CN112670537B - Quick activation method for metal bipolar plate pile of proton exchange membrane fuel cell - Google Patents
Quick activation method for metal bipolar plate pile of proton exchange membrane fuel cell Download PDFInfo
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Abstract
The invention discloses a rapid activation method of a proton exchange membrane fuel cell metal bipolar plate stack, which comprises the following steps: under a certain condition, carrying out rapid working condition activation of a polarization curve, then carrying out steady-state activation of a high-density gradient, taking the activation as an activation period, and finally carrying out intermittent cycle activation; polarization curve quick-sweep operating mode activation process: the proton exchange membrane is quickly wetted in a short time by adopting a once forced variable load activation process, and the voltage is changed from high to high in the gradient loading and quick load reduction processes, which is equivalent to a once quick potential scanning, so that the catalyst is subjected to a once oxidation-reduction process in a short time; high electric density gradient steady-state activation process: the method further improves the activation efficiency, greatly shortens the activation time and the cost, and has important significance for the large-scale production of the proton exchange membrane fuel cell stack.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a rapid activation method of a metal bipolar plate stack of a proton exchange membrane fuel cell.
Background
Proton Exchange Membrane Fuel Cells (PEMFCs) are important research and development in recent years at home and abroad due to the characteristics of low operating temperature, fast start, high power density, no exhaust emission and the like. In the development of PEMFC, many factors must be considered, and activation of PEMFC is a decisive factor for realizing commercial application thereof. The PEMFC can greatly improve the performance through the activation energy, achieves a stable state, and can detect whether the fuel cell has the delivery requirement or not, so that the quality of products is ensured.
The core component of the PEMFC is a Membrane Electrode (MEA), the component of the membrane electrode comprises an electrocatalyst, a proton exchange membrane, a gas diffusion layer and the like, and the activation essence of the PEMFC is the activation of the MEA, namely the performance of the MEA is improved, including the electrocatalytic activity, the utilization rate of the catalyst and the like. Usually, after a new PEMFC stack or module is assembled, it is often required to be fully activated to be normally put into use in order to achieve (or quickly achieve) its optimal state and operation performance. The activation process of the PEMFC generally requires several hours or even days, so that a large amount of resources such as hydrogen, nitrogen and the like are consumed, and the production cycle of the PEMFC is delayed.
The activation processes of the PEMFC are various, and can be classified into: PEMFC pretreatment activation (before discharge), PEMFC in-situ activation (just after discharge), PEMFC restorative activation (after a period of discharge), and the like. In the existing activation process, mainly in-situ activation is adopted, namely, after the PEMFC is assembled to before formal use, an activation method for improving the performance of the PEMFC in a discharging mode is adopted, and the activation method is determined by a current loading mode and test conditions. The loading mode of the current can be divided into constant current and variable current; the test conditions can be divided into constant parameter tests and variable parameter tests; the whole activation process can be divided into continuous activation and batch activation.
The prior art discloses a method for activating a fuel cell stack (application number is 110416556A), and the technical scheme is that the electrode surface is used for quickly forming a high potential for a period of time in the primary pre-wetting activation and the secondary pre-wetting activation processes of the stack, so that unstable catalysts on the electrode surface and impurities on the oxidized electrode surface are eliminated; then through the humidification and activation process of variable current, the operation is carried out under high current density, so that the water generated by the reaction rapidly humidifies the membrane electrode, and the rapid humidification of the proton exchange membrane and the catalytic layer resin is realized; the electric pile is controlled to run at the intersection of high and low current density, so that the electrode forms stable gas and electron transmission channels rapidly, the acceleration activation of the fuel cell electric pile is realized, and the activation time can be controlled to be about 2 hours. However, although the method can eliminate surface impurities of the catalyst to a certain extent, the continuous high potential can cause corrosion of the carbon carrier, and the service life of the battery is influenced.
