CN116611224A - Insulation model building method and device - Google Patents
Insulation model building method and device Download PDFInfo
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- CN116611224A CN116611224A CN202310502934.4A CN202310502934A CN116611224A CN 116611224 A CN116611224 A CN 116611224A CN 202310502934 A CN202310502934 A CN 202310502934A CN 116611224 A CN116611224 A CN 116611224A
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- 238000009413 insulation Methods 0.000 title claims abstract description 199
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000001257 hydrogen Substances 0.000 claims abstract description 185
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 185
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 175
- 239000000446 fuel Substances 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 150000002431 hydrogen Chemical class 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 13
- 238000011161 development Methods 0.000 abstract description 5
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- 238000004364 calculation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- SAPGTCDSBGMXCD-UHFFFAOYSA-N (2-chlorophenyl)-(4-fluorophenyl)-pyrimidin-5-ylmethanol Chemical compound C=1N=CN=CC=1C(C=1C(=CC=CC=1)Cl)(O)C1=CC=C(F)C=C1 SAPGTCDSBGMXCD-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010033425 Pain in extremity Diseases 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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
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Abstract
The invention discloses an insulation model building method and device, which are characterized in that a grounding part and a non-grounding part in a hydrogen system are distinguished; respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part; performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of the pipeline; and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline. Therefore, according to the established hydrogen insulation model, the insulation weak item of the hydrogen system can be clearly reflected, so that insulation improvement measures can be pertinently implemented. In addition, the hydrogen insulation model can quantify insulation indexes, solves the problems of difficult insulation risk, unclear indexes and the like of the current hydrogen fuel cell, shortens development time, and has milestone significance for the insulation design of the hydrogen fuel cell.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to an insulation model building method and device.
Background
Hydrogen fuel cell automobiles are generally designed based on pure electric platforms, which makes the whole automobile system more complex and high voltage and hydrogen coexist. The high-voltage electric safety design of the whole vehicle is an important ring of the whole vehicle design, wherein the high-voltage insulation design is important and difficult, the insulation design of a pure electric platform of the vehicle tends to be mature, the high-voltage insulation design is more than 10MΩ, the insulation of a hydrogen fuel cell system is low to be an insulation risk point of a hydrogen fuel cell automobile, the hydrogen fuel cell reactor needs to dissipate heat by ultrapure water, and the factors affecting the insulation performance are complex. In addition, during the dynamic operation of the hydrogen fuel cell, partial water is generated at the anode of the hydrogen system, and high-temperature gaseous water is mixed in the hydrogen loop, so that the insulation of the hydrogen system loop can be affected.
In the initial stage of hydrogen system development, insulation design is based on the experience of engineers, and no quantitative index exists, so that the insulation problem of the later system frequently occurs. After the insulation problem occurs, the insulation problem cannot be effectively analyzed, and only the method of' headache and foot pain of the head and foot can be adopted, so that the products are modified in batches, the time consumption is long, and the cost is high.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide an insulation model building method and apparatus, which can build an insulation design model of a hydrogen system in the initial stage of development of the hydrogen system, and visually display the weak insulation place, thereby improving the weak insulation place in a targeted manner.
According to a first aspect of the present invention, there is provided an insulation model building method applied to a hydrogen system of a hydrogen fuel cell; the method comprises the following steps:
distinguishing between grounded and non-grounded components in a hydrogen system; the grounding component comprises a hydrogen pump, a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve;
respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part;
performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of each section of pipeline;
and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline.
Optionally, performing insulation resistance equivalent processing on each section of pipeline in the hydrogen system to determine an equivalent insulation resistance of each section of pipeline, including:
determining the medium in the pipeline, the length of the pipeline and the sectional area of the pipeline for each section of pipeline;
obtaining the conductivity of the pipeline according to the medium in the determined pipeline;
and determining the equivalent insulation resistance of the pipeline according to the conductivity of the pipeline, the length of the pipeline and the sectional area of the pipeline.
