CN112952151A - Method for activating fuel cell stack - Google Patents

Method for activating fuel cell stack Download PDF

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CN112952151A
CN112952151A CN202110134179.XA CN202110134179A CN112952151A CN 112952151 A CN112952151 A CN 112952151A CN 202110134179 A CN202110134179 A CN 202110134179A CN 112952151 A CN112952151 A CN 112952151A
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activation
fuel cell
load
gas
stack
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汤千秋
甘全全
戴威
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Shanghai Shenli Technology Co Ltd
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Shanghai Shen Li High Tech Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • H01M8/04126—Humidifying
    • 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
    • H01M8/04225—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 during start-up
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The invention relates to a method for activating a fuel cell stack, which is characterized in that after a membrane electrode is used for assembling the stack, humidification gas is firstly used for humidifying the membrane electrode in the primary activation process, and then the stack is subjected to load-pulling activation. Compared with the prior art, the invention has no harsh operating conditions, can avoid the damage to the membrane electrode and reduce the hydrogen-air serial leakage ratio of the membrane electrode.

Description

Method for activating fuel cell stack
Technical Field
The invention relates to the technical field of fuel cells, in particular to a method for activating a fuel cell stack.
Background
A fuel cell is an energy conversion device capable of further converting chemical energy stored in a fuel and an oxidant into direct current electrical energy by an electrochemical means. The electrochemical redox reaction realizes the migration of electrons on the cathode and the anode through an external circuit. However, similar in form to diesel generators, it is necessary to continuously supply fuel and air, discharge exhaust gas and waste water, and output electric power.
The performance of a fuel cell depends to a large extent on the performance of a Membrane Electrode Assembly (MEA) or a CCM (Catalyst-coated Membrane), the performance of the components of the MEA (such as an electrocatalyst, a proton exchange Membrane, a gas diffusion layer, etc.) or the CCM (such as an electrocatalyst, a proton exchange Membrane), and the inherent performance of the MEA or the CCM, which are inherently affected by the preparation process of the MEA or the CCM. Therefore, newly produced fuel cells typically require activation to achieve their optimal performance.
Various activation methods of fuel cells have been proposed and studied, such as current control, voltage control, a method of hydrogen pump, a method of CO oxidation stripping, and an electrochemical method of membrane electrode, etc. However, these methods have been mainly demonstrated in monolithic stacks or small power (e.g. less than 1kw) stacks, but there are very few reports of activation methods and processes for larger power stacks in industrial applications.
The invention patent CN102097631B proposes a set of five-channel theory suitable for proton exchange membrane fuel cells, namely five inlet and outlet channels of water, heat, gas, proton and electron, and based on the theory, provides an activation method of a membrane electrode, and deionized water is continuously introduced into a gas flow channel to fully wet the membrane electrode; an optimal range can be obtained between reduction of ohmic polarization and concentration polarization by adjusting a stack clamp; after reaction gas is introduced, the battery outputs current according to preset step gradient by adjusting the load, so that the interiors of five transmission channels of water, heat, electrons, protons and gas can be adjusted, more catalysts become effective reaction points, and the activation effect is better.
It should be noted that some methods of activating the stack under severe conditions, such as high-temperature treatment in boiling water or steam before stacking the MEA, or CO oxidation stripping, do not meet the safety requirements of industrial production. In addition, the reported activation method has the defects of complex process, long activation time, large hydrogen consumption and the like. Therefore, in industrial production, the development of a galvanic pile activation method with short activation time, simple process, mild conditions and low hydrogen consumption is urgently needed.
According to the method provided by the invention patent CN102097631B, the MEA is wetted by deionized water after stacking, so that on one hand, the distribution of the deionized water in the galvanic pile is difficult to control, each MEA cannot be fully wetted, the wetting time is long, and the effect is poor; in addition, a large amount of liquid water may remain in the electric pile due to the direct deionized wetting, which increases the difficulty of load pulling in the subsequent activation process, such as constant current activation, and even causes flooding of the electric pile during the activation and subsequent normal operation, thereby causing reverse polarity. And the thickness change is caused by the MEA wetting, the electric pile clamp needs to be further adjusted subsequently, and the activation process is complicated.
Disclosure of Invention
The aim of the invention is to provide a method for activating a fuel cell stack which is simple and avoids the introduction of excessive liquid water into the stack.
