CN110783606B - Method and device for detecting quality of fuel hydrogen and hydrogen fuel cell engine - Google Patents
Method and device for detecting quality of fuel hydrogen and hydrogen fuel cell engine Download PDFInfo
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- CN110783606B CN110783606B CN201910907678.0A CN201910907678A CN110783606B CN 110783606 B CN110783606 B CN 110783606B CN 201910907678 A CN201910907678 A CN 201910907678A CN 110783606 B CN110783606 B CN 110783606B
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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
- H01M8/0444—Concentration; Density
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- 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
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Abstract
The invention belongs to the technical field of fuel cell engines, and particularly relates to a method and a device for detecting the quality of fuel hydrogen and a hydrogen fuel cell engine. The detection method comprises the following steps: receiving a detection instruction; calculating the mass of fuel hydrogen consumed cumulatively, and simultaneously integrating the required power and the actual power of the hydrogen fuel cell engine respectively to obtain an accumulated value of the required power over time and an accumulated value of the actual power over time; calculating a ratio of an accumulated value of the actual power over time to an accumulated value of the required power over time when it is confirmed that the mass of the fuel hydrogen gas that is cumulatively consumed reaches a preset consumption value; and judging whether the quality of the fuel hydrogen meets the requirement or not according to the ratio.
Description
Technical Field
The invention belongs to the technical field of fuel cell engines, and particularly relates to a method and a device for detecting the quality of fuel hydrogen and a hydrogen fuel cell engine.
Background
The hydrogen fuel cell mainly comprises a hydrogen gas path, an air path and a water management path, wherein the hydrogen gas and the air generate chemical reaction inside the galvanic pile to generate water, and chemical energy is converted into electric energy and releases heat at the same time. The hydrogen fuel cell engine has high requirement on the quality of hydrogen, and if the quality of the hydrogen is not up to standard (namely, the purity is insufficient), on one hand, the chemical reaction is influenced, and then the output power of the engine is influenced, and on the other hand, the catalyst is deteriorated. Therefore, it is important to detect the quality of hydrogen. However, there is no method of detecting the quality of hydrogen gas in a hydrogen fuel cell engine in the prior art.
Disclosure of Invention
The object of the present invention is to solve at least the problem that there is no method for detecting the quality of hydrogen gas in a hydrogen fuel cell engine at present. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides a method for detecting the quality of fuel hydrogen, including:
receiving a detection instruction;
calculating the mass of fuel hydrogen consumed cumulatively, and simultaneously integrating the required power and the actual power of the hydrogen fuel cell engine respectively to obtain an accumulated value of the required power over time and an accumulated value of the actual power over time;
calculating a ratio of an accumulated value of the actual power over time to an accumulated value of the required power over time when it is confirmed that the mass of the fuel hydrogen gas that is cumulatively consumed reaches a preset consumption value;
and judging whether the quality of the fuel hydrogen meets the requirement or not according to the ratio.
The method for detecting the quality of the fuel hydrogen according to the embodiment of the invention takes the ratio of the accumulated value of the actual power of the hydrogen fuel cell engine over time to the accumulated value of the required power over time as the criterion for judging the quality of the fuel hydrogen, and the method has practical feasibility because the actual power of the hydrogen fuel cell engine is reduced when the purity of the fuel hydrogen is insufficient. In addition, the accumulated value of the actual power along with the time and the accumulated value of the required power along with the time are used for judging, and compared with a mode of only taking an instantaneous value at a certain moment as a judgment basis, the method can avoid introducing errors and further avoid the occurrence of misjudgment, so that the method has higher judgment accuracy.
In some embodiments of the present invention, the determining whether the quality of the fuel hydrogen meets the requirement according to the ratio includes:
determining that the quality of the fuel hydrogen meets the requirement according to the condition that the ratio is greater than or equal to a preset value;
and determining that the quality of the fuel hydrogen does not meet the requirement according to the condition that the ratio is smaller than a preset value.
In some embodiments of the present invention, after determining that the quality of the fuel hydrogen is not satisfactory according to the ratio being less than a preset value, the method further includes:
and sending out fault prompt information that the quality of the fuel hydrogen is not qualified.
