CN114024001A - Cathode activation method of proton exchange membrane fuel cell stack - Google Patents
Cathode activation method of proton exchange membrane fuel cell stack Download PDFInfo
- Publication number
- CN114024001A CN114024001A CN202210004518.7A CN202210004518A CN114024001A CN 114024001 A CN114024001 A CN 114024001A CN 202210004518 A CN202210004518 A CN 202210004518A CN 114024001 A CN114024001 A CN 114024001A
- Authority
- CN
- China
- Prior art keywords
- pressure
- cathode
- voltage
- value
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—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
-
- 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
Landscapes
- Fuel Cell (AREA)
- Life Sciences & Earth Sciences (AREA)
- 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)
Abstract
The invention discloses a cathode activation method of a proton exchange membrane fuel cell stack, which comprises the following steps: detecting the air tightness of the galvanic pile; heating the galvanic pile, and introducing nitrogen to the anode and the cathode for purging; hydrogen is introduced into both the anode and the cathode, and the pressure of the anode is greater than that of the cathode; hydrogen gas of the cathode is switched to nitrogen gas for purging; switching nitrogen of the cathode into air; carrying out voltage loading on the single battery, and carrying out voltage decreasing loading according to a fixed voltage value; and repeatedly carrying out voltage loading on the single-chip battery to obtain a plurality of polarization curves, judging whether the voltage deviation between the new polarization curve and the previous polarization curve is less than 10mV, and finishing the activation of the galvanic pile. The invention reduces the oxide on the surface of the catalyst, improves the activity of the catalyst and improves the utilization rate of the catalyst.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a cathode activation method of a proton exchange membrane fuel cell stack.
Background
In a new energy automobile development system, a fuel cell automobile is an important component of the new energy automobile development system. The proton exchange membrane fuel cell is an electrochemical device which directly converts chemical energy into electric energy, heat energy and water after reaction, is not limited by Carnot cycle, has high conversion efficiency, and can continuously operate for a long time as long as enough fuel gas (mainly hydrogen) and oxygen are available.
Among them, a fuel cell stack has a very important component, which is a membrane electrode. The membrane electrode is a key core component for generating electricity of the fuel cell, the membrane electrode and the bipolar plates on the two sides of the membrane electrode form a basic unit of the fuel cell, namely a single fuel cell, and the membrane electrode consists of a polar plate, a gas diffusion layer, a catalyst layer and a proton exchange membrane.
Before the fuel cell is not used, partial molecules in the proton membrane are not regularly arranged, the hydrogen guiding capability is poor, and the proton membrane needs to be activated to open an ion channel of the proton membrane so as to improve the hydrogen guiding capability. If the membrane is put into use in a dry and water-deficient state, the membrane may crack or break down, and the fuel cell must be activated to increase the water content. The proton exchange membrane fuel cell stack can not be directly used after being assembled, and needs to be activated first, so that the activity and the utilization rate of a catalyst in a membrane electrode are improved, and the fuel cell stack can exert the optimal working state and performance.
At present, the activation of the fuel cell stack is generally realized by activating the membrane electrode when the fuel cell stack is under a large current for a long time. However, this approach has disadvantages: when the proton exchange membrane fuel cell stack operates in a high-current state, the water content in the cathode side diffusion layer is easy to be excessive, so that membrane electrode flooding is caused, the transmission of product water and gas is hindered, the utilization rate of a catalyst layer is reduced, the electrochemical reaction on the surface of the catalyst layer is influenced, and the activation effect of the proton exchange membrane fuel cell stack is further influenced.
Disclosure of Invention
In order to solve one of the technical problems, the invention provides a cathode activation method of a proton exchange membrane fuel cell stack, which improves the activity of a catalyst, improves the utilization rate of the catalyst and greatly shortens the activation time of the fuel cell stack by reducing oxides on the surface of the catalyst.
