CN116979099A - Method for relieving steady-state operation attenuation of proton exchange membrane fuel cell - Google Patents
Method for relieving steady-state operation attenuation of proton exchange membrane fuel cell Download PDFInfo
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- CN116979099A CN116979099A CN202311081441.4A CN202311081441A CN116979099A CN 116979099 A CN116979099 A CN 116979099A CN 202311081441 A CN202311081441 A CN 202311081441A CN 116979099 A CN116979099 A CN 116979099A
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- 239000000446 fuel Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000012528 membrane Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000001257 hydrogen Substances 0.000 claims description 24
- 229910052739 hydrogen Inorganic materials 0.000 claims description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000110 cooling liquid Substances 0.000 claims description 18
- 230000015556 catabolic process Effects 0.000 claims description 7
- 238000006731 degradation reaction Methods 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 230000010287 polarization Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011056 performance test Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 2
- 230000000116 mitigating effect Effects 0.000 claims 7
- 239000003054 catalyst Substances 0.000 abstract description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 229910052697 platinum Inorganic materials 0.000 abstract description 3
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- 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
- H01M8/0438—Pressure; Ambient pressure; Flow
Abstract
The application discloses a method for relieving steady-state operation attenuation of a proton exchange membrane fuel cell, which uses the existing fuel cell testing equipment, and changes parameters such as current, oxidant flow and the like in the operation process of a PEMFC from the principle of the fuel cell. So that short undergassing and hydrothermal balance state are generated inside the battery. The reversible attenuation in the steady-state operation process of the battery is automatically repaired, no extra equipment is needed, and the stable and efficient operation of the proton exchange membrane fuel cell system can be ensured. The method can enable the fuel cell to generate a reduction state atmosphere in steady-state operation, self-clean the cathode platinum catalyst, promote the discharge of liquid water accumulated in the cell, improve the hydrothermal balance and further recover the performance. And the performance attenuation of the fuel cell under the steady-state working condition is relieved.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a method for relieving steady-state operation attenuation of a proton exchange membrane fuel cell.
Background
Under the background that petrochemical energy is not renewable and environmental pollution is increasingly severe, proton Exchange Membrane Fuel Cells (PEMFCs) have the advantages of high energy conversion rate, no pollution, high response speed, capability of starting operation in a low-temperature environment and the like. The method is widely focused on the fields of new energy automobiles, portable power supplies, distributed power generation and the like.
The problems of poor reliability, short service life and the like commonly existing in the current fuel cell industry restrict the commercialization process of the fuel cell, and the attenuation of the cell performance is the process of long-time fatigue accumulation under severe environment. Steady state operation refers to an operation state in which the fuel cell continuously outputs electric energy to the outside in a constant mode (constant voltage or constant current, temperature and pressure are relatively unchanged). In the actual operation process of the PEMFC system, steady-state operation is a very common application scenario, for example: the fuel cell automobile is in a suburb or high-speed fixed speed fly, and a power station with combined heat and electricity supplies continuous electric energy for users. Due to the unreasonable design of the bipolar plate flow field and the limiting factors such as the difference of the water separator capability, the system cannot timely remove the water in the MEA, so that the output power is fluctuated. The battery can be operated at high potential for a long time to form an oxide layer on the surface of the catalyst, and the performance is gradually reduced. And finally, irreversible damage is caused. It becomes particularly important how the fuel cell achieves a constant self-healing internally generated reversible decay in steady state operation.