Optionally, the conduit comprises a flow tube and a manifold.
Optionally, determining the medium in the pipeline includes:
judging whether the pipeline is a pipeline before stacking;
if yes, the medium in the pipeline is dry gas;
if not, the medium in the pipeline is high humidity gas.
Optionally, determining the equivalent insulation resistance of the pipeline according to the conductivity of the pipeline, the length of the pipeline and the sectional area of the pipeline includes:
the equivalent insulation resistance of the pipe is determined by the following formula:
R＝L/(kσ*S)
wherein R is the equivalent insulation resistance of the pipeline, and L is the length of the pipeline; s is the cross-sectional area of the pipeline; σ is the conductivity of the hydrogen anode tail drain, and k is the medium coefficient.
Alternatively, if the medium is a dry gas, k takes 0.001; if the medium is a highly humid gas, k is 0.05.
According to a second aspect of the present invention, there is provided an insulation model building apparatus comprising:
the distinguishing module is used for distinguishing the grounding part and the non-grounding part in the hydrogen system; the grounding component comprises a hydrogen pump, a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve;
the detection module is used for respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part;
the equivalent module is used for carrying out insulation resistance equivalent treatment on each section of pipeline in the hydrogen system and determining to obtain the equivalent insulation resistance of each section of pipeline;
the model building module is used for building an insulation model of the hydrogen system according to the insulation resistance of each non-grounding part and the equivalent insulation resistance of each section of pipeline.
According to a third aspect of the present invention, there is provided an electronic device comprising: the insulation model building method comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the insulation model building method when executing the computer program.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the foregoing insulation model building method.
The above-mentioned one or more technical solutions in the embodiments of the present disclosure at least have the following technical effects:
according to the insulation model building method and device provided by the embodiment of the specification, the grounding component and the non-grounding component in the hydrogen system are distinguished; respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part; performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of the pipeline; and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline. Therefore, according to the established hydrogen insulation model, the weak place of the hydrogen system can be clearly reflected, so that insulation improvement measures can be pertinently implemented; moreover, the insulation index can be quantized through the hydrogen insulation model, the problems of difficult insulation risk, unclear index and the like of the hydrogen fuel cell at present are solved, the development time is shortened, and the method has milestone significance for the insulation design of the hydrogen fuel cell.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
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 throughout the drawings, like reference numerals are used to designate like parts.
In the drawings:
fig. 1 shows a schematic diagram of an electronic device in an embodiment of the invention.
Fig. 2 shows a flowchart of an insulation model building method in an embodiment of the present invention.
Fig. 3 shows a composition diagram of a hydrogen system in an embodiment of the invention.
Fig. 4 shows a schematic diagram of the equivalent insulation resistance of the hydrogen system in an embodiment of the invention.
Fig. 5 shows a schematic diagram of insulation simulation of a hydrogen system in an embodiment of the invention.
Icon:
100-an electronic device; 10-an insulation model building device; 20-memory; 30-a processor; a 40-communication unit;
101-a hydrogen source; 102-a hydrogen inlet electromagnetic valve; 103-a hydrogen medium pressure sensor; 104-a proportional valve; 105-a hydrogen feed module; 106-hydrogen gas is fed into a pile pressure sensor; 107-galvanic pile; 108-hydrogen out-of-stack sensor; 109-a hydrogen pump; 110-a moisture device; 111-a hydrogen discharge valve; 112-a drain valve; 113-a moisture module; 114-tail gauntlet; 120-ammeter; 121-a direct current power supply;
Detailed Description
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 some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 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 definition or explanation thereof is necessary in the following figures.
Referring to fig. 1, fig. 1 is a block diagram of an electronic device 100 according to the present embodiment. As shown in fig. 1, the electronic device may include an insulation model building apparatus 10, a memory 20, a processor 30, and a communication unit 40, where the memory 20 stores machine-readable instructions executable by the processor 30, and when the electronic device 100 is operated, the processor 30 and the memory 20 communicate with each other through a bus, and the processor 30 executes the machine-readable instructions and performs an insulation model building method.
