CN110676485B - Universal fuel cell activation testing method - Google Patents
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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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
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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
Abstract
The invention discloses a universal fuel cell activation testing method. The invention takes the characteristics of different fuel cells into full consideration, designs the activation scheme of the invention, and can find a proper activation method in the shortest time due to different fuel cell performances.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a universal fuel cell activation testing method.
Background
A fuel cell is a chemical device that directly converts chemical energy of a fuel and an oxidant into electrical energy and releases heat without undergoing a carnot cycle. The fuel cell has the advantages of high energy conversion efficiency, low pollution, low noise and the like, and is highly valued by all countries in the world. In particular, in the automotive field, japan, honda, and korea have now publicly sold (including rented) fuel cell commercial passenger cars, and the domestic shanghai automobile group has also sold fuel cell automobiles in small quantities.
To meet the commercialization requirements of fuel cell vehicles, fuel cells must have good reliability, long life, and low cost, in addition to further increasing performance requirements. In the case of a fuel cell stack for a vehicle, the MEA is a core component for power generation. The performance of the MEA determines the output performance of the stack, and therefore, the performance output of the MEA is critical. The MEA needs to be activated before being used normally, and the activation procedure determines the performance of the MEA in the later period and has important influence on the development efficiency of the cell.
CN101414688 discloses a method for activating a fuel cell. The method comprises the following steps: the first step, the output current of the fuel cell is forcibly increased continuously and sectionally, and the output voltage of the fuel cell is reduced; a second step of continuously reducing the output current of the battery in stages to increase the output voltage of the battery; and repeating the two steps until the rated output performance of the battery is achieved. The method does not consider the characteristics of different fuel cells and has poor adaptability.
CN101459250 discloses a method for activating a polymer electrolyte membrane fuel cell MEA using cyclic voltammetry. The method comprises the following steps: (1) supplying humidified gas to a fuel cell to hydrate an electrolyte membrane and an electrode electrolyte of the fuel cell; (2) cyclic voltammetry treatment was performed to activate the electrode layer. The method does not consider the characteristics of different fuel cells, has low adaptability and has undesirable activation effect.
Therefore, there is a need in the art for a novel activation method for fuel cells, which is simple in process, strong in adaptability and good in activation effect.
Disclosure of Invention
The invention aims to provide a universal fuel cell activation testing method. The method can fully consider the characteristics of different fuel cells, and has the advantages of strong universality, short activation time and good activation effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
one of the objectives of the present invention is to provide a universal activation testing method for fuel cells, which comprises the following steps:
(1) respectively introducing fuel gas and air into the anode and the cathode of the fuel cell to carry out a discharging process, operating for a period under the current density increased in a stepped manner, and repeatedly operating for n periods until the variation amplitude of the final voltage V1 is less than or equal to 2mV, thereby completing activation;
(2) in the operation process of the step (1), if the voltage value of the single chip under the corresponding current density is smaller than the normal voltage value under the current density, suspending the step (1), adjusting the current density to be the activated current density, discharging at constant current under the activated current density until the variation amplitude of the final voltage V2 is less than or equal to 2mV, and finishing the activation;
(3) and (3) in the operation process of the step (2), if the voltage value of the single chip corresponding to the activation current density is smaller than the normal voltage value under the current density, suspending the step (2), increasing the activation current density in a stepped manner, discharging at constant current under each increased activation current density to the final voltage V3 until the variation amplitude of the final voltage V3 is less than or equal to 2mV, and finishing the activation.
The invention takes the characteristics of different fuel cells into full consideration, designs the activation scheme of the invention, and can find a proper activation method in the shortest time by adopting the method of the invention because of different performances of different fuel cells.