In order to solve the technical problems, the invention provides the following technical scheme: a cathode activation method for a proton exchange membrane fuel cell stack, comprising the steps of:
step S1, pre-activating the galvanic pile, which specifically comprises the following steps: heating the galvanic pile, introducing nitrogen with a first relative humidity value in the heating process, and purging the anode and the cathode of the galvanic pile by using the nitrogen; the flow rate of the nitrogen used for purging the anode is a first flow rate, and the flow rate of the nitrogen used for purging the anode is a second flow rate; the inlet pressure of nitrogen used for purging the anode and the cathode is the first air pressure;
after the temperature of the electric pile is raised to a first temperature value, stabilizing the electric pile at the first temperature value for a period of time; after the galvanic pile is stabilized at the first temperature value for a period of time, ending the pre-activation process, stopping the nitrogen purging, and continuously maintaining the galvanic pile at the first temperature value;
step S2, introducing hydrogen with a second relative humidity value to the anode and the cathode of the galvanic pile; wherein, the flow rates of the hydrogen introduced into the anode and the cathode are both the third flow rate; the pressure of the anodic hydrogen gas is a second pressure, the pressure of the cathodic hydrogen gas is a third pressure, and the second pressure is greater than the third pressure by a specified pressure range, the pressure of the anodic hydrogen gas is stable at the second pressure for a specified period of time, and the pressure of the cathodic hydrogen gas is stable at the second pressure for a specified period of time;
after the pressure of the cathode hydrogen is stabilized at a second pressure for a specified time period, switching the hydrogen introduced into the cathode into nitrogen, wherein the relative humidity value of the introduced nitrogen is equal to the second relative humidity value, and the pressure is equal to a third pressure; the flow of the introduced nitrogen is a third flow;
step S3, after the nitrogen is introduced into the cathode for a set time period, stopping introducing the nitrogen into the cathode of the galvanic pile, and switching to introducing air into the cathode of the galvanic pile, wherein the relative humidity value of the air is equal to the third relative humidity value of the hydrogen, the air pressure is equal to the second air pressure of the hydrogen, the flow of the air is the fourth flow, and the flow of the hydrogen is kept to be the third flow;
step S4, loading the single-chip voltage of the single-chip battery to a first voltage value, and maintaining the single-chip voltage at the first voltage value for a certain time; decreasing according to a set fixed voltage value on the basis of the first voltage value, and maintaining the single-chip voltage for a certain time under each decreased voltage value; and when the voltage of the single chip is reduced to a second voltage value and the second voltage value is maintained for a certain time, stopping loading the voltage of the single chip battery.
Further, step S0 is included before step S1, whether the air tightness of the stack meets the air tightness index is detected, if yes, step S1 is performed, and if not, the stack is reassembled until the air tightness of the stack meets the air tightness index;
further, step S5 is included after step S4, after the loading of the voltage of the single cell is stopped, the polarization curve of the single cell is tested by a linear scanning method to obtain a first polarization curve; wherein, the scanning range OCV of the linear scanning method is-0.5V, the scanning speed is 5mV/s, and the OCV is open-circuit voltage;
step S6, repeating the steps S4-S5 to obtain a second polarization curve, judging whether the voltage deviation between the second polarization curve and the first polarization curve is less than 10mV within the voltage range of 0.55V-0.75V and under the same current, and if so, judging that the activation of the galvanic pile is finished; if the voltage deviation between the second polarization curve and the first polarization curve is greater than or equal to 10mV, the step S6 is repeated until the voltage deviation between the new polarization curve and the previous polarization curve is less than 10mV, and the activation of the cell stack is completed.
Further, the heating treatment of the galvanic pile is carried out in a specific manner as follows: heating the cooling liquid to a first temperature value in advance and maintaining the temperature at the first temperature value; introducing the cooling liquid at the first temperature value into the galvanic pile for heating treatment;
the period of time is 1-5 min.
Further, the electric pile comprises a plurality of single-chip cells, and the calculation formula of the first flow and the third flow is as follows: first flow = volume flow of single cell current number of single cell excess factor;
the calculation formulas of the second flow and the fourth flow are as follows: volume flow of single cell, current, number of single cell and excess coefficient;
wherein the value range of the excess coefficient is 1-3; the volume flow of the single-chip battery is a preset fixed value, and the current is an input value of an external air supply device of the electric pile.
