CN117154154A - Cathode purging time determination method and device, electronic equipment and fuel cell - Google Patents
Cathode purging time determination method and device, electronic equipment and fuel cell Download PDFInfo
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
- H01M8/04228—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 shut-down
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Abstract
The invention provides a method and a device for determining cathode purging time, electronic equipment and a fuel cell, and belongs to the technical field of fuel cells. According to the cathode purging time determining method, the electric pile is controlled to stably work under a smaller target power value before the electric pile is shut down, so that the accurate initial water content of the proton exchange membrane before the electric pile is shut down can be obtained according to the working characteristics of the electric pile under a stable working condition, the instant water loss rate and the instant water content of the proton exchange membrane during cathode shutdown purging can be obtained by further combining the gas humidity of the purging and the water loss characteristics of the proton exchange membrane, the residual purging time of the proton exchange membrane reaching the expected target water content can be further obtained, more accurate and reliable time basis is provided for cathode purging, and the purging effect and the normal work of the next starting of the electric pile are ensured.
Description
Technical Field
The present invention relates to the field of fuel cell technologies, and in particular, to a method and an apparatus for determining a cathode purge time, an electronic device, and a fuel cell.
Background
A hydrogen-oxygen fuel cell is a device that generates electric power through a chemical reaction of hydrogen and oxygen. The fuel cell consists of a proton exchange membrane, an anode and a cathode. The hydrogen is oxidized under the action of the anode catalyst to generate protons and electrons. Protons pass through the proton exchange membrane, while electrons flow through an external circuit, producing electrical energy.
Purging of a fuel cell is an operation process for exhausting unwanted gases or liquids in a fuel cell system. When the fuel cell is shut down, the anode is purged to discharge liquid water remained on the anode, and the cathode is purged, so that the water content in the fuel cell can be reduced, the fuel cell is prevented from being frozen during the shutdown period, and the normal operation of the fuel cell is further affected when the fuel cell is started next time.
The existing purging is mainly to control the purging duration according to the existing purging conditions set by the fuel cell in different working modes. When the related operation conditions in the working process of the fuel cell are greatly changed, the water content in the fuel cell is greatly different from the water content in the existing working mode, and the water content after the proton exchange membrane is purged is inconsistent with the expected water content according to the existing purging time, so that the purging effect and the normal work of the next start are affected.
Disclosure of Invention
The invention provides a method and a device for determining cathode purging time, electronic equipment and a fuel cell, which are used for solving the defect that the cathode purging time is inaccurate after the front working condition changes in the prior art and achieving the effect of obtaining more accurate cathode purging time.
The invention provides a cathode purging time determining method, which comprises the following steps:
under the condition that a power-off instruction is received by a pile, controlling the pile to run for a target time length under a target power value, wherein the target power value is smaller than a power threshold;
determining a first humidity value of gas entering a cathode of a pile and a second humidity value of gas discharged from the cathode of the pile at the target power value;
determining an initial water content of a proton exchange membrane of the galvanic pile based on the first humidity value and the second humidity value;
controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on a preset purging time calibrated in advance;
continuously determining the instant water loss rate and the instant water content of the proton exchange membrane based on the gas humidity entering the cathode of the galvanic pile during purging and the initial water content;
and re-determining the residual purging time of the cathode of the electric pile based on the instant water loss rate, the instant water content and the target water content.
According to the method for determining the cathode purge time provided by the invention, the determining of the first humidity value of the gas entering the cathode of the electric pile and the second humidity value of the gas discharged from the cathode of the electric pile under the target power value comprises the following steps:
determining a reference cathode inlet humidity value of cathode gas of the electric pile entering the electric pile at the target power value;
determining a reference cathode outlet humidity value of the gas discharged from the cathode of the electric pile corresponding to the reference cathode inlet humidity value based on the humidification performance parameter of the humidifier of the electric pile operated at the target power value;
and under the condition that the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile operating under the target power value, respectively determining the reference cathode inlet humidity value and the reference cathode outlet humidity value as the first humidity value and the second humidity value.