In step (2) of the present invention, if the monolithic voltage value at the corresponding current density is smaller than the normal voltage value at the current density (the normal voltage value is the minimum voltage value at a fixed current density under the condition that the fuel gas and the air flow are fixed), suspending step (1), and exemplarily: the invention adopts 0.4A/cm2、0.7A/cm2、1.0A/cm2、1.3A/cm2And 1.6A/cm2Activation was carried out at a current density (stepwise growth of 0.3A/cm2) If the voltage under any current density is smaller than the normal value of the monolithic voltage, pausing and directly carrying out the subsequent activation current density activation process;
step (3) of the present invention is, for example: the activation current density adopted by the invention is 0.7A/cm2When the voltage value of the corresponding single chip is less than 0.64V under the current density, the current is paused, and then the activation current density is increased to 0.8A/cm2(stepwise growth of 0.1A/cm2) If the voltage is not less than the corresponding single-chip voltage value all the time and the final voltage V3 variation amplitude is less than or equal to 2mV under the current density, the test is finished, otherwise, the activation current density needs to be increased continuously.
Preferably, in the discharging process in the step (1), the initial current density of discharging is 0-0.4A/cm2E.g. 0.01A/cm2、0.05A/cm2、0.1A/cm2、0.15A/cm2、0.2A/cm2、0.25A/cm2、0.3A/cm2Or 0.35A/cm2And the like.
Preferably, in the discharging process in the step (1), the final current density of discharging is 1.6-1.8A/cm2For example 1.62A/cm2、1.65A/cm2、1.68A/cm2、1.7A/cm2、1.72A/cm2、1.75A/cm2Or 1.78A/cm2And the like.
Preferably, the step increasing amount of the step-type increasing current density in the step (1) is 0.3-0.6A/cm2E.g. 0.32A/cm2、0.35A/cm2、0.38A/cm2、0.4A/cm2、0.42A/cm2、0.45A/cm2、0.48A/cm2、0.5A/cm2、0.52A/cm2、0.55A/cm2Or 0.58A/cm2And the like.
The step increasing amount of the step-type current density increasing is 0.3-0.6A/cm2The step growth is too small, is generated by activationThe water is little, and the load change effect is not obvious; the step growth is too large and the voltage is unstable.
Preferably, in the step (1), the current density is increased in each step, and the operation is performed for 3-5 min, such as 3.5min, 4min, 4.5min or 5min, at the operating current density after the current density is increased.
Preferably, n is more than or equal to 1 in the step (1), preferably 3 to 6, such as 2, 3, 4, 5 or 6.
Preferably, the fuel gas in step (1) is hydrogen.
Preferably, the temperature of the cooling water inlet of the fuel cell in the step (1) is 60 to 70 ℃, for example, 61 ℃, 62 ℃, 63 ℃, 64 ℃, 65 ℃, 66 ℃, 67 ℃, 68 ℃ or 69 ℃.
Preferably, the humidity of the fuel gas and the air introduced into the anode and the cathode respectively in step (1) is 80-95%, for example, 82%, 84%, 85%, 86%, 88%, 90%, 92% or 94%.
Preferably, the stoichiometric ratio of the fuel gas introduced in the step (1) is 1.5-1.8, and the stoichiometric ratio of the air is 2.0-2.2, such as 2, 2.1 or 2.2.
Preferably, the inlet pressure of the anode and the cathode in the step (1) is normal pressure.
Preferably, the final voltage V1 in step (1) is a voltage value corresponding to the final current density of the discharge after repeating the operation for n cycles, and is preferably 0.53-0.57V, such as 0.54V, 0.55V, or 0.56V.
Preferably, in the step (1), the final voltage V1 changes by less than or equal to 2mV by the following steps: the final voltage V1 change amplitude is less than or equal to 2mV within 15-20 min (such as 16min, 17min, 18min or 19 min). For example, 0.2mV, 0.5mV, 0.8mV, 1mV, 1.2mV, 1.5mV, or 1.8mV, etc.
Preferably, the activation current density in the step (2) is 0.5-0.7A/cm2E.g. 0.52A/cm2、0.55A/cm2、0.58A/cm2、0.6A/cm2、0.62A/cm2、0.65A/cm2Or 0.68A/cm2And the like.
The activation current density of the invention is 0.5-0.7A/cm2Activation current densityLarge, unstable voltage during activation; the activation current density is too low, and the activation time is long.
Preferably, the time of the constant current discharge at the activation current density in the step (2) is 2.5-3.5 h, such as 2.6h, 2.7h, 2.8h, 2.9h, 3.0h, 3.1h, 3.2h, 3.3h or 3.4 h.
