CN221100812U - Hydrogen fuel cell detection system - Google Patents
Hydrogen fuel cell detection system Download PDFInfo
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- CN221100812U CN221100812U CN202322452609.XU CN202322452609U CN221100812U CN 221100812 U CN221100812 U CN 221100812U CN 202322452609 U CN202322452609 U CN 202322452609U CN 221100812 U CN221100812 U CN 221100812U
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- 239000000446 fuel Substances 0.000 title claims abstract description 77
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000001257 hydrogen Substances 0.000 title claims abstract description 73
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 73
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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Classifications
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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 application provides a detection system of a hydrogen fuel cell, comprising: a bipolar plate comprising a bipolar plate body and a preformed hole penetrating into the bipolar plate body; the thermocouple comprises a contact pin structure, wherein the contact pin structure comprises a conductive shell, a thermocouple loop and an insulating structure, the conductive shell is provided with an accommodating space, a plurality of through holes which are distributed at intervals are formed in the surface of the conductive shell, the conductive shell is positioned in the preformed hole and is in contact with the inner wall of the preformed hole, a first end of a first hot electrode in the thermocouple loop is connected with a first end of a second hot electrode, at least part of the first hot electrode and at least part of the second hot electrode are positioned in the accommodating space, and the insulating structure is positioned in the accommodating space between the thermocouple loop and the conductive shell; the temperature measuring instrument is used for displaying the temperature value measured by the thermocouple loop; the voltage measuring instrument is used for displaying the voltage value of the bipolar plate. The application solves the problem that the temperature and voltage data inside the hydrogen fuel cell are difficult to detect.
Description
Technical Field
The application relates to the field of hydrogen fuel cells, in particular to a detection system of a hydrogen fuel cell.
Background
During the cold start phase, the temperature profile and voltage profile of the hydrogen fuel cell stack have a significant impact on its performance and life. At present, most of the fuel cell power supplies only can measure the overall output performance of the fuel cell power supplies, and internal real-time temperature and voltage data cannot be known exactly.
Disclosure of utility model
The application mainly aims to provide a detection system of a hydrogen fuel cell, which is used for solving the problem that the temperature and voltage data inside the hydrogen fuel cell are difficult to detect in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a detection system for a hydrogen fuel cell, comprising: a hydrogen fuel cell comprising a bipolar plate body and a preformed hole extending into the bipolar plate body; the detection equipment comprises a contact pin structure, wherein the contact pin structure comprises a conductive shell, a thermocouple loop and an insulation structure, the conductive shell is provided with an accommodating space, a plurality of through holes which are distributed at intervals are formed in the surface of the conductive shell, the conductive shell is positioned in the reserved hole and is in contact with the inner wall of the reserved hole, the thermocouple loop comprises a first hot electrode and a second hot electrode, the first end of the first hot electrode is connected with the first end of the second hot electrode, at least part of the first hot electrode and the second hot electrode are positioned in the accommodating space, and the insulation structure is positioned in the accommodating space between the thermocouple loop and the conductive shell; the temperature measuring instrument is electrically connected with the second end of the first thermal electrode and the second end of the second thermal electrode through the through hole respectively and is used for displaying the temperature value measured by the thermocouple circuit; and the voltage measuring instrument is electrically connected with the conductive shell and is used for displaying the voltage value of the bipolar plate.
Optionally, the detection device further includes: the lead set comprises a voltage connecting lead, a first temperature connecting lead and a second temperature connecting lead, wherein the first end of the voltage connecting lead is electrically connected with the conductive shell, and the second end of the voltage connecting lead is electrically connected with the voltage measuring instrument; the first end of the first temperature connecting wire is electrically connected with the second end of the first hot electrode, and the second end of the first temperature connecting wire is electrically connected with the temperature measuring instrument; the first end of the second temperature connecting wire is electrically connected with the second end of the second hot electrode, and the second end of the second temperature connecting wire is electrically connected with the temperature measuring instrument.