Disclosure of Invention
According to the problems existing in the prior art, the application discloses a method for relieving steady-state operation attenuation of a proton exchange membrane fuel cell, which comprises the following steps of;
s1: designing a first operation condition according to the use requirement of the proton exchange membrane fuel cell system in a steady-state practical application scene;
s2: a proton exchange membrane electrode, a corresponding bipolar plate and a clamp form a steady-state short stack, the air tightness of the initially assembled steady-state short stack is detected, and the short stack with qualified air tightness is transferred to a fuel cell test system;
s3: preheating the water tank and the humidifying pot, setting the rotating speed of the water pump, continuously circulating and introducing cooling liquid into the electric pile, and enabling the electric pile to reach the set temperature;
s4: when the dew point temperature of the humidifying tank reaches a set value, a hydrogen path proportional valve and an empty path flow controller are regulated, hydrogen with certain pressure is introduced into an anode inlet, and a certain amount of oxygen is introduced into a cathode inlet;
s5: after the open circuit voltage values of all the sections reach stability, carrying out on-line activation treatment on the battery;
s6: performing relevant performance test on the electric pile according to the requirements of the task book, inputting a designed operation condition I, adopting an upper computer to automatically operate a test program, and performing polarization curve test at regular intervals;
s6: and designing a second operating condition, repeating the steps S2 to S6, and finishing and analyzing the related data after the second operating condition is finished.
Further, the first operating condition is a document for converting the operating conditions in the actually measured system of the fuel cell into various temperature, pressure and flow parameter information operating on the bench test system, and identifying and operating by the upper computer software.
Further, the second operation condition is: the air metering ratio in the loading process is changed by increasing the rapid loading process, so that an underair state is caused, a low-voltage atmosphere which is favorable for cleaning the surface of the catalytic layer is generated, the catalytic layer continuously operates at the peak value, and the hydrothermal state in the reactor is adjusted.
Further, the fuel cell test system includes: the system comprises an air supply system, a pressure reducing valve, a proportional valve, a flow controller, a humidifying tank, a plurality of sensors, a cooling liquid circulating system, a control system and an upper computer, wherein the cooling liquid circulating system comprises a water tank, a heating rod, a water pump and a heat exchanger, and the control system is provided with a signal acquisition function, a data recording function and a parameter adjustment command issuing function.
Further, the cooling liquid comprises deionized water and glycol antifreezing solution, wherein the temperature range of the cooling liquid is-40-90 ℃.
Further, hydrogen at a certain pressure means that the hydrogen pressure is lower than the destruction pressure of the proton exchange membrane.
Furthermore, the task book comprises data of experimental purposes, the size of a to-be-tested electric pile, the number of the to-be-tested electric pile, an electric pile test flow, conditions of activation and polarization curve operation and a disposal method when an electric pile is unexpected.
Due to the adoption of the technical scheme, the method for relieving steady-state operation attenuation of the proton exchange membrane fuel cell has the following beneficial effects:
(1) The application combines the fuel cell principle and the actual measurement experience, and enables the electric pile to automatically generate a recovery atmosphere by adjusting the loading current and the loading air quantity of the electric pile in the steady-state operation process, thereby having a promotion effect on slowing down the attenuation rate of the electric pile. The method is simple and easy to realize.
(2) The application uses the existing equipment of the fuel cell system, has low cost and high feasibility, and can be restored without disassembly.
(3) The application establishes a feasible steady-state power generation working condition and provides a reference for the steady operation of a fuel cell power generation system applied in a later scale level.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a fuel cell stack testing system according to the present application
FIG. 2 is a schematic diagram of steady state operation in the present application
FIG. 3 is a schematic diagram of a steady state condition in the present application
FIG. 4 is a graph showing the average voltage variation at the rated point of the short stack after the operation in the working condition
Detailed Description
In order to make the technical scheme and advantages of the present application more clear, the technical scheme in the embodiment of the present application is clearly and completely described below with reference to the accompanying drawings in the embodiment of the present application:
the application discloses a method for relieving steady-state operation attenuation of a proton exchange membrane fuel cell, which is realized based on a proton exchange membrane fuel cell short stack and a fuel cell test system, wherein the fuel cell test system is shown in figure 1 and comprises an air supply part: hydrogen source and air source, pressure reducing valve, flow controller, proportional valve, humidifier, temperature and pressure sensor, etc. And (3) a cooling system: water tank, heating rod, water pump, etc. The upper computer is used for collecting, recording and collecting data such as temperature, battery voltage, gas pressure and the like, and can also perform the functions of changing loading current, fuel and oxidant flow and the like. In the long-time steady-state operation process of the fuel cell, the capability of the water separator is reduced due to the fluctuation of the supply of the oxidant, the generated water cannot be removed in time due to the unreasonable electric pile structural design and other factors, the flow channel and the gas diffusion layer are blocked by the accumulation of liquid water, and the output power of the system is reduced. On the other hand, as the cathode is always at high potential in the operation process of the proton exchange membrane fuel cell, oxides can continuously exist on the surface of the platinum catalyst to cover the active sites where oxygen should react, and irreversible attenuation can be caused for a long time. The application uses the existing test equipment and resources, and starts from the theoretical and actual measurement experience of the fuel cell. The proton exchange membrane fuel cell realizes self-recovery under steady state operation by changing the operation steps of the fuel cell and adjusting the gas flow; the method specifically comprises the following steps:
s1, according to the use requirement of the proton exchange membrane fuel cell system in a steady-state practical application scene, writing an operation working condition 1 as shown in figure 2.