The memory 20, the processor 30 and the communication unit 40 are electrically connected directly or indirectly to each other to realize signal transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The insulation modeling apparatus 10 includes at least one software functional module that may be stored in the memory 20 in the form of software or firmware (fi rmware). The processor 30 is configured to execute executable modules (e.g., software functional modules or computer programs included in the insulation model building apparatus 10) stored in the memory 20.
In some embodiments, processor 30 is configured to perform one or more of the functions described in this embodiment. In some embodiments, processor 30 may include one or more processing cores (e.g., a single core processor (S) or a multi-core processor (S)).
For ease of illustration, only one processor is depicted in the electronic device 100. It should be noted, however, that the electronic device 100 in the present embodiment may also include a plurality of processors, and thus the steps performed by one processor described in the present embodiment may also be performed jointly by a plurality of processors or performed separately.
In this embodiment, the memory 20 is used for storing a program, and the processor 30 is used for executing the program after receiving an execution instruction. The method of defining a flow disclosed in any embodiment of the present invention may be applied to the processor 30, or implemented by the processor 30.
The communication unit 40 is used for establishing a communication connection between the electronic device 100 and other devices through a network, and for transceiving data through the network.
In the present embodiment, the electronic device 100 may be, but is not limited to, a notebook computer, a vehicle-end controller, etc., and the present embodiment does not impose any limitation on the specific type of the electronic device.
It will be appreciated that the structure shown in fig. 1 is merely illustrative. The electronic device 100 may also have more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
Based on the implementation architecture of fig. 1, the present embodiment provides an insulation model building method applied to a hydrogen system of a hydrogen fuel cell, which is executed by the electronic device 100 shown in fig. 1, and the steps of the insulation model building method provided in the present embodiment are explained in detail below based on the structural diagram of the electronic device 100 shown in fig. 1, and the insulation model building method includes steps 101 to 104 in combination with fig. 2:
step 101: distinguishing between grounded and non-grounded components in a hydrogen system;
among them, a hydrogen fuel cell is a power generation device that converts chemical energy in fuel, typically hydrogen, into electric energy by performing an oxidation-reduction reaction with oxygen or other oxidizing agents. The hydrogen gas is decomposed into electrons and hydrogen ions by a catalyst in the anode of the hydrogen fuel cell. Wherein the hydrogen ions pass through the proton exchange membrane (Proton Exchange Membrane) to the anode and react with oxygen to form water and heat. The corresponding electrons flow from the anode to the cathode through an external circuit to generate electrical energy.
It will be readily appreciated that in connection with the illustration of fig. 3, the entire flow of hydrogen from in-stack to out-stack in a hydrogen fuel cell can be considered a hydrogen system. And the components required for the hydrogen system are essentially determined at the design stage. The specific insulation performance of the hydrogen system can be known by establishing a corresponding insulation model according to the components and the pipelines involved in the hydrogen system. In the design period, the weak insulation place in the hydrogen system can be known according to the insulation model of the hydrogen system, and the hydrogen system can be adjusted according to the needs, so that the method is convenient and efficient, and the later period of production is avoided.