Preferably, the final voltage V2 in step (2) is a voltage value corresponding to constant current discharge at the activation current density.
Preferably, the activation current density is 0.5-0.6A/cm2The final voltage V2 is 0.71-0.75V, such as 0.72V, 0.73V or 0.74V.
Preferably, the activation current density is 0.61-0.7A/cm2The final voltage V2 is 0.66-0.70V, such as 0.67V, 0.68V or 0.69V.
Preferably, in the step (2), the final voltage V2 changes by less than or equal to 2mV as follows: the final voltage V2 change amplitude is less than or equal to 2mV within 15-20 min (such as 16min, 17min, 18min or 19 min). For example, 0.2mV, 0.5mV, 0.8mV, 1mV, 1.2mV, 1.5mV, or 1.8mV, etc.
Preferably, in the step (2), the current density is adjusted to be the activated current density, the air inlet pressure of the cathode is 70-100 kPa, and the air inlet pressure of the anode is 90-120 kPa. The air inlet pressure of the cathode is 70-100 kPa, such as 72kPa, 75kPa, 78kPa, 80kPa, 82kPa, 85kPa, 88kPa, 90kPa, 92kPa, 95kPa or 98 kPa; the anode has an inlet pressure of 90 to 120kPa, for example, 92kPa, 95kPa, 98kPa, 100kPa, 102kPa, 105kPa, 108kPa, 110kPa, 112kPa, 115kPa, 118kPa, or the like.
Preferably, the inlet pressure of the anode > the inlet pressure of the cathode.
Preferably, the step increasing amount of the step increasing activation current density in the step (3) is 0.1-0.2A/cm2E.g. 0.11A/cm2、0.12A/cm2、0.13A/cm2、0.14A/cm2、0.15A/cm2、0.16A/cm2、0.17A/cm2、0.18A/cm2Or 0.19A/cm2And the like.
The step growth amount is 0.1-0.2A/cm2The step growth amount is too small, and the activation consumption time is long; the step growth amount is too large, and the voltage is unstable during activation.
Preferably, the time of the constant current discharge at each increased activation current density in step (3) is 2.5-3.5 h, such as 2.6h, 2.7h, 2.8h, 2.9h, 3.0h, 3.1h, 3.2h, 3.3h or 3.4 h.
Preferably, the final voltage V3 in step (3) is a voltage value corresponding to constant current discharge at the activation current density, and is preferably 0.65-0.71V, such as 0.66V, 0.67V, 0.68V, 0.69V, or 0.70V.
Preferably, in the step (3), the final voltage V3 changes by less than or equal to 2mV as follows: the final voltage V3 change amplitude is less than or equal to 2mV within 15-20 min (such as 16min, 17min, 18min or 19 min). For example, 0.2mV, 0.5mV, 0.8mV, 1mV, 1.2mV, 1.5mV, or 1.8mV, etc.
As a preferred technical scheme, the activation test method for the universal fuel cell comprises the following steps:
(1) setting the temperature of a cooling water inlet of the fuel cell to be 60-70 ℃, respectively introducing fuel gas and air with the humidity of 80-95% to an anode and a cathode of the fuel cell, wherein the stoichiometric ratio of the introduced fuel gas is 1.5-1.8, and the stoichiometric ratio of the air is 2.0-2.2, and carrying out a discharging process from the initial current density of 0-0.4A/cm2Increasing the current density in a stepwise manner to a final current density of 1.6-1.8A/cm2Each step of increasing a current density, working for 3-5 min at the working current density after increasing the current density, wherein the process is an operation period, and the step increase of the current density is 0.3-0.6A/cm2Repeating the operation for 3-6 cycles until the final voltage V1 is less than or equal to 2mV after 15-20 min, and completing activation;
(2) in the operation process of the step (1), if the voltage value of the single chip under the corresponding current density is smaller than the normal voltage value under the current density, the step (1) is suspended, and the current density is adjusted to be the activated current density of 0.5-0.8A/cm2The cathode has an inlet pressure of 70-100 kPa, the anode has an inlet pressure of 90-120 kPa, and the constant current discharge is in the range of 2.5-E at the activation current density3.5h till the final voltage V2, the variation amplitude is less than or equal to 2mV in 15-20 min, and the activation is finished;