The purpose of the invention can be realized by the following technical scheme: a method for activating fuel cell stack includes such steps as using the humidified gas to humidify the membrane electrode and pull-loading activation of stack in the primary activation procedure after the stack is assembled by membrane electrode.
Furthermore, in the process of humidifying the membrane electrode by the humidified gas, an internal resistance tester is used for monitoring the internal resistance of the galvanic pile.
The relative humidity of the humidified gas is 20-100%, the gas temperature is 20-80 ℃, and the humidifying time is 1-30 min.
The humidifying gas comprises nitrogen, helium, hydrogen or air, the relative humidity is 50-100%, and the temperature is 20-75 ℃.
Preferably, the temperature is 20-40 ℃.
The humidifying process comprises the following steps: humidifying gas is introduced into both the anode and the cathode of the galvanic pile, and the current density is 200-420 mA-cm in the process of introducing the humidifying gas-2。
The pulling load activation speed is 0.1-10A/s, and the current is balanced for 0.5-10 min after each pulling load is 10-100A.
Further, stopping pulling and loading when the pulling and loading reaches 140A, and continuing to stabilize for 5-30 min.
After the pull-loading activation, the activation is further performed by using a current control activation method, a voltage control activation method or a hydrogen pump activation method.
Further, the current control activation method comprises the following steps: controlling the fuel cell current to increase or decrease to activate the stack;
the voltage control activation method comprises the following steps: controlling the fuel cell voltage to increase or decrease to activate the stack;
the activation method of the hydrogen pump comprises the following steps: humidified hydrogen and nitrogen are respectively introduced into two sides of the fuel cell, and current is applied for charging to promote the membrane electrode to recover the proton passing capability.
Compared with the prior art, the invention has the following advantages:
1. the method has no harsh operating conditions, and is suitable for activating the industrial medium-high power galvanic pile;
2. according to the invention, after stacking, humidification gas is used for wetting the membrane electrode, so that excessive liquid water can be prevented from being introduced into the galvanic pile, and the membrane electrode is prevented from being damaged;
3. in the humidifying process by using the humidifying gas, the internal resistance of the galvanic pile is monitored by using the internal resistance tester so as to judge whether the proton exchange membrane is fully wetted, when the internal resistance of the galvanic pile decreases gradually until the internal resistance does not change basically, the proton exchange membrane is fully wetted, the humidification of the humidifying gas can be stopped, the humidification degree of the proton exchange membrane can be judged by monitoring by using the internal resistance tester, the humidification time does not need to be excessively prolonged while the full humidification of the proton exchange membrane is ensured, and the activation efficiency is improved;
4. the invention uses the humidifying gas to wet the galvanic pile, reduces the load pulling speed in the first load pulling process, and greatly reduces the hydrogen empty serial leakage ratio of the membrane electrode caused by activation.
Drawings
FIG. 1 is a schematic view showing the change of current in the pull-load activation process in example 1.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.
Example 1
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode. In the primary activation process, humidification gas is used for humidifying MEA, and then low loading speed pulling load is adopted for activation. The humidifying gas can be nitrogen, helium, hydrogen, air and the like, and is preferably nitrogen in consideration of cost and the like, and the humidifying time is 1-30 min. The humidity of the humidified gas is preferably 50 to 100%, and the temperature is preferably 20 to 75 ℃, more preferably 20 to 40 ℃.
During the humidifying process by using the humidifying gas, the internal resistance of the galvanic pile can be monitored by using an internal resistance instrument so as to presume whether the proton exchange membrane is fully wetted, when the internal resistance of the galvanic pile is reduced gradually until the internal resistance is basically not changed, the proton exchange membrane is fully wetted, and the humidifying of the humidifying gas can be stopped.
After the MEA is wetted by the humidifying gas, the stack is subjected to load-pulling activation by a low load-pulling speed method for the first load pulling, the load-pulling speed is preferably 0.1-10A/s, and after 10-100A of load pulling, the current is balanced for 0.5-10 min to further reduce the load-pulling speed, and finally the load pulling is finished to 140A. As shown in FIG. 1, the load pull rate is 0.5A/s, and the current is balanced for 2min for each 20A load.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at the lower part of the reactor was increased from 0.58V to 0.65V (the operating conditions were 65 ℃ C., the gas metering ratio of the anode to the cathode was 1.4/2.0, the gas humidification ratio of the anode and the cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and the cathode were 60/50kPa, respectively). The performance is obviously improved. And for the pile of 200 single cells, the hydrogen and empty string leakage before and after activation are not obviously improved, which shows that the activation method has no influence on the hydrogen empty string leakage of the MEA.
