CN210668554U - Fuel cell for measuring internal temperature and humidity in real time - Google Patents
Fuel cell for measuring internal temperature and humidity in real time Download PDFInfo
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- CN210668554U CN210668554U CN201922269566.5U CN201922269566U CN210668554U CN 210668554 U CN210668554 U CN 210668554U CN 201922269566 U CN201922269566 U CN 201922269566U CN 210668554 U CN210668554 U CN 210668554U
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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 utility model provides a fuel cell for measuring the internal temperature and humidity in real time, which comprises a plurality of proton exchange membranes, a plurality of diffusion layers, a plurality of bipolar plates, a plurality of current collecting plates and a plurality of insulating plates; at least one proton exchange membrane, a diffusion layer, a bipolar plate, a collector plate or an insulating plate is used as a measurement substrate, at least one surface of at least one measurement substrate is coated with a temperature-sensitive material layer, at least one surface of at least one measurement substrate is coated with a humidity-sensitive material layer, and the temperature-sensitive material layer and the humidity-sensitive material layer are respectively provided with a lead or a pin which is used for being connected with an external measurement circuit. The fuel cell is capable of measuring internal temperature and humidity in real time.
Description
Technical Field
The utility model relates to a fuel cell technical field, in particular to fuel cell of inside temperature humidity of real-time measurement.
Background
In recent years, with the acceleration of the adjustment process of the global energy supply structure and the sign of paris agreement, the requirements of environmental friendliness and carbon emission reduction of an energy system are increasingly improved, and the development of clean and renewable energy becomes a trend. Hydrogen energy is a recognized clean energy source, is known as a secondary energy source with the greatest development prospect in the 21 st century, is rapidly developed, and a long-term innovation and development plan of hydrogen energy is made in industrially developed countries represented by japan, the usa and germany. Currently, fuel cell vehicles have entered the pre-commercialization period, and proton exchange membrane fuel cells, which are one of the low-temperature fuel cells, are clean and have high energy conversion efficiency, and thus are considered to be the best choice for future vehicle power.
The factors influencing the performance of the proton exchange membrane fuel cell are numerous and mutually coupled, but the temperature and the humidity are the two largest influencing factors, and are inevitable problems in researching the water heat management of the fuel cell. The main reason for the influence on the temperature is that the catalyst in the proton exchange membrane fuel cell needs a certain temperature to meet the reaction requirement, but the performance is reduced due to the overdrying of the membrane electrode caused by the overhigh temperature. The main effect on humidity is that proton conduction in the proton exchange membrane fuel cell is in the form of hydrated protons, so a certain humidity is required to meet the proton conduction required for power generation, but too high humidity causes flooding to cause gas transmission obstruction and performance degradation. And the two factors of temperature and humidity are coupled with each other, so that the monitoring of the temperature and the humidity must be carried out during the power generation process of the fuel cell so as to meet the power generation output of the fuel cell with high performance and long service life.
At present, a fuel cell system mainly adopts a temperature sensor, a humidity sensor or a temperature and humidity integrated sensor for measurement, but the sensor can only monitor the temperature and the humidity at an inlet or an outlet of a cell and cannot accurately reflect the internal temperature and the humidity of the fuel cell.
It is seen that the prior art is susceptible to improvements and enhancements.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a fuel cell capable of measuring the internal temperature and humidity in real time.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a fuel cell for measuring internal temperature and humidity in real time comprises a plurality of proton exchange membranes, a plurality of diffusion layers, a plurality of bipolar plates, a plurality of collector plates and a plurality of insulation plates; at least one proton exchange membrane, a diffusion layer, a bipolar plate, a collector plate or an insulating plate is used as a measurement substrate, at least one surface of at least one measurement substrate is coated with a temperature-sensitive material layer, at least one surface of at least one measurement substrate is coated with a humidity-sensitive material layer, and the temperature-sensitive material layer and the humidity-sensitive material layer are respectively provided with a lead or a pin which is used for being connected with an external measurement circuit.
The fuel cell of the inside temperature humidity of real-time measurement in, be provided with temperature sensitive material layer and humidity sensitive material layer on the same measurement substrate simultaneously, just only one side of measurement substrate is provided with temperature sensitive material layer or humidity sensitive material layer.
The fuel cell of the inside temperature humidity of real-time measurement in, be provided with temperature sensitive material layer and humidity sensitive material layer on the same measurement substrate simultaneously, just the two sides of measuring the substrate all are provided with temperature sensitive material layer or humidity sensitive material layer.