Further, the first flow rate = the third flow rate, the second flow rate = the fourth flow rate, and the predetermined time period = the set time period =20min to 60 min.
Further, the first air pressure is normal pressure, the second air pressure is 100kPa to 150kPa, the third air pressure is 100kPa to 150kPa, and the predetermined air pressure range is 10kPa to 30 kPa.
Further, the first relative humidity value = second relative humidity value = third relative humidity value = relative humidity value 100%.
Further, the first voltage value is 0.6V, the second voltage value is 0.75V, the fixed voltage value is 50mV, and the third voltage value is 0.55V; the certain time is 10min to 30 min.
After the technical scheme is adopted, the invention at least has the following beneficial effects: according to the invention, the oxide on the surface of the catalyst is reduced, so that the activity of the catalyst is improved, and the utilization rate of the catalyst is improved; the invention fully wets the proton exchange membrane, strengthens the hydration of the proton exchange membrane, establishes gas, electron and mass transfer channels and improves the power generation efficiency of the galvanic pile; compared with the traditional constant current activation method of large current forced discharge, the method greatly shortens the activation time.
Drawings
FIG. 1 is a flow chart of the cathode activation method of a PEM fuel cell stack according to the present invention.
FIG. 2 is a comparative plot of the polarization curves of example 2 of the present invention.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application is further described in detail with reference to the drawings and specific embodiments.
Example 1
The invention discloses a cathode activation method of a proton exchange membrane fuel cell stack, wherein the proton exchange membrane fuel cell stack (PEMFC) is the electric stack described in the application; the method is carried out under certain external conditions, and comprises equipment and devices for testing a galvanic pile test bench, a gas circuit (for introducing nitrogen, hydrogen, air and the like), a circuit (for communicating an electronic load and the test bench), a water circuit (for introducing cooling liquid) and the like.
A cathode activation method for a proton exchange membrane fuel cell stack, comprising the steps of:
s0, detecting whether the air tightness of the galvanic pile meets the air tightness index, if so, entering the step S1, and if not, reassembling the galvanic pile until the air tightness of the galvanic pile meets the air tightness index;
step S1, pre-activating the galvanic pile, which specifically comprises the following steps: heating the galvanic pile, introducing nitrogen with a first relative humidity value in the heating process, and purging the anode and the cathode of the galvanic pile by using the nitrogen; the flow rate of the nitrogen used for purging the anode is a first flow rate, and the flow rate of the nitrogen used for purging the anode is a second flow rate; the inlet pressure of nitrogen used for purging the anode and the cathode is the first air pressure;
the electric pile comprises a plurality of single-chip cells, and the first flow rate is calculated in the following mode: first flow = volume flow of single cell current number of single cell excess factor; the second flow is calculated by the volume flow of the single cell, the current, the number of the single cell and an excess coefficient;
the value range of the excess coefficient is 1-3, and the excess coefficient adopted by the first flow can be different from the excess coefficient adopted by the second flow;
the volume flow rate of the single cell is a preset fixed value, and preferably, the volume flow rate of the single cell for the anode is set to be 0.0076, and the volume flow rate of the single cell for the cathode is set to be 0.0182;
the number of the single cells is the total number of the single cells forming the electric pile; the current is a specific current value input by the external circuit equipment, and preferably, the current input value is 40A;
preferably, the first relative humidity value is set to 100% relative humidity value (RH 100%); the first air pressure is normal pressure;
after the temperature of the electric pile is raised to a first temperature value, stabilizing the electric pile at the first temperature value for a period of time; after the galvanic pile is stabilized at the first temperature value for a period of time, ending the pre-activation process, stopping the nitrogen purging, and continuously maintaining the galvanic pile at the first temperature value; preferably, the value of the period of time is as follows: 1-5 min
Preferably, the heating treatment of the stack may specifically adopt a mode of: heating the cooling liquid to a first temperature value in advance and maintaining the temperature at the first temperature value; introducing the cooling liquid at the first temperature value into the galvanic pile for heating treatment; preferably, the first temperature value is 65-80 ℃;