Optionally, the bipolar plate body is provided with a plurality of preformed holes, the pin structures in the detection device are provided with a plurality of preformed holes, the pin structures are located in the preformed holes in a one-to-one correspondence manner, each pin structure is respectively and electrically connected with the temperature measuring instrument and the voltage measuring instrument, the temperature measuring instrument is used for displaying a plurality of temperature values, and the voltage measuring instrument is used for displaying a plurality of voltage values.
Optionally, the bipolar plate body includes a gas inlet and a gas outlet on different sides, a portion of the plurality of preformed holes are located in the bipolar plate body on the gas inlet side, and the remaining portion of the plurality of preformed holes are located in the bipolar plate body on the gas outlet side.
Optionally, the bipolar plate has a plurality of, corresponds the preformed hole has a plurality of, in the check out test set contact pin structure has a plurality of, contact pin structure one-to-one is located in the preformed hole, each contact pin structure with temperature measuring instrument and voltage measuring instrument are electric connection respectively, temperature measuring instrument is used for showing a plurality of the temperature value, voltage measuring instrument is used for showing a plurality of the voltage value.
Optionally, the second end of the first hot electrode is a working end of the thermocouple loop, the second end of the second hot electrode is a reference end of the thermocouple loop, and the working end and the reference end penetrate through the through holes in a one-to-one correspondence manner to be located outside the conductive shell and located on one side, far away from the reserved hole, of the conductive shell.
Optionally, the insulating structure includes: a first insulating layer covering the inner wall of the through hole; and a second insulating layer filled in the accommodation space between the thermocouple loop and the conductive housing.
Optionally, the conductive housing is a cylindrical conductive housing.
Optionally, the outer diameter of the cylindrical conductive shell is 0.2 mm-15 mm.
Optionally, the number of the pin structures is 15-40.
By applying the technical scheme of the application, in the detection system of the hydrogen fuel cell, the contact pin structure is inserted into the bipolar plate reserved hole of the hydrogen fuel cell, so that the measurement of the temperature data of the bipolar plate can be realized through the thermocouple loop in the contact pin structure, the measurement of the voltage data of the bipolar plate can be realized through the conductive shell in the contact pin structure, the problem that the temperature and the voltage data inside the hydrogen fuel cell are difficult to detect is effectively solved, the voltage and the temperature distribution condition on the bipolar plate of the hydrogen fuel cell in the cold starting process can be obtained through analyzing the measured temperature and voltage data, the thermal management strategy of the hydrogen fuel cell stack can be optimized, and the performance and the service life of the system are improved. In addition, the application can obtain the temperature and voltage data of the bipolar plate of the hydrogen fuel cell at the same time, and compared with the existing single temperature measurement structure or single voltage measurement structure, the application simplifies the temperature and voltage measurement steps of the hydrogen fuel cell.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic configuration diagram of a detection system of a hydrogen fuel cell according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of a pin structure according to an embodiment of the present application;
FIG. 3 shows a schematic diagram of the connection of a temperature data acquisition structure according to an embodiment of the application;
FIG. 4 shows a schematic structural view of a temperature measuring instrument according to an embodiment of the present application;
FIG. 5 shows a schematic diagram of the connection of a voltage data acquisition structure according to an embodiment of the application;
Fig. 6 shows a schematic structural diagram of a voltage measuring instrument according to an embodiment of the present application.
Wherein the above figures include the following reference numerals:
10. A bipolar plate body; 11. a preformed hole; 20. a pin structure; 21. a conductive housing; 22. a thermocouple loop; 221. a first thermode; 222. a second thermode; 23. an insulating structure; 231. a second insulating layer; 232. a first insulating layer; 30. a temperature measuring instrument; 301. a temperature data acquisition structure; 302. a temperature data processing structure; 303. a temperature display; 40. a voltage measuring instrument; 401. a voltage data acquisition structure; 402. a voltage data processing structure; 403. a voltage display; 50. a wire set; 501. a voltage connection wire; 502. a first temperature connecting wire; 503. the second temperature is connected to the wire.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
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 application. 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.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, the prior art has a problem that it is difficult to detect temperature and voltage data inside the hydrogen fuel cell, and in order to solve the above technical problem, the present application proposes a detection system for a hydrogen fuel cell.