Example 2
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode. In the primary activation process, humidification gas is used for humidifying the MEA, and then low-loading-speed pulling load is carried out for activation. The humidifying gas can be nitrogen, helium, hydrogen, air and the like, and is preferably nitrogen in consideration of cost and the like, and the humidifying time is 1-30 min. The humidity of the humidified gas is preferably 50 to 100%, the temperature is preferably 20 to 75 ℃, and the temperature is preferably 20 to 40 ℃.
During the humidifying process by using the humidifying gas, the internal resistance of the galvanic pile can be monitored by using an internal resistance instrument so as to presume whether the proton exchange membrane is fully wetted, when the internal resistance of the galvanic pile is reduced gradually until the internal resistance is basically not changed, the proton exchange membrane is fully wetted, and the humidifying of the humidifying gas can be stopped.
After the MEA is wetted by the humidifying gas, the stack is subjected to load-pulling activation by a low load-pulling speed method for the first load pulling, the load-pulling speed is preferably 0.1-10A/s, and after 10-100A of load pulling, the current is balanced for 0.5-10 min to further reduce the load-pulling speed, and finally the load pulling is finished to 140A. As shown in FIG. 1, the load pull rate is 0.5A/s, and the current is balanced for 2min for each 20A load.
After the activation, the current control activation is continuously carried out on the electric pile, for example, the electric pile is continuously pulled to 300A for balancing for 10min, and then the electric pile is reduced to 140A for balancing for 10min, wherein the loading and unloading speed can be increased to 50A/s.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at this time was increased from 0.65V to 0.66V (the operating conditions were 65 ℃ C., the gas metering ratio of the anode and cathode was 1.4/2.0, the gas humidification ratio of the anode and cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and cathode were 60/50kPa, respectively), and the performance was further improved as compared with the activation method in example 1. And hydrogen and air leakage before and after activation for 200 single cell stacksNo significant increase in the amount occurred, indicating that the above-described activation method had no effect on the hydrogen empty cross-leak amount of the MEA.
Example 3
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode. In the primary activation process, humidification gas is used for humidifying the MEA, and then low-loading-speed pulling load is carried out for activation. The humidifying gas can be nitrogen, helium, hydrogen, air and the like, and is preferably nitrogen in consideration of cost and the like, and the humidifying time is 1-30 min. The humidity of the humidified gas is preferably 50 to 100%, the temperature is preferably 20 to 75 ℃, and the temperature is preferably 20 to 40 ℃.
During the humidifying process by using the humidifying gas, the internal resistance of the galvanic pile can be monitored by using an internal resistance instrument so as to presume whether the proton exchange membrane is fully wetted, when the internal resistance of the galvanic pile is reduced gradually until the internal resistance is basically not changed, the proton exchange membrane is fully wetted, and the humidifying of the humidifying gas can be stopped.
After the MEA is wetted by the humidifying gas, the stack is subjected to load-pulling activation by a low load-pulling speed method for the first load pulling, the load-pulling speed is preferably 0.1-10A/s, and after 10-100A of load pulling, the current is balanced for 0.5-10 min to further reduce the load-pulling speed, and finally the load pulling is finished to 140A. As shown in FIG. 1, the load pull rate is 0.5A/s, and the current is balanced for 2min for each 20A load.
After the activation, the voltage control activation is continuously performed on the electric pile, for example, the electric pile is continuously pulled to 0.6V for balancing for 10min, and then the electric pile is lowered to 0.7V for balancing for 10 min.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at the lower part of the reactor was increased from 0.65V to 0.66V (the operating conditions were 65 ℃ C., the gas metering ratio of the anode to the cathode was 1.4/2.0, the gas humidification ratio of the anode to the cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and the cathode were 60/50kPa, respectively), compared with the activation method in example 1The method further improves the performance. And for the pile of 200 single cells, the hydrogen and empty string leakage before and after activation are not obviously improved, which shows that the activation method has no influence on the hydrogen empty string leakage of the MEA.