In particular, the hydrogen system includes components involved in the reaction, a valve body, and a flow-through conduit. As shown in fig. 3, the hydrogen gas is taken as a flowing medium, and reaches a hydrogen inlet electromagnetic valve 102 from a hydrogen gas source 101 through a pipeline, and reaches a hydrogen medium pressure sensor 103 through the pipeline, wherein the hydrogen medium pressure sensor 103 is connected with a proportional valve 104 through the pipeline; in order to improve the integration level, three components of the hydrogen inlet electromagnetic valve 102, the hydrogen medium pressure sensor 103 and the proportional valve 104 are generally integrated into a metal module, and the metal module is generally an aluminum alloy structural member as the hydrogen inlet module 105. At this time, the hydrogen in the pipeline does not enter the reactor, and the moisture content in the medium is small, so that the hydrogen can be regarded as dry gas. The proportional valve 104 is connected to the hydrogen gas inlet pressure sensor 106 via a pipe, and the pipe is connected to a hydrogen pump 109 which feeds the reacted mixture containing hydrogen gas, air and water to the inlet pipe again for reaction. From here on, the water content of the flow medium in the pipe starts to increase considerably, which can be regarded as a highly humid gas. Hydrogen enters the electric pile 107 to start reaction after passing through the hydrogen inlet pile pressure sensor 106, becomes a mixture containing hydrogen, air and water, flows out of the pile outlet pipeline, passes through the hydrogen outlet pile sensor 108 and then enters the water device 110; at this time, the temperature of the flowing medium in the pipeline is about 80 ℃, and the flowing medium is accompanied by liquid water and hydrogen which is not completely reacted; therefore, the water separator filters the liquid water in the flow medium, and the filtered mixed gas is returned to the stack pipeline by the hydrogen pump 109. The filtered mixed gas still contains a large amount of water. The water separator 110 is connected to a hydrogen discharge valve 111 and a drain valve 112 via pipes, respectively; the moisture device 110 structurally integrates a hydrogen discharge valve 111 and a drain valve 112 to form a moisture module 113, which is typically a plastic piece for improved insulation; the module can also be designed as a metal piece, and the mounting leg bolts are added with insulating bushings. The hydrogen discharge valve 111 and the drain valve 112 are connected to the tail drain 114 via pipes, respectively.
The components in the hydrogen system can be divided into a grounding component and a non-grounding component. The grounding component comprises a hydrogen pump and a hydrogen inlet module, namely a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the hydrogen pump is also called a hydrogen circulating pump, the hydrogen pump adopts a high-pressure hydrogen pump or a low-pressure hydrogen pump, the pump head of the hydrogen pump is mostly a metal piece, the high-pressure hydrogen pump shell is necessarily grounded, and the low-pressure hydrogen pump shell is in place.
The non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve.
Step 102: respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part;
in this embodiment, after the components in the hydrogen system are classified into the ground, it is determined which components are non-ground components. For non-grounded components, insulation resistance calculations are required. The insulation resistance of a non-grounded component can be obtained by detecting the insulation resistance of the component. In the prior art, insulation resistance detection is a mature technology, and this embodiment is not described in detail.
Step 103: performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of each section of pipeline;
it should be noted that in the prior art, when calculating the insulation resistance of the hydrogen system, the components involved in the hydrogen system are mainly considered, and the equivalent insulation resistance calculation of the pipeline is ignored. However, since the hydrogen fuel cell vehicle involves driving safety, it has a high requirement for insulation performance.
In the embodiment, when the insulation resistance calculation of the system is performed, the insulation resistance calculation of the components related to the hydrogen system is considered, and the equivalent insulation resistance calculation of the pipeline is also considered. And if later-stage needs to be subjected to insulation adjustment, as the related parts are mostly fixed, the pipeline adjustment is simpler, and the insulation adjustment effect is conveniently achieved. Therefore, the embodiment also performs insulation resistance equivalent treatment on the pipeline in the hydrogen system, and determines to obtain the equivalent insulation resistance of the pipeline.
Step 104: and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline.
With reference to fig. 4-5, the insulation resistance of the grounding component is 0, and when the insulation model of the hydrogen system is built, the insulation resistance of the grounding component does not need to be considered, and only the insulation resistance of each non-grounding component and the equivalent insulation resistance of each section of pipeline are integrated, so that the overall insulation resistance of the hydrogen system can be finally obtained, and the insulation model of the hydrogen system is built.