According to an exemplary embodiment of the present application, there is provided a detection system of a hydrogen fuel cell as shown in fig. 1, including:
A hydrogen fuel cell comprising a bipolar plate body 10 and a preformed hole 11 extending through said bipolar plate body 10;
Specifically, the hydrogen fuel cell is a hydrogen fuel cell stack, and is an electrochemical device that directly converts chemical energy of externally supplied hydrogen fuel and oxidant into electric energy and generates heat and reaction products. The hydrogen fuel cell stack comprises a plurality of single cells which are stacked in sequence, wherein each single cell comprises two bipolar plates and a membrane electrode, and the two bipolar plates are respectively positioned at two sides of the membrane electrode. The bipolar plate is also called a collector plate and is used for providing a gas flow channel, preventing hydrogen and oxygen in a cell air chamber from being communicated, and establishing a current path between a cathode membrane electrode and an anode membrane electrode which are connected in series.
The detection device comprises a pin structure 20, wherein the pin structure 20 comprises a conductive shell 21, a thermocouple circuit 22 and an insulation structure 23, the conductive shell 21 is provided with an accommodating space, a plurality of through holes are distributed on the surface of the conductive shell 21 at intervals, the conductive shell 21 is positioned in the preformed hole 11 and is in contact with the inner wall of the preformed hole 11, the thermocouple circuit 22 comprises a first thermal electrode 221 and a second thermal electrode 222, the first end of the first thermal electrode 221 is connected with the first end of the second thermal electrode 222, at least part of the first thermal electrode 221 and the second thermal electrode 222 are positioned in the accommodating space, and the insulation structure 23 is positioned in the accommodating space between the thermocouple circuit 22 and the conductive shell 21 at least;
Specifically, the outer diameter of the conductive housing of the pin structure is smaller than the inner diameter of the preformed hole, and the pin structure can be inserted into the preformed hole or pulled out of the preformed hole. The first thermode and the second thermode are conductors or semiconductors made of different materials, and when a temperature gradient exists between the first thermode and the second thermode, a current flows through the thermocouple circuit, and a thermoelectromotive force exists between the first thermode and the second thermode. The insulating structure is used for isolating the thermocouple loop from the inner wall of the conductive shell so as to prevent the thermocouple loop from contacting with the inner wall of the conductive shell.
A temperature measuring instrument 30 electrically connected to the second end of the first heat electrode 221 and the second end of the second heat electrode 222 through the through holes, respectively, for displaying the temperature value measured by the thermocouple circuit 22;
specifically, the temperature measuring instrument obtains and displays a temperature value measured by the thermocouple loop through the functional relation between the thermoelectromotive force and the temperature, and the temperature value is the real-time temperature of the bipolar plate.
The voltage measuring instrument 40 is electrically connected to the conductive housing 21 and displays the voltage value of the bipolar plate.
Specifically, the voltage measuring instrument calculates and displays the voltage value of the bipolar plate according to the electric signal flowing through the conductive shell.