step S2, introducing hydrogen with a second relative humidity value to the anode and the cathode of the galvanic pile; wherein, the flow rates of the hydrogen introduced into the anode and the cathode are both the third flow rate; the pressure of the anodic hydrogen gas is a second pressure, the pressure of the cathodic hydrogen gas is a third pressure, and the second pressure is greater than the third pressure by a specified pressure range, the pressure of the anodic hydrogen gas is stable at the second pressure for a specified period of time, and the pressure of the cathodic hydrogen gas is stable at the second pressure for a specified period of time;
after the pressure of the cathode hydrogen is stabilized at a second pressure for a specified time period, switching the hydrogen introduced into the cathode into nitrogen, wherein the relative humidity value of the introduced nitrogen is equal to the second relative humidity value, and the pressure is equal to a third pressure; the flow of the introduced nitrogen is a third flow; wherein RH100% nitrogen is introduced into the cathode to purge for a specified time period, so as to ensure that the hydrogen of the cathode is purged completely;
preferably, the second relative humidity value = third relative humidity value = first relative humidity value = relative humidity value 100% (RH 100%); the second air pressure is 100kPa to 150kPa, the third air pressure is 100kPa to 150kPa, and the specified air pressure range is 10kPa to 30 kPa; third flow = first flow; the specified time period =20min to 60 min;
for example, the second air pressure is set to 110KPa, the predetermined air pressure range is set to 10KPa, and the third air pressure is set to 100KPa since the second air pressure needs to be 10KPa higher than the third air pressure;
in the step, the hydrogen of the cathode generates a reducing atmosphere, and the principle is as follows: hydrogen existing in a cathode at a low potential (< 0.3V) can reduce oxide, when a large amount of oxide films exist on the surface of the catalyst layer, active sites are less required to slowly carry out chemical reaction with hydrogen to remove the oxide films, and the reaction chemical formula is as follows:
in the reaction formula, oxygen molecules exist because a catalyst layer in the proton exchange membrane is possibly introduced in the spraying preparation process and needs to be activated and eliminated; pt is a catalyst of the internal catalyst layer of the proton exchange membrane;
step S3, after the nitrogen is introduced into the cathode for a set time period, stopping introducing the nitrogen into the cathode of the galvanic pile, and switching to introducing air into the cathode of the galvanic pile, wherein the relative humidity value of the air is equal to the third relative humidity value of the hydrogen, the air pressure is equal to the second air pressure of the hydrogen, the flow of the air is the fourth flow, and the flow of the hydrogen is kept to be the third flow;
preferably, the second flow = a fourth flow, the first flow = a third flow, and the formula for calculating the first flow is equal to the formula for calculating the third flow, and the formula for calculating the second flow is equal to the formula for calculating the fourth flow; first relative humidity value = second relative humidity value = third relative humidity value = relative humidity value 100%; the predetermined time period = the set time period =20min to 60min
Step S4, loading the single-chip voltage of the single-chip battery to a first voltage value, and maintaining the single-chip voltage at the first voltage value for a certain time; decreasing according to a set fixed voltage value on the basis of the first voltage value, and maintaining the single-chip voltage for a certain time under each decreased voltage value; when the voltage of the single chip is decreased to a second voltage value and the second voltage value is maintained for a certain time, the single chip voltage of the single chip battery is stopped to be loaded;
preferably, the value of a certain time is 10min to 30 min; the first voltage value is 0.75V, the fixed voltage value is 50mV, and the second voltage value is 0.55V;
step S5, after loading of the single-chip voltage of the single-chip battery is stopped, testing the polarization curve of the single-chip battery by using a linear scanning method to obtain a first polarization curve; wherein, the scanning range OCV of the linear scanning method is between 0.5V, the scanning speed is 5mV/s, and the OCV is open-circuit voltage;
step S6, repeating the steps S4-S5 to obtain a second polarization curve, judging whether the voltage deviation between the second polarization curve and the first polarization curve is less than 10mV within the voltage range of 0.55V-0.75V and under the same current, and if so, judging that the activation of the galvanic pile is finished; if the voltage deviation between the second polarization curve and the first polarization curve is greater than or equal to 10mV, the step S6 is repeated until the voltage deviation between the new polarization curve and the previous polarization curve is less than 10mV, and the activation of the cell stack is completed. For example, if the second polarization curve is compared with the first polarization curve, the third polarization curve is compared with the second polarization curve, the fourth polarization curve is compared with the third polarization curve, and so on, since steps S5-S6 are repeated, the new polarization curve obtained each time is compared with the old polarization curve obtained last time, and the determination conditions are all in the voltage range of 0.55V to 0.75V and under the same current.