The above description is made of the detection of insulation resistance of components in the hydrogen system. For each section of pipeline in the hydrogen system, insulation resistance equivalent treatment is carried out, and the embodiment provides the following steps:
determining the medium in the pipeline, the length of the pipeline and the sectional area of the pipeline for each section of pipeline;
obtaining the conductivity of the pipeline according to the medium in the determined pipeline;
and determining the equivalent insulation resistance of the pipeline according to the conductivity of the pipeline, the length of the pipeline and the sectional area of the pipeline.
Wherein the conduit comprises a flow tube and a manifold. The flow pipe is a pipeline between the two parts, and the cross section of the flow pipe is mostly round. The manifold may also be referred to as a pipe manifold block, the cross-section of the manifold need not be circular, but could be square or otherwise shaped, which results in a difference in cross-sectional area between the flow tube and the manifold, affecting the equivalent insulation resistance calculation of the pipe.
The medium flowing through the duct may be dry air, moist air, or high-temperature and high-pressure air. The media circulated in the different pipes may vary in their moisture content.
In addition, in the pipe before stacking, the gas with low water content is mostly used, and in the pipe after stacking, the water content of the medium in the pipe after stacking is high because the internal flowing medium contains the water after reaction and the temperature is high and can reach 80 degrees.
Based on this, in the case of performing equivalent insulation resistance calculation of the pipeline, consideration is required in some cases. On one hand, the type of the pipeline is considered, and the sectional areas of different pipelines are different; on the other hand, the water content of the flowing medium in the pipeline is considered, and the conductivity of the medium is affected by the water content.
Optionally, determining the medium in the pipeline includes:
judging whether the pipeline is a pipeline before stacking;
if yes, the medium in the pipeline is dry gas;
if not, the medium in the pipeline is high humidity gas.
Specifically, as shown in connection with FIG. 3, the piping preceding the hydrogen in-stack pressure sensor may be considered an in-stack piping, and the in-stack piping does not include a portion of the piping for the hydrogen pump to access the hydrogen in-stack pressure sensor. The medium flowing in the stacking conduit is considered dry gas. The remaining pipes can then be regarded as the pipes coming out of the stack, and the medium flowing in this part of the pipes can be regarded as a highly humid gas.
After determining the type of the pipe and the medium flowing in the pipe, the equivalent insulation resistance of the pipe can be determined by the following formula according to the conductivity of the pipe, the length of the pipe, the sectional area of the pipe,
R＝L/(kσ*S)
wherein R is the equivalent insulation resistance of the pipeline, and L is the length of the pipeline; s is the cross-sectional area of the pipeline; σ is the conductivity of the hydrogen anode tail drain, and k is the medium coefficient. If the medium is a dry gas, k is 0.001; if the medium is a highly humid gas, k is 0.05.
Wherein the length of the conduit and the cross-sectional area of the conduit can be measured by physical or 3D. The embodiment takes the conductivity sigma of the hydrogen anode tail drain as a reference, and multiplies different coefficients k on the basis of the conductivity sigma of the hydrogen anode tail drain according to the difference of the water content in the medium. It should be noted that the value of the coefficient k is based on the source of multiple conductivity test experiments. The conductivity of the hydrogen anode tail drain can be calculated through multiple experimental measurements.
Specifically, as shown in fig. 4 and 5, the inside of the in-stack pipe is dry gas, the conductivity may be 0.001×σ when calculating the resistance value of the equivalent insulation resistance R106, and the other out-stack pipes are high-humidity gas, and the conductivity may be 0.05×σ when calculating the resistance values of the equivalent insulation resistances R100, R101, R102, R103, R104, R105, and R107.
R500 is the insulation resistance of the hydrogen fuel cell controller FCCU, and because the FCCU is a low-voltage controller, the inside of the FCCU is not isolated, namely the power ground and the shell are commonly grounded, so the insulation resistance of R500 is 0, and R120 and R128 are the insulation resistance of the low-voltage line of the sensor to the shell, and can be measured. R125, R126, R127 are integrated on the moisture module 113, and if the moisture module 113 is a metal piece, three values of R125, R126, R127 are 0. If the moisture module 113 is a plastic or metal piece with insulation pads, then R125, R126, R127 are low voltage line to housing insulation resistances.
In this embodiment, after the equivalent insulation resistances of the components and the pipes in the hydrogen system are obtained, the equivalent insulation resistance of the entire hydrogen system can be calculated. Referring to fig. 5, in the electrical simulation software, a circuit diagram is drawn according to fig. 4, then a dc power supply 121 is added to the circuit, and an ammeter 120 is connected in series to the main circuit, so that the equivalent insulation resistance of the whole hydrogen system can be calculated.
In summary, the method for establishing an insulation model according to the embodiments of the present disclosure distinguishes between a grounded component and a non-grounded component in a hydrogen system; respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part; performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of the pipeline; and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline. Therefore, according to the established hydrogen insulation model, the weak place of the hydrogen system can be clearly reflected, so that insulation improvement measures can be pertinently implemented; moreover, the insulation index can be quantized through the hydrogen insulation model, the problems of difficult insulation risk, unclear index and the like of the hydrogen fuel cell at present are solved, the development time is shortened, and the method has milestone significance for the insulation design of the hydrogen fuel cell.
Based on the same inventive concept, the embodiment of the invention also provides an insulation model building device, which comprises a distinguishing module, a detecting module, an equivalent module and a model building module.
The distinguishing module is used for distinguishing the grounding part and the non-grounding part in the hydrogen system;
the detection module is used for respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part;
the equivalent module is used for carrying out insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of the pipeline;
the model building module is used for building an insulation model of the hydrogen system according to the insulation resistance of each non-grounded component and the equivalent insulation resistance of each section of pipeline.
Optionally, the grounding component comprises a hydrogen pump, a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve.
In an alternative embodiment, the equivalent module is further configured to:
determining the medium in the pipeline, the length of the pipeline and the sectional area of the pipeline for each section of pipeline;
obtaining the conductivity of the pipeline according to the medium in the determined pipeline;
and determining the equivalent insulation resistance of the pipeline according to the conductivity of the pipeline, the length of the pipeline and the sectional area of the pipeline.
Optionally, the conduit comprises a flow tube and a manifold.
In an alternative embodiment, the equivalent module is further configured to:
judging whether the pipeline is a pipeline before stacking;
if yes, the medium in the pipeline is dry gas;
if not, the medium in the pipeline is high humidity gas.
In an alternative embodiment, the equivalent module is further configured to:
the equivalent insulation resistance of the pipe is determined by the following formula:
R＝L/(kσ*S)
wherein R is the equivalent insulation resistance of the pipeline, and L is the length of the pipeline; s is the cross-sectional area of the pipeline; σ is the conductivity of the hydrogen anode tail drain, and k is the medium coefficient.
Alternatively, if the medium is a dry gas, k takes 0.001; if the medium is a highly humid gas, k is 0.05.
In summary, the embodiment of the present disclosure provides an insulation model building apparatus, by distinguishing a grounding component and a non-grounding component in a hydrogen system; respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part; performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of the pipeline; and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded part and the equivalent insulation resistance of each pipeline. Thus, according to the established hydrogen insulation model, the weak insulation items of the hydrogen system can be clearly reflected, so that insulation improvement measures are pertinently implemented; in addition, the hydrogen insulation model can quantify insulation indexes, solves the problems of difficult insulation risk, unclear indexes and the like of the current hydrogen fuel cell, shortens development time, and has milestone significance for the insulation design of the hydrogen fuel cell.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the insulation model building device described above may refer to the corresponding process in the foregoing method, and will not be described in detail herein.
On the basis of the above, the present embodiment provides a readable storage medium, on which a computer program is stored, which when executed by a processor, implements the insulation model building method of any one of the foregoing embodiments.
It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to corresponding procedures in the foregoing method for the specific working procedure of the readable storage medium described above, and thus, redundant description is not necessary.