In addition, the prior art also discloses an activation method of the fuel cell stack, which comprises the steps of firstly introducing hydrogen to the anode of the stack to be activated, introducing air or oxygen to the cathode of the stack to be activated, and enabling the stack to be in an open circuit state; then carrying out intermittent anoxic treatment on the cell stack, namely carrying out reduction operation after the cell stack is in an oxygen starvation state; and finally, constant-current discharge activation is carried out, the cell stack is loaded to a set current, and intermittent anoxic treatment is carried out on the cell stack after the cell stack is in a stable working state. The method adopts an intermittent anoxic activation method of the electric pile, which can cause the risk of large voltage fluctuation of the electric pile and even low transient state, and has certain safety problem.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses a rapid activation method of a proton exchange membrane fuel cell metal bipolar plate stack, which is mainly applied to the activation process of a Proton Exchange Membrane Fuel Cell (PEMFC), and specifically comprises the following steps:
under a certain condition, carrying out rapid working condition activation of a polarization curve, then carrying out steady-state activation of a high-density gradient, taking the activation as an activation period, and finally carrying out intermittent cycle activation;
polarization curve quick-sweep operating mode activation process: the proton exchange membrane is quickly wetted in a short time by adopting a once forced variable-load activation process, and the potential is changed from high to low to high in the gradient loading and quick load reduction processes, which is equivalent to a once quick potential scanning, so that the catalyst has a once oxidation-reduction process in a short time;
high electric density gradient steady-state activation process: the mass transfer channel inside the battery is further opened by adopting constant current activation with high electric density, so that three interfaces of a catalytic layer are constructed to promote electrochemical reaction, and the water balance state inside the battery can be effectively adjusted by properly reducing the air humidity during high electric density operation;
intermittent cyclic activation process: and stopping the reactor for a certain time after the high-density gradient steady-state activation process is completed, and returning to the polarization curve fast-sweeping working condition activation process to perform intermittent cycle operation to complete the activation process of the reactor.
Further, three-cavity air tightness detection is carried out on the assembled electric pile, wherein the three-cavity air tightness detection comprises three-cavity leakage, hydrogen single-cavity pressure maintaining, oxyhydrogen cavity mutual stringing and oxyhydrogen cavity stringing air tightness test;
performing electrochemical leakage test on the electric pile, introducing air to the cathode of the battery, introducing hydrogen to the anode of the battery, closing a hydrogen tail discharge valve when the hydrogen pressure reaches a set value, continuously adjusting the hydrogen pressure to a set threshold value, stopping air inlet when the total voltage of the electric pile is not increased any more, observing the change condition of single-section voltage of the electric pile, and judging whether each battery is qualified in leakage test;
and (3) performing a polarization curve quick-sweep working condition activation process: setting initial values of battery temperature, gas humidity, air metering ratio, loading rate and air and hydrogen stacking pressure, and stably operating at the initial electric density point for a set time; maintaining the temperature, the gas humidity and the loading rate of the battery unchanged, setting an air metering ratio, sequentially increasing the pressure of air and hydrogen in a stack, and stably operating for a set time at the increased electric density point; loading to three different electric density points at the same loading speed, keeping constant metering ratio and pressure of hydrogen and air in-pile gas, and respectively operating stably at the three electric density points for a set time; and finally, the density is reduced to 0 rapidly at a certain load reduction rate, and the air inlet is stopped and kept for a certain time.
Further, the high-density gradient steady-state activation process is as follows: setting the temperature, the air humidity and the air metering ratio value of a galvanic pile, setting hydrogen as a reflux humidifying mode, and arranging a pulse row as a tail row mode;
gradually loading to a set threshold value at a certain loading rate, adjusting the air and hydrogen stacking pressure to be set values A respectively, and stably operating at the electric density point for a certain time;
continuously increasing the loading rate to a higher electric density point, adjusting the air and hydrogen stacking pressure to be respectively kept at a set value A, and stably operating at the electric density point for a certain time;
and finally, the current density is quickly reduced to 0 at the set load reduction rate, and the load switch is closed, so that the air inlet and water circulation are stopped and the machine is stopped.