Example 2
The implementation carries out the implementation of specific numerical values on the basis of the embodiment 1: activating a galvanic pile sample consisting of 100 membrane electrodes, wherein the active area of the membrane electrode is 200cm2：
1. The pre-activation process comprises the following steps:
11. heating the galvanic pile to 75 ℃;
12. in the process of heating up, introducing RH100% nitrogen for continuous purging;
13. the nitrogen flow rate was normally applied to a current density of 0.2A/cm2 corresponding to the anode/cathode reactant gas at a metering ratio of 1.5/2, i.e., 40A, the anode side flow rate was 0.0076 x 40 x 100 x 1.5L/min =45.6L/min and the cathode side flow rate was 0.0182 x 40 x 100 x 2L/min = 145.6L/min; wherein, the excess coefficient of the anode adopts 1.5, the excess coefficient of the cathode adopts 2, the same is carried out below;
14. and stabilizing the temperature of the galvanic pile for 5min after the temperature of the galvanic pile reaches 75 ℃.
2. Activation process-hydrogen reducing atmosphere:
21. switching hydrogen, and introducing RH100% hydrogen into the anode/cathode;
22. the flow rates are all corresponding to the anode reaction gas when the current density is normally loaded to 0.2A/cm2, namely the flow rates of the anode and the cathode are both 0.0076 × 40 × 100 × 1.5L/min = 45.6L/min;
24. the anode inlet pressure was 120kPa, the cathode inlet pressure was 110kPa, and after reaching the set value, the stabilization was carried out for 5 min.
3. The second constant current discharge in the activation process:
31. after the nitrogen is introduced into the cathode for 5min, the cathode is switched to RH100% air, the metering ratio of the anode/cathode reaction gas is 1.5/2 when the flow is normally loaded to the current density of 0.2A/cm2, namely when the flow is 40A, the anode side flow is 0.0076 x 40 x 100 1.5L/min =45.6L/min, and the cathode side flow is 0.0182 x 40 x 100 x 2L/min = 145.6L/min;
32. loading the voltage of the single chip to 0.75-0.55V, and staying for 30min at a working point of every 50 mV;
33. testing a battery polarization curve 1 by using a linear scanning method, wherein the scanning range is the average voltage OCV-0.5V, and the scanning speed is 5 mV/s;
34. and repeating the steps 32 and 34 to obtain a polarization curve 2, judging whether the activation is finished according to the deviation degree of the polarization curves 1 and 2, judging that the activation is finished when the voltage deviation between the polarization curves is less than 10mV within the voltage range of 0.55V-0.75V and under the same current, and otherwise, repeating the step 34 to obtain the polarization curves 3, 4, 5 and the like.
As shown in fig. 2, a comparison of polarization curves obtained for this implementation.
