CN113745582B - Labyrinth structure of gas-water separator for fuel cell - Google Patents
Labyrinth structure of gas-water separator for fuel cell Download PDFInfo
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- CN113745582B CN113745582B CN202111043792.7A CN202111043792A CN113745582B CN 113745582 B CN113745582 B CN 113745582B CN 202111043792 A CN202111043792 A CN 202111043792A CN 113745582 B CN113745582 B CN 113745582B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- 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
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Abstract
The utility model provides a moisture separator's labyrinth structure for fuel cell, includes the moisture separator casing, and moisture separator casing one side is equipped with back hydrogen entry, and moisture separator casing bottom is equipped with the outlet, and moisture separator casing top is equipped with back hydrogen export, still includes: the water baffle is arranged in the shell of the gas-water separator below the hydrogen return inlet; the primary water distribution plate is obliquely arranged in the gas-water separator shell on the side opposite to the hydrogen return inlet; and the second-stage water distribution plate is obliquely arranged in the gas-water separator shell above the first-stage water distribution plate. Divide water effectually, can effectually separate hydrogen and water, avoid a large amount of water to get into hydrogen circulating pump and pile and produce the water logging, the resistance that receives when the hydrogenous mist that can reduce greatly passes through in addition first opening and second opening's setting has guaranteed the gas pressure of hydrogen return export, has reduced the power consumption of hydrogen circulating pump.
Description
The technical field is as follows:
the invention relates to a labyrinth structure of a gas-water separator for a fuel cell.
Background art:
the development of new energy fuel cell automobiles at present is considered as an important link of traffic energy power transformation, and in order to ensure the normal work of a fuel cell engine, the fuel cell engine generally needs auxiliary systems such as a hydrogen supply subsystem, an air supply subsystem, a circulating water cooling management subsystem and the like. The fuel cell generates electric energy through electrochemical reaction between combustible substances (hydrogen) and oxygen in air, wherein after the reaction of the fuel cell, discharged gas contains a large amount of hydrogen, and if the hydrogen is directly discharged into the atmosphere, on one hand, energy is wasted, on the other hand, the environment is polluted, and on the other hand, the hydrogen is flammable and combustible, so that danger is generated, and therefore, the hydrogen needs to be recycled. At present, these hydrogen-containing mixed gases are generally recycled to the fuel cell by a hydrogen circulation pump for recycling.
However, in the fuel cell stack, water generated by the reaction is carried away by the hydrogen-containing mixed gas during the power generation, so that the content of water vapor in the hydrogen-containing mixed gas is high and the humidity is high. Currently, a gas-water separator is generally adopted, but the existing gas-water separator has poor water separation effect, and can not effectively separate residual hydrogen which does not participate in the reaction from water, so that a large amount of water enters a hydrogen circulating pump and a galvanic pile to generate flooding, the power of the galvanic pile is reduced, and the working stability of a fuel cell system is influenced; some water diversion effect is good, but the internal structure is too complex, and the resistance that the hydrogen-containing mixed gas received when passing through is very big, causes the atmospheric pressure greatly reduced of gas-water separator gas outlet to the power consumption of hydrogen circulating pump has been increased. In addition, in the use process, hydrogen and water need to collide with the partition plate of the gas-water separator for many times, so that the partition plate is easy to corrode, and after the surface corrosion is caused, the discharge of condensed water is not facilitated, the corrosion is further enhanced, and obviously, certain technical disadvantages exist in the partition plate of the existing hydrogen-water separator.
In summary, the problem of the gas-water separator of the fuel cell has become a technical problem to be solved urgently in the industry.
The invention content is as follows:
the invention provides a labyrinth structure of a gas-water separator for a fuel cell, which aims to make up for the defects of the prior art, solves the problem that a large amount of water enters a hydrogen circulating pump and a galvanic pile to cause flooding due to poor water separation effect of the prior gas-water separator, and solves the problem that the air pressure at the air outlet of the gas-water separator is greatly reduced due to excessive internal resistance of the prior gas-water separator.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a moisture separator's labyrinth structure for fuel cell, includes the moisture separator casing, and moisture separator casing one side is equipped with back hydrogen entry, and moisture separator casing bottom is equipped with the outlet, and moisture separator casing top is equipped with back hydrogen export, still includes:
the water baffle is arranged in the gas-water separator shell below the hydrogen return inlet, and is used for preventing water stored in the bottom of the gas-water separator shell from upwards flowing out during oscillation, and a water falling hole is formed in the water baffle;
the primary water distribution plate is obliquely arranged in the gas-water separator shell on the side opposite to the hydrogen return inlet, one side of the primary water distribution plate close to the hydrogen return inlet is arranged at an interval with the gas-water separator shell, one side of the primary water distribution plate far away from the hydrogen return inlet is fixedly connected with the gas-water separator shell and is provided with a first notch, and one side of the primary water distribution plate close to the hydrogen return inlet is higher than one side of the primary water distribution plate far away from the hydrogen return inlet;
the second grade divides the water board, the slope of second grade divides the water board to install in the deareator casing of one-level branch water board top, the second grade divides the water board to keep away from back hydrogen entry one side and deareator casing between the interval setting, the second grade divides the water board to be close to back hydrogen entry one side and links firmly and be equipped with the second opening with the deareator casing, the second grade divides the water board to keep away from back hydrogen entry one side and is higher than the second grade divides the water board to be close to back hydrogen entry one side.
The water baffle comprises an arc-shaped plate with a high middle part and low two ends, and the water falling holes are formed in two sides of the arc-shaped plate.
The inside of the gas-water separator shell is a triangular cavity.
The gas-water separator shell, the water baffle, the primary water diversion plate and the secondary water diversion plate are integrally cast and molded.
The water baffle, the first-level water diversion plate and the second-level water diversion plate are hydrophobic carbon-based silicon dioxide resin coatings with hydrogen water corrosion resistance, and the hydrophobic carbon-based silicon dioxide resin coatings with hydrogen water corrosion resistance are prepared from the following raw materials in parts by mass: dopamine hydrochloride: 10-15 parts; polyacrylic acid: 30-40 parts; nano silicon dioxide: 6-8 parts; carbon nanotube: 4-8 parts; zinc oxide: 1-3 parts.
The particle size of the nano silicon dioxide is 100-1000 nm; the carbon nano tube is a single-wall carbon nano tube; the water contact angle of the coating is not less than 160 deg.
The solvent also comprises the following components in percentage by mass: deionized water: 60-80 parts.
The preparation method of the hydrophobic carbon-based silicon dioxide resin coating resisting the hydrogen water corrosion comprises the following steps:
placing nano silicon dioxide, carbon nano tubes and zinc oxide in deionized water for ball milling to obtain primary ball milling liquid;
under the condition of isolating air, dopamine hydrochloride and polyacrylic acid are placed in primary ball-milling liquid and fully stirred to obtain coating liquid;
and coating the coating liquid on the surfaces of the water baffle, the primary water diversion plate and the secondary water diversion plate to obtain a coating.
The ball milling time is not less than 3h, the rotating speed of the full stirring is 500-1000r/min, and the time is not less than 2 h.
And drying and forming are carried out after the coating liquid is coated, wherein the drying and forming temperature is 120-140 ℃, and the drying and forming time is 5-6 h.
By adopting the scheme, the invention has the following advantages:
by arranging the primary water diversion plate and the secondary water diversion plate in the gas-water separator shell, after hydrogen-containing mixed gas enters the gas-water separator from the hydrogen return inlet, one part of the hydrogen-containing mixed gas is blocked by the primary water diversion plate and then is conveyed backwards from the first opening, the other part of the hydrogen-containing mixed gas is blocked by the primary water diversion plate and returns backwards through the side, close to the hydrogen return inlet, of the primary water diversion plate and is conveyed backwards between the gas-water separator shell and the two parts of the hydrogen-containing mixed gas, the two parts of the hydrogen-containing mixed gas are conveyed backwards through the second opening and is conveyed backwards to the hydrogen return outlet through the side, far away from the hydrogen return inlet, of the secondary water diversion plate and between the gas-water separator shell, a part of the hydrogen-containing mixed gas enters from the hydrogen return inlet and then is directly conveyed backwards through the second opening to the hydrogen return outlet, water vapor in the hydrogen-containing mixed gas is condensed into liquid drops on the lower surfaces of the primary water diversion plate and the secondary water diversion plate and falls downwards under the action of gravity, the water vapor in the hydrogen-containing mixed gas is condensed into liquid drops on the upper surfaces of the primary water diversion plate and the second opening and the first opening and the second opening and falls downwards, finally, the water flows into the bottom of the shell of the gas-water separator through a water falling hole on the water baffle and is discharged from a water outlet. The setting of one-level water diversion plate and second grade water diversion plate, not only divide water effectually, can effectually separate hydrogen and water, avoid a large amount of water to get into hydrogen circulating pump and pile and produce the water logging, the resistance that receives when first opening and second opening set up in addition, can reduce the hydrogenous mist greatly and pass through has guaranteed the gas pressure of hydrogen return export, has reduced hydrogen circulating pump's power consumption.
The water baffle, the primary water diversion plate and the secondary water diversion plate are provided with hydrophobic carbon-based silicon dioxide resin coatings with hydrogen water corrosion resistance, dopamine hydrochloride and polyacrylic acid are used as base materials of the resin, and then nano silicon dioxide and carbon nano tubes are used as assistance, so that a hydrophobic surface is formed on the surface of the coating; the water-based coating is adopted, so that the dopamine hydrochloride and the polyacrylic acid can be dissolved, and the nano silicon dioxide, the carbon nano tube and the zinc oxide can be dissolved in the coating; the primary ball milling liquid is obtained by ball milling the nano silicon dioxide, the carbon nano tubes and the zinc oxide, so that the nano silicon dioxide, the carbon nano tubes and the zinc oxide can have a certain mutual ball milling effect, the dispersity of the nano silicon dioxide, the carbon nano tubes and the zinc oxide is improved, then the dopamine hydrochloride and the polyacrylic acid are arranged to obtain a colloid material, and spraying and coating are conveniently carried out at the later stage to obtain a coating.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a gas-water separator shell, 2, a hydrogen return inlet, 3, a water outlet, 4, a hydrogen return outlet, 5, a water baffle, 6, a water falling hole, 7, a primary water diversion plate, 8, a first opening, 9, a secondary water diversion plate, 10 and a second opening.
The specific implementation mode is as follows:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, a labyrinth structure of gas-water separator for fuel cell, including gas- water separator casing 1, 1 one side of gas-water separator casing is equipped with back hydrogen entry 2, and 1 bottom of gas-water separator casing is equipped with outlet 3, and 1 top of gas-water separator casing is equipped with back hydrogen export 4, still includes:
the water baffle 5 is arranged in the gas-water separator shell below the hydrogen return inlet, the water baffle is used for preventing water stored in the bottom of the gas-water separator shell from rippling upwards during oscillation, and a water falling hole 6 is formed in the water baffle;
the primary water distribution plate 7 is obliquely arranged in the gas-water separator shell on the side opposite to the hydrogen return inlet, one side, close to the hydrogen return inlet, of the primary water distribution plate is arranged at intervals with the gas-water separator shell, one side, far away from the hydrogen return inlet, of the primary water distribution plate is fixedly connected with the gas-water separator shell and is provided with a first notch 8, and one side, close to the hydrogen return inlet, of the primary water distribution plate is higher than one side, far away from the hydrogen return inlet, of the primary water distribution plate;
second grade water diversion plate 9, second grade water diversion plate 9 slope is installed in the deareator casing of one-level water diversion plate top, the second grade water diversion plate is kept away from hydrogen return entry one side and is set up with the deareator casing between the interval, second grade water diversion plate is close to hydrogen return entry one side and links firmly and be equipped with second opening 10 with the deareator casing, second grade water diversion plate keeps away from hydrogen return entry one side and is higher than second grade water diversion plate and is close to hydrogen return entry one side.
The water baffle 5 comprises an arc-shaped plate with a high middle part and low two ends, and the water falling holes 6 are formed in the two sides of the arc-shaped plate, so that water on the water baffle can conveniently enter the bottom of the gas-water separator shell from the water falling holes in the two sides.
The inside of the gas-water separator shell is a triangular cavity.
The gas-water separator shell, the water baffle, the primary water diversion plate and the secondary water diversion plate are integrally cast and molded.
The working principle is as follows:
after the hydrogen-containing mixed gas enters the gas-water separator from the hydrogen return inlet 2, one part of the hydrogen-containing mixed gas is blocked by the primary water dividing plate 7 and then is conveyed backwards from the first notch 8, the other part of the hydrogen-containing mixed gas is blocked by the primary water dividing plate 7 and returns to the space between one side of the primary water dividing plate 7 close to the hydrogen return inlet 2 and the gas-water separator shell 1, the two parts of the hydrogen-containing mixed gas are conveyed backwards between one side of the secondary water dividing plate 9 far away from the hydrogen return inlet and the gas-water separator shell to the hydrogen return outlet 4, a small amount of hydrogen-containing mixed gas enters from the hydrogen return inlet 2 and then is directly conveyed backwards to the hydrogen return outlet 4 through the second notch 10, water vapor in the hydrogen-containing mixed gas is condensed into liquid drops on the lower surfaces of the primary water dividing plate 7 and the secondary water dividing plate 9 and drops fall downwards under the action of gravity, the water vapor in the hydrogen-containing mixed gas is condensed into liquid drops on the upper surfaces of the primary water dividing plate 7 and the secondary water dividing plate 9 and flows to the first notch 8 and the second notch 10 and drops downwards, finally, the water flows into the bottom of the shell of the gas-water separator through a water falling hole 6 on a water baffle 5 and is finally discharged from a water outlet 3. The setting of one-level water diversion plate and second grade water diversion plate, not only divide water effectually, can effectually separate hydrogen and water, avoid a large amount of water to get into hydrogen circulating pump and pile and produce the water logging, the resistance that receives when first opening and second opening set up in addition, can reduce the hydrogenous mist greatly and pass through has guaranteed the gas pressure of hydrogen return export, has reduced hydrogen circulating pump's power consumption.
The water baffle, the first-level water diversion plate and the second-level water diversion plate are hydrophobic carbon-based silicon dioxide resin coatings with hydrogen water corrosion resistance, and the hydrophobic carbon-based silicon dioxide resin coatings with hydrogen water corrosion resistance are prepared from the following raw materials in parts by mass: dopamine hydrochloride: 10-15 parts; polyacrylic acid: 30-40 parts; nano silicon dioxide: 6-8 parts; carbon nanotube: 4-8 parts; zinc oxide: 1-3 parts. This application adopts hydrochloric acid dopamine and polyacrylic acid as the base material of resin, then supplementary with nanometer silica, carbon nanotube for the coating surface forms hydrophobic surface, and after hydrogen water separation, water can break away from the coating surface fast, when improving separation efficiency, can also avoid corroding.
The particle size of the nano silicon dioxide is 100-1000 nm; the carbon nano tube is a single-wall carbon nano tube; the water contact angle of the coating is not less than 160 deg.
The solvent also comprises the following components in percentage by mass: deionized water: 60-80 parts. The water-based coating is adopted, so that the dopamine hydrochloride and the polyacrylic acid can be dissolved, and the nano silicon dioxide, the carbon nano tube and the zinc oxide can be dissolved in the coating.
The preparation method of the hydrophobic carbon-based silicon dioxide resin coating resisting the hydrogen water corrosion comprises the following steps:
placing nano silicon dioxide, carbon nano tubes and zinc oxide in deionized water for ball milling to obtain primary ball milling liquid;
under the condition of isolating air, dopamine hydrochloride and polyacrylic acid are placed in primary ball-milling liquid and fully stirred to obtain coating liquid;
and coating the coating liquid on the surfaces of the water baffle, the primary water diversion plate and the secondary water diversion plate to obtain a coating. According to the method, the nano silicon dioxide, the carbon nano tubes and the zinc oxide are firstly subjected to ball milling to obtain the primary ball milling liquid, so that the nano silicon dioxide, the carbon nano tubes and the zinc oxide can have a certain mutual ball milling effect, the dispersity of the nano silicon dioxide, the carbon nano tubes and the zinc oxide is improved, then the dopamine hydrochloride and the polyacrylic acid are arranged to obtain the colloid material, and the coating is obtained by spraying and coating at the later stage of convenience.
The ball milling time is not less than 3h, the rotating speed of the full stirring is 500-1000r/min, and the time is not less than 2 h.
And drying and forming are carried out after the coating liquid is coated, wherein the drying and forming temperature is 120-140 ℃, and the drying and forming time is 5-6 h.
The present application illustrates a specific embodiment of the present application by way of examples of synthesis and characterization, the specific synthesis steps being as follows:
a preparation method of a hydrophobic carbon-based silicon dioxide resin coating resisting hydrogen and water corrosion comprises the following steps:
s1, placing nano silicon dioxide, carbon nano tubes and zinc oxide in deionized water for ball milling to obtain primary ball milling liquid; the ball milling time is not less than 3 h; the particle size of the nano silicon dioxide is 100-1000 nm; the carbon nano tube is a single-wall carbon nano tube;
s2, under the condition of isolating air, placing dopamine hydrochloride and polyacrylic acid into primary ball-milling liquid, and fully stirring to obtain coating liquid; the rotating speed of the full stirring is 500-1000r/min, and the time is not less than 2 h;
for the material content, as shown in table 1;
table 1:
for the operating parameters as shown in table 2.
Table 2:
s3, coating and drying the coating liquid on the surfaces of the water baffle, the primary water distribution plate and the secondary water distribution plate to obtain a coating; the drying and forming temperature is 120-140 ℃, and the time is 5-6 h;
s4, measuring the water contact angle, as shown in the table 3.
Table 3:
| serial number | Water contact Angle (°) |
| 1 | 165 |
| 2 | 162 |
| 3 | 161 |
| 4 | 137 |
| 5 | 132 |
| 6 | 129 |
| 7 | 151 |
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (8)
1. The utility model provides a labyrinth structure of gas-water separator for fuel cell, includes the gas-water separator casing, and gas-water separator casing one side is equipped with back hydrogen entry, and gas-water separator casing bottom is equipped with the outlet, and gas-water separator casing top is equipped with back hydrogen export, its characterized in that: further comprising:
the water baffle is arranged in the gas-water separator shell below the hydrogen return inlet, and is used for preventing water stored in the bottom of the gas-water separator shell from upwards flowing out during oscillation, and a water falling hole is formed in the water baffle;
the primary water distribution plate is obliquely arranged in the gas-water separator shell on the side opposite to the hydrogen return inlet, one side of the primary water distribution plate close to the hydrogen return inlet is arranged at an interval with the gas-water separator shell, one side of the primary water distribution plate far away from the hydrogen return inlet is fixedly connected with the gas-water separator shell and is provided with a first notch, and one side of the primary water distribution plate close to the hydrogen return inlet is higher than one side of the primary water distribution plate far away from the hydrogen return inlet;
the second-stage water distribution plate is obliquely arranged in the gas-water separator shell above the first-stage water distribution plate, one side, away from the hydrogen return inlet, of the second-stage water distribution plate is arranged at an interval with the gas-water separator shell, one side, close to the hydrogen return inlet, of the second-stage water distribution plate is fixedly connected with the gas-water separator shell and is provided with a second notch, and one side, away from the hydrogen return inlet, of the second-stage water distribution plate is higher than one side, close to the hydrogen return inlet, of the second-stage water distribution plate;
the water baffle, the first order water diversion plate, the second grade water diversion plate are equipped with hydrogen water corrosion resistant's hydrophobic type carbon base silica resin coating, hydrogen water corrosion resistant's hydrophobic type carbon base silica resin coating includes that the raw materials of following parts by mass prepare and form: dopamine hydrochloride: 10-15 parts; polyacrylic acid: 30-40 parts; nano silicon dioxide: 6-8 parts; carbon nanotube: 4-8 parts; zinc oxide: 1-3 parts;
the preparation method of the hydrophobic carbon-based silicon dioxide resin coating resisting hydrogen water corrosion comprises the following steps:
placing nano silicon dioxide, carbon nano tubes and zinc oxide in deionized water for ball milling to obtain primary ball milling liquid;
under the condition of isolating air, dopamine hydrochloride and polyacrylic acid are placed in primary ball-milling liquid and fully stirred to obtain coating liquid;
and coating the coating liquid on the surfaces of the water baffle, the primary water diversion plate and the secondary water diversion plate to obtain a coating.
2. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the water baffle comprises an arc-shaped plate with a high middle part and low two ends, and the water falling holes are formed in two sides of the arc-shaped plate.
3. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the inside of the gas-water separator shell is a triangular cavity.
4. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the gas-water separator shell, the water baffle, the primary water diversion plate and the secondary water diversion plate are integrally cast and molded.
5. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the particle size of the nano silicon dioxide is 100-1000 nm; the carbon nano tube is a single-wall carbon nano tube; the water contact angle of the coating is not less than 160 deg.
6. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the solvent also comprises the following components in percentage by mass: deionized water: 60-80 parts.
7. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: the ball milling time is not less than 3h, the rotating speed of the full stirring is 500-1000r/min, and the time is not less than 2 h.
8. The labyrinth structure of a gas-water separator for a fuel cell as set forth in claim 1, wherein: and drying and forming are carried out after the coating liquid is coated, wherein the drying and forming temperature is 120-140 ℃, and the drying and forming time is 5-6 h.
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| CN104383779A (en) * | 2014-12-02 | 2015-03-04 | 常州市文每机械配件厂 | Novel gas-water separator |
| CN105295655A (en) * | 2015-11-25 | 2016-02-03 | 中国科学院兰州化学物理研究所 | Super-hydrophobic repairable aqueous coating material and preparation method thereof |
| CN111048805B (en) * | 2019-12-05 | 2023-02-28 | 同济大学 | Hydrogen water separation device assembly of fuel cell engine |
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