According to the method for determining the cathode purge time provided by the invention, the method for determining the reference cathode outlet humidity value of the gas discharged from the cathode of the electric pile corresponding to the reference cathode inlet humidity value based on the humidification performance parameter of the humidifier when the electric pile operates at the target power value comprises the following steps:
Determining a first partial pressure of water vapor at a dry side outlet of the humidifier based on the reference cathode inlet humidity value;
determining a third water vapor partial pressure of the wet side inlet of the humidifier based on the first water vapor partial pressure, a humidification performance parameter of the humidifier at the target power value for operation of the stack, a gas flow rate of the dry side of the humidifier, a total gas pressure of the dry side of the humidifier, and a second water vapor partial pressure of the dry side inlet of the humidifier;
the reference cathode outlet humidity value is determined based on the third partial pressure of water vapor.
According to the method for determining the cathode purge time provided by the invention, the first water vapor partial pressure, the humidification performance parameter of the humidifier when the electric pile operates at the target power value, the gas flow rate of the dry side of the humidifier, the total gas pressure of the dry side of the humidifier, the second water vapor partial pressure of the inlet of the dry side of the humidifier and the third water vapor partial pressure meet the following relations:
A（P 3 -P 1 ）=Q（P 1 -P 2 ）/P total (S) ；
Wherein A is a humidification performance parameter of a humidifier operated by the electric pile under the target power value, A is used for representing a diffusion rate of gas under a humidifier diaphragm with known area and thickness under a unit air pressure difference and a unit time, and the diffusion rate is used for representing the quantity of gas diffused in the unit time; p (P) 1 For the first water vapor partial pressure, P 2 For the second partial pressure of water vapor, P 3 Q is the gas flow rate of the dry side of the humidifier for the third partial pressure of water vapor, and Q is used for representing the gas mass flowing through the dry side of the humidifier in unit time; p (P) Total (S) Is the total air pressure on the dry side of the humidifier.
According to the method for determining the cathode purging time provided by the invention, the reference cathode inlet humidity value and the reference cathode outlet humidity value meet the water balance model of the electric pile running under the target power value, and the method comprises the following steps:
obtaining the water content of the cathode inlet of the electric pile based on the humidity value of the reference cathode inlet;
determining the water content of the cathode outlet of the electric pile based on the water content of the cathode inlet of the electric pile, the water yield of the electric pile operated under a target power value and the water drainage of the anode outlet of the electric pile;
determining a target humidity value of the cathode of the electric pile based on the water content of the outlet of the cathode of the electric pile;
and under the condition that the absolute value of the difference value between the target humidity value and the reference cathode outlet humidity value is smaller than a humidity threshold value, the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile running at the target power value.
According to the cathode purging time determining method provided by the invention, the instant water loss rate, the instant water content and the target water content meet the following relations:
；
wherein W is the target water content, W t For the instantaneous water content, V t For the instant water loss rate, t1 is the moment corresponding to the instant water content, t2 is the moment corresponding to the target water content, t2-t1 represents the residual purge time, and dt is used for representing unit time.
According to the cathode purging time determining method provided by the invention, the target water content is determined based on the target working condition parameters of the electric pile, wherein the target working condition parameters comprise the environment temperature of the electric pile, the planned shutdown time length of the electric pile and the expected startup temperature of the electric pile.
The invention also provides a cathode purging time determining device, which comprises:
the first processing module is used for controlling the electric pile to run for a target time length under a target power value under the condition that the electric pile receives a shutdown instruction, wherein the target power value is smaller than a power threshold value;
a second processing module for determining a first humidity value of gas entering the cathode of the stack at the target power value and a second humidity value of gas exiting the cathode of the stack;
The third processing module is used for determining the initial water content of the proton exchange membrane of the electric pile based on the first humidity value and the second humidity value;
the fourth processing module is used for controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on preset purging time calibrated in advance;
the fifth processing module is used for continuously determining the instant water loss rate and the instant water content of the proton exchange membrane based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content;
and a sixth processing module for redetermining a remaining purge time of the stack cathode based on the instantaneous water loss rate, the instantaneous water content, and a target water content.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the cathode purge time determination method as described above when executing the program.
The invention also provides a fuel cell comprising a galvanic pile, a humidifier and the electronic equipment.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a cathode purge time determination method as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a cathode purge time determination method as described in any one of the above.