In the fuel cell for measuring the internal temperature and humidity in real time, the temperature-sensitive material layer and the humidity-sensitive material layer are simultaneously arranged on the same measuring base material, and the temperature-sensitive material layer and the humidity-sensitive material layer are arranged on different surfaces of the measuring base material.
In the fuel cell for measuring the internal temperature and humidity in real time, a temperature-sensitive material layer and a humidity-sensitive material layer are simultaneously arranged on the same measuring base material, the temperature-sensitive material layer and the humidity-sensitive material layer are arranged on the same surface of the measuring base material, and the humidity-sensitive material layer is coated on the temperature-sensitive material layer.
In the fuel cell for measuring the internal temperature and humidity in real time, the two surfaces of the measuring base material are provided with a temperature-sensitive material layer and a humidity-sensitive material layer.
In the fuel cell for measuring the internal temperature and humidity in real time, at least one measuring base material is simultaneously provided with a temperature-sensitive material layer and a humidity-sensitive material layer, and the other at least one measuring base material is only provided with the temperature-sensitive material layer or the humidity-sensitive material layer.
In the fuel cell for measuring the internal temperature and humidity in real time, the temperature-sensitive material layer is an SiC layer.
In the fuel cell for measuring the internal temperature and humidity in real time, the thickness of the SiC layer is 90 nm-110 nm.
In the fuel cell for measuring the internal temperature and humidity in real time, the humidity sensitive material layer is a composite layer formed by compounding carbon nano tubes and paper fibers.
Has the advantages that:
the utility model provides a pair of fuel cell of real-time measurement inside temperature humidity, through proton exchange membrane inside fuel cell, the diffusion layer, bipolar plate, set up temperature sensitive material layer and humidity sensitive material layer on current collection board or the insulation board, and be connected with outside measuring circuit through lead wire or pin, the resistance on temperature sensitive material layer can change according to the change of temperature, the resistance on humidity sensitive material layer can change according to the change of humidity, its change condition accessible outside measuring circuit surveys, thereby obtain corresponding temperature value and humidity value. Therefore, the fuel cell can measure the internal temperature and humidity in real time.
Drawings
Fig. 1 is the utility model provides an among the fuel cell of real-time measurement inside temperature humidity, the schematic diagram of first temperature sensitive material layer and the humidity sensitive material layer mode of setting.
Fig. 2 is the schematic diagram of the setting mode of the second temperature-sensitive material layer and the humidity-sensitive material layer in the fuel cell for measuring the internal temperature and humidity in real time provided by the utility model.
Fig. 3 is the schematic diagram of the setting mode of the third temperature-sensitive material layer and the humidity-sensitive material layer in the fuel cell for measuring the internal temperature and humidity in real time provided by the utility model.
Fig. 4 is a schematic diagram of a setting mode of a fourth temperature-sensitive material layer and a humidity-sensitive material layer in the fuel cell for measuring the internal temperature and humidity in real time provided by the utility model.
Fig. 5 is a schematic diagram of the setting mode of the fifth temperature-sensitive material layer and the humidity-sensitive material layer in the fuel cell for measuring the internal temperature and humidity in real time provided by the present invention.
Fig. 6 is a schematic structural diagram of a fuel cell for measuring internal temperature and humidity in real time according to a first embodiment.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The following disclosure provides embodiments or examples for implementing different configurations of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1-5, a fuel cell for measuring internal temperature and humidity in real time according to the present invention includes a plurality of proton exchange membranes, a plurality of diffusion layers, a plurality of bipolar plates, a plurality of current collecting plates, and a plurality of insulating plates; at least one proton exchange membrane, a diffusion layer, a bipolar plate, a collector plate or an insulation plate is used as a measurement substrate 1, at least one surface of at least one measurement substrate 1 is coated with a temperature-sensitive material layer 2, at least one surface of at least one measurement substrate 1 is coated with a humidity-sensitive material layer 3, and the temperature-sensitive material layer and the humidity-sensitive material layer are respectively provided with a lead or a pin (not shown in the figure) used for being connected with an external measurement circuit.