S2, using a self-produced proton exchange membrane electrode, a corresponding bipolar plate, a clamp and the like to form 15 sections of short stacks (named steady-state short stacks), detecting the air tightness of the short stacks after initial assembly, transferring the short stacks with qualified air tightness to a fuel cell test system, and accurately connecting a pipeline and a circuit
And S3, preheating the water tank and the humidifying pot, and continuously circulating cooling liquid into the electric pile at the set rotating speed of the water pump to enable the electric pile to reach the set temperature.
And S4, when the dew point temperature of the humidifying tank reaches a set value, regulating a hydrogen path proportional valve and an empty path flow controller, introducing hydrogen with certain pressure into an anode inlet, and introducing a certain amount of oxygen into a cathode inlet. The anode inlet pressure is kept to be always 10-15 Kpa higher than the cathode inlet pressure.
And S5, after the open circuit voltage value of each section reaches a stable value, activating the battery on line. The method comprises the following steps: and inputting loading current into the upper computer, stably running for a period of time after the loading current reaches a preset value, then reducing the load to an open-circuit state, stopping the supply of gas and cooling liquid, and standing for 10min. Repeating the step 5 until the average voltage of the electric pile is not increased any more, and completing the activation.
And S6, performing relevant performance test on the electric pile according to the requirements of the task book, inputting the written working condition 1, and automatically running a test program by the upper computer. Polarization curves and the like were tested every 200 hours. And stopping running the finishing data after 400 hours.
S7, writing the improved operation condition 2 as shown in FIG. 3. And repeating the steps S2-S6, and finishing the related data after the operation of the working condition 2 is finished, so as to analyze.
The system described in S1 is a fuel cell power generation system having a rated power of the order of kw, which is composed of a plurality of fuel cells.
The actual application scene requirements in S1 refer to the current density, water temperature, air metering ratio, hydrogen inlet pressure, air inlet pressure, hydrogen inlet leakage point temperature, air inlet leakage point temperature and the like when the design and operation of the kilowatt-level fuel cell system are carried out with the aim of meeting the electricity requirements of customers as the core.
The first working condition in the step S1 is a document which is introduced in the step S1, converts the running condition in the actually measured system into various temperature, pressure, flow parameters and the like which can run on the bench test system and can be identified and run by the upper computer software.
The air tightness inspection in S2 is the test of leakage of three cavities (hydrogen cavity, cavity and water cavity) of the electric pile, the leakage of hydrogen and cavity channeling cooling liquid cavity, the mutual leakage of hydrogen and cavity, the leakage of hydrogen single cavity and the like.
The test system in S2 includes an air supply system with an air source, a pressure reducing valve, a proportional valve, a flow controller, a humidification tank, temperature and pressure sensors, etc. A cooling liquid circulation system with a water tank, a heating rod, a water pump, a heat exchanger and the like. The control system and the upper computer are provided with the capabilities of collecting signals, recording data and sending parameter adjustment instructions.
The cooling liquid in S3 includes: deionized water and glycol antifreezing solution, the temperature of the cooling liquid is-40-90 DEG C
The hydrogen with certain pressure in the S4 means that the hydrogen pressure is lower than the breaking pressure of the proton exchange membrane, so that the anode can rapidly discharge air and is full of hydrogen.