According to the cathode purging time determining method, the cathode purging time determining device, the electronic equipment and the fuel cell, the electric pile is controlled to stably work under a smaller target power value before the electric pile is shut down, so that the accurate initial water content of the proton exchange membrane of the electric pile before the electric pile is shut down can be obtained according to the working characteristic of the electric pile under a stable working condition, the instant water loss rate and the instant water content of the proton exchange membrane during the cathode shutdown purging are further obtained by combining the gas humidity and the water loss characteristic of the proton exchange membrane, the residual purging time of the proton exchange membrane reaching the expected target water content can be further obtained, a more accurate and reliable time basis is provided for the cathode purging, and the purging effect and the normal work of the next starting of the electric pile are ensured.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a cathode purge time determination method provided by the invention;
FIG. 2 is a second flow chart of the cathode purge time determination method according to the present invention;
FIG. 3 is a schematic view of a cathode purge time determination apparatus according to the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The cathode purge time determination method, apparatus, electronic device, and fuel cell of the present invention are described below with reference to fig. 1 to 4.
As shown in fig. 1, the method for determining the cathode purge time according to the embodiment of the invention mainly includes step 110, step 120, step 130, step 140, step 150, and step 160.
Step 110, controlling the electric pile to operate for a target duration under a target power value under the condition that the electric pile receives a shutdown instruction.
It can be appreciated that in the prior art, the reaction on the proton exchange membrane in the fuel cell gradually stops when the electric pile receives a shutdown command. On this basis, purging of the anode and cathode may be turned on according to the respective operating conditions.
In this embodiment, when the pile receives the shutdown instruction, the pile may be controlled to operate for a target time period under the target power value.
It should be noted that the target power value is smaller than the power threshold. The power threshold may be a smaller power value, or the target duration may be a shorter duration, and both the power threshold and the target duration may be set according to the actual situation of the fuel cell stack, which is not limited herein.
When the electric pile operates at the target power value, the internal part of the fuel cell can reach a relatively stable state, the operation process of the humidifier and the water balance process in the fuel cell can reach a stable state, and excessive fuel can not be consumed to influence the subsequent shutdown process.
Step 120 determines a first humidity value of the gas entering the cathode of the stack at the target power value and a second humidity value of the gas exiting the cathode of the stack.
The water content of the stack proton exchange membrane is closely related to the humidity of the gas entering the stack cathode and the humidity of the gas exiting the stack cathode when the stack is operating in a relatively stable condition.
Step 130, determining an initial water content of the proton exchange membrane of the stack based on the first humidity value and the second humidity value.
In order to determine the water content of the proton exchange membrane of the electric pile under the target power value, a first humidity value of gas entering the cathode of the electric pile under the target power value and a second humidity value of gas discharged from the cathode of the electric pile can be determined first, then the water content of the proton exchange membrane when the electric pile operates under the target power value is determined according to the first humidity value and the second humidity value, and the water content at the moment is used as the initial water content of the proton exchange membrane when the cathode of the electric pile is purged after the electric pile is shut down.
It will be appreciated that in the case of a stack in steady state operation, the water content of the proton exchange membrane of the stack is less affected by other factors and is more correlated to the cathode inlet humidity and the cathode outlet humidity. In this case, the greater the humidity gradient between the cathode inlet humidity and the proton exchange membrane, the greater the change in water content of the proton exchange membrane.
The water content of the proton exchange membrane can be measured and calibrated under different cathode inlet humidity and cathode outlet humidity according to the current steady-state working condition under an experimental scene, and then the water content of the proton exchange membrane corresponding to the current first humidity value and the second humidity value environment can be obtained as the initial water content according to the relationship among the cathode inlet humidity, the cathode outlet humidity and the water content of the proton exchange membrane.
And 140, controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on the preset purging time calibrated in advance.
It can be understood that after the water content of the proton exchange membrane of the electric pile operating under the target power value is obtained, the water content at the moment can be used as the initial water content of the proton exchange membrane when the cathode of the electric pile is purged after the electric pile is shut down due to the lower target power value, so that the residual purging time of purging can be conveniently determined subsequently. In this case, the stack is controlled to enter a shutdown process and shutdown purge is turned on.
It is to be understood that the cathode is purged according to a preset purge time calibrated in advance when the shutdown purge is performed. The fuel cell can be calibrated according to different purging times under different working modes, and the performance of the fuel cell after being started after the purging times are observed, so that the optimal purging time under the different working modes is determined according to the performance, and is used as the final calibrated preset purging time.
Step 150, continuously determining the instant water loss rate and the instant water content of the proton exchange membrane based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content.
In the purging process, the water content of the proton exchange membrane is continuously reduced at a certain instant water loss rate on the basis of the initial water content, so that the instant water content of the proton exchange membrane at a certain moment can be obtained.