In the embodiment, the galvanic pile is activated to reduce the oxide on the surface of the catalyst, so that the activity of the catalyst is improved, and the utilization rate of the catalyst is improved; the membrane is fully wetted, the hydration of a proton exchange membrane is enhanced, gas, electron and mass transfer channels are established, and the power generation efficiency is improved; compared with the traditional constant current activation method of forced discharge with large current, the time is greatly shortened.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (9)
1. A cathode activation method of a proton exchange membrane fuel cell stack is characterized by comprising the following steps:
step S1, pre-activating the galvanic pile, which specifically comprises the following steps: heating the galvanic pile, introducing nitrogen with a first relative humidity value in the heating process, and purging the anode and the cathode of the galvanic pile by using the nitrogen; the flow rate of the nitrogen used for purging the anode is a first flow rate, and the flow rate of the nitrogen used for purging the anode is a second flow rate; the inlet pressure of nitrogen used for purging the anode and the cathode is the first air pressure;
after the temperature of the electric pile is raised to a first temperature value, stabilizing the electric pile at the first temperature value for a period of time; after the galvanic pile is stabilized at the first temperature value for a period of time, ending the pre-activation process, stopping the nitrogen purging, and continuously maintaining the galvanic pile at the first temperature value;
step S2, introducing hydrogen with a second relative humidity value to the anode and the cathode of the galvanic pile; wherein, the flow rates of the hydrogen introduced into the anode and the cathode are both the third flow rate; the pressure of the anodic hydrogen gas is a second pressure, the pressure of the cathodic hydrogen gas is a third pressure, and the second pressure is greater than the third pressure by a specified pressure range, the pressure of the anodic hydrogen gas is stable at the second pressure for a specified period of time, and the pressure of the cathodic hydrogen gas is stable at the second pressure for a specified period of time;
after the pressure of the cathode hydrogen is stabilized at a second pressure for a specified time period, switching the hydrogen introduced into the cathode into nitrogen, wherein the relative humidity value of the introduced nitrogen is equal to the second relative humidity value, and the pressure is equal to a third pressure; the flow of the introduced nitrogen is a third flow;
step S3, after the nitrogen is introduced into the cathode for a set time period, stopping introducing the nitrogen into the cathode of the galvanic pile, and switching to introducing air into the cathode of the galvanic pile, wherein the relative humidity value of the air is equal to the third relative humidity value of the hydrogen, the air pressure is equal to the second air pressure of the hydrogen, the flow of the air is the fourth flow, and the flow of the hydrogen is kept to be the third flow;
step S4, loading the single-chip voltage of the single-chip battery to a first voltage value, and maintaining the single-chip voltage at the first voltage value for a certain time; decreasing according to a set fixed voltage value on the basis of the first voltage value, and maintaining the single-chip voltage for a certain time under each decreased voltage value; and when the voltage of the single chip is reduced to a second voltage value and the second voltage value is maintained for a certain time, stopping loading the voltage of the single chip battery.
2. The method of claim 1, wherein the step S1 is preceded by a step S0 of detecting whether the air tightness of the stack meets an air tightness criterion, and if so, the step S1 is proceeded to, and if not, the stack is reassembled until the air tightness of the stack meets the air tightness criterion.
3. The cathode activation method of PEM fuel cell stack according to claim 1 or 2 further comprising step S5 after step S4, after stopping applying the voltage to the single cell, testing the polarization curve of the single cell by linear scan method to obtain a first polarization curve; wherein, the scanning range OCV of the linear scanning method is-0.5V, the scanning speed is 5mV/s, and the OCV is open-circuit voltage;
step S6, repeating the steps S4-S5 to obtain a second polarization curve, judging whether the voltage deviation between the second polarization curve and the first polarization curve is less than 10mV within the voltage range of 0.55V-0.75V and under the same current, and if so, judging that the activation of the galvanic pile is finished; if the voltage deviation between the second polarization curve and the first polarization curve is greater than or equal to 10mV, the step S6 is repeated until the voltage deviation between the new polarization curve and the previous polarization curve is less than 10mV, and the activation of the cell stack is completed.
4. The cathode activation method of a proton exchange membrane fuel cell stack as claimed in claim 1 or 2, wherein the temperature raising process is performed on the stack by: heating the cooling liquid to a first temperature value in advance and maintaining the temperature at the first temperature value; introducing the cooling liquid at the first temperature value into the galvanic pile for heating treatment;
the period of time is 1-5 min.
5. The cathode activation method of proton exchange membrane fuel cell stack as claimed in claim 1 or 2, wherein the stack comprises a plurality of single cells, and the first flow rate and the third flow rate are calculated by the following formula: first flow = volume flow of single cell current number of single cell excess factor;
the calculation formulas of the second flow and the fourth flow are as follows: volume flow of single cell, current, number of single cell and excess coefficient;
wherein the value range of the excess coefficient is 1-3; the volume flow of the single-chip battery is a preset fixed value, and the current is an input value of an external air supply device of the electric pile.