(3) in the operation process of the step (2), if the voltage value of the single chip corresponding to the activation current density is smaller than the normal voltage value under the current density, the step (2) is suspended, the activation current density is increased in a step-by-step manner, and the step increase amount is 0.1-0.2A/cm2And discharging for 2.5-3.5 h at constant current under each increased activation current density until the final voltage V3 reaches the final voltage V3, wherein the change amplitude is less than or equal to 2mV in 15-20 min, and completing activation.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes the characteristics of different fuel cells into full consideration, designs the activation scheme of the invention, and can find a proper activation method in the shortest time by adopting the method of the invention because of different performances of different fuel cells.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
(1) Setting the water inlet temperature of cooling water of the fuel cell at 70 deg.C, introducing fuel gas (hydrogen) with 95% humidity and air to the anode and cathode of the fuel cell respectively, wherein the stoichiometric ratio of the introduced fuel gas (hydrogen) is 1.8, and the stoichiometric ratio of air is 2.0, and performing discharge process at 0.4A/cm2、0.7A/cm2、1.0A/cm2、1.3A/cm2And 1.6A/cm2Sequentially running for 4min under current density till the current density is 1.0A/cm2When the voltage of the single chip is 0.58V (less than 0.6V), pausing;
(2) the current density was adjusted to 0.7A/cm as the activation current density2The cathode inlet pressure is 90kPa, the anode inlet pressure is 100kPa, and the activation current density is 0.7A/cm2And (3) discharging at constant current for 3h (the normal value of the monolithic voltage is always greater than 0.64V), wherein the final voltage V2 is 0.67V, and the change amplitude of the V2 is 1.5mV within 15min, so that the activation is completed.
Example 2
Setting the water inlet temperature of cooling water of the fuel cell at 70 ℃, respectively introducing fuel gas (hydrogen) with the humidity of 95% and air to the anode and the cathode of the fuel cell, wherein the stoichiometric ratio of the introduced fuel gas (hydrogen) is 1.8, and the stoichiometric ratio of the air is 2.0, carrying out a discharge process, and respectively introducing the fuel gas (hydrogen) and the air to the anode and the cathode of the fuel cell to carry out a discharge process, wherein the discharge process is respectively carried out at 0.4A/cm2、0.7A/cm2、1.0A/cm2、1.3A/cm2And 1.6A/cm2And (3) sequentially operating for 4min under the current density, repeatedly operating for 5 periods (in each period, the normal values of the corresponding single-chip voltages under the current density are respectively greater than 0.68V, 0.64V, 0.6V, 0.57V and 0.53V), finally operating at a voltage V1 of 0.55V, and operating at a variation amplitude of 2mV within 15min to complete activation.
Example 3
(1) Setting the water inlet temperature of cooling water of the fuel cell at 65 deg.C, introducing fuel gas with 85% humidity and air with stoichiometric ratio of 1.7 and stoichiometric ratio of 2.2 into the anode and cathode of the fuel cell, respectively, and discharging at 0.4A/cm2、0.8A/cm2、1.2A/cm2And 1.6A/cm2Sequentially running for 5min under current density till the current density is 1.6A/cm2When the voltage of the single chip is 0.51V (less than 0.53V), pausing;
(2) the current density was adjusted to 0.7A/cm as the activation current density2The cathode inlet pressure is 100kPa, the anode inlet pressure is 110kPa, and the activation current density is 0.7A/cm2Discharging with constant current, stopping step (2), adjusting the activation current density to 0.8A/cm2(stepwise growth of 0.1A/cm2) And discharging for 3h at constant current until the final voltage V3 is 0.66V, and the change amplitude is 1.8mV within 20min, thus completing the activation.
Example 4
The difference from example 1 is that the activation current density in step (2) is 0.5A/cm2。
Example 5
The difference from example 1 is that the activation current density in step (2) is 0.7A/cm2。
Example 6
The fuel cell used in this example was the same as in example 1.
