CN112820901A - Method for solving water flooding problem of hydrogen-oxygen fuel cell in closed environment - Google Patents
Method for solving water flooding problem of hydrogen-oxygen fuel cell in closed environment Download PDFInfo
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- CN112820901A CN112820901A CN202011615575.6A CN202011615575A CN112820901A CN 112820901 A CN112820901 A CN 112820901A CN 202011615575 A CN202011615575 A CN 202011615575A CN 112820901 A CN112820901 A CN 112820901A
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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
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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
- H01M8/04104—Regulation of differential pressures
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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
- H01M8/04179—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 purging or increasing flow or pressure of reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention belongs to the field of fuel cells, and particularly discloses a method for solving the problem of flooding of a hydrogen-oxygen fuel cell in a closed environment. The method specifically comprises the following steps: calculating the monomer voltage deviation proportion and the average voltage deviation proportion in the fuel cell, judging whether all the monomer voltage deviation proportion and the average voltage deviation proportion are smaller than the pulse voltage drop reduction proportion, if so, judging that the state is normal, and if not, entering the next step; replacing a gas supply cylinder with a buffer tank to supply gas to the fuel cell stack, and starting a protection mechanism if the voltage of a monomer or the average voltage is lower than the protection voltage; when any one of the hydrogen buffer pressure and the oxygen buffer pressure is smaller than the buffer pressure, the gas supply cylinder is reused to supply gas for the fuel cell, and water in the fuel cell stack is taken out through pressure difference; the above operations are repeated until the fuel cell is stopped. The invention can early warn the flooding trend of the galvanic pile, reserve regulation and control time for avoiding faults, and carry out water by using the driving force generated by pressure difference, thereby solving the flooding problem of the closed fuel cell and improving the fuel utilization rate.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a method for solving the problem of flooding of a hydrogen-oxygen fuel cell in a closed environment.
Background
Proton Exchange Membrane Fuel Cells (PEMFCs) are widely used as power devices for fuel cell vehicles, buses, submarines, unmanned underwater vehicles, and the like, due to their characteristics of high efficiency, high specific power and energy, zero emission, and short operation and starting time at normal temperature. In underwater environments, long closed runs of fuel cells are required. However, during the long-term closing of the stack, liquid water is continuously generated and accumulated in the cell, resulting in flooding of the cell, which directly results in the degradation of the performance and life of the cell, and therefore, good management of water transport is essential to maintain efficient and stable operation of the PEMFC.
The transport of water within the membrane includes processes of electrical drag, reverse osmosis, diffusion, etc., which are considered to be the main mechanisms of water transport within the membrane. Among them, gas humidity, pressure, temperature are the main external factors affecting water transport in the membrane. The percentage of consumption of hydrogen to electrical and thermal energy is called fuel utilization, which is a measure of the degree of hydrogen utilization supplied. A fuel utilization of 100% means that the amount of hydrogen theoretically supplied to the anode is the same as the amount of electrochemical reaction required. However, due to flooding and nitrogen accumulation, there is a fuel starvation at the outlet of the stack due to fuel starvation caused by cell voltage instability and cell degradation, affecting mass transport and accelerating carbon corrosion.
The existing method for solving the problem of flooding is to introduce excessive reaction gas or stop the battery and introduce inert gas for purging to remove water accumulated in the galvanic pile. However, this method causes a problem of waste of reaction gas or delay in operation suspension of the fuel cell.
Disclosure of Invention
In view of the above-mentioned drawbacks and/or needs of the prior art, the present invention provides a method for solving the problem of flooding of hydrogen-oxygen fuel cells in a closed environment, wherein the voltage drop is used as a pre-determination criterion for early flooding faults, so as to accurately warn the flooding trend of a cell stack; meanwhile, the driving force generated by pulse measures is adopted to take out water, so that the problem of flooding of the closed fuel cell is solved, and the fuel utilization rate is improved.
In order to achieve the above object, the present invention provides a method for solving the problem of flooding of hydrogen-oxygen fuel cells in a closed environment, comprising the following steps:
s1 setting protection voltage VpBuffer pressure P1And the pulse voltage drop is reduced by alpha percent, and the initial voltage V of the hydrogen-oxygen fuel cell during stable operation is recorded0Initial cell voltage delta0i(i-1, 2,3 … … n) and initial average voltage
n is the number of monocells;
s2 detecting the single voltage V of the hydrogen-oxygen fuel celliAnd calculating an average voltage based thereon
Then, the monomer voltage deviation ratios beta are calculated respectively by using the following formulaiProportional to average voltage deviation
Judging the deviation ratio beta of the cell voltageiProportional to average voltage deviation
If all the hydrogen-oxygen fuel cells are smaller than the pulse voltage drop reduction proportion alpha%, judging that the hydrogen-oxygen fuel cells are normal in state without subsequent steps, otherwise, judging that the hydrogen-oxygen fuel cells have a water flooding risk and entering step S3;
s3 the buffer tank is used to replace the gas cylinder to supply gas to the fuel cell stack if the voltage of the single body is ViOr average voltage
Below the protective voltage VpIf so, starting a protection mechanism, automatically cutting off the load and switching to nitrogen purging; if the voltage of the cell ViAnd average voltage
Are all higher than or equal to the protective voltage VpThen the hydrogen is buffered to the pressure PHPAnd oxygen buffer pressure POPAnd a buffer pressure P1Comparing when any one of the pressure values is less than the buffer pressure P1When the fuel cell is used, the gas supply cylinder is reused for supplying gas to the fuel cell, and water in the fuel cell stack is taken out through pressure difference;
s4 repeats steps S2, S3 until the fuel cell stops, so as to solve the problem of flooding of the hydrogen-oxygen cell in the closed environment by means of pulse.
As a further preference, the protective voltage Vp0.25-0.35V.
As a further preference, the protective voltage VpIt was 0.3V.
As a further preference, the buffer pressure P1Is 0.2atm or more.
Further preferably, the pulse voltage drop reduction ratio is 2% to 15%.
It is further preferable that the pressure difference generated in step S3 is 0.5atm to 1.0 atm.
Preferably, the electromagnetic valve for controlling the gas supply of the gas cylinder in the hydrogen-oxygen fuel cell is a normally open electromagnetic valve, and the electromagnetic valve for controlling the gas supply of the buffer tank is a normally closed electromagnetic valve.
As a further preference, the fuel cell stack is vertically placed to assist in draining.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the method has the advantages that the single voltage of each fuel cell is independently acquired, the voltage drop is used as the standard for pre-judging the early-stage flooding fault, the flooding trend of the galvanic pile can be accurately pre-warned, and the regulation and control time is reserved for avoiding the fault; when the risk of flooding exists, the buffer tank is switched to supply air for a period of time, and then the air supply cylinder is switched to supply air, so that a large pressure difference is generated in the fuel cell stack, and water is taken out by using the driving force generated by the pressure difference, so that the problem of flooding of the closed-end fuel cell is solved, the fuel utilization rate is improved, the flooding fault is effectively avoided, and the excess gas can be utilized, and the method provided by the invention can realize the high-efficiency utilization of the fuel utilization rate of more than 99.97%;
2. particularly, the invention optimizes the values of the set protection voltage, the buffer pressure and the pulse voltage drop reduction ratio, can realize the effective removal of liquid water on the proton exchange membrane and the small-range recovery of the performance of the fuel cell stack under the condition of having the smallest influence on the output stack of the fuel cell stack, and ensures the stable and efficient operation of the fuel cell system.
Drawings
FIG. 1 is a schematic diagram of a control method for addressing hydrogen-oxygen fuel cell flooding in a closed environment constructed in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydrogen-oxygen fuel cell in a preferred embodiment of the present invention, wherein (a) is a schematic diagram of an anode and (b) is a schematic diagram of a cathode.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-a hydrogen gas supply cylinder, 2-an oxygen gas supply cylinder, 3-a first pressure maintaining valve, 4-a second pressure maintaining valve, 5-a first electromagnetic valve, 6-a second electromagnetic valve, 7-a third electromagnetic valve, 8-a fuel cell stack, 9-a fourth electromagnetic valve, 10-a first buffer tank and 11-a second buffer tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 2, the schematic structural diagram of the hydrogen-oxygen fuel cell in the preferred embodiment of the present invention includes a gas supply unit, a pulse unit and a fuel cell stack 8, wherein the gas supply unit includes a hydrogen gas supply gas path and an oxygen gas supply gas path, a hydrogen gas supply cylinder 1 in the hydrogen gas supply gas path is connected to the fuel cell stack 8 through a first pressure maintaining valve 3 and a first electromagnetic valve 5, and an oxygen gas supply cylinder 2 in the oxygen gas supply gas path is connected to the fuel cell stack 8 through a second pressure maintaining valve 4 and a second electromagnetic valve 6; the pulse unit comprises a hydrogen pulse gas path and an oxygen pulse gas path, wherein a first buffer tank 10 in the hydrogen buffer gas path is connected with a hydrogen inlet of the fuel cell stack 8 through a third electromagnetic valve 7, and an air outlet of the fuel cell stack 8 is connected with an air inlet of the first buffer tank 10; the second buffer tank 11 in the oxygen buffer gas path is connected with the oxygen inlet of the fuel cell stack 8 through the fourth electromagnetic valve 9, and the air outlet of the fuel cell stack 8 is connected with the air inlet of the second buffer tank 11.
As shown in fig. 1, an embodiment of the present invention provides a method for solving the problem of flooding of hydrogen-oxygen fuel cells in a closed environment, comprising the following steps:
s1 setting protection voltage VpBuffer pressure P1And the pulse voltage drop is reduced by alpha percent, and the initial voltage V of the hydrogen-oxygen fuel cell during stable operation is recorded0Initial cell voltage delta0i(i-1, 2,3 … … n) and initial average voltage
n is the number of monocells;
s2 detecting single voltage V of hydrogen-oxygen fuel celliAnd calculating an average voltage based thereon
Then, the monomer voltage deviation ratios beta are calculated respectively by using the following formulaiProportional to average voltage deviation
Judging the deviation ratio beta of the cell voltageiProportional to average voltage deviation
Whether all the voltage drop is less than the pulse voltage drop reduction proportion alpha%, if so, judging that the state of the hydrogen-oxygen fuel cell is normal without subsequent steps; if not, representing that the accumulation of moisture and impurity gas in the system has affected the performance of the fuel cell stack, determining that the hydrogen-oxygen fuel cell has a water flooding risk, and entering step S3;
s3 closing the first solenoid valve 5 and the second solenoid valve 6, opening the third solenoid valve 7 and the fourth solenoid valve 9, using the first buffer tank 10 and the second buffer tank 11 to replace the hydrogen gas supply cylinder 1 and the oxygen gas supply cylinder 2 to supply gas for the fuel cell stack, if the single voltage ViOr average voltage
Below the protective voltage VpIf so, starting a protection mechanism, automatically cutting off the load and switching to nitrogen purging; if the voltage of the cell ViAnd average voltage
Are all higher than or equal to the protective voltage VpThen the hydrogen gas of the first buffer tank 10 is buffered to pressure PHPAnd the oxygen buffer pressure P of the second buffer tank 11OPAnd a buffer pressure P1Comparing when any one of the pressure values is less than the buffer pressure P1When the fuel cell stack 8 is started, the first electromagnetic valve 5 and the second electromagnetic valve 6 are opened, the third electromagnetic valve 7 and the fourth electromagnetic valve 9 are closed, and the hydrogen gas supply cylinder 1 and the oxygen gas supply cylinder 2 are reused for supplying gas to the fuel cell stack; at this point, the voltage and pressure will rise rapidly and the water on the anode side of the stack will pass through the pressure differential Δ PH＝PH-PHPThe generated driving force is greatly carried out, and water at the cathode side in the cell stack passes through the pressure difference delta PO＝PO-POPThe generated driving force is largely taken out, where Δ PHIs the anode side pressure difference, PHIs the hydrogen inlet pressure, PHPBuffer pressure for hydrogen, Δ POPressure difference of cathode side, POFor oxygen inlet pressure, POPBuffering the pressure for oxygen;
s4 repeating the steps S2 and S3 and recording the supply time of the hydrogen gas supply cylinder 1 and the oxygen gas supply cylinder 2, namely the pulse period TiSimultaneously recording the air supply time of the first buffer tank 10 and the second buffer tank 11, namely the impulse response time TPiI is the number of times of executing the step S3, and the fuel cell is stopped until the cycle number reaches a preset period, so that the problem of flooding of the hydrogen-oxygen cell in the closed environment is solved in a pulse mode;
further, a protective voltage Vp0.25-0.35V, and preferably 0.3V to ensure the safe operation of the hydrogen-oxygen fuel cell. The pressure difference between the buffer pressure and the air inlet pressure is water removal power, the smaller the buffer pressure is, the larger the pressure difference is, the better the water removal effect is, but the too low buffer pressure can cause fuel starvation, so the buffer pressure P1Is 0.2atm or more. The pulse voltage drop is the pressure drop ratio of the voltage before pulse execution relative to the stable operation stage, which represents the attenuation of the accumulation of liquid water and impurity gas to the performance along with the closed operation of the fuel cell stack, and is used for ensuring the stability, high efficiency and the like of the fuel cell systemThe reduction ratio of the pulse voltage drop is 2% -15%, and the effective removal of liquid water on the proton exchange membrane and the small-range return of the performance of the electric pile can be realized under the condition of having the smallest influence on the output performance of the fuel cell pile through the interaction of the parameters, so that the stable and efficient operation of the fuel cell system is ensured.
Further, the first electromagnetic valve 5 and the second electromagnetic valve 6 are normally open type electromagnetic valves, and the third electromagnetic valve 7 and the fourth electromagnetic valve 9 are normally closed type electromagnetic valves; the pressure difference Δ P generated in step S3HAnd Δ POShould be above 0.3atm, and preferably 0.5atm to 1.0 atm.
Further, the fuel cell stack is vertically arranged to assist in water drainage; the first buffer tank 10 and the second buffer tank 11 are preferably acrylic cylinder walls with the pressure resistance of more than 2.5Mpa, and the bottom cover of the stainless steel top cover is a transparent tank body fastened by bolts.
In the method provided by the invention, a humidifier is not required to be arranged at the gas supply unit, the pulse unit can also be provided with a gas-liquid separator, and the outlet of the gas-liquid separator is connected with the inlet of the fuel cell stack, so that the effect of auxiliary drainage can be achieved. The invention provides a control method for monitoring the single state of the fuel cell system, performing combined drainage and improving the fuel utilization rate, which is convenient to realize, and a pulse dewatering method based on voltage monitoring is repeated on the basis of ensuring the stable output of the fuel cell by combining the actual use requirements of the closed fuel cell system of underwater power equipment such as a submarine vehicle, an unmanned ship and the like and the internal structure of a galvanic pile. The method can be realized on a controller in the actual process of actual underwater power equipment, and has the advantages of rapid judgment and good actual application effect.
The technical solution provided by the present invention is further explained below according to specific embodiments.
(1) The fuel cell is stably operated, and a protection voltage V is set00.3V, 10% of the pulse voltage drop rate alpha, and the buffer pressure P1Recording initial voltage V of fuel cell in stable operation00.75V, fuel cell stack hydrogen inlet pressure PH0.8atm and oxygen inlet pressure PO0.8atm hydrogenBuffer pressure PHPAnd oxygen buffer pressure POPVoltage of each cell delta0i(i ═ 1,2,3 … … 10), and average voltage
Detecting single voltage V of fuel celliCalculating the average voltage deviation value
Due to the fact that
The step (2) is carried out when the reduction ratio is equal to the preset reduction ratio alpha%;
(2) the first solenoid valve 5 and the second solenoid valve 6 are closed, the third solenoid valve 7 and the fourth solenoid valve 9 are open, the pulse period T1At 3 hours, the hydrogen buffer pressure PHPDecreasing the pressure to 0.2atm, and entering the step (3);
(3) the first solenoid valve 5 and the second solenoid valve 6 are opened, the third solenoid valve 7 and the fourth solenoid valve 9 are closed, the above-mentioned response actions are carried out simultaneously, TP1Voltage and pressure rise rapidly back to 2 s;
(4) after long-time operation, the steps (2) and (3) are switched for a plurality of times, and the pulse period T is recorded2＝2.7h，T3＝2.2h，T41.6h and an impulse response time TP2＝2.12s，TP3＝1.95s，TP3＝2.02s。
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (8)
1. A method for addressing the problem of flooding a hydrogen-oxygen fuel cell in an enclosed environment, the method comprising the steps of:
s1 setting protection voltage VpBuffer pressure P1And the pulse voltage drop reduction proportion is alpha percent, and the stability of the hydrogen-oxygen fuel cell is recordedInitial voltage V at regular time0Initial cell voltage delta0iI-1, 2,3 … … n and an initial average voltage
n is the number of monocells;
s2 detecting the single voltage V of the hydrogen-oxygen fuel celliAnd calculating an average voltage based thereon
Then, the monomer voltage deviation ratios beta are calculated respectively by using the following formulaiProportional to average voltage deviation
Judging the deviation ratio beta of the cell voltageiProportional to average voltage deviation
If all the hydrogen-oxygen fuel cells are smaller than the pulse voltage drop reduction proportion alpha%, judging that the hydrogen-oxygen fuel cells are normal in state without subsequent steps, otherwise, judging that the hydrogen-oxygen fuel cells have a water flooding risk and entering step S3;
s3 the buffer tank is used to replace the gas cylinder to supply gas to the fuel cell stack if the voltage of the single body is ViOr average voltage
Below the protective voltage VpIf so, starting a protection mechanism, automatically cutting off the load and switching to nitrogen purging;if the voltage of the cell ViAnd average voltage
Are all higher than or equal to the protective voltage VpThen the hydrogen is buffered to the pressure PHPAnd oxygen buffer pressure POPAnd a buffer pressure P1Comparing when any one of the pressure values is less than the buffer pressure P1When the fuel cell is used, the gas supply cylinder is reused for supplying gas to the fuel cell, and water in the fuel cell stack is taken out through pressure difference;
s4 repeats steps S2, S3 until the fuel cell stops, so as to solve the problem of flooding of the hydrogen-oxygen cell in the closed environment by means of pulse.
2. The method of addressing hydrogen-oxygen fuel cell flooding in an enclosed environment of claim 1, wherein said protection voltage Vp0.25-0.35V.
3. The method of addressing hydrogen-oxygen fuel cell flooding in an enclosed environment of claim 1, wherein said protection voltage VpIt was 0.3V.
4. The method of solving a hydrogen-oxygen fuel cell flooding problem in an enclosed environment of claim 1, wherein said buffer pressure P1Is 0.2atm or more.
5. The method of addressing hydrogen-oxygen fuel cell flooding in an enclosed environment of claim 1, wherein said pulsed voltage drop reduction ratio is between 2% and 15%.
6. The method of solving a water flooding problem with a hydrogen-oxygen fuel cell in a closed environment as claimed in claim 1, wherein the pressure difference generated in step S3 is between 0.5atm and 1.0 atm.
7. The method for solving the problem of flooding of hydrogen-oxygen fuel cells in a closed environment as claimed in claim 1, wherein the solenoid valve for controlling the gas supply of the gas cylinder in the hydrogen-oxygen fuel cell is a normally open solenoid valve, and the solenoid valve for controlling the gas supply of the buffer tank is a normally closed solenoid valve.
8. The method for solving the problem of flooding hydrogen-oxygen fuel cells in an enclosed environment as claimed in any one of claims 1 to 7, wherein said fuel cell stack is vertically disposed to assist in draining water.
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| CN113764703A (en) * | 2021-11-09 | 2021-12-07 | 北京新研创能科技有限公司 | Fuel cell anode pulse discharge control method, device and readable storage medium |
| CN113964351A (en) * | 2021-10-08 | 2022-01-21 | 北京格睿能源科技有限公司 | Pile water flooding prevention method and device based on pressure monitoring and water reverse osmosis regulation |
| CN115360387A (en) * | 2022-10-20 | 2022-11-18 | 佛山市清极能源科技有限公司 | Anode water quantity control method of fuel cell system |
| CN115632141A (en) * | 2022-12-22 | 2023-01-20 | 潍柴动力股份有限公司 | Vehicle-mounted fuel cell stack self-humidification control method and vehicle |
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