Due to the adoption of the technical scheme, the method for quickly activating the proton exchange membrane fuel cell metal bipolar plate galvanic pile is provided, the fast activation of the galvanic pile is realized by combining the intermittent circulating activation method with high-density steady-state operation through the fast scanning working condition of the polarization curve, and the method is not only suitable for short galvanic piles, but also suitable for high-power galvanic piles, and has strong practicability; the polarization curve quick-sweeping working condition activation can be used as an effective forced load-changing activation process, can be used as a judgment basis for the activation state of the fuel cell stack, can be realized by using a manual loading method, can be finished by adopting program setting, and is convenient to operate; the stack loading activation process uses high-voltage operation conditions, and the activation humidification conditions of the first polarization curve quick-sweeping working condition are distinguished from the humidification conditions of the following same steps, so that the adjustment of water balance is facilitated; finally, the PEMFC rapid activation process provided by the method improves the activation efficiency, greatly shortens the activation time and the activation cost, and has important significance for the large-scale production of proton exchange membrane fuel cell stacks.
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 these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph of polarization curve fast-sweep performance (I-V) and high frequency impedance (HFR) during activation in example 1.
FIG. 2 (a) and FIG. 2 (b) are respectively the low electric density points (150 mA cm) of example 1 during activation -2 ) And high electric density (1600 mA cm) -2 ) Alternating current impedance (EIS) diagram.
FIG. 3 is a graph comparing polarization curve fast-sweep performance (I-V) during activation for example 2.
Fig. 4 is a graph of the power change during steady state activation for example 2.
FIG. 5 is a graph showing the comparison of the performance of comparative example 1 and example 1 before and after activation.
FIG. 6 is a graph comparing the performance of comparative example 2 with that of example 1 before and after activation.
FIG. 7 is a graph showing the performance of comparative example 3 before and after activation with example 1.
Detailed Description
In order to make the technical scheme and advantages of the present invention more clear, the technical scheme in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:
the invention discloses a method for quickly activating a proton exchange membrane fuel cell metal bipolar plate stack, which is respectively verified by experiments on stacks with different power levels and comprises the steps of detecting each voltage of a cell by a fuel cell test platform and a voltage inspection system, quickly activating a working condition of a polarization curve under a certain condition, then activating a high-density gradient steady state, taking the activation as an activation period, and then carrying out intermittent cyclic activation, wherein the specific technical scheme is as follows:
s1, polarization curve quick-scanning working condition activation
S11, the proton exchange membrane can be quickly wetted in the shortest time through a one-time quick forced load-changing activation process, so that the proton conduction capacity of the proton exchange membrane is improved; the used high-pressure and high-humidity test conditions are conducive to the establishment of a gas-liquid transmission channel in the battery; in the gradient loading and rapid load reduction processes, the catalyst undergoes a redox process in a short time, which is beneficial to the removal of impurities on the surface of the catalyst.
S12, the activation process can be used as an effective activation process and can also be used as a criterion of the activation state of the fuel cell stack. The polarization curve quick-scanning working condition activation can be realized by using a manual loading method, and the polarization curve quick-scanning working condition activation can also be finished by adopting program setting, so that the operation is convenient.
S2, high-density steady-state activation
The mass transfer channel inside the battery is further opened through constant current activation with high electric density, three interfaces of the catalytic layer are effectively constructed, and the utilization rate of the catalyst is improved, so that the electrochemical reaction is promoted. Since the cathode water yield of the battery itself is large during high-density operation, it is necessary to properly reduce the air humidity to adjust the water balance state inside the battery.
S3, intermittent cyclic activation
The steps S1 and S2 are combined to be used as a complete activation process, and shutdown operation is carried out after each cycle of activation, so that the main purpose is to enable the battery to carry out self-internal water balance adjustment.