(1) Setting the water inlet temperature of cooling water of the fuel cell at 60 deg.C, introducing fuel gas (hydrogen) with 85% humidity and air to the anode and cathode of the fuel cell respectively, wherein the stoichiometric ratio of the introduced fuel gas (hydrogen) is 1.5 and the stoichiometric ratio of air is 2.1, and performing discharge process at 0.4A/cm2、0.7A/cm2、1.0A/cm2、1.3A/cm2And 1.6A/cm2Sequentially running for 5min under current density till the current density is 1.0A/cm2When the voltage of the single chip is 0.57V (less than 0.6V), pausing;
(2) the current density was adjusted to 0.7A/cm as the activation current density2The cathode inlet pressure is 100kPa, the anode inlet pressure is 120kPa, and the activation current density is 0.7A/cm2And (3) performing constant current discharge for 3h (the normal value of the monolithic voltage is always greater than 0.64V), wherein the final voltage V2 is 0.670V, and the change amplitude of the V2 is 1.7mV within 15min, so that the activation is completed.
And (3) performance testing:
the total time for the activation process was recorded for each example and the results are shown in table 1:
TABLE 1
| Activation time (h) | |
| Example 1 | 3.2 |
| Example 2 | 2 |
| Example 3 | 3.3 |
| Example 4 | 3.4 |
| Example 5 | 3.2 |
| Example 6 | 3.2 |
As can be seen from Table 1, the method of the present invention is highly applicable and can rapidly complete activation within a suitable activation procedure.
The present invention is illustrated in detail by the examples described above, but the present invention is not limited to the details described above, i.e., it is not intended that the present invention be implemented by relying on the details described above. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (29)
1. A universal fuel cell activation test method, comprising the steps of:
(1) respectively introducing fuel gas and air into the anode and the cathode of the fuel cell to carry out a discharging process, operating for a period under the current density increased in a stepped manner, and repeatedly operating for n periods until the variation amplitude of the final voltage V1 is less than or equal to 2mV, thereby completing activation;
(2) in the operation process of the step (1), if the voltage value of the single chip under the corresponding current density is smaller than the normal voltage value under the current density, suspending the step (1), adjusting the current density to be the activated current density, discharging at constant current under the activated current density until the variation amplitude of the final voltage V2 is less than or equal to 2mV, and finishing the activation;
(3) and (3) in the operation process of the step (2), if the voltage value of the single chip corresponding to the activation current density is smaller than the normal voltage value under the current density, suspending the step (2), increasing the activation current density in a stepped manner, discharging at constant current under each increased activation current density to the final voltage V3 until the variation amplitude of the final voltage V3 is less than or equal to 2mV, and finishing the activation.
2. The method according to claim 1, wherein the discharge in step (1) has an initial current density of 0 to 0.4A/cm2。
3. The method according to claim 1, wherein the final current density of the discharge during the discharge in the step (1) is 1.6 to 1.8A/cm2。
4. The method of claim 1, wherein the step increase in the stepwise increasing current density of step (1) is 0.3 to 0.6A/cm2。
5. The method of claim 1, wherein step (1) is performed for 3-5 min at the operating current density after increasing the current density for each stepwise increase in current density.
6. The method of claim 1, wherein n.gtoreq.1 in step (1).
7. The method of claim 6, wherein n is 3 to 6.
8. The method of claim 1, wherein the fuel gas of step (1) is hydrogen.
9. The method according to claim 1, wherein the fuel cell of step (1) has a cooling water inlet temperature of 60 to 70 ℃.
10. The method according to claim 1, wherein the humidity of the fuel gas and the air introduced into the anode and the cathode in step (1) is 80-95%.
11. The method of claim 1, wherein the stoichiometric ratio of the fuel gas introduced in step (1) is 1.5 to 1.8, and the stoichiometric ratio of the air is 2.0 to 2.2.
12. The method of claim 1, wherein the inlet pressure of the anode and cathode in step (1) is atmospheric pressure.
13. The method of claim 1, wherein the final voltage V1 in step (1) is a voltage corresponding to a final current density of the discharge after n cycles of repeated operation.
14. The method of claim 13, wherein V1 is 0.53-0.57V.
15. The method as claimed in claim 1, wherein the final voltage V1 in step (1) varies by 2mV or less as: and in 15-20 min, the final voltage V1 variation amplitude is less than or equal to 2 mV.