The resistance of the temperature-sensitive material layer 2 can change with the change of temperature, and can be but not limited to a semiconductor heat-sensitive material (such as a single crystal semiconductor, a polycrystalline semiconductor, a glass semiconductor, an organic semiconductor, a metal oxide, and the like), a metal heat-sensitive material (such as platinum, nickel, copper, and the like), an alloy heat-sensitive material, and the coating mode can be but not limited to magnetron sputtering, ion beam assisted deposition, chemical vapor deposition, and the like; the resistance of the humidity sensitive material layer 3 can change with the change of humidity, and can be, but not limited to, semiconductor ceramic, lithium chloride, organic polymer film (such as polystyrene, polyimide, acetate butyrate, etc.), carbon nanotube, etc. The external measuring circuit is prior art and can be referred to the measuring circuits of the existing thermal resistance temperature sensor and humidity sensitive temperature sensor, such as a bridge circuit.
The temperature-sensitive material layer 2 and the humidity-sensitive material layer 3 are arranged on a proton exchange membrane, a diffusion layer, a bipolar plate, a collector plate or an insulation plate inside the fuel cell and are connected with an external measuring circuit through a lead or a pin, the resistance of the temperature-sensitive material layer 2 can change according to the change of temperature, the resistance of the humidity-sensitive material layer 3 can change according to the change of humidity, and the change condition can be measured through the external measuring circuit, so that a corresponding temperature value and a humidity value are obtained. Therefore, the fuel cell can measure the internal temperature and humidity in real time.
The temperature-sensitive material layer 2 and the humidity-sensitive material layer 3 can be arranged on the same measuring substrate 1; can also be provided on different measurement substrates 1; or both of the above cases are included (i.e. at least one measurement substrate 1 is provided with the temperature-sensitive material layer 2 and the humidity-sensitive material layer 3, and at least one other measurement substrate 1 is provided with only the temperature-sensitive material layer or the humidity-sensitive material layer).
When the temperature-sensitive material layer 2 and the humidity-sensitive material layer 3 are provided on different measurement substrates 1, the following cases are included:
firstly, a temperature-sensitive material layer 2 and a humidity-sensitive material layer 3 are not arranged on the same measuring substrate 1 at the same time, and only one surface of the measuring substrate 1 is provided with the temperature-sensitive material layer or the humidity-sensitive material layer, as shown in fig. 1;
secondly, the same measuring substrate 1 is not provided with the temperature sensitive material layer 2 and the humidity sensitive material layer 3 at the same time, and the two sides of the measuring substrate 1 are both provided with the temperature sensitive material layer or the humidity sensitive material layer, as shown in fig. 2.
When the temperature-sensitive material layer 2 and the humidity-sensitive material layer 3 are provided on the same measurement substrate 1, the following cases are included:
thirdly, a temperature-sensitive material layer 2 and a humidity-sensitive material layer 3 are simultaneously arranged on the same measuring substrate 1, and the temperature-sensitive material layer and the humidity-sensitive material layer are arranged on different surfaces of the measuring substrate, as shown in fig. 3;
fourthly, a temperature-sensitive material layer 2 and a humidity-sensitive material layer 3 are arranged on the same measuring substrate 1 at the same time, the temperature-sensitive material layer and the humidity-sensitive material layer are arranged on the same surface of the measuring substrate, and the humidity-sensitive material layer 3 is coated on the temperature-sensitive material layer 2 (so as to ensure that the humidity-sensitive material layer 3 can be contacted with water); this situation can be divided into two categories again: the first type is that only one side of the measuring substrate 1 is provided with a temperature-sensitive material layer 2 and a humidity-sensitive material layer 3 (as shown in figure 4), and the second type is that the two sides of the measuring substrate 1 are both provided with the temperature-sensitive material layer 2 and the humidity-sensitive material layer 3 (as shown in figure 5).
The second type of the fourth condition is an optimal structure, the measured temperature value and the measured humidity value are values at the same position, the coupling condition of the temperature and the humidity can be displayed highly reliably, the two surfaces of the measuring substrate 1 are measured, and the temperature and the humidity can be adjusted by comprehensively considering the temperature and the humidity values of the two surfaces.
The following is further illustrated by the specific examples:
example one
Referring to fig. 6, a fuel cell for real-time measurement of internal temperature and humidity, wherein a bipolar plate made of SiO2 is used as a measurement substrate 1, and a SiC thin film layer with a thickness of 90nm to 110nm (preferably 100 nm) is prepared on the two side surfaces by a magnetron sputtering method; and then preparing a composite film layer compounded by carbon nano tubes and paper fibers on the surface of the SiC film layer (wherein the paper fibers are mainly used for absorbing water).
