CN114597457B - Safety detection device and method for fuel cell system - Google Patents
Safety detection device and method for fuel cell system Download PDFInfo
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- CN114597457B CN114597457B CN202011409948.4A CN202011409948A CN114597457B CN 114597457 B CN114597457 B CN 114597457B CN 202011409948 A CN202011409948 A CN 202011409948A CN 114597457 B CN114597457 B CN 114597457B
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- 239000000446 fuel Substances 0.000 title claims abstract description 59
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000001257 hydrogen Substances 0.000 claims abstract description 108
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 108
- 238000007789 sealing Methods 0.000 claims abstract description 73
- 239000011261 inert gas Substances 0.000 claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 claims abstract description 59
- 238000003860 storage Methods 0.000 claims abstract description 57
- 239000007789 gas Substances 0.000 claims abstract description 27
- 239000010406 cathode material Substances 0.000 claims abstract description 6
- 239000010405 anode material Substances 0.000 claims abstract description 5
- 230000017525 heat dissipation Effects 0.000 claims abstract description 5
- 239000002737 fuel gas Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 5
- 208000028659 discharge Diseases 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04679—Failure or abnormal function of fuel cell stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/008—Disposal or recycling of fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04425—Pressure; Ambient pressure; Flow at auxiliary devices, e.g. reformers, compressors, burners
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0444—Concentration; Density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04686—Failure or abnormal function of auxiliary devices, e.g. batteries, capacitors
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- 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
- Y02E60/50—Fuel cells
Abstract
The invention provides a safety detection device and a safety detection method for a fuel cell system. The device is used for detecting a fuel cell system and comprises a hydrogen storage OR production module, a cathode material module, an anode material module, a galvanic pile module and a heat dissipation module; the hydrogen storage OR production module is sealed by adopting a sealing cavity and is connected with an inert gas inlet and an inert gas outlet, and electromagnetic valves are arranged between the inert gas inlet and the inert gas outlet and the hydrogen storage OR production module; a first pressure sensor and a first combustible gas detector are arranged in a sealing cavity of the hydrogen storage OR production module; the pile module is sealed by adopting a sealing cavity and is connected with an inert gas inlet and an inert gas outlet, and electromagnetic valves are arranged between the inert gas inlet and the inert gas outlet and the pile module; a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of the galvanic pile module. The invention is used for monitoring the leakage condition of the hydrogen storage OR hydrogen production module and the pile module, and controlling the leakage of the hydrogen of the fuel cell and the discharge treatment after the leakage.
Description
Technical Field
The present invention relates to the field of fuel cell technologies, and in particular, to a safety detection device and method for a fuel cell system.
Background
Currently, fuel cells are widely used in various fields, and safety thereof is also attracting attention. The fuel cell system is generally composed of a galvanic pile module, a hydrogen supply/production module, a heat dissipation module, an auxiliary module and the like, wherein the galvanic pile module is fast and the hydrogen supply/production module has a hydrogen leakage risk, so that potential safety hazards are caused, and safety accidents are induced. The security design is therefore also designed mainly for the two modules.
In the prior art, the concentration of hydrogen is monitored on line, and fuel supply is cut off after leakage is found. However, this solution presents a safe handling of the hydrogen that has leaked into the process of cutting off the supply; monitoring the influence of the position on the actual leakage quantity, and having false alarm or delay phenomenon; the invention introduces a safety detection device and a safety detection method for a fuel cell system, which are used for controlling hydrogen leakage and discharge treatment after the leakage of a fuel cell.
Disclosure of Invention
According to the above-mentioned technical problems of hydrogen leakage and post-leakage discharge treatment of fuel cells, a safety detection device and method for fuel cell system are provided
The invention adopts the following technical means:
a safety detection device of a fuel cell system is used for detecting the fuel cell system and comprises a hydrogen storage OR production module, an anode material module, a cathode material module, a pile module and a heat dissipation module;
the hydrogen storage OR hydrogen production module is sealed by adopting a sealing cavity and is connected with an inert gas inlet and an inert gas outlet, a first electromagnetic valve is arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module, and a second electromagnetic valve is arranged between the inert gas outlet and the hydrogen storage OR hydrogen production module; a first pressure sensor and a first combustible gas detector are arranged in a sealing cavity of the hydrogen storage OR production module;
the pile module is sealed by adopting a sealing cavity, the pile module is connected with an inert gas inlet and an inert gas outlet, a third electromagnetic valve is arranged between the inert gas inlet and the pile module, and a fourth electromagnetic valve is arranged between the inert gas outlet and the pile module; and a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of the galvanic pile module.
