).
Figure BDA0003286017780000131
Wherein, each parameter in the formula (6) is defined as follows:
m1the mass of hydrogen remaining in the hydrogen storage cylinder before filling with hydrogen is expressed in units of kilograms (kg);
ρ1hydrogen density is expressed in kilograms per cubic meter (kg/m)3)；
V0The unit is cubic meter (m) representing the rated volume of the hydrogen storage cylinder3)；
M represents the molar mass of hydrogen, M is a constant, and M is 2.01588X 10-3[kg/mol]；
P1The pressure of the hydrogen storage cylinder before filling hydrogen is expressed in units of megapascals (MPa);
T1represents the temperature of the hydrogen storage cylinder before filling with hydrogen gas in kelvin (K);
α represents a fitting coefficient, α is a constant, α is 1.9155[ K/MPa ];
r represents a molar gas constant, R is a constant, and R is 8.314472 x 10-6[MPa·m3/(mol·K)]；
The temperature and pressure (i.e. hydrogen storage parameters) of the hydrogen storage cylinder can be obtained in real time, the rated volume is determined based on the hydrogen storage cylinder, the rated volumes of different hydrogen storage cylinders are different, and the rated volume of the same hydrogen storage cylinder is fixed and unchangeable. The nominal volume can also be obtained by measurement. The present embodiment does not unduly limit how the temperature, pressure and rated volume of the hydrogen storage cylinder are obtained.
After the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen is obtained through the formula (6), the volume of the hydrogen storage cylinder after filling hydrogen is obtained through calculation according to the formulas (7) to (8), that is, the volume of the hydrogen storage cylinder after filling hydrogen is calculated by using the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total mass of hydrogen in the hydrogen storage cylinder after filling hydrogen.
Figure BDA0003286017780000132
m2＝m0+m1Formula (8);
wherein, each parameter in the formula (7) is defined as follows:
V2the volume of the hydrogen storage cylinder after being filled with hydrogen is expressed in unit of cubic meter (m)3)；
T2Represents the temperature of the hydrogen storage cylinder after filling with hydrogen gas in kelvin (K);
α represents a fitting coefficient, α is a constant, α is 1.9155[ K/MPa ];
P2the pressure of the hydrogen storage cylinder after filling hydrogen is expressed in megapascals (MPa);
r represents a molar gas constant, R is 8.314472X 10-6[MPa·m3/(mol·K)]；
M represents the molar mass of hydrogen, M is a constant, and M is 2.01588 × 10-3[kg/mol]；
m2Indicating hydrogen storage after hydrogen additionThe total hydrogen mass in the cylinder is in kilograms (kg);
wherein, each parameter in the formula (8) is defined as follows:
m1the mass of hydrogen remaining in the hydrogen storage cylinder before filling with hydrogen is expressed in units of kilograms (kg);
m0represents the mass of hydrogen gas injected (also referred to as the amount of hydrogen added) in kilograms (kg); m is2Represents the total hydrogen mass in kilograms (kg) in the hydrogen storage cylinder after filling with hydrogen;
in the implementation, the hydrogen storage parameter T of the hydrogen storage cylinder after being filled with hydrogen is determined according to the formulas (7) to (8)2、P2And the total mass m of hydrogen in the hydrogen storage cylinder after filling hydrogen2Determining the volume V of the hydrogen storage cylinder after filling hydrogen2。
In some examples, the volume of the hydrogen storage cylinder after filling with hydrogen gas is determined in particular by:
1) determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
in the implementation, the formula (1) to the formula (2) or the formula (6) can be used for determining the quality of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameters and the rated volume before filling hydrogen, which are monitored in real time, and the specific steps are as follows:
11) determining pre-filling hydrogen storage parameters (including V) of the hydrogen storage cylinder before filling hydrogen0、P1、 T1)；
12) And determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
In implementation, the above equations (1) to (2) can be used to substitute the rated volume and the hydrogen storage parameters before filling into equations (1) to (2) to obtain the residual hydrogen mass in the hydrogen storage cylinder before filling. And substituting the rated volume and the hydrogen storage parameters before filling into the formula (6) by using the formula (6) to obtain the mass of the residual hydrogen in the hydrogen storage cylinder before filling.
2) Determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
in practice, the amount of hydrogen (m) added0) The obtained hydrogen gas can be obtained by receiving the hydrogenation amount monitored by the mass flow meter at the hydrogenation station end through the vehicle-station infrared communication module based on the configured mass flow meter, so as to determine the actual filling amount of the hydrogen gas. Summing the obtained hydrogen adding amount and the residual hydrogen mass, and determining the sum value as the total hydrogen mass (m) after adding hydrogen2)。
3) According to the hydrogen storage parameter (T) of the hydrogen storage cylinder after filling hydrogen2、P2) And the total hydrogen mass (m)2) Determining the volume (V) of the hydrogen storage cylinder after filling with hydrogen2)。
In the implementation, the volume of the hydrogen storage cylinder filled with hydrogen is calculated by using the formulas (3) to (5). The hydrogen storage parameter (the temperature T of the hydrogen storage cylinder) after filling2Pressure P of hydrogen storage cylinder2) And total hydrogen mass (m)2) Substituting into formula (3) -formula (5) to obtain the volume V of the filled hydrogen storage cylinder2. The volume of the hydrogen storage cylinder filled with hydrogen can be calculated by using the formulas (7) to (8). The hydrogen storage parameter (the temperature T of the hydrogen storage cylinder) after filling2Pressure P of hydrogen storage cylinder2) And total hydrogen mass (m)2) Substituting into formula (7) -formula (8) to obtain the volume V of the filled hydrogen storage cylinder2。
Step 101, determining the volume expansion of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
in this embodiment, after the volume of the hydrogen storage cylinder after filling is determined, the volume expansion amount of the hydrogen storage cylinder after filling is determined according to the volume and the rated volume of the hydrogen storage cylinder after filling hydrogen. However, since the volume of the hydrogen storage cylinder varies with the hydrogen storage parameters, in order to obtain more accurate volume expansion, the embodiment utilizes the rated volume corresponding to the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen and the volume (V) of the hydrogen storage cylinder after filling hydrogen2) Comparing, calculating to obtain an additionThe volume expansion of the hydrogen storage cylinder after injection. Optionally, the volume expansion Δ V is equal to the volume V2Rated volume V0。
In some examples, in order to more accurately calculate the volume expansion amount of the hydrogen storage cylinder after filling, a preset volume expansion amount under the hydrogen storage parameter, which is measured in advance, may be used as a reference factor, and the volume expansion amount of the hydrogen storage cylinder after filling is finally determined in a fitting manner according to a difference value between the volume of the hydrogen storage cylinder after filling hydrogen and the rated volume and a preset volume expansion amount corresponding to the hydrogen storage parameter measured after filling hydrogen.
Step 102, determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter;
the expansion amount interval is a range corresponding to the hydrogen storage parameter in a volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in a critical failure state under different hydrogen storage parameters.
In the implementation, the obtained volume expansion amount is known corresponding to the hydrogen storage parameter of the hydrogen storage cylinder at the moment, and under the same hydrogen storage parameter, the volume expansion amount interval corresponding to the hydrogen storage parameter can be determined from the volume expansion amount range, so that whether the volume expansion amount is in the volume expansion amount interval is compared, and the working state of the hydrogen storage cylinder is determined.
Wherein the volume expansion range includes but is not limited to normal state interval, critical failure state interval, failure state interval; if the measured volume expansion amount of the hydrogen storage cylinder is in a normal state interval, the hydrogen storage cylinder can continue to work, if the measured volume expansion amount of the hydrogen storage cylinder is in a critical failure state interval, the hydrogen storage cylinder is about to fail, and if the measured volume expansion amount of the hydrogen storage cylinder is in a failure state interval, the hydrogen storage cylinder is failed.
In some examples, the present embodiment determines the volume expansion amount range using the results of measurements performed by the hydrogen storage cylinders in different operating states. As the hydrogen storage cylinder increases along with the increase of pressure in the process of filling hydrogen, the axial direction and the radial direction of the hydrogen storage cylinder are increased, and the macroscopic expression is that the volume of the hydrogen storage cylinder expands. In the implementation, hydrogen filling tests are respectively carried out on qualified hydrogen storage cylinders (hydrogen storage cylinders in normal working state), hydrogen storage cylinders close to the limit cycle times (hydrogen storage cylinders in critical failure state) and overrun failure cylinders (hydrogen storage cylinders in failure state), pressure-expansion curve (P-delta V curve) and/or temperature-expansion curve (T-delta V curve) of the hydrogen storage cylinders in different working states are obtained, and the volume expansion range of the hydrogen storage cylinders is constructed through a large amount of test data. As shown in fig. 2, a schematic view of the volume expansion range of the hydrogen storage cylinder of the present embodiment, taking a pressure-expansion curve as an example, in which the black area represents the volume expansion range, that is, determined from the volume expansion amounts of the hydrogen storage cylinder in the critical failure state measured at different pressures; the lower region of the black region represents a normal range, that is, a range of volume expansion amounts of the hydrogen storage cylinder in a normal state measured at different pressures; the upper region of the black region represents the failure range, i.e., the range of the volume expansion amount of the hydrogen storage cylinder in the failure state measured at different pressures.
In some embodiments, the present embodiment can be used for online monitoring of a hydrogen storage cylinder, and after hydrogenation is performed on the hydrogen storage cylinder each time, the volume expansion amount of the hydrogen storage cylinder after hydrogenation at this time is measured and calculated, and is compared with an expansion amount interval in a volume expansion amount range, so as to implement online monitoring of the hydrogen storage cylinder, and the specific implementation steps of the monitoring are as follows:
before monitoring, the hydrogen in the hydrogen storage cylinder is discharged to normal pressure (0 MPa);
step 2) carrying out hydrogenation operation on the hydrogen storage cylinder according to a gradient of 5MPa, for example, the hydrogenation pressure is respectively 5MPa, 10MPa, 15MPa, 20MPa, 25MPa, 30MPa, 35MPa and the like, and recording the total hydrogenation amount in the hydrogen storage cylinder after each hydrogenation gradient is finished, namely the total hydrogen mass (m) in the hydrogen storage cylinder through a hydrogenation station terminali) (ii) a And recording various hydrogen storage parameters (including the temperature T of the hydrogen storage cylinder) of the hydrogen system after each hydrogenationiPressure and pressureForce Pi)；
Step 3) calculating the volume V of the hydrogen storage cylinder after each hydrogenation gradient is finished according to the following formula (9) or formula (10)i。
Figure BDA0003286017780000171
ViThe volume of the hydrogen storage cylinder after the ith filling of hydrogen is expressed in cubic meter (m)3)；
ZiRepresents the hydrogen compression factor, Z, of the hydrogen storage cylinder after the ith hydrogen fillingiDimensionless, ZiAs a function of hydrogen temperature and pressure, ZiThe solution method can be found in the A.6 th item in GB/T35178-2017;
r represents a molar gas constant, R is 8.314472X 10-6[MPa·m3/(mol·K)]；
TiThe temperature of the hydrogen storage cylinder after the ith hydrogen filling is expressed in Kelvin (K);
m represents the molar mass of hydrogen, M is a constant, and M is 2.01588 × 10-3[kg/mol]；
PiThe pressure of the hydrogen storage cylinder after the ith hydrogen filling is expressed in megapascals (MPa);
mirepresents the total hydrogen mass in kilograms (kg) in the hydrogen storage cylinder recorded by the hydrogen station after the ith filling;
Figure BDA0003286017780000181
wherein, each parameter in the formula (10) is defined as follows:
Vithe volume of the hydrogen storage cylinder after the ith filling of hydrogen is expressed in cubic meter (m)3)；
TiThe temperature of the hydrogen storage cylinder after the ith hydrogen filling is expressed in Kelvin (K);
α represents a fitting coefficient, α is a constant, α is 1.9155[ K/MPa ];
Pithe pressure of the hydrogen storage cylinder after the ith hydrogen filling is expressed in megapascals (MPa);
r represents a molar gas constant, R is 8.314472X 10-6[MPa·m3/(mol·K)]；
M represents the molar mass of hydrogen, M is a constant, and M is 2.01588 × 10-3[kg/mol]；
miRepresents the total hydrogen mass in kilograms (kg) in the hydrogen storage cylinder recorded by the hydrogen station after the ith filling;
and step 4) calculating the volume expansion amount of the hydrogen storage cylinder under different pressures through the following formula (11).
ΔVi＝Vi-V0Formula (11);
wherein, is Δ ViRepresents the volume expansion amount, ViDenotes the volume, V, of the hydrogen storage cylinder after the i-th filling of hydrogen0Indicating the nominal volume of the hydrogen storage cylinder. Wherein, ViAnd V0The units of (a) are consistent.
And 5) acquiring an expansion curve (P-delta V curve) of the hydrogen storage cylinder under different pressures, comparing the expansion curve with an expansion interval of an expansion range obtained by experimental environment measurement, and judging the expansion interval (comprising a normal state interval, a critical failure state interval and a failure state interval) which is met by the expansion curve so as to judge whether the hydrogen storage cylinder continues/stops serving.
In some examples, according to the relationship between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter, the determining of the working state of the hydrogen storage cylinder after filling hydrogen gas includes the following states:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state; in implementation, if it is determined that the hydrogen storage cylinder is in a critical failure state, the cylinder needs to be overhauled, for example, a reminding signal is sent to remind a user of overhauling.
If the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state; in implementation, if the hydrogen storage cylinder is determined to be in a normal state, the hydrogen gas can be continuously filled into the hydrogen storage cylinder.
And if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state. In implementation, if the hydrogen storage cylinder is determined to be in a failure state, the hydrogen storage cylinder should be stopped immediately, and an alarm signal can be sent to indicate a user to stop using the hydrogen storage cylinder.
In some examples, after determining the operating state of the hydrogen storage cylinder after filling hydrogen, embodiments of the present invention may further provide a method for predicting whether the hydrogen storage cylinder will fail or will fail critically based on a change trend of the operating state of the hydrogen storage cylinder, where the method is implemented by the following steps:
step 1, if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen charging;
in practice, the recorded volume expansion, hydrogen storage parameters and charging times are in one-to-one correspondence. The filling times specifically refer to the total filling times of hydrogen after the hydrogen storage cylinder is installed on a vehicle after leaving a factory, namely after the hydrogen is filled for the first time (namely, the hydrogen is filled), the filling times are accumulated to obtain the filling times of the currently filled hydrogen. Wherein the cumulative number of times of hydrogen filling can be obtained by the hydrogen adding station.
Step 2, determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder corresponding to different hydrogen storage parameters and different charging times recorded in a preset time period;
in implementation, the embodiment plots data about all volume expansion amounts, hydrogen storage parameters and charging times of the hydrogen storage cylinder recorded in a period of time into a relation change diagram between the charging times and the hydrogen storage parameters and the volume expansion amounts, and constructs a change trend curved surface of the volume expansion amounts recorded in a preset period of time according to the relation change diagram.
Step 3, predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and the rated curved surface space;
wherein the rated curved surface space is determined by the measured rated volume expansion of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
In the implementation, a schematic diagram of predicting the working state of the hydrogen storage cylinder is shown in fig. 3, the volume expansion amount of the hydrogen storage cylinder is predicted from two dimensions of the charging times and the hydrogen storage parameters in the embodiment, a space formed between two gray-scale curved surfaces in the diagram is a rated curved surface space, and the prediction mode is as follows:
1) if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
2) if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
3) and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
In some examples, the corresponding rated volume expansion amounts under different hydrogen storage parameters are different, and the number of times of charging the hydrogen storage cylinder also has a certain influence on the rated volume expansion amount of the hydrogen storage cylinder, so that according to the number of times of charging the hydrogen storage cylinder and the hydrogen storage parameters, a rated curved surface space of the rated volume expansion amount corresponding to the number of times of charging and the hydrogen storage parameters can be determined, and the change trend curved surface of the rated curved surface space and the current volume expansion amount is compared to predict the upcoming working state of the hydrogen storage cylinder. The filling times and the hydrogen storage parameters of the hydrogen storage cylinder which is about to be in a failure state can be predicted, so that a user is reminded to check the hydrogen storage cylinder in advance.
In some examples, if the predicted critical failure state of the operating state is a critical failure state, sending a warning signal and/or an alarm signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state, so as to prompt the user to inspect or replace the hydrogen storage cylinder as soon as possible; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarm signal to remind a user that the hydrogen storage cylinder is about to reach the failure state, so as to remind the user to check or replace the hydrogen storage cylinder as soon as possible.
In some examples, the embodiment further provides an implementation method for detecting a hydrogen storage cylinder, as shown in fig. 4, the implementation flow of the implementation method is as follows:
step 400, determining the hydrogen storage parameters before filling of the hydrogen storage cylinder before filling hydrogen and the rated volume of the hydrogen storage cylinder;
step 401, determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameters before filling and the rated volume;
step 402, obtaining the hydrogenation amount of hydrogen filled in a hydrogen storage cylinder;
step 403, determining the total hydrogen mass after the hydrogen is filled according to the hydrogen filling amount and the residual hydrogen mass;
step 404, obtaining hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
step 405, determining the volume of the hydrogen storage cylinder after filling hydrogen according to the hydrogen storage parameters and the total hydrogen mass of the hydrogen storage cylinder after filling hydrogen;
step 406, determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
specifically, the volume expansion amount of the hydrogen storage cylinder after filling is determined according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
Step 407, determining the working state of the hydrogen storage cylinder after hydrogen filling according to the relation between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter;
in the implementation, in step 407a, if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after hydrogen filling is a critical failure state;
step 407b, if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after hydrogen filling is a normal state;
and 407c, if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after hydrogen filling is a failure state.
Step 408, if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
step 409, determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
step 410, predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and the rated curved surface space;
and the rated curved surface space is determined by the measured rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
In implementation, if the change trend curved surface is located in the rated curved surface space, the working state of the hydrogen storage cylinder is predicted to be a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
And 411, if the predicted critical failure state or failure state of the working state is judged, sending a reminding signal and/or a warning signal.
In the embodiment, by obtaining the working parameters before and after hydrogenation and the actual hydrogenation amount of the hydrogenation station, the volume expansion amount of the hydrogen storage cylinder under different hydrogen storage parameters (such as hydrogenation pressure) can be calculated in real time, the volume expansion amount calculated in real time is closer to the real state of the cylinder, and the use state of the cylinder can be determined in real time; when the gas cylinder is about to be in or is in a failure state, a user can be reminded of executing corresponding operation in time, and the gas cylinder is maintained and replaced more according to the safety of the whole vehicle. And moreover, the failure state of the gas cylinder is predicted through the change trend of the volume expansion amount of the gas cylinder, and the gas cylinder is relatively periodically checked, so that the detection of the hydrogen storage gas cylinder has more theoretical basis, and the use safety of the hydrogen storage gas cylinder is effectively improved.
Embodiment 2, based on the same inventive concept, the embodiment of the present invention further provides a device for detecting a hydrogen storage cylinder, and as the device is the device in the method in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.
As shown in fig. 5, the apparatus includes a processor 500 and a memory 501, the memory 501 is used for storing programs executable by the processor 500, and the processor 500 is used for reading the programs in the memory 501 and executing the following steps:
determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.
As an alternative embodiment, the processor is configured to perform:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
As an alternative embodiment, the processor is configured to perform:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
As an alternative embodiment, the processor is configured to perform:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
As an alternative embodiment, the processor is configured to perform:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
As an optional implementation manner, after determining the operating state of the hydrogen storage cylinder after filling hydrogen, the processor is specifically further configured to execute:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
As an alternative embodiment, the processor is configured to perform:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
As an optional implementation manner, the processor is specifically further configured to perform:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
Embodiment 3, based on the same inventive concept, the embodiment of the present invention further provides a device for detecting a hydrogen storage cylinder, and since the device is the device in the method in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.
As shown in fig. 6, the apparatus includes:
a volume parameter determining unit 600 for determining the volume of the hydrogen storage cylinder and the hydrogen storage parameters after filling hydrogen;
the volume expansion determining unit 601 is used for determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
a working state determining unit 602, configured to determine a working state of the hydrogen storage cylinder after filling hydrogen gas according to a relationship between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, where the expansion amount interval is a range corresponding to the hydrogen storage parameter in a volume expansion amount range, and the volume expansion amount range is determined according to volume expansion amounts measured by the hydrogen storage cylinder in a critical failure state under different hydrogen storage parameters.
As an optional implementation manner, the volume parameter determining unit is specifically configured to:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
As an optional implementation manner, the volume parameter determining unit is specifically configured to:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
As an alternative embodiment, the volumetric expansion unit is specifically configured to:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
As an optional implementation manner, the unit for determining the working state is specifically configured to:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
As an optional implementation manner, after determining the working state of the hydrogen storage cylinder after filling hydrogen, the method further includes a prediction unit specifically configured to:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
As an optional implementation manner, the prediction unit is specifically configured to:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
As an optional implementation manner, after predicting the operating state of the hydrogen storage cylinder, the prediction unit is further specifically configured to:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, which when executed by a processor implements the following steps:
determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A method of testing a cylinder of hydrogen storage, the method comprising:
determining the volume and hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen;
determining the volume expansion amount of the filled hydrogen storage cylinder according to the volume and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameters;
and determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and an expansion amount interval corresponding to the hydrogen storage parameter, wherein the expansion amount interval is the range corresponding to the hydrogen storage parameter in the volume expansion amount range, and the volume expansion amount range is determined according to the volume expansion amount of the hydrogen storage cylinder in the critical failure state, which is measured under different hydrogen storage parameters.