6. The method of claim 5, wherein the first flow rate = the third flow rate, the second flow rate = the fourth flow rate, and the predetermined time period = the set time period =20min to 60 min.
7. The method of claim 1 or 2, wherein the first pressure is normal pressure, the second pressure is 100kPa to 150kPa, the third pressure is 100kPa to 150kPa, and the predetermined pressure is 10kPa to 30 kPa.
8. The method of claim 1 or 2, wherein the first relative humidity = the second relative humidity = the third relative humidity = the relative humidity 100%.
9. The cathode activation method for a proton exchange membrane fuel cell stack as claimed in claim 1 or 2, wherein the first voltage value is 0.75V, the fixed voltage value is 50mV, and the second voltage value is 0.55V; the certain time is 10min to 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210004518.7A CN114024001B (en) | 2022-01-05 | 2022-01-05 | Cathode activation method of proton exchange membrane fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210004518.7A CN114024001B (en) | 2022-01-05 | 2022-01-05 | Cathode activation method of proton exchange membrane fuel cell stack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114024001A true CN114024001A (en) | 2022-02-08 |
| CN114024001B CN114024001B (en) | 2022-11-08 |
Family
ID=80069587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210004518.7A Active CN114024001B (en) | 2022-01-05 | 2022-01-05 | Cathode activation method of proton exchange membrane fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114024001B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663239A (en) * | 2022-10-13 | 2023-01-31 | 上海神力科技有限公司 | Method for quickly activating cathode and anode of fuel cell stack |
| CN116505031A (en) * | 2023-06-29 | 2023-07-28 | 北京新研创能科技有限公司 | Fuel cell operation method |
| CN117790842A (en) * | 2023-12-28 | 2024-03-29 | 洺源科技(大连)有限公司 | Method for activating MEA (Membrane electrode assembly) of hydrogen fuel cell |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011125840A1 (en) * | 2010-03-31 | 2011-10-13 | 本田技研工業株式会社 | Solid polymer fuel cell activation method |
| US20180166691A1 (en) * | 2016-12-13 | 2018-06-14 | Toyota Jidosha Kabushiki Kaisha | Method of activating catalyst for fuel cell |
| CN109119658A (en) * | 2017-06-26 | 2019-01-01 | 本田技研工业株式会社 | The activation method and activation device of fuel cell |
| US20190305347A1 (en) * | 2018-03-29 | 2019-10-03 | Honda Motor Co., Ltd. | Fuel cell activation method |
| CN110911714A (en) * | 2019-10-23 | 2020-03-24 | 浙江高成绿能科技有限公司 | Proton exchange membrane fuel cell stack activation method |
| CN110993990A (en) * | 2019-12-31 | 2020-04-10 | 上海神力科技有限公司 | Control method for fuel cell stack activation |
| CN111916799A (en) * | 2020-07-27 | 2020-11-10 | 一汽解放汽车有限公司 | Activation method of proton exchange membrane fuel cell |
| JP2021022458A (en) * | 2019-07-26 | 2021-02-18 | 株式会社豊田自動織機 | Cathode impurity removal method in fuel cell system |
| CN112670537A (en) * | 2020-12-24 | 2021-04-16 | 新源动力股份有限公司 | Rapid activation method of metal bipolar plate galvanic pile of proton exchange membrane fuel cell |
-
2022
- 2022-01-05 CN CN202210004518.7A patent/CN114024001B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011125840A1 (en) * | 2010-03-31 | 2011-10-13 | 本田技研工業株式会社 | Solid polymer fuel cell activation method |
| US20180166691A1 (en) * | 2016-12-13 | 2018-06-14 | Toyota Jidosha Kabushiki Kaisha | Method of activating catalyst for fuel cell |
| CN109119658A (en) * | 2017-06-26 | 2019-01-01 | 本田技研工业株式会社 | The activation method and activation device of fuel cell |
| US20190305347A1 (en) * | 2018-03-29 | 2019-10-03 | Honda Motor Co., Ltd. | Fuel cell activation method |
| JP2021022458A (en) * | 2019-07-26 | 2021-02-18 | 株式会社豊田自動織機 | Cathode impurity removal method in fuel cell system |