The above is merely various embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present invention, and the changes and substitutions are intended to be covered in the protection scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. An insulation model building method is characterized by being applied to a hydrogen system of a hydrogen fuel cell; the method comprises the following steps:
distinguishing between grounded and non-grounded components in a hydrogen system; the grounding component comprises a hydrogen pump, a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve;
respectively detecting the insulation resistance of each non-grounded component to obtain the insulation resistance of each non-grounded component;
performing insulation resistance equivalent treatment on each section of pipeline in the hydrogen system, and determining to obtain the equivalent insulation resistance of each section of pipeline;
and establishing an insulation model of the hydrogen system according to the insulation resistance of each non-grounded component and the equivalent insulation resistance of each pipeline.
2. The method of claim 1, wherein the performing insulation resistance equivalent processing on each section of the pipeline in the hydrogen system to determine an equivalent insulation resistance of each section of the pipeline comprises:
determining the medium in the pipeline, the length of the pipeline and the sectional area of the pipeline for each section of pipeline;
obtaining the conductivity of the pipeline according to the medium in the pipeline;
and determining the equivalent insulation resistance of the pipeline according to the conductivity of the pipeline, the length of the pipeline and the sectional area of the pipeline.
3. The method of claim 2, wherein the conduit comprises a flow tube and a manifold.
4. A method according to claim 2 or 3, wherein said determining the medium in the pipeline comprises:
judging whether the pipeline is a pipeline before stacking;
if yes, the medium in the pipeline is dry gas;
if not, the medium in the pipeline is high humidity gas.
5. The method of claim 2, wherein determining the equivalent insulation resistance of the conduit based on the electrical conductivity of the conduit, the length of the conduit, the cross-sectional area of the conduit, comprises:
the equivalent insulation resistance of the pipe is determined by the following formula:
R＝L/(kσ*S)
wherein R is the equivalent insulation resistance of the pipeline, and L is the length of the pipeline; s is the cross-sectional area of the pipeline; σ is the conductivity of the hydrogen anode tail drain, and k is the medium coefficient.
6. The method of claim 5, wherein k is 0.001 if the medium is a dry gas.
7. The method of claim 5, wherein k is 0.05 if the medium is a high moisture gas.
8. An insulation model building apparatus, characterized by comprising:
the distinguishing module is used for distinguishing the grounding part and the non-grounding part in the hydrogen system; the grounding component comprises a hydrogen pump, a hydrogen inlet electromagnetic valve, a hydrogen medium pressure sensor and a proportional valve; the non-grounding component comprises a hydrogen inlet pile pressure sensor, a galvanic pile, a hydrogen outlet pile sensor, a water device, a hydrogen discharge valve and a drain valve;
the detection module is used for respectively detecting the insulation resistance of each non-grounding part to obtain the insulation resistance of each non-grounding part;
the equivalent module is used for carrying out insulation resistance equivalent treatment on each section of pipeline in the hydrogen system and determining to obtain the equivalent insulation resistance of each section of pipeline;
the model building module is used for building an insulation model of the hydrogen system according to the insulation resistance of each non-grounded component and the equivalent insulation resistance of each section of pipeline.
9. An electronic device, the electronic device comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the insulation model building method according to any one of claims 1-7 when executing the computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which program, when being executed by a processor, implements the insulation model building method according to any one of claims 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117332740A (en) * | 2023-12-01 | 2024-01-02 | 武汉氢能与燃料电池产业技术研究院有限公司 | Fuel cell system insulation design method and device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117332740A (en) * | 2023-12-01 | 2024-01-02 | 武汉氢能与燃料电池产业技术研究院有限公司 | Fuel cell system insulation design method and device and electronic equipment |
| CN117332740B (en) * | 2023-12-01 | 2024-02-23 | 武汉氢能与燃料电池产业技术研究院有限公司 | Fuel cell system insulation design method and device and electronic equipment |
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