Example 4
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode. In the primary activation process, humidification gas is used for humidifying the MEA, and then low-loading-speed pulling load is carried out for activation. The humidifying gas can be nitrogen, helium, hydrogen, air and the like, and is preferably nitrogen in consideration of cost and the like, and the humidifying time is 1-30 min. The humidity of the humidified gas is preferably 50 to 100%, the temperature is preferably 20 to 75 ℃, and the temperature is preferably 20 to 40 ℃.
During the humidifying process by using the humidifying gas, the internal resistance of the galvanic pile can be monitored by using an internal resistance instrument so as to presume whether the proton exchange membrane is fully wetted, when the internal resistance of the galvanic pile is reduced gradually until the internal resistance is basically not changed, the proton exchange membrane is fully wetted, and the humidifying of the humidifying gas can be stopped.
After the MEA is wetted by the humidifying gas, the stack is subjected to load-pulling activation by a low load-pulling speed method for the first load pulling, the load-pulling speed is preferably 0.1-10A/s, and after 10-100A of load pulling, the current is balanced for 0.5-10 min to further reduce the load-pulling speed, and finally the load pulling is finished to 140A. As shown in FIG. 1, the load pull rate is 0.5A/s, and the current is balanced for 2min for each 20A load.
After the activation, the hydrogen pump activation is continuously performed on the stack. The specific operation is as follows: humidified hydrogen and nitrogen are respectively introduced into the anode and the cathode, the stack temperature and the gas temperature are both 50 ℃, an external load power supply is used for carrying current to 150A, and the activation time of the hydrogen pump is 20 min.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at the lower part is increased from 0.65V to 0.67V (operation)Under the conditions that the stack temperature was 65 ℃, the gas stoichiometric ratio of the anode and the cathode was 1.4/2.0, the gas humidification ratio of the anode and the cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and the cathode were 60/50kPa, respectively, the performance was further improved as compared with the activation method in example 1. And for the pile of 200 single cells, the hydrogen and empty string leakage before and after activation are not obviously improved, which shows that the activation method has no influence on the hydrogen empty string leakage of the MEA.
Comparative example 1
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode.
The electric pile is activated by directly using a load pulling activation method, and is activated by using a higher load pulling speed. The load pulling speed is 0.5A/s, the load pulling process does not stop under specific current every 20A, the load pulling process is stopped until the load pulling process reaches the target current, and the load pulling process stops at 140A for 15 min.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at the lower part of the reactor was increased from 0.58V to 0.62V (the operating conditions were 65 ℃ C., the gas metering ratio of the anode to the cathode was 1.4/2.0, the gas humidification ratio of the anode and the cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and the cathode were 60/50kPa, respectively). The performance is improved, for 200 single-cell electric stacks, the hydrogen and empty string leakage before and after activation is improved by 30%, and the hydrogen empty string leakage of 4 MEA's is obviously increased after pile disassembly, which shows that the risk of increasing the hydrogen empty string leakage exists when the electric stack is activated by adopting a direct and rapid current carrying method.
Comparative example 2
A method for activating fuel cell stack comprises assembling stack with Membrane Electrode Assembly (MEA), such as 200 MEA, wherein the active area of the MEA is 300cm2The current density can be calculated by dividing the current mentioned below by the active area of the membrane electrode.
And (3) activating the galvanic pile by directly using a low-speed load pulling method, and activating the galvanic pile by using a low-speed load pulling method, wherein the load pulling speed is preferably 0.1-10A/s, and after 10-100A of load pulling, the current is balanced for 0.5-10 min to further reduce the load pulling speed, and finally the load pulling is finished to 140A. As shown in FIG. 1, the load pull rate is 0.5A/s, and the current is balanced for 2min for each 20A load.
After the activation, the galvanic pile is at 1300mA cm-2The average voltage at the lower part of the reactor was increased from 0.58V to 0.63V (the operating conditions were 65 ℃ C., the gas metering ratio of the anode to the cathode was 1.4/2.0, the gas humidification ratio of the anode and the cathode was 40%/0, and the gas pressures (gauge pressures) of the anode and the cathode were 60/50kPa, respectively). The performance is obviously improved. For the pile of 200 single cells, the hydrogen and empty string leakage before and after activation is improved by 10%, and the hydrogen empty string leakage of 1 MEA is found to be increased after pile disassembly, which indicates that the risk of increasing the hydrogen empty string leakage exists when the pile is activated by adopting a direct low-speed pulling load method. But compared with the method of directly and rapidly pulling and loading the activated electric pile, the condition of hydrogen empty leakage is relieved.