In the above-mentioned detecting system for a hydrogen fuel cell, the bipolar plate body of the hydrogen fuel cell has a preformed hole, the pin structure in the detecting device includes a conductive housing, a thermocouple loop located in the conductive housing, and an insulating structure located in the conductive housing and separating the thermocouple loop from an inner wall of the conductive housing, the pin structure can be inserted into the preformed hole, the real-time temperature of the bipolar plate is detected through the thermocouple loop, a voltage signal of the bipolar plate is transmitted through the conductive housing in contact with the preformed hole, the real-time temperature is displayed through a temperature measuring instrument electrically connected with the thermocouple loop, and the voltage of the bipolar plate is displayed through a voltage measuring instrument electrically connected with the conductive housing, so that the temperature and the voltage of the bipolar plate are measured. Compared with the prior art that the temperature and voltage data inside the hydrogen fuel cell can not be detected, the contact pin structure of the application can not only realize the measurement of the temperature data of the bipolar plate through the thermocouple loop, but also realize the measurement of the voltage data of the bipolar plate through the conductive shell by inserting the contact pin structure into the bipolar plate preformed hole of the hydrogen fuel cell, thereby effectively solving the problem that the temperature and voltage data inside the hydrogen fuel cell are difficult to detect, and the voltage and temperature distribution condition on the bipolar plate of the hydrogen fuel cell in the cold starting process can be obtained by analyzing the temperature and voltage data obtained by measurement, thereby helping to optimize the thermal management strategy of the hydrogen fuel cell stack, and improving the performance and service life of the system. In addition, the application can obtain the temperature and voltage data of the bipolar plate of the hydrogen fuel cell at the same time, and compared with the existing single temperature measurement structure or single voltage measurement structure, the application simplifies the temperature and voltage measurement steps of the hydrogen fuel cell.
In a specific application process, the thermocouple loop, the conductive shell and the insulating structure can form a solid combined contact pin structure through stretching processing. The conductive shell plays a role in protecting a thermocouple loop and playing a role in voltage inspection. The material of the conductive shell can be a metal material, such as copper, and the like, and can also be an alloy material; the material of the insulating structure may be silicon dioxide, rubber material, or other insulating material, and an insulating material having a certain stretchability may be selected as the material of the insulating structure. The first end of the first hot electrode and the first end of the second hot electrode in the thermocouple loop are connected together through welding.
In order to further ensure that more comprehensive and accurate temperature distribution information and voltage distribution information of the hydrogen fuel cell are provided, optionally, as shown in fig. 1, there are a plurality of the preformed holes 11 on one bipolar plate body 10, a plurality of the pin structures 20 in the detecting device, the pin structures 20 are located in the preformed holes 11 in a one-to-one correspondence, each of the pin structures 20 is electrically connected to the temperature measuring instrument 30 and the voltage measuring instrument 40, the temperature measuring instrument 30 is used for displaying a plurality of the temperature values, and the voltage measuring instrument 40 is used for displaying a plurality of the voltage values. The preset holes are formed in the positions of the bipolar plate, and the contact pin structures are inserted into the preset holes to detect the temperature distribution condition and the voltage distribution condition of the different positions of the bipolar plate, so that the method is further beneficial to optimizing the thermal management and the performance of the hydrogen fuel cell.
The preformed holes may be uniformly distributed on the bipolar plate body or may be irregularly distributed on the bipolar plate body.
In a more specific embodiment, as shown in fig. 1, the bipolar plate body 10 includes a gas inlet and a gas outlet on different sides, and a part of the plurality of preformed holes 11 is located in the bipolar plate body 10 on the gas inlet side, and the rest of the plurality of preformed holes 11 is located in the bipolar plate body 10 on the gas outlet side. By collecting temperature data and voltage data of the gas inlet and the gas outlet of the bipolar plate, temperature change and voltage change of the single cell inlet and outlet are obtained, the problem that temperature and voltage data inside a hydrogen fuel cell are difficult to detect in the prior art is further solved, and analysis and promotion of performance and service life of the hydrogen fuel cell according to temperature distribution and voltage distribution are further facilitated.
In order to achieve the acquisition of real-time temperature and voltage data inside each single cell in the hydrogen fuel cell, in still other alternative schemes of the application, the bipolar plates are multiple, each bipolar plate comprises at least one reserved hole, therefore, the corresponding reserved holes are also multiple, the pin structures in the detection device are multiple, the pin structures are located in the reserved holes in a one-to-one correspondence manner, each pin structure is electrically connected with the temperature measuring instrument and the voltage measuring instrument, the temperature measuring instrument is used for displaying a plurality of temperature values, and the voltage measuring instrument is used for displaying a plurality of voltage values. The method further realizes the real-time measurement of the temperature and the voltage of the bipolar plate of each single cell in the hydrogen fuel cell stack, and further provides a certain theory and application value for fault diagnosis of each partial zone of the hydrogen fuel cell, understanding of the dynamic response rule and the electrochemical reaction mechanism of the hydrogen fuel cell, researching the durability and the attenuation rule and predicting the service life of the hydrogen fuel cell.