And S5, the upper computer is responsible for parameter setting, and mainly comprises the setting of parameters such as gas flow, a humidification tank, a heating belt, water tank temperature and the like. The upper computer is connected with the control system and sends the input instruction to the control system to realize the effective control of the whole fuel cell system
The task book in S6 refers to a specification comprising the size, the number of sections, the test flow of the electric pile to be tested, the operating conditions of the activation and polarization curves and the handling method when the electric pile is unexpected for experimental purposes.
The improved operation condition in S7 means that conditions such as current and flow in the operation process of the galvanic pile are consistent with those in the steady-state condition 1, and the loading gas amount and the operation steps are changed based on actual measurement experience and principles.
Further, as shown in Table 1 and FIG. 2,
table one: description of working condition 1
| Step (a) | Description of the application |
| 1 | Idle speed steady operation |
| 2、6、10 | Steady state power generation operation |
| 3、7 | Load reduction |
| 4、8 | Low output power operation |
| 5、9 | Lifting load |
| 11 | Load shedding and ending operation |
And (II) table: description of working condition 2 steps
| Step (a) | Description of the application |
| 1 | Idle steady state operation |
| 2、7、12、17 | Steady state power generation operation |
| 3、8、13 | Load reduction |
| 4、9、14 | Low output power operation |
| 5、10、15 | Lifting load |
| 6、11、16 | Peak current promotes hydrothermal equilibrium operation |
| 18 | Load shedding, ending the operation |
Examples:
(1) Steady state condition 1 is written as in fig. 2. The working condition adopts a current regulation method, and the single cycle time is 12 hours, and consists of operation steps 4, 8 and 10 which are operated for 4 hours and other load and unload operations. The method comprises the steps of starting up and loading the stack into the step 1 to enable the stack to enter an idle running state, loading the stack into a steady state rated point after each parameter is stabilized, carrying out load reduction into the step 4 after running for 4 hours, and loading the stack into the step 5 to carry out steady state running after stabilizing. The previous operation is repeated until the pile operation is finished in step 11.
(2) The improved steady state condition 2 is written as shown in fig. 3 and 4. The working condition adopts a current regulation method, the single cycle time is 4h, and the working condition consists of 4 steps 2, 7, 12 and 17 which are operated in a steady state for 1 h. The method comprises the steps of starting up and loading to a step 1, enabling a galvanic pile to perform an idle running state, loading parameters to steady state rated points after stabilizing, and unloading from the step 3 to a step 4 after running for 1h, wherein the difference between the loading step 5 and the step 5 in the working condition 1 is that the air flow in the loading process is regulated, so that a short-term lower potential is generated on a battery catalytic layer, self-cleaning of catalyst particles is easier to realize in a reducing atmosphere, and the running of the galvanic pile under the peak current of the step 6 is more beneficial to the hydrothermal rebalancing in the MEA. The preceding steps are repeated until the end of operation of step 18, improving the internal continuously deteriorating environment of the battery under long-term steady-state operation, alleviating performance degradation.
(3) Initial air tightness test is carried out on the stable state 1 short stack, including three-cavity pressure maintaining, hydrogen cavity water stringing and hydrogen cavity mutual stringing test, and connecting the short stack to a test system after the test result meets the factory requirement.
(4) And (3) after the hydrogen, the empty water channel and the load line of the steady-state 1 short stack are correctly connected, introducing cooling liquid with set temperature. After hydrogen and air, fully activating the electric pile after the open circuit consistency of the electric pile is not abnormal.
(5) And leading in the written steady-state working condition 1, and running an automatic program after the humidifying temperature and the cooling liquid temperature reach the set values.
(6) After 400 hours of operation, the experiment was stopped and the data were collated.
(7) And (3) repeating the operations (3) - (5) by using the steady-state 2 short stack and the steady-state working condition 2, and finishing and analyzing the data after the operation is finished.
The application establishes a feasible steady-state power generation working condition, and verifies the reasonable and feasible working condition through the operation of short stack durability.