The fuel cell has 200 bipolar plates, and the bipolar plate provided with the SiC thin film layer and the composite thin film layer is the 100 th bipolar plate (closest to the middle position of the fuel cell).
The fuel cell was a 70kW fuel cell, which was assembled into a fuel cell system, with a cell operating temperature of 72 deg.C, an air pressure of 100kPa, a hydrogen pressure of 110kPa, and an air side inlet humidity of 60%.
The temperature and humidity change conditions of the innermost position in the fuel cell are monitored in real time in the operation process, if the highest temperature is detected to exceed 90 ℃, the temperature of the cell is reduced by accelerating the rotating speed of a water pump, and if the highest humidity is detected to exceed 90%, the air inflow is improved, the redundant liquid water is discharged as soon as possible, and the flooding condition is avoided.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and the embodiments are substantially the same as the present invention.
Claims (10)
1. A fuel cell for measuring internal temperature and humidity in real time comprises a plurality of proton exchange membranes, a plurality of diffusion layers, a plurality of bipolar plates, a plurality of collector plates and a plurality of insulation plates; the device is characterized in that at least one proton exchange membrane, a diffusion layer, a bipolar plate, a collector plate or an insulation plate is used as a measurement substrate, at least one surface of at least one measurement substrate is coated with a temperature-sensitive material layer, at least one surface of at least one measurement substrate is coated with a humidity-sensitive material layer, and the temperature-sensitive material layer and the humidity-sensitive material layer are respectively provided with a lead or a pin used for being connected with an external measurement circuit.
2. The fuel cell for measuring the internal temperature and humidity in real time according to claim 1, wherein the temperature-sensitive material layer and the humidity-sensitive material layer are not simultaneously disposed on the same measurement substrate, and only one surface of the measurement substrate is provided with the temperature-sensitive material layer or the humidity-sensitive material layer.
3. The fuel cell for measuring the internal temperature and humidity in real time according to claim 1, wherein the temperature-sensitive material layer and the humidity-sensitive material layer are not simultaneously disposed on the same measurement substrate, and both surfaces of the measurement substrate are disposed with the temperature-sensitive material layer or the humidity-sensitive material layer.
4. The fuel cell for measuring internal temperature and humidity in real time according to claim 1, wherein a temperature-sensitive material layer and a humidity-sensitive material layer are simultaneously disposed on the same measurement substrate, and the temperature-sensitive material layer and the humidity-sensitive material layer are disposed on different surfaces of the measurement substrate.
5. The fuel cell for measuring internal temperature and humidity in real time according to claim 1, wherein a temperature-sensitive material layer and a humidity-sensitive material layer are simultaneously disposed on the same measurement substrate, and the temperature-sensitive material layer and the humidity-sensitive material layer are disposed on the same surface of the measurement substrate, and the humidity-sensitive material layer is coated on the temperature-sensitive material layer.
6. The fuel cell for measuring internal temperature and humidity in real time according to claim 5, wherein both sides of the measurement substrate are provided with a temperature-sensitive material layer and a humidity-sensitive material layer.
7. The fuel cell for measuring internal temperature and humidity in real time according to claim 1, wherein at least one of the measurement substrates is provided with a temperature sensitive material layer and a humidity sensitive material layer at the same time, and the other at least one of the measurement substrates is provided with only a temperature sensitive material layer or a humidity sensitive material layer.
8. The fuel cell for measuring internal temperature and humidity in real time according to any one of claims 1 to 7, wherein the temperature-sensitive material layer is a SiC layer.
9. The fuel cell for measuring the internal temperature and humidity in real time according to claim 8, wherein the thickness of the SiC layer is 90nm to 110 nm.
10. The fuel cell for measuring internal temperature and humidity in real time according to any one of claims 1 to 7, wherein the humidity sensitive material layer is a composite layer formed by combining carbon nanotubes and paper fibers.
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| CN201922269566.5U CN210668554U (en) | 2019-12-17 | 2019-12-17 | Fuel cell for measuring internal temperature and humidity in real time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097590A (en) * | 2021-04-01 | 2021-07-09 | 电子科技大学 | Lithium battery current collector with temperature sensing function and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097590A (en) * | 2021-04-01 | 2021-07-09 | 电子科技大学 | Lithium battery current collector with temperature sensing function and preparation method thereof |
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