16. The method of claim 1, wherein the activation current density of step (2) is 0.5 to 0.7A/cm2。
17. The method of claim 1, wherein the constant current discharge time at the activation current density in step (2) is 2.5 to 3.5 hours.
18. The method of claim 1, wherein the final voltage V2 in step (2) is a voltage value corresponding to a constant current discharge at the activation current density.
19. The method of claim 1, wherein the activation current density of step (2) is 0.5 to 0.6A/cm2The final voltage V2 is 0.71-0.75V.
20. The method of claim 19, wherein the activation current density of step (2) is 0.61 to 0.7A/cm2The final voltage V2 is 0.66-0.70V.
21. The method as claimed in claim 1, wherein the final voltage V2 in step (2) varies by 2mV or less as: and in 15-20 min, the final voltage V2 variation amplitude is less than or equal to 2 mV.
22. The method of claim 1, wherein the adjusting of the current density in step (2) is performed so that the cathode has a gas pressure of 70 to 100kPa and the anode has a gas pressure of 90 to 120kPa during the activation of the current density.
23. The method of claim 22, wherein the anode inlet pressure > the cathode inlet pressure.
24. The method of claim 1, wherein the step increase of the stepwise increasing of the activation current density in step (3) is 0.1 to 0.2A/cm2。
25. The method of claim 1, wherein the constant current discharge time at each increased activation current density of step (3) is 2.5 to 3.5 hours.
26. The method of claim 1, wherein the final voltage V3 in step (3) is a voltage value corresponding to a constant current discharge at the activation current density.
27. The method of claim 26, wherein V3 is 0.65-0.71V.
28. The method as claimed in claim 1, wherein the final voltage V3 in step (3) varies by 2mV or less as: and in 15-20 min, the final voltage V3 variation amplitude is less than or equal to 2 mV.
29. The method according to one of claims 1 to 28, characterized in that the method comprises the steps of:
(1) setting the temperature of a cooling water inlet of the fuel cell to be 60-70 ℃, respectively introducing fuel gas and air with the humidity of 80-95% to an anode and a cathode of the fuel cell, wherein the stoichiometric ratio of the introduced fuel gas is 1.5-1.8, and the stoichiometric ratio of the air is 2.0-2.2, and carrying out a discharging process from the initial current density of 0-0.4A/cm2Increasing the current density in a stepwise manner to a final current density of 1.6-1.8A/cm2Each step of increasing a current density, working for 3-5 min at the working current density after increasing the current density, wherein the process is an operation period, and the step increase of the current density is 0.3-0.6A/cm2Repeating the operation for 3-6 cycles until the final voltage V1 is less than or equal to 2mV after 15-20 min, and completing activation;
(2) in the operation process of the step (1), if the voltage value of the single chip under the corresponding current density is smaller than the normal voltage value under the current density, the step (1) is suspended, and the current density is adjusted to be the activated current density of 0.5-0.8A/cm2The cathode has the air inlet pressure of 70-100 kPa, the anode has the air inlet pressure of 90-120 kPa, constant current discharge is carried out for 2.5-3.5 h under the activation current density until the final voltage V2 is reached, and the change amplitude is less than or equal to 2mV within 15-20 min, so that activation is completed;
(3) in the operation process of the step (2), if the voltage value of the single chip corresponding to the activation current density is smaller than the normal voltage value under the current density, the step (2) is suspended, the activation current density is increased in a step-by-step manner, and the step-by-step increase is carried outThe length of the film is 0.1-0.2A/cm2And discharging for 2.5-3.5 h at constant current under each increased activation current density until the final voltage V3 reaches the final voltage V3, wherein the change amplitude is less than or equal to 2mV in 15-20 min, and completing activation.
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| CN111740134B (en) * | 2020-05-19 | 2021-06-18 | 广东国鸿氢能科技有限公司 | Method for activating electric pile of fuel cell |
| CN113097539B (en) * | 2021-04-13 | 2022-04-15 | 金华氢途科技有限公司 | Fuel cell recovery method |
| CN113224353B (en) * | 2021-05-08 | 2022-07-22 | 张家口市氢能科技有限公司 | Quick activation method and device for hydrogen fuel cell |
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