Further, the pile modules are multiple, and each pile module is sealed by adopting a sealing cavity.
Further, the sealed chamber of each pile module is connected with an inert gas inlet and an inert gas outlet, a third electromagnetic valve is arranged between the inert gas inlet and each pile module, and a fourth electromagnetic valve is arranged between the inert gas outlet and each pile module; a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of each pile module.
A sealing method based on a hydrogen storage OR production module and a pile module in the safety detection device of the fuel cell system comprises the following steps:
s1, acquiring pressure parameters of a hydrogen storage OR hydrogen production module and a pile module sealing chamber;
s2, determining sealing pressure;
s3, opening a first electromagnetic valve arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module and a third electromagnetic valve arranged between the inert gas inlet and the galvanic pile module, and introducing inert gas;
s4, detecting whether the pressure value of the sealing chamber of the hydrogen storage OR hydrogen production module and the galvanic pile module is equal to the determined sealing pressure; if the first electromagnetic valve and the third electromagnetic valve are equal, closing the first electromagnetic valve and the third electromagnetic valve; if not, returning to the execution of the step S3.
The invention also provides a safety detection method of the fuel cell system, which is realized based on the safety detection device of the fuel cell system and comprises the following steps:
a1, setting initial sealing pressure 0-P of a hydrogen storage OR hydrogen production module sealing cavity and a galvanic pile module sealing cavity 1 Calculating a preferred value of the initial seal pressure;
a2, calculating a pressure threshold value detected by the pressure sensor;
a3, acquiring pressure values of the hydrogen storage OR hydrogen production module and the sealing chamber of the galvanic pile module in real time, and calculating a sealing pressure value increased in the leakage process;
a4, determining the leakage position, if the hydrogen storage OR hydrogen production module leaks, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage position; if the pile module leaks, executing the step A5; if the fuel cell system is not in the pile leakage state, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage part;
a5, detecting whether the leakage gas is combustible gas or not when the pressure value obtained in real time is in a set pressure threshold range, and judging whether the performance of the fuel cell system is normal or not if the leakage gas is not combustible gas; executing the step A7; if the fuel gas is combustible gas, judging whether the pressure value is larger than a pressure threshold value at the moment; executing the step A6;
a6, if the pressure value is not greater than the pressure threshold value, opening a first electromagnetic valve arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module and a third electromagnetic valve arranged between the inert gas inlet and the pile module, and introducing inert gas until the pressure value is greater than the leakage quantity; if the pressure value is larger than the pressure threshold value, fuel supply is cut off, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened until all fuel gas is discharged, sealing cavities of the hydrogen storage OR hydrogen production module and the pile module are opened, and the leakage part is maintained;
a7, if the performance of the fuel cell system is normal, continuing to operate; if the performance of the fuel cell system is abnormal, gradually increasing the air quantity, and judging whether the air quantity reaches the maximum value or not;
a8, if the air quantity reaches the maximum value, opening sealing cavities of the hydrogen storage OR hydrogen production module and the pile module, and maintaining the leakage part; if the air quantity does not reach the maximum value, returning to the step A6.