Example 1 a newly assembled 15-section metal plate bipolar plate stack was rapidly activated as follows:
(1) Accurately connecting the assembled pile with an air tightness detection device, and performing three-cavity air tightness detection, wherein the three-cavity air tightness detection comprises three-cavity leakage, hydrogen single-cavity pressure maintaining, oxyhydrogen cavity mutual stringing, oxyhydrogen cavity stringing and other air tightness tests;
(2) And after the air tightness detection is qualified, accurately connecting the fuel cell to a test platform, connecting pipes and circuits comprising water, gas, electricity, temperature and humidity sensors and the like, and then performing electrochemical leakage test on the electric pile. Specifically, the air metering ratio is set to be 2.5 and is 100mA cm -2 The required air quantity is introduced into the cathode of the battery, and the air tail discharge mode is a normal discharge mode; and (3) regulating a hydrogen proportional valve, introducing hydrogen into the anode of the battery, closing a hydrogen tail discharge valve when the hydrogen pressure reaches 10-20 kPa, continuously regulating the hydrogen pressure to 50+/-2 kPa, stopping air inlet when the total voltage of the electric pile is not increased, starting timing for 1min, and observing the change condition of single-section voltage of the electric pile.
Leak test standard: if the single-section voltage is kept above 500mV within 1min, the battery is qualified in leakage test; if the voltage of a single section falls below 500mV within 1min, the battery is failed to test leakage.
After the leak test is finished, the hydrogen tail discharge valve is opened, the hydrogen pressure is regulated to be 0kPa, and the air is stopped.
(3) And (3) activating a polarization curve under a quick-scanning working condition: after the electric pile leak test is qualified, various parameters are set according to the test condition 1, and the battery temperature isThe air is humidified at 75 ℃ by 100%, the hydrogen is humidified in a backflow way, the tail discharge method is pulse discharge, and the electric pile is operated according to the working condition 1. Firstly, the air metering ratio is set to be 2.6, and 20mA cm -2 The loading rate of/s was gradually increased to 200mA cm -2 Then regulating the pressure of air and hydrogen to be 40kPa and 60kPa respectively, and stably operating at the electric density point for 1min; the air metering ratio was set to 2.2 at 20mA cm -2 The loading rate of/s was gradually increased to 400mA cm -2 Then the air and hydrogen gas are regulated to be respectively 80kPa and 100kPa, and the reactor is stably operated at the electric density point for 1min; setting the air metering ratio to be 2 and 20mA cm -2 The loading rate of/s was gradually increased to 600mA cm -2 Then the air and hydrogen gas are regulated to be respectively 110kPa and 130kPa, and the reactor is stably operated at the electric density point for 1min; setting the air metering ratio to be 2 and 20mA cm -2 The loading rate of/s was gradually increased to 800mA cm -2 Then the pressure of air and hydrogen which enter the reactor is respectively 125kPa and 145kPa, and the reactor is stably operated at the electric density point for 1min; setting the air metering ratio to be 2 and 20mA cm -2 The loading rate of/s is gradually increased to 1000mA cm -2 Then the air and hydrogen gas are regulated to be respectively 150kPa and 170kPa, and the reactor is stably operated at the electric density point for 1min; continue to load to 1200mA cm at the same load rate -2 /s，1400mA cm -2 /s，1600mA cm -2 The metering ratio and the pressure of the hydrogen and air in-pile gas are kept unchanged at the electric density points, and the hydrogen and air in-pile gas stably run for 1min at the three electric density points respectively; then at 50mA cm -2 The load-reducing speed per second is reduced to 0, the air inlet is stopped, and the air inlet is kept for 1-3 min.
(4) High-density steady-state activation is performed: after the operation in the step 3, the operating condition II of the electric pile is as follows: the temperature of the galvanic pile is set to be 75 ℃, the air humidity is 30% -40% for humidification, the air metering ratio is 2, the hydrogen adopts a reflux humidification mode, and the tail discharge method is pulse discharge. At 20mA cm -2 The loading rate of/s was gradually increased to 1400mA cm -2 Then the air and hydrogen gas are regulated to be respectively 150kPa and 170kPa, and the reactor is stably operated at the electric density point for 10 minutes; then take 20mA cm -2 The loading rate of/s is gradually loaded to a higher electrical density point 1600mA cm -2 Regulating the pressure of air and hydrogen to be respectively kept at 150kPa and 170kPa, and stably operating at the electric density point for 5min; then at 50mA cm -2 The load-reducing rate of/s makes the current density quickly reduced to 0, and the load switch is closed, the air inlet and water circulation are stopped, and the machine is stopped for 10-15 min.