The results of performance tests performed on the electric stacks of examples 1 to 4 and comparative examples 1 to 2 are shown in the following table:
Figure BDA0002922881970000071
it can be seen that the method of using humidified gas to wet the MEA and activating the stack at a low rate of pull-loading can reduce the proportion of hydrogen to air leakage after activation of the stack, and the voltage increase is greater. Further, the voltage can be further increased by using an activation method such as current control activation, voltage control activation, and hydrogen pump activation.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. A method for activating fuel cell stack is characterized in that after the stack is assembled by using a membrane electrode, humidification gas is firstly used for humidifying the membrane electrode in the primary activation process, and then the stack is subjected to pull-load activation.
2. The method of activating a fuel cell stack according to claim 1, wherein the humidifying gas is used to monitor the internal resistance of the stack during the humidification of the membrane electrode by using an internal resistance tester.
3. The method for activating a fuel cell stack according to claim 1, wherein the relative humidity of the humidified gas is 20 to 100%, the temperature of the gas is 20 to 80 ℃, and the humidification time is 1 to 30 min.
4. The fuel cell stack activation method according to claim 3, wherein the humidified gas includes nitrogen, helium, hydrogen or air, and has a relative humidity of 50 to 100% and a temperature of 20 to 75 ℃.
5. The fuel cell stack activation method according to claim 4, wherein the temperature is 20 to 40 ℃.
6. The fuel cell stack activation method according to claim 1, wherein the humidification process comprises: humidifying gas is introduced into both the anode and the cathode of the galvanic pile, and the current density is 200-420 mA-cm in the process of introducing the humidifying gas-2。
7. The method of activating a fuel cell stack according to claim 1, wherein the pull-load activation rate is 0.1 to 10A/s, and the current is balanced for 0.5 to 10min after each 10 to 100A of pull-load.
8. The method for activating the fuel cell stack according to claim 7, wherein the load pulling is stopped when the load pulling reaches 140A, and the stabilization is continued for 5-30 min.
9. The fuel cell stack activation method according to claim 1, wherein after the pull-load activation, the further activation is performed using a current control activation, a voltage control activation, or a hydrogen pump activation method.
10. The fuel cell stack activation method according to claim 9, wherein the current control activation method is: controlling the fuel cell current to increase or decrease to activate the stack;
the voltage control activation method comprises the following steps: controlling the fuel cell voltage to increase or decrease to activate the stack;
the activation method of the hydrogen pump comprises the following steps: humidified hydrogen and nitrogen are respectively introduced into two sides of the fuel cell, and current is applied for charging to promote the membrane electrode to recover the proton passing capability.
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CN113991150A (en) * 2021-10-28 2022-01-28 苏州中车氢能动力技术有限公司 Method for positioning leakage monomer in electric pile
CN114695921A (en) * 2022-04-18 2022-07-01 中国第一汽车股份有限公司 Control method and control device for low-temperature start of fuel cell system

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CN110571446A (en) * 2019-09-02 2019-12-13 武汉中极氢能产业创新中心有限公司 Method for activating fuel cell and preventing/improving dry film
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CN111600047A (en) * 2020-05-29 2020-08-28 上海电气集团股份有限公司 Activation method of proton exchange membrane fuel cell stack
CN111725544A (en) * 2020-08-04 2020-09-29 无锡威孚高科技集团股份有限公司 Rapid low-cost activation method for membrane electrode of proton exchange membrane fuel cell

Cited By (4)

* Cited by examiner, † Cited by third party
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CN113991150A (en) * 2021-10-28 2022-01-28 苏州中车氢能动力技术有限公司 Method for positioning leakage monomer in electric pile
CN113991150B (en) * 2021-10-28 2023-02-03 苏州中车氢能动力技术有限公司 Method for positioning leakage monomer in electric pile
CN114695921A (en) * 2022-04-18 2022-07-01 中国第一汽车股份有限公司 Control method and control device for low-temperature start of fuel cell system
CN114695921B (en) * 2022-04-18 2024-03-15 中国第一汽车股份有限公司 Control method and control device for low-temperature start of fuel cell system

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Application publication date: 20210611