In some embodiments of the invention, the calculating the mass of fuel hydrogen cumulatively consumed comprises:
calculating the mass flow of the fuel hydrogen;
and obtaining the mass of the fuel hydrogen consumed cumulatively according to the product of the mass flow and the time.
In some embodiments of the invention, the method further comprises:
calculating the mass flow of the fuel hydrogen gas according to the following formula
Wherein N is the number of the galvanic pile monomers; i is the output current of the electric pile; m is the enthalpy change of hydrogen; f is the Faraday constant.
In some embodiments of the present invention, before the receiving the detection instruction, the method further includes:
judging whether the fuel hydrogen is refilled;
when it is confirmed that the fuel hydrogen gas is refilled, a detection command is issued.
In some embodiments of the present invention, the determining whether the fuel hydrogen gas is refilled includes:
recording the pressure P1 in the hydrogen bottle before stopping;
monitoring the pressure P2 of the current hydrogen bottle, and calculating the difference between P2 and P1;
and when the difference is greater than a preset difference and the time length of the difference greater than the preset difference is greater than a preset time length, confirming that the fuel hydrogen is refilled.
A second aspect of the present invention proposes a device 100 for detecting the quality of fuel hydrogen, comprising:
a receiving module 10, configured to receive a detection instruction;
a calculation module 20 for calculating the mass of fuel hydrogen gas cumulatively consumed, calculating an accumulated value of required power and an accumulated value of actual power of the hydrogen fuel cell engine, and calculating a ratio of the accumulated value of actual power over time to the accumulated value of required power over time;
the judging module 30 is configured to judge whether the mass of the fuel hydrogen consumed cumulatively reaches a preset consumption value, and judge whether the mass of the fuel hydrogen meets the requirement according to the ratio.
In some embodiments of the present invention, the determination module 30 is further configured to determine whether the fuel hydrogen gas is refilled.
A third aspect of the invention provides a hydrogen fuel cell engine including the fuel hydrogen quality detection device in any one of the embodiments described above.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for detecting the quality of fuel hydrogen according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a fuel hydrogen quality detection device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device 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 "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
An embodiment of the first aspect of the present invention proposes a method for detecting the quality of fuel hydrogen, the method comprising the following steps:
s10: receiving a detection instruction;
s20: calculating the mass of fuel hydrogen consumed cumulatively, and simultaneously integrating the required power and the actual power of the hydrogen fuel cell engine respectively to obtain an accumulated value of the required power over time and an accumulated value of the actual power over time;
s30: calculating a ratio of an accumulated value of the actual power over time to an accumulated value of the required power over time when it is confirmed that the mass of the fuel hydrogen gas that is cumulatively consumed reaches a preset consumption value;
s40: and judging whether the quality of the fuel hydrogen meets the requirement or not according to the ratio.
The required power of the hydrogen fuel cell engine is the power required to be generated by the hydrogen fuel cell engine according to the running condition of the whole vehicle; the actual power of the hydrogen fuel cell engine refers to the power actually generated by the engine after the chemical energy is converted into the electric energy.
The method for detecting the quality of the fuel hydrogen according to the embodiment of the invention takes the ratio of the accumulated value of the actual power of the hydrogen fuel cell engine over time to the accumulated value of the required power over time as the criterion for judging the quality of the fuel hydrogen, and the method has practical feasibility because the actual power of the hydrogen fuel cell engine is reduced when the purity of the fuel hydrogen is insufficient. In addition, the accumulated value of the actual power along with the time and the accumulated value of the required power along with the time are used for judging, and compared with a mode of only taking an instantaneous value at a certain moment as a judgment basis, the method can avoid introducing errors and further avoid the occurrence of misjudgment, so that the method has higher judgment accuracy.
In some embodiments of the present invention, the determining whether the quality of the fuel hydrogen meets the requirement according to the ratio includes:
determining that the quality of the fuel hydrogen meets the requirement according to the condition that the ratio is greater than or equal to a preset value;
and determining that the quality of the fuel hydrogen does not meet the requirement according to the condition that the ratio is smaller than a preset value.
In this embodiment, when the ratio is smaller than the preset value, it indicates that the actual power of the hydrogen fuel cell engine is significantly reduced, and thus it can be determined that the quality of the fuel hydrogen gas is not satisfactory. It will be appreciated that the preset value may be set according to the model and operating conditions of the hydrogen fuel cell engine, which may be determined empirically or through experimentation.
In some embodiments of the present invention, after determining that the quality of the fuel hydrogen is not satisfactory according to the ratio being less than a preset value, the method further includes:
and sending out fault prompt information that the quality of the fuel hydrogen is not qualified.
In this embodiment, after determining that the quality of the fuel hydrogen does not meet the requirement, a corresponding fault prompt message may be sent to the user to prompt the user to take a treatment measure for the fault in time.
In some embodiments of the invention, the calculating the mass of fuel hydrogen cumulatively consumed comprises:
calculating the mass flow of the fuel hydrogen;
and obtaining the mass of the fuel hydrogen consumed cumulatively according to the product of the mass flow and the time.
Further, the mass flow rate of the fuel hydrogen gas may be calculated according to the following formula
Wherein N is the number of the galvanic pile monomers; i is the output current of the electric pile; m is the enthalpy change of hydrogen; f is the Faraday constant.
In some embodiments of the present invention, before the receiving the detection instruction, the method further includes:
s01: judging whether the fuel hydrogen is refilled;
s02: when it is confirmed that the fuel hydrogen gas is refilled, a detection command is issued.
Due to the off-quality of the fuel hydrogen gas, it usually occurs after filling a hydrogen cylinder with new fuel hydrogen gas, and in other cases, the problem of off-quality of the fuel hydrogen gas does not generally occur. Therefore, the detection command can be issued again when it is confirmed that the hydrogen gas tank is refilled with the fuel hydrogen gas.
In some embodiments of the present invention, the determining whether the fuel hydrogen gas is refilled includes:
recording the pressure P1 in the hydrogen bottle before stopping;
monitoring the pressure P2 of the current hydrogen bottle, and calculating the difference between P2 and P1;
and when the difference is greater than a preset difference and the time length of the difference greater than the preset difference is greater than a preset time length, confirming that the fuel hydrogen is refilled.
It is understood that the pressure in the hydrogen cylinder rises after the hydrogen gas is refilled, and whether refilling is performed or not can be judged by the change in the pressure in the hydrogen cylinder regardless of the manner of filling. Three commonly used filling methods are: firstly, the T15 is not powered off in the filling process; secondly, filling is carried out after T15 is cut off; ③ the power-off of T15 occurs during the filling process. The following are given for explanation:
in the first case, T15 is not powered off during the filling process, and in this case, the pressure in the hydrogen cylinder is always increased, and it can be determined whether the fuel hydrogen gas is refilled by the difference between P2 and P1.
In the second case, the filling is performed after the T15 is cut off, in this case, the pressure P2 in the hydrogen bottle can be obtained when the power is turned on after the filling is completed, and whether the fuel hydrogen is refilled can be judged by the difference between P2 and P1.
In the third case, a T15 power failure occurs during the filling process, assuming that the pressure in the hydrogen bottle before the power failure reaches P3, where the difference between P3 and P1 is smaller than a preset difference, then the filling continues after the power failure, and the pressure in the hydrogen bottle reaches P2 when the power is turned on after the filling is completed, in this case, the difference between P2 and P3 and the difference between P3 and P1 are added to obtain the difference between P2 and P1, and then it can be determined whether the fuel hydrogen is refilled according to the difference between P2 and P1.
An embodiment of the second aspect of the present invention proposes a detection device of the quality of fuel hydrogen, comprising:
a receiving module 10, configured to receive a detection instruction;
a calculation module 20 for calculating the mass of fuel hydrogen gas cumulatively consumed, calculating an accumulated value of required power and an accumulated value of actual power of the hydrogen fuel cell engine, and calculating a ratio of the accumulated value of actual power over time to the accumulated value of required power over time;
the judging module 30 is configured to judge whether the mass of the fuel hydrogen consumed cumulatively reaches a preset consumption value, and judge whether the mass of the fuel hydrogen meets the requirement according to the ratio.
In some embodiments of the present invention, the determination module 30 is further configured to determine whether the fuel hydrogen gas is refilled.
In some embodiments of the present invention, the detecting device further comprises a sending module 40 for sending out a fault prompt message indicating that the quality of the fuel hydrogen is not satisfactory.
An embodiment of the third aspect of the invention proposes a hydrogen fuel cell engine including the fuel hydrogen quality detection device in any one of the embodiments described above.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A method for detecting the quality of fuel hydrogen gas, comprising:
receiving a detection instruction;
calculating the mass of fuel hydrogen consumed cumulatively, and simultaneously integrating the required power and the actual power of the hydrogen fuel cell engine respectively to obtain an accumulated value of the required power over time and an accumulated value of the actual power over time;
calculating a ratio of an accumulated value of the actual power over time to an accumulated value of the required power over time when it is confirmed that the mass of the fuel hydrogen gas that is cumulatively consumed reaches a preset consumption value;
judging whether the quality of the fuel hydrogen meets the requirement or not according to the ratio;
the step of calculating the mass of fuel hydrogen cumulatively consumed includes:
calculating the mass flow of the fuel hydrogen;
obtaining the mass of the fuel hydrogen consumed cumulatively according to the product of the mass flow and the time;
wherein the mass flow of the fuel hydrogen is calculated
The formula of (1) is as follows:
in the formula, N is the number of the galvanic pile monomers; i is the output current of the electric pile; m is the enthalpy change of hydrogen; f is a Faraday constant;
the step of judging whether the quality of the fuel hydrogen meets the requirement according to the ratio comprises the following steps:
determining that the quality of the fuel hydrogen meets the requirement according to the condition that the ratio is greater than or equal to a preset value;
and determining that the quality of the fuel hydrogen does not meet the requirement according to the condition that the ratio is smaller than a preset value.
2. The method for detecting the quality of fuel hydrogen as claimed in claim 1, further comprising, after determining that the quality of fuel hydrogen is not satisfactory according to the ratio being less than a preset value:
and sending out fault prompt information that the quality of the fuel hydrogen is not qualified.
3. The method for detecting the quality of fuel hydrogen according to claim 1 or 2, characterized by further comprising, before the receiving a detection instruction:
judging whether the fuel hydrogen is refilled;
when it is confirmed that the fuel hydrogen gas is refilled, a detection command is issued.
4. The method for detecting the quality of fuel hydrogen according to claim 3, wherein the determining whether fuel hydrogen is refilled includes:
recording the pressure P1 in the hydrogen bottle before stopping;
monitoring the pressure P2 of the current hydrogen bottle, and calculating the difference between P2 and P1;
and when the difference is greater than a preset difference and the time length of the difference greater than the preset difference is greater than a preset time length, confirming that the fuel hydrogen is refilled.
5. An apparatus for detecting the quality of fuel hydrogen, comprising:
the receiving module is used for receiving a detection instruction;
a calculation module for calculating the mass of fuel hydrogen gas consumed cumulatively, calculating the cumulative value of required power and the cumulative value of actual power of a hydrogen fuel cell engine, and calculating the ratio of the cumulative value of actual power over time to the cumulative value of required power over time;
the judging module is used for judging whether the quality of the fuel hydrogen accumulated to be consumed reaches a preset consumption value or not and judging whether the quality of the fuel hydrogen meets the requirement or not according to the ratio;
wherein the process of calculating the mass of fuel hydrogen cumulatively consumed includes:
calculating the mass flow of the fuel hydrogen;
obtaining the mass of the fuel hydrogen consumed cumulatively according to the product of the mass flow and the time;
wherein the mass flow of the fuel hydrogen is calculated
The formula of (1) is as follows:
in the formula, N is the number of the galvanic pile monomers; i is the output current of the electric pile; m is the enthalpy change of hydrogen; f is a Faraday constant;
the process of judging whether the quality of the fuel hydrogen meets the requirement according to the ratio comprises the following steps:
determining that the quality of the fuel hydrogen meets the requirement according to the condition that the ratio is greater than or equal to a preset value;
and determining that the quality of the fuel hydrogen does not meet the requirement according to the condition that the ratio is smaller than a preset value.
6. The fuel hydrogen quality detection apparatus according to claim 5,
the determination module is further configured to determine whether the fuel hydrogen gas is refilled.
7. A hydrogen fuel cell engine, characterized by comprising the fuel hydrogen quality detection device according to claim 5 or 6.
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| CN113978316B (en) * | 2021-10-21 | 2024-04-16 | 潍柴动力股份有限公司 | Calculation method, device and storage medium for cruising mileage |
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