(5) Intermittent cyclic activation: and (3) combining the activation steps (2) and (3) as 1 complete activation process, stopping operation is carried out after each cycle of activation, stopping time is about 10-15 min, and the process is repeated for 2 times of intermittent cycle operation, so that the activation of the galvanic pile is completed.
(6) Activation process performance test: monitoring the high frequency impedance (HFR) of the pile activation operation in real time, and after each cycle activation, measuring 150mA cm -2 And 1400mA cm -2 And the point is used for testing the full-frequency alternating current impedance of the electric pile.
(7) In this embodiment, the performance of the fast working conditions of the polarization curve comparing the initial state of the electric pile and the activation process is shown in fig. 1, and it can be seen from the graph that, compared with the initial state of the electric pile, the performance of the electric pile after the 1 st activation is significantly improved, and this step is mainly due to the fast wetting of the proton exchange membrane and the hydration of the polymers in the electrode diffusion layer and the catalytic layer, so that the proton conductivity of the electric pile is rapidly improved, and the electric pile performance is greatly improved; after the activation for the 2 nd time, the performance of the galvanic pile is further improved, especially the performance in a mass transfer polarization control area is obviously improved, and the process is probably due to the fact that after gas is pressurized, gas and liquid transmission channels in the electrode are further opened, impurities in a flow field are removed, the formation of a gas-liquid-solid three-phase reaction interface is promoted, and therefore the performance of the fuel cell is effectively and stably improved.
(8) In this example, the initial state of the cell stack and the ac impedance after activation are compared, as shown in fig. 2, from which it can be obtained that after the 1 st activation of the cell stack, the cell stack is activated at a low density point (150 mA cm -2 ) The ohmic resistance and the activation resistance of the catalyst are obviously reduced, and the ohmic resistance is further reduced after the 2 nd activation, so that the ohmic resistance of the catalyst is gradually reduced, and the activity and the utilization rate of the catalyst are greatly improved along with the activation; at a high electrical density point (1600 mA cm) -2 ) The impedance change of the electric pile mainly reflects the mass transfer performance of the electric pile, and the mass transfer impedance of the electric pile is increased and then reduced, so that the adjustment of the humidification condition of the electric pile in the activation process in time is beneficial to the management of water balance, and the mass transfer impedance is reduced.
(9) In this example, the performance of the stack after the 2 nd activation was almost unchanged from the average voltage after the 3 rd activation, and it was confirmed that the activation of the stack was completed by performing the first 2 times of activation, and the activation time was shortened to about 1 hour. As can be seen from Table 1, example 1 has the shortest activation time and the least hydrogen consumption, and significantly improves the activation efficiency and reduces the activation cost.
Table 1 is a comparative table of the activation time and hydrogen consumption of example 1 and comparative examples 1, 2, 3.
Example 2
(1) A newly assembled 370-section high-power metal bipolar plate pile is quickly activated, and the activation working condition process is identical to that of the embodiment 1.
(2) The present invention was applied to 370-section high power stack activation using the same activation process and conditions as in example 1, and the results are shown in fig. 3 and 4. Compared with the initial state of the pile, the polarization performance of the pile after the 1 st activation is obviously improved, the performance after the 2 nd activation is increased by less than 10mV relative to the performance voltage after the 1 st activation, which indicates that the 370-section high-power metal bipolar plate pile is basically activated after only 1 activation by using the activation method of the invention.
(3) The test result of the embodiment 2 shows that the invention is not only suitable for short stacks, but also suitable for high-power stacks, has stronger practicability and operability, shortens the quick time of 370 sections of high-power metal bipolar plate stacks to be within 1h, greatly improves the resource utilization rate and saves the activation cost.
Comparative example 1
Comparative example 1 and examplesExample 1 differs in that step (3) in example 1 was not performed, and no high-density steady-state activation process was performed, only medium density (800 mA cm -2 ) Is activated in a cyclic intermittent steady state.