Further, the calculating the preferred value of the initial sealing pressure is specifically:
setting the normal working pressure of the hydrogen storage OR hydrogen production module and the electric pile module as P 1 The allowable leakage amount of the hydrogen storage OR production module and the pile module is a%, and the formula for calculating the optimal value is as follows:
P initial sealing pressure ＝P 1 ×(1-2×a％)。
Further, the specific formula of the calculating pressure threshold value detected by the pressure sensor is as follows:
P threshold value ＝P Sealing arrangement ×(1+a％)。
Further, the specific formula of the sealing pressure value increased in the leakage process is as follows:
P post-leak sealing pressure ＝P Display device -P Initial sealing pressure +P 1 。
Compared with the prior art, the invention has the following advantages:
1. the safety detection device of the fuel cell system provided by the invention is different from the traditional leakage detection, and adopts an air pressure detection means to detect the leakage condition of the hydrogen storage OR production module and the pile module. The hydrogen storage OR hydrogen production module and the galvanic pile module are sealed into two independent chambers, inert gases (nitrogen, helium and the like) are filled into the two independent chambers, and the two sealed independent chambers are monitored together by using a pressure sensor and a hydrogen concentration alarm.
2. The safety detection device of the fuel cell system provided by the invention can control the hydrogen leakage and the discharge treatment after the leakage of the fuel cell in real time.
For the above reasons, the invention can be widely popularized in the fields of fuel cells and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of the structure of the device of the present invention.
Fig. 2 is a schematic diagram of a sealed cavity structure of the galvanic pile module according to the invention.
Fig. 3 is a flow chart of the sealing process of the present invention.
Fig. 4 is a flow chart of the method of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, the present invention provides a safety detection device for a fuel cell system, which is used for detecting a fuel cell system, and comprises a hydrogen storage OR production module, an anode material module, a cathode material module, a pile module and a heat dissipation module; wherein:
the hydrogen storage OR hydrogen production module is sealed by adopting a sealing cavity and is connected with an inert gas inlet and an inert gas outlet, a first electromagnetic valve is arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module, and a second electromagnetic valve is arranged between the inert gas outlet and the hydrogen storage OR hydrogen production module; a first pressure sensor and a first combustible gas detector are arranged in a sealing cavity of the hydrogen storage OR production module;
the pile module is sealed by adopting a sealing cavity, the pile module is connected with an inert gas inlet and an inert gas outlet, a third electromagnetic valve is arranged between the inert gas inlet and the pile module, and a fourth electromagnetic valve is arranged between the inert gas outlet and the pile module; a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of the galvanic pile module.
In particular, with continued reference to fig. 1 as a preferred embodiment of the present invention, the stack modules are plural and each stack module is sealed with a sealed cavity. As shown in fig. 2, the sealed chamber of each pile module is connected with an inert gas inlet and an inert gas outlet, a third electromagnetic valve is arranged between the inert gas inlet and each pile module, and a fourth electromagnetic valve is arranged between the inert gas outlet and each pile module; a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of each pile module.
The invention relates to a safety detection device of a fuel cell system, which has the following working principle:
anode materials enter the pile anode from the hydrogen storage OR hydrogen production module, cathode materials enter the pile module from cathode material sources (mostly pumps and air compressors), oxidation-reduction reaction occurs at the pile to release electric energy, and heat generated by the pile is discharged out of the system through a radiator. The modules needing to consider safety in the system mainly comprise a hydrogen storage OR hydrogen production module and a galvanic pile module, the two parts are respectively sealed by adopting a sealing cavity, an inert gas inlet and an inert gas outlet are respectively arranged, and the modules are respectively controlled by using electromagnetic valves. And collecting data in the hydrogen storage OR production module and the galvanic pile module by adopting a pressure sensor and a combustible gas detector in the sealed cavity.
Example 2
As shown in fig. 3, on the basis of embodiment 1, the invention further provides a sealing method based on the hydrogen storage OR production module and the pile module in the safety detection device of the fuel cell system, which comprises the following steps:
s1, acquiring pressure parameters of a hydrogen storage OR hydrogen production module and a pile module sealing chamber;
s2, determining sealing pressure;
s3, opening a first electromagnetic valve arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module and a third electromagnetic valve arranged between the inert gas inlet and the galvanic pile module, and introducing inert gas; after the inert gas is introduced, the pressure is maintained constant. The pressure sensor can detect the pressure change in the sealing chamber when the working pressure of the sealing chamber is slightly lower than the working pressure in the module to ensure leakage. If the working pressure in the module is 60kPa, the sealing pressure can be ensured to be about 40 kPa.