2. The method of claim 1, wherein determining the volume of the hydrogen storage cylinder after filling with hydrogen comprises:
determining the mass of the residual hydrogen in the hydrogen storage cylinder before filling hydrogen;
determining the total hydrogen mass after the hydrogen is filled according to the obtained hydrogenation amount and the residual hydrogen mass;
and determining the volume according to the hydrogen storage parameters of the hydrogen storage cylinder after filling hydrogen and the total hydrogen mass.
3. The method of claim 2, wherein determining the mass of hydrogen gas remaining in the hydrogen storage cylinder prior to filling with hydrogen gas comprises:
determining the hydrogen storage parameters of the hydrogen storage cylinder before filling hydrogen;
and determining the mass of the hydrogen gas remained in the hydrogen storage cylinder before filling hydrogen according to the hydrogen storage parameter before filling and the rated volume of the hydrogen storage cylinder corresponding to the hydrogen storage parameter before filling.
4. The method of claim 1, wherein said determining a volumetric expansion of said filled hydrogen storage cylinder based on said volume and a nominal volume of said hydrogen storage cylinder corresponding to said hydrogen storage parameter comprises:
and determining the volume expansion amount of the filled hydrogen storage cylinder according to the difference value between the volume and the rated volume and the preset volume expansion amount corresponding to the hydrogen storage parameter.
5. The method according to claim 1, wherein the determining the working state of the hydrogen storage cylinder after filling hydrogen according to the relation between the volume expansion amount and the expansion amount interval corresponding to the hydrogen storage parameter comprises:
if the volume expansion amount belongs to the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a critical failure state;
if the volume expansion amount is lower than the minimum value of the expansion amount interval, determining that the working state of the hydrogen storage cylinder after the hydrogen gas is filled is a normal state;
and if the volume expansion is higher than the maximum value of the expansion interval, determining that the working state of the hydrogen storage cylinder after the hydrogen is filled is a failure state.
6. The method of claim 5, wherein after determining the operating state of the hydrogen storage cylinder after filling with hydrogen, further comprising:
if the working state is a non-failure state, recording the volume expansion amount, the hydrogen storage parameters and the charging times of the accumulated hydrogen charging of the hydrogen storage cylinder after the hydrogen is charged;
determining a change trend curved surface of the volume expansion amount of the hydrogen storage cylinder, which corresponds to different hydrogen storage parameters and different charging times and is recorded in a preset time period;
and predicting the working state of the hydrogen storage cylinder according to the relation between the change trend curved surface and a rated curved surface space, wherein the rated curved surface space is determined by the rated volume expansion amount of the hydrogen storage cylinder in the critical failure state under different charging times and different hydrogen storage parameters.
7. The method of claim 6, wherein predicting the operating condition of the hydrogen storage cylinder based on the relationship between the trend curved surface and the nominal curved surface space comprises:
if the change trend curved surface is positioned in the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a critical failure state;
if the variation trend curve is higher than the rated curve space, predicting the working state of the hydrogen storage cylinder to be a failure state;
and if the change trend curved surface is lower than the rated curved surface space, predicting that the working state of the hydrogen storage cylinder is a normal state.
8. The method of claim 7, wherein said predicting an operational state of said hydrogen storage cylinder further comprises:
if the predicted critical failure state of the working state is the critical failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the critical failure state; or the like, or, alternatively,
and if the predicted working state is a failure state, sending a reminding signal and/or an alarming signal to prompt a user that the hydrogen storage cylinder is about to reach the failure state.
9. An apparatus for testing a cylinder storing hydrogen, the apparatus comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read said program from said memory and to perform the steps of the method according to any one of claims 1 to 8.
10. A computer storage medium having a computer program stored thereon, the program, when executed by a processor, implementing the steps of the method according to any one of claims 1 to 8.
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