In this embodiment, the stack is activated 5 times according to the operation conditions, the performance of the stack after each activation of the first 4 times of activation is increased to a certain extent, and the performance of the polarization curve before and after the activation of the stack after the 5 th activation is compared with that of embodiment 1, as shown in fig. 5. As can be seen from the graph, even though comparative example 1 was activated 5 times, the activation performance was still not at the highest output by using about 3 times of the activation time and 2 times of the hydrogen consumption amount relative to example 1, indicating that the activation efficiency of the cell stack was the lowest without the activation steps of (3) and (4) in example 1.
Since the present embodiment does not have an activation step for the fast-scan condition of the polarization curve, there is no detection data of the activation process.
Comparative example 2
Comparative example 2 differs from example 1 in that the high-density steady-state activation process in example 1 was not performed, and only medium density (800 mA cm -2 ) Is activated in steady state.
This example performed 4 total activations of the stack according to the operating conditions, the results of which are shown in fig. 6. From the graph, the performance of the electric pile after the 1 st activation is obviously increased, the performance of the electric pile after the 2 nd activation is mainly improved to a certain extent in a medium-high electric density region, but the performance of the electric pile after the 3 rd activation is almost unchanged, and the performance of the electric pile is slightly reduced after the 4 th activation. And the polarization curve performance before and after activation was still slightly worse compared to example 1. The high density activation process of step (4) in example 1 proved to be critical to the activation effect of the cell stack.
Comparative example 3
Comparative example 3 differs from example 1 in that step (3) in example 1 is not performed.
This example performed 4 total activations of the stack according to the operating conditions, and the results are shown in fig. 7. From the graph, if only high-density steady-state circulation activation is performed, the final performance of the electric pile in the mass transfer polarization control area with high density is lower than that of the embodiment 1, which proves that the continuous high-density activation can affect the mass transfer performance of the electric pile, and the hydrogen consumption of the embodiment is far greater than that of the embodiment 1. The polarization curve fast-sweep operation activation process of step (3) in example 1 proves to be critical to the activation effect of the galvanic pile.
According to the analysis of the embodiment, the performance of the battery is better in the embodiment within about 1.5-3 times of time, the air consumption in the whole activation process is greatly reduced, the activation efficiency is obviously improved by about 1/2 of that of the comparative example, the activation time is further shortened, and the activation cost is reduced.
In addition, the polarization curve quick-scanning working condition activation adopted by the invention is an activation process, and can also be used as a judgment basis of the state of the electric pile activation process, so that the performance change rule of the electric pile from the initial state to the activation completion can be more clearly recognized, and the further understanding of the activation mechanism is facilitated.
Finally, the invention is not only suitable for short stacks, but also suitable for high-power stacks, has stronger practicability and operability, shortens the activation time of 370 sections of high-power metal bipolar plate stacks to be within 1h, greatly improves the resource utilization rate and saves the activation cost.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A method for rapid activation of a proton exchange membrane fuel cell metal bipolar plate stack, comprising: under a certain condition, carrying out rapid working condition activation of a polarization curve, then carrying out steady-state activation of a high-density gradient, taking the activation as an activation period, and finally carrying out intermittent cycle activation;
polarization curve quick-sweep operating mode activation process: the proton exchange membrane is quickly wetted in a short time by adopting a once forced variable load activation process, and the potential is set to be a process from high to low to high in the gradient loading and quick load reduction processes, so that a catalyst is subjected to a once oxidation-reduction process in a short time;
high electric density gradient steady-state activation process: the mass transfer channel inside the battery is further opened by adopting constant current activation with high electric density, so that three interfaces of a catalytic layer are constructed to promote electrochemical reaction, and the water balance state inside the air humidity regulating battery in high electric density operation is reduced;
intermittent cyclic activation process: and stopping the reactor for a certain time after the high-density gradient steady-state activation process is completed, and returning to the polarization curve fast-sweeping working condition activation process to perform intermittent cycle operation to complete the activation process of the reactor.