It should be noted that the water loss rate of the proton exchange membrane under different water contents and different purge gas humidity can be calibrated under experimental conditions, so that the instantaneous water content of the proton exchange membrane in the purging process can be continuously calculated by combining the purge gas humidity in the current purging process according to the calibrated data.
The instantaneous water content and the initial water content of the proton exchange membrane satisfy the following relationship:
；
wherein W is 0 To initiate the initial moisture content at the initial time of purging, W t For the instant water content, t0 is the initial time corresponding to the initial water content, V t For the instantaneous water loss rate corresponding to the initial moment, t1 is the moment corresponding to the current instantaneous water content, and dt is used for representing unit time.
Step 160, re-determining the remaining purge time of the stack cathode based on the instantaneous water loss rate, the instantaneous water content, and the target water content.
It should be noted that, during shutdown of the fuel cell, the proton exchange membrane needs to maintain a certain water content, i.e., a target water content. Proton exchange membranes need to have a certain amount of moisture in order to remain in a state that is not too wet or too dry.
Too high a water content of the proton exchange membrane may cause problems in the fuel cell system in low temperature environments, for example, freezing of water in the fuel cell stack may cause clogging, thereby affecting the flow channel of the gas and affecting the next start-up of the fuel cell system.
In some embodiments, too long a purge may cause the proton exchange membrane to become too dry, so that the proton exchange membrane will have too low a conductivity at the next system start-up, which can affect the performance of the fuel cell system after start-up and reduce the durability of the fuel cell stack.
In some embodiments, the target water content is determined based on target operating parameters of the stack, including an ambient temperature at which the stack is located, a planned downtime period of the stack, and an estimated startup temperature of the stack.
It can be appreciated that the water content in the proton exchange membrane cannot be too high, so that icing occurs, and thus the target operating condition parameters include the ambient temperature of the electric pile, the planned shutdown time of the electric pile, the predicted startup temperature of the electric pile, and the like.
A smaller target moisture content may be set the lower the ambient temperature and the longer the planned downtime. And when the starting temperature is higher, a higher target water content can be set, so that the fuel cell system can quickly enter into a working state.
In some embodiments, the instantaneous water content at different moments in time can be obtained continuously through the calculation method, and then the instantaneous water content can be compared with the target water content. And continuing to purge the cathode for a certain time when the calculated instant water content does not reach the target water content, and determining the current instant water content again. In this process, the instantaneous water content is continuously calculated until the instantaneous water content drops to the target water content.
Of course, when the instantaneous water content is calculated each time, the more accurate instantaneous water loss rate can be redetermined according to the current purge gas humidity and the latest water content of the proton exchange membrane, so that the calculation result is more accurate.
In other words, by continuously re-determining the instantaneous water content at different times, it can be determined whether the cathode still needs to be purged continuously and the remaining purge time is possible, so that the water content of the proton exchange membrane reaches the target water content.
In the purging process, the purged gas humidity can be obtained in real time through a humidity sensor, then the instant water loss rate and the instant water content are obtained based on the initial water content, in the purging process, according to the water loss characteristic rule data calibrated by the proton exchange membrane, an iterative calculation integral formula mode is adopted, the instant water loss rate and the instant water content are continuously and iteratively updated in the calculating process, the purging time required at the current moment is determined according to the instant water loss rate, the instant water content and the target water content, namely the current purging time required is determined to be the residual purging time of the cathode of the galvanic pile, and then the galvanic pile can be purged according to the residual purging time.
In some embodiments, the instantaneous water loss rate, the instantaneous water cut, and the target water cut satisfy the following relationship:
。
wherein W is the target water content, W t Is the instantaneous water content, V t For the instantaneous water loss rate, t1 is the moment corresponding to the instantaneous water content, t2 is the moment corresponding to the target water content, t2-t1 represents the residual purge time, and dt is used to represent the unit time.
At the initial time of purging, the instantaneous water content W t I.e. the initial water content W of the proton exchange membrane 0 。
It can be appreciated that in the purging process, the remaining purging time can be recalculated according to the continuously updated instantaneous water content and the instantaneous water loss rate, so that more accurate remaining purging time is obtained, and the optimal purging effect is realized.
According to the cathode purging time determining method provided by the embodiment of the invention, the stable operation of the electric pile is