According to the obtained temperature value and voltage value of each single cell, a temperature change diagram and a voltage change diagram of an inlet and an outlet of each single cell in the cold starting process can be drawn to help optimize the thermal management and the performance of the fuel cell stack.
In addition, the number and position of the preformed holes on the bipolar plate of each single cell and the number and position of the preformed holes on the bipolar plate of each single cell can be flexibly set and adjusted according to practical situations by the person skilled in the art to meet the requirements of testing the temperature and the voltage of each part of the hydrogen fuel cell stack, and the application is not particularly limited.
According to another exemplary embodiment of the present application, as shown in fig. 1 and 2, the above-mentioned detecting apparatus further includes: a wire group 50 including a voltage connection wire 501, a first temperature connection wire 502, and a second temperature connection wire 503, wherein a first end of the voltage connection wire 501 is electrically connected to the conductive housing, and a second end of the voltage connection wire 501 is electrically connected to the voltage measuring instrument; a first end of the first temperature connection wire 502 is electrically connected to a second end of the first thermode, and a second end of the first temperature connection wire 502 is electrically connected to the temperature measuring instrument; the first end of the second temperature connection wire 503 is electrically connected to the second end of the second hot electrode, and the second end of the second temperature connection wire 503 is electrically connected to the temperature measuring instrument. The pin structure and the temperature measuring instrument are connected through the first temperature connecting wire and the second temperature connecting wire, and the pin structure and the voltage measuring instrument are connected through the voltage connecting wire, so that the position relation of the temperature measuring instrument and the voltage measuring instrument relative to the pin structure can be more flexible.
In practical applications, the thermocouple circuit may be located in the accommodating space entirely, the wire set is electrically connected to the thermocouple circuit through a through hole in the conductive housing, and of course, the thermocouple circuit may also be located only partially in the accommodating space, as shown in fig. 1, and according to still other exemplary embodiments, the second end of the first heat electrode 221 is a working end of the thermocouple circuit 22, the second end of the second heat electrode 222 is a reference end of the thermocouple circuit 22, and the working end and the reference end are located outside the conductive housing 21 through the through hole in a one-to-one correspondence, and are located on a side of the conductive housing 21 away from the reserved hole 11. That is, the pin structure is inserted into the preformed hole along a predetermined direction from a side of the conductive housing where the through hole is provided to a side of the conductive housing where the through hole is not provided, and the working end and the reference end are located outside the conductive housing, or may be located outside the preformed hole or inside the preformed hole, depending on a size relationship between a length of the conductive housing in the predetermined direction and a depth of the preformed hole, that is, when the length of the conductive housing in the predetermined direction is greater than the depth of the preformed hole, after the pin structure is inserted into the preformed hole, a part of the conductive housing, the working end, and the reference end are located outside the preformed hole, and when a length of the conductive housing in the predetermined direction is smaller than the depth of the preformed hole, the pin structure is completely located in the preformed hole after the conductive housing is inserted into the preformed hole, and the working end and the reference end are also located in the preformed hole.
In order to further avoid the thermocouple loop from contacting the inner wall of the conductive housing and thus affecting the voltage value testing accuracy of the bipolar plate, in the embodiment of the present application, as shown in fig. 1, the insulating structure 23 includes: a first insulating layer 232 covering the inner wall of the through hole; a second insulating layer 231 filled in the accommodation space between the thermocouple circuit 22 and the conductive housing 21.
When all the thermocouple loops are located in the conductive housing, the first temperature connecting wire and the second temperature connecting wire pass through the through hole to enter the conductive housing to be electrically connected with the thermocouple loops, and the shells of the first temperature connecting wire and the second temperature connecting wire are made of insulating materials, the insulating structure may only include the second insulating layer, i.e. the first insulating layer is omitted.
And under the condition that all the thermocouple loops are positioned in the conductive shell, a first temperature connecting wire and a second temperature connecting wire penetrate through the through hole to enter the conductive shell to be electrically connected with the thermocouple loops, and under the condition that the shells of the first temperature connecting wire and the second temperature connecting wire are made of conductive materials, the insulating structure comprises the first insulating layer and the second insulating layer, and the first insulating layer can prevent the first temperature connecting wire and the second temperature connecting wire from contacting with the inner wall of the through hole, namely, the first temperature connecting wire and the second temperature connecting wire from contacting with the conductive shell.
In order to adapt to the shape of the preformed hole, the conductive shell can be easily inserted into the preformed hole and can be better contacted with the preformed hole, so that the measured voltage value of the bipolar plate is further ensured to be more accurate, and optionally, the conductive shell is a cylindrical conductive shell. Of course, the shape of the conductive housing is not limited to the cylindrical conductive housing, and may be other shapes, such as a rectangular parallelepiped, a square, a sphere, or other irregular shapes. The present application is not particularly limited thereto.
Further, as shown in fig. 1, the cylindrical conductive housing specifically includes: a conductive sleeve with two ends communicated; a first conductive bottom surface, the surface of the first conductive bottom surface having two spaced through holes through which the working ends and the reference ends pass in one-to-one correspondence, the first conductive bottom surface being located at one end of the conductive sleeve; the second conductive bottom surface is positioned at the other end of the conductive sleeve, the first conductive bottom surface and the second conductive bottom surface enclose the accommodating space, and the thickness of the second conductive bottom surface is larger than that of the first conductive bottom surface.
The outer diameter of the cylindrical conductive shell and the inner diameter of the preformed hole can be flexibly set according to actual design by a person skilled in the art, and the cylindrical conductive shell can be contacted with the preformed hole only by ensuring that the outer diameter of the cylindrical conductive shell is smaller than the inner diameter of the preformed hole. In a specific embodiment, the outer diameter of the cylindrical conductive housing is 0.2mm to 15mm.
Specifically, the number of pin structures corresponds to the number of bipolar plates. In order to further realize temperature and voltage measurement of the hydrogen fuel cell stack and ensure low manufacturing cost of the detection system, in another alternative, the number of the pin structures is 15-40.
The temperature and voltage measuring devices described above are any suitable measuring devices in the prior art, and in alternative embodiments, as shown in fig. 3 and 4, the temperature measuring device 30 includes a temperature data acquisition structure 301, a temperature data processing structure 302 (also called a thermocouple measuring device), and a temperature display 303, and as shown in fig. 5 and 6, the voltage measuring device 40 includes a voltage data acquisition structure 401, a voltage data processing structure 402 (also called a voltage patrol device), and a voltage display 403.
The input end of the temperature data collection structure 301 is electrically connected to the first temperature connection wire and the second temperature connection wire, the output end of the temperature data collection structure 301 is electrically connected to the input end of the temperature data processing structure 302, the temperature data collection structure 301 is configured to collect an actual thermal electromotive force between the first thermal electrode and the corresponding second thermal electrode, the output end of the temperature data processing structure 302 is electrically connected to the temperature display 303, and the temperature data processing structure 302 is configured to calculate a temperature value corresponding to the actual thermal electromotive force according to a functional relationship between the thermal electromotive force and temperature, and send the temperature value to the temperature display 303, so that the temperature display 303 displays the temperature value.
The input end of the voltage data acquisition structure 401 is electrically connected with the voltage connection wire, the output end of the voltage data acquisition structure 401 is electrically connected with the input end of the voltage data processing structure 402, the voltage data acquisition structure 401 is used for acquiring an electric signal on the voltage connection wire, the output end of the voltage data processing structure 402 is electrically connected with the voltage display 403, and the voltage data processing structure 402 is used for converting the electric signal into a corresponding voltage value and transmitting the voltage value to the voltage display 403 so that the voltage display 403 displays the voltage value.