S4, detecting whether the pressure value of the sealing chamber of the hydrogen storage OR hydrogen production module and the galvanic pile module is equal to the determined sealing pressure; if the first electromagnetic valve and the third electromagnetic valve are equal, closing the first electromagnetic valve and the third electromagnetic valve; if not, returning to the execution of the step S3.
Example 3
As shown in fig. 4, on the basis of embodiments 1-2, the present invention further provides a fuel cell system safety detection method, which is implemented based on the above-mentioned fuel cell system safety detection device, and includes:
a1, setting initial sealing pressure 0-P of a hydrogen storage OR hydrogen production module sealing cavity and a galvanic pile module sealing cavity 1 Calculating a preferred value of the initial seal pressure;
a2, calculating a pressure threshold value detected by the pressure sensor;
a3, acquiring pressure values of the hydrogen storage OR hydrogen production module and the sealing chamber of the galvanic pile module in real time, and calculating a sealing pressure value increased in the leakage process;
a4, determining the leakage position, if the hydrogen storage OR hydrogen production module leaks, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage position; if the pile module leaks, executing the step A5; if the fuel cell system is not in the pile leakage state, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage part;
a5, detecting whether the leakage gas is combustible gas or not when the pressure value obtained in real time is in a set pressure threshold range, and judging whether the performance of the fuel cell system is normal or not if the leakage gas is not combustible gas; executing the step A7; if the fuel gas is combustible gas, judging whether the pressure value is larger than a pressure threshold value at the moment; executing the step A6;
a6, if the pressure value is not greater than the pressure threshold value, opening a first electromagnetic valve arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module and a third electromagnetic valve arranged between the inert gas inlet and the pile module, and introducing inert gas until the pressure value is greater than the leakage quantity; if the pressure value is larger than the pressure threshold value, fuel supply is cut off, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened until all fuel gas is discharged, sealing cavities of the hydrogen storage OR hydrogen production module and the pile module are opened, and the leakage part is maintained;
a7, if the performance of the fuel cell system is normal, continuing to operate; if the performance of the fuel cell system is abnormal, gradually increasing the air quantity, and judging whether the air quantity reaches the maximum value or not;
a8, if the air quantity reaches the maximum value, opening sealing cavities of the hydrogen storage OR hydrogen production module and the pile module, and maintaining the leakage part; if the air quantity does not reach the maximum value, returning to the step A6.
In specific implementation, as a preferred embodiment of the present invention, a preferred value of the initial sealing pressure is calculated, specifically:
setting the normal working pressure of the hydrogen storage OR hydrogen production module and the electric pile module as P 1 The allowable leakage amount of the hydrogen storage OR production module and the pile module is a%, and the formula for calculating the optimal value is as follows:
P initial sealing pressure ＝P 1 ×(1-2×a％)。
In specific implementation, as a preferred embodiment of the present invention, a pressure threshold value detected by a pressure sensor is calculated, and a specific formula is as follows:
P threshold value ＝P Sealing arrangement ×(1+a％)。
In specific implementation, as a preferred embodiment of the present invention, the sealing pressure value increased in the leakage process is calculated, and the specific formula is as follows:
P post-leak sealing pressure ＝P Display device -P Initial sealing pressure +P 1 。
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. A fuel cell system safety detection method, characterized by being implemented based on a fuel cell system safety detection device, comprising:
a1, setting initial sealing pressure 0-P of a hydrogen storage OR hydrogen production module sealing cavity and a galvanic pile module sealing cavity 1 Calculating a preferred value of the initial seal pressure;
a2, calculating a pressure threshold value detected by the pressure sensor;
a3, acquiring pressure values of the hydrogen storage OR hydrogen production module and the sealing chamber of the galvanic pile module in real time, and calculating a sealing pressure value increased in the leakage process;
a4, determining the leakage position, if the hydrogen storage OR hydrogen production module leaks, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage position; if the pile module leaks, executing the step A5; if the fuel cell system is not in the pile leakage state, cooling the fuel cell system, opening the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve until all fuel gas is exhausted, and maintaining the leakage part;