According to the application, from the electrochemical principle, through adjusting the air flow in the pulling and loading process, the battery catalytic layer reaches a transient undergas environment, a potential in a reduction state is created, and the oxide on the surface of the platinum catalyst is repaired due to long-time steady-state operation.
The application combines the rapid pulling and loading in the running process with the running of the peak power platform, so that the reduced impurities on the surface of the catalyst are rapidly blown out, the hydrothermal balance can be promoted in the short-time running of the peak power, and the continuous restoration of reversible attenuation is realized
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme of the present application and the inventive concept thereof, and should be covered by the scope of the present application.
Claims (7)
1. A method for mitigating steady state operating decay of a proton exchange membrane fuel cell, comprising:
s1: designing a first operation condition according to the use requirement of the proton exchange membrane fuel cell system in a steady-state practical application scene;
s2: a proton exchange membrane electrode, a corresponding bipolar plate and a clamp form a steady-state short stack, the air tightness of the initially assembled steady-state short stack is detected, and the short stack with qualified air tightness is transferred to a fuel cell test system;
s3: preheating the water tank and the humidifying pot, setting the rotating speed of the water pump, continuously circulating and introducing cooling liquid into the electric pile, and enabling the electric pile to reach the set temperature;
s4: when the dew point temperature of the humidifying tank reaches a set value, a hydrogen path proportional valve and an empty path flow controller are regulated, hydrogen with certain pressure is introduced into an anode inlet, and a certain amount of oxygen is introduced into a cathode inlet;
s5: after the open circuit voltage values of all the sections reach stability, carrying out on-line activation treatment on the battery;
s6: performing relevant performance test on the electric pile according to the requirements of the task book, inputting a designed operation condition I, adopting an upper computer to automatically operate a test program, and performing polarization curve test at regular intervals;
s6: and designing a second operating condition, repeating the steps S2 to S6, and finishing and analyzing the related data after the second operating condition is finished.
2. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the first operating condition is a document for converting the operating conditions in the actually measured system of the fuel cell into various temperature, pressure and flow parameter information operating on the bench test system, and identifying and operating the information by the upper computer software.
3. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the second operation condition is as follows: the air metering ratio in the loading process is changed by increasing the rapid loading process, so that an underair state is caused, a low-voltage atmosphere which is favorable for cleaning the surface of the catalytic layer is generated, the catalytic layer continuously operates at the peak value, and the hydrothermal state in the reactor is adjusted.
4. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the fuel cell test system includes: the system comprises an air supply system, a pressure reducing valve, a proportional valve, a flow controller, a humidifying tank, a plurality of sensors, a cooling liquid circulating system, a control system and an upper computer, wherein the cooling liquid circulating system comprises a water tank, a heating rod, a water pump and a heat exchanger, and the control system is provided with a signal acquisition function, a data recording function and a parameter adjustment command issuing function.
5. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the cooling liquid comprises deionized water and glycol antifreezing solution, wherein the temperature range of the cooling liquid is-40-90 ℃.
6. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the hydrogen with certain pressure means that the hydrogen pressure is lower than the breaking pressure of the proton exchange membrane.
7. A method for mitigating steady state operation degradation of a proton exchange membrane fuel cell according to claim 1, wherein: the task book comprises data of experimental purposes, the size of a to-be-tested electric pile, the number of electric pile sections to be tested, the test flow of the electric pile, the operation conditions of activation and polarization curves and a disposal method when the electric pile is unexpected.
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| CN202311081441.4A CN116979099A (en) | 2023-08-25 | 2023-08-25 | Method for relieving steady-state operation attenuation of proton exchange membrane fuel cell |
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| CN202311081441.4A CN116979099A (en) | 2023-08-25 | 2023-08-25 | Method for relieving steady-state operation attenuation of proton exchange membrane fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117239183A (en) * | 2023-11-15 | 2023-12-15 | 北京新研创能科技有限公司 | Shutdown method of fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239183A (en) * | 2023-11-15 | 2023-12-15 | 北京新研创能科技有限公司 | Shutdown method of fuel cell |
| CN117239183B (en) * | 2023-11-15 | 2024-02-13 | 北京新研创能科技有限公司 | Shutdown method of fuel cell |
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