Specifically, the temperature data collecting structure and the voltage data collecting structure are separate module structures, and may be integrated on a substrate, for example, as shown in fig. 3 and 5, where the temperature data collecting structure is located on the front surface of the substrate, and the voltage data collecting structure is located on the back surface of the substrate. The temperature data processing structure and the voltage data processing structure may be separate module structures or may be integrated into one module structure. Further, the above-described hydrogen fuel cell of the present application may be any type of hydrogen fuel cell, such as a proton membrane fuel cell stack or the like.
In the prior art, the current density and the temperature of the fuel cell are measured by embedding the current density sampling resistor and the thermistor into the circuit board and then placing the circuit board on the anode, but the technology of embedding the resistor at home and abroad is not mature at present, the manufacturing cost is expensive, the precision of the embedded resistor value is difficult to control, the circuit board is additionally calibrated with the embedded resistor of the partition test board by resistor calibration equipment, the measurement difficulty is increased, in addition, the measurement of the temperature of the battery is not carried out on the cathode, the thermal conductivity coefficient of the epoxy resin material of the circuit board is only 0.2103W/mK, and the embedded thermistor layer and the upper surface of the partition test board have a certain distance, so that the temperature change inside the battery cannot be accurately measured. Compared with the mode, the detection system of the hydrogen fuel cell disclosed by the application has the advantages that the pin structure is inserted into the reserved control of the bipolar plate, the real-time measurement of the temperature and voltage data is simultaneously carried out, the structure is simple, the operation is convenient, the measurement data is accurate and reliable, the temperature distribution condition and the voltage distribution condition of each single cell in the cold starting process of the hydrogen fuel cell stack can be accurately provided, the optimization of the thermal management strategy of the hydrogen fuel cell stack can be facilitated, and the performance and the service life of the system are improved.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
In the detection system of the hydrogen fuel cell, the bipolar plate body of the hydrogen fuel cell is provided with the preformed hole, the pin structure in the detection equipment comprises a conductive shell, a thermocouple loop positioned in the conductive shell and an insulation structure positioned in the conductive shell and separating the thermocouple loop from the inner wall of the conductive shell, the pin structure can be inserted into the preformed hole, the real-time temperature of the bipolar plate is detected through the thermocouple loop, a voltage signal of the bipolar plate is transmitted through the conductive shell contacted with the preformed hole, the real-time temperature is displayed through a temperature measuring instrument electrically connected with the thermocouple loop, and the voltage of the bipolar plate is displayed through a voltage measuring instrument electrically connected with the conductive shell, so that the temperature and the voltage of the bipolar plate are measured. Compared with the prior art that the temperature and voltage data inside the hydrogen fuel cell can not be detected, the contact pin structure of the application can not only realize the measurement of the temperature data of the bipolar plate through the thermocouple loop, but also realize the measurement of the voltage data of the bipolar plate through the conductive shell by inserting the contact pin structure into the bipolar plate preformed hole of the hydrogen fuel cell, thereby effectively solving the problem that the temperature and voltage data inside the hydrogen fuel cell are difficult to detect, and the voltage and temperature distribution condition on the bipolar plate of the hydrogen fuel cell in the cold starting process can be obtained by analyzing the temperature and voltage data obtained by measurement, thereby helping to optimize the thermal management strategy of the hydrogen fuel cell stack, and improving the performance and service life of the system. In addition, the application can obtain the temperature and voltage data of the bipolar plate of the hydrogen fuel cell at the same time, and compared with the existing single temperature measurement structure or single voltage measurement structure, the application simplifies the temperature and voltage measurement steps of the hydrogen fuel cell.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A hydrogen fuel cell detection system, comprising:
A hydrogen fuel cell comprising a bipolar plate body and a preformed hole extending into the bipolar plate body;
The detection equipment comprises a contact pin structure, wherein the contact pin structure comprises a conductive shell, a thermocouple loop and an insulation structure, the conductive shell is provided with an accommodating space, a plurality of through holes which are distributed at intervals are formed in the surface of the conductive shell, the conductive shell is positioned in the reserved hole and is in contact with the inner wall of the reserved hole, the thermocouple loop comprises a first hot electrode and a second hot electrode, the first end of the first hot electrode is connected with the first end of the second hot electrode, at least part of the first hot electrode and the second hot electrode are positioned in the accommodating space, and the insulation structure is positioned in the accommodating space between the thermocouple loop and the conductive shell;
the temperature measuring instrument is electrically connected with the second end of the first thermal electrode and the second end of the second thermal electrode through the through hole respectively and is used for displaying the temperature value measured by the thermocouple circuit;
And the voltage measuring instrument is electrically connected with the conductive shell and is used for detecting and displaying the voltage value of the bipolar plate.