2. The method of claim 1, further characterized by: the polarization curve quick-sweeping working condition activation process comprises the following steps:
three-cavity air tightness detection is carried out on the assembled electric pile, wherein the three-cavity air tightness detection comprises three-cavity leakage, hydrogen single-cavity pressure maintaining, oxyhydrogen cavity mutual stringing and oxyhydrogen cavity stringing cavity air tightness test;
performing electrochemical leakage test on the electric pile, introducing air to the cathode of the battery, introducing hydrogen to the anode of the battery, closing a hydrogen tail discharge valve when the hydrogen pressure reaches a set value, continuously adjusting the hydrogen pressure to a set threshold value, stopping air inlet when the total voltage of the electric pile is not increased any more, observing the change condition of single-section voltage of the electric pile, and judging whether each battery is qualified in leakage test;
and (3) performing a polarization curve quick-sweep working condition activation process: setting initial values of battery temperature, gas humidity, air metering ratio, loading rate, air and hydrogen stacking pressure, and stably operating at the initial electric density point for a set time; maintaining the temperature, the gas humidity and the loading rate of the battery unchanged, setting an air metering ratio, sequentially increasing the pressure of air and hydrogen in a stack, and stably operating for a set time at the increased electric density point; loading to three different electric density points at the same loading speed, keeping constant metering ratio and pressure of hydrogen and air in-pile gas, and respectively operating stably at the three electric density points for a set time; and finally, the density is reduced to 0 rapidly at a certain load reduction rate, and the air inlet is stopped and kept for a certain time.
3. The method of claim 1, further characterized by: the high-density gradient steady-state activation process comprises the following steps: setting the temperature, the air humidity and the air metering ratio value of a galvanic pile, setting hydrogen as a reflux humidifying mode, and arranging a pulse row as a tail row mode;
gradually loading to a set threshold value at a certain loading rate, adjusting the air and hydrogen stacking pressure to be set values A respectively, and stably operating at the electric density point for a certain time;
continuously increasing the loading rate to a higher electric density point, adjusting the air and hydrogen stacking pressure to be respectively kept at a set value A, and stably operating at the electric density point for a certain time;
and finally, the current density is quickly reduced to 0 at the set load reduction rate, and the load switch is closed, so that the air inlet and water circulation are stopped and the machine is stopped.
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| CN113258102B (en) * | 2021-06-17 | 2021-12-21 | 潍柴动力股份有限公司 | Cell stack activation method and device and storage medium |
| CN114024001B (en) * | 2022-01-05 | 2022-11-08 | 佛山市清极能源科技有限公司 | Cathode activation method of proton exchange membrane fuel cell stack |
| CN114024000B (en) * | 2022-01-05 | 2022-11-08 | 佛山市清极能源科技有限公司 | Anode activation method of proton exchange membrane fuel cell stack |
| CN114597450A (en) * | 2022-03-09 | 2022-06-07 | 大同氢雄云鼎氢能科技有限公司 | Rapid activation method of fuel cell system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752582A (en) * | 2010-01-04 | 2010-06-23 | 新源动力股份有限公司 | Method for activating fuel cell stack rapidly |
| CN105552405A (en) * | 2016-01-28 | 2016-05-04 | 新源动力股份有限公司 | Method for improving activation efficiency of fuel cell |
| CN110416556A (en) * | 2019-07-05 | 2019-11-05 | 上海骥翀氢能科技有限公司 | A kind of method of fuel cell pile activation |
| CN111525156A (en) * | 2020-04-30 | 2020-08-11 | 无锡威孚高科技集团股份有限公司 | Activation method of proton exchange membrane fuel cell stack |
-
2020
- 2020-12-24 CN CN202011552103.0A patent/CN112670537B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752582A (en) * | 2010-01-04 | 2010-06-23 | 新源动力股份有限公司 | Method for activating fuel cell stack rapidly |
| CN105552405A (en) * | 2016-01-28 | 2016-05-04 | 新源动力股份有限公司 | Method for improving activation efficiency of fuel cell |
| CN110416556A (en) * | 2019-07-05 | 2019-11-05 | 上海骥翀氢能科技有限公司 | A kind of method of fuel cell pile activation |
| CN111525156A (en) * | 2020-04-30 | 2020-08-11 | 无锡威孚高科技集团股份有限公司 | Activation method of proton exchange membrane fuel cell stack |
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