a5, detecting whether the leakage gas is combustible gas or not when the pressure value obtained in real time is in a set pressure threshold range, and judging whether the performance of the fuel cell system is normal or not if the leakage gas is not combustible gas; executing the step A7; if the fuel gas is combustible gas, judging whether the pressure value is larger than a pressure threshold value at the moment; executing the step A6;
a6, if the pressure value is not greater than the pressure threshold value, opening a first electromagnetic valve arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module and a third electromagnetic valve arranged between the inert gas inlet and the pile module, and introducing inert gas until the pressure value is greater than the leakage quantity; if the pressure value is larger than the pressure threshold value, fuel supply is cut off, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened until all fuel gas is discharged, sealing cavities of the hydrogen storage OR hydrogen production module and the pile module are opened, and the leakage part is maintained;
a7, if the performance of the fuel cell system is normal, continuing to operate; if the performance of the fuel cell system is abnormal, gradually increasing the air quantity, and judging whether the air quantity reaches the maximum value or not;
a8, if the air quantity reaches the maximum value, opening sealing cavities of the hydrogen storage OR hydrogen production module and the pile module, and maintaining the leakage part; if the air quantity does not reach the maximum value, returning to the step A6;
the fuel cell system safety detection device is used for detecting a fuel cell system and comprises a hydrogen storage OR hydrogen production module, an anode material module, a cathode material module, a pile module and a heat dissipation module, wherein:
the hydrogen storage OR hydrogen production module is sealed by adopting a sealing cavity and is connected with an inert gas inlet and an inert gas outlet, a first electromagnetic valve is arranged between the inert gas inlet and the hydrogen storage OR hydrogen production module, and a second electromagnetic valve is arranged between the inert gas outlet and the hydrogen storage OR hydrogen production module; a first pressure sensor and a first combustible gas detector are arranged in a sealing cavity of the hydrogen storage OR production module;
the pile module is sealed by adopting a sealing cavity, the pile module is connected with an inert gas inlet and an inert gas outlet, a third electromagnetic valve is arranged between the inert gas inlet and the pile module, and a fourth electromagnetic valve is arranged between the inert gas outlet and the pile module; and a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of the galvanic pile module.
2. The fuel cell system safety inspection method according to claim 1, wherein the number of the stack modules is plural, and each stack module is sealed with a seal chamber.
3. The safety inspection method of a fuel cell system according to claim 2, wherein the sealed chamber of each of the stack modules is connected to an inert gas inlet and an inert gas outlet, a third electromagnetic valve is provided between the inert gas inlet and each of the stack modules, and a fourth electromagnetic valve is provided between the inert gas outlet and each of the stack modules; a second pressure sensor and a second combustible gas detector are arranged in the sealing cavity of each pile module.
4. The fuel cell system safety inspection method according to claim 1, wherein the calculation of the preferred value of the initial seal pressure is specifically:
setting the normal working pressure of the hydrogen storage OR hydrogen production module and the electric pile module as P 1 The allowable leakage amount of the hydrogen storage OR production module and the pile module is a%, and the formula for calculating the optimal value is as follows:
P initial sealing pressure ＝P 1 ×(1-2×a％)。
5. The fuel cell system safety inspection method according to claim 1, wherein the calculation of the pressure threshold value detected by the pressure sensor is as follows:
P threshold value ＝P Sealing arrangement ×(1+a％)。
6. The fuel cell system safety inspection method according to claim 1, wherein the calculation of the sealing pressure value increased in the leakage process is specifically formulated as:
P post-leak sealing pressure ＝P Display device -P Initial sealing pressure +P 1 。
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| CN211348563U (en) * | 2019-08-06 | 2020-08-25 | 武汉中极氢能产业创新中心有限公司 | Hydrogen safety protection device and electric pile test system |
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Patent Citations (4)
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| CN104835978A (en) * | 2015-05-05 | 2015-08-12 | 上海交通大学 | Automatic assembling system of proton exchange membrane fuel cell stacks |
| CN108321413A (en) * | 2018-04-08 | 2018-07-24 | 苏州弗尔赛能源科技股份有限公司 | A kind of on-vehicle fuel Hydrogen Controlling Device |
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