2. The detection system of a hydrogen fuel cell according to claim 1, wherein the detection apparatus further comprises:
The lead set comprises a voltage connecting lead, a first temperature connecting lead and a second temperature connecting lead, wherein the first end of the voltage connecting lead is electrically connected with the conductive shell, and the second end of the voltage connecting lead is electrically connected with the voltage measuring instrument; the first end of the first temperature connecting wire is electrically connected with the second end of the first hot electrode, and the second end of the first temperature connecting wire is electrically connected with the temperature measuring instrument; the first end of the second temperature connecting wire is electrically connected with the second end of the second hot electrode, and the second end of the second temperature connecting wire is electrically connected with the temperature measuring instrument.
3. The hydrogen fuel cell detection system according to claim 1, wherein a plurality of the preformed holes are provided in one bipolar plate body, a plurality of the pin structures are provided in the detection device, the pin structures are located in the preformed holes in one-to-one correspondence, each of the pin structures is electrically connected with the temperature measuring instrument and the voltage measuring instrument, respectively, the temperature measuring instrument is used for displaying a plurality of the temperature values, and the voltage measuring instrument is used for displaying a plurality of the voltage values.
4. The hydrogen fuel cell detection system according to claim 3, wherein the bipolar plate body includes a gas inlet and a gas outlet on different sides, a portion of the plurality of preformed holes being located in the bipolar plate body on the gas inlet side, and a remaining portion of the plurality of preformed holes being located in the bipolar plate body on the gas outlet side.
5. The hydrogen fuel cell detection system according to claim 1, wherein the bipolar plate has a plurality of the corresponding pre-formed holes, the pin structures in the detection device have a plurality of the pin structures located in the pre-formed holes in one-to-one correspondence, each of the pin structures is electrically connected with the temperature measuring instrument and the voltage measuring instrument, respectively, the temperature measuring instrument is used for displaying a plurality of the temperature values, and the voltage measuring instrument is used for displaying a plurality of the voltage values.
6. The hydrogen fuel cell detection system according to any one of claims 1 to 5, wherein the second end of the first heat electrode is a working end of the thermocouple loop, the second end of the second heat electrode is a reference end of the thermocouple loop, and the working end and the reference end are located outside the conductive housing through the through holes in a one-to-one correspondence, and are located on a side of the conductive housing away from the reserved holes.
7. The hydrogen fuel cell detection system according to any one of claims 1 to 5, characterized in that the insulating structure includes:
a first insulating layer covering the inner wall of the through hole;
And a second insulating layer filled in the accommodation space between the thermocouple loop and the conductive housing.
8. The hydrogen fuel cell detection system according to any one of claims 1 to 5, wherein the conductive housing is a cylindrical conductive housing.
9. The hydrogen fuel cell detection system according to claim 8, wherein the outer diameter of the cylindrical conductive housing is 0.2mm to 15mm.
10. The hydrogen fuel cell detection system according to any one of claims 1 to 5, wherein the number of the pin structures is 15 to 40.
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| CN202322452609.XU CN221100812U (en) | 2023-09-08 | 2023-09-08 | Hydrogen fuel cell detection system |
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