| CN110911714A (en) * | 2019-10-23 | 2020-03-24 | 浙江高成绿能科技有限公司 | Proton exchange membrane fuel cell stack activation method |
| CN110993990A (en) * | 2019-12-31 | 2020-04-10 | 上海神力科技有限公司 | Control method for fuel cell stack activation |
| CN111916799A (en) * | 2020-07-27 | 2020-11-10 | 一汽解放汽车有限公司 | Activation method of proton exchange membrane fuel cell |
| CN112670537A (en) * | 2020-12-24 | 2021-04-16 | 新源动力股份有限公司 | Rapid activation method of metal bipolar plate galvanic pile of proton exchange membrane fuel cell |
Non-Patent Citations (1)
| Title |
|---|
| 肖伟强 等: ""一种质子交换膜燃料电池的快速活化工艺"", 《电源技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663239A (en) * | 2022-10-13 | 2023-01-31 | 上海神力科技有限公司 | Method for quickly activating cathode and anode of fuel cell stack |
| CN116505031A (en) * | 2023-06-29 | 2023-07-28 | 北京新研创能科技有限公司 | Fuel cell operation method |
| CN116505031B (en) * | 2023-06-29 | 2023-08-25 | 北京新研创能科技有限公司 | Fuel cell operation method |
| CN117790842A (en) * | 2023-12-28 | 2024-03-29 | 洺源科技(大连)有限公司 | Method for activating MEA (Membrane electrode assembly) of hydrogen fuel cell |
| CN117790842B (en) * | 2023-12-28 | 2024-05-31 | 洺源科技(大连)有限公司 | Method for activating MEA (Membrane electrode assembly) of hydrogen fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114024001B (en) | 2022-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114024001B (en) | Cathode activation method of proton exchange membrane fuel cell stack | |
| CN114024000B (en) | Anode activation method of proton exchange membrane fuel cell stack | |
| CN113097538B (en) | Rapid activation method for fuel cell | |
| CN111525156B (en) | Activation method of proton exchange membrane fuel cell stack | |
| CN111916799B (en) | Activation method of proton exchange membrane fuel cell | |
| Yuan et al. | A review of accelerated conditioning for a polymer electrolyte membrane fuel cell | |
| KR101091668B1 (en) | Activation method of MEA using cyclo voltammetry | |
| US20030003336A1 (en) | Method and apparatus for adjusting the temperature of a fuel cell by facilitating methanol crossover and combustion | |
| CN112670537B (en) | Quick activation method for metal bipolar plate pile of proton exchange membrane fuel cell | |
| CN111916800B (en) | Activation method and application of fuel cell membrane electrode | |
| CN114142065B (en) | Proton exchange membrane fuel cell stack pretreatment activation method | |
| CN110783589A (en) | Rapid activation method and application of membrane electrode of proton exchange membrane fuel cell | |
| CN110911714A (en) | Proton exchange membrane fuel cell stack activation method | |
| CN115882009A (en) | Activation method of proton exchange membrane fuel cell stack based on alternating-current impedance meter | |
| CN113363535A (en) | Rapid activation method for proton exchange membrane fuel cell | |
| CN111769308A (en) | Universal activation method for proton exchange membrane fuel cell stack | |
| CN111769309A (en) | Rapid activation method for fuel cell | |
| CN112952151A (en) | Method for activating fuel cell stack | |
| CN115810774A (en) | Rapid activation method of proton exchange membrane fuel cell stack | |
| KR100719095B1 (en) | A direct methanol fuel cell having less crossover phenomenon of methanol comprising a layer of material for controlling diffusion rate of fuel | |
| KR101582378B1 (en) | Recovery method of coolant leak in polymer electrolyte membrane fuel cell | |
| CN113782752A (en) | Membrane electrode, fuel cell and vehicle | |
| CN110970641B (en) | Method for improving discharge performance and operation life of phosphoric acid electrolyte high-temperature membrane fuel cell | |
| CN216250797U (en) | Membrane electrode, fuel cell and vehicle | |
| CN117790842B (en) | Method for activating MEA (Membrane electrode assembly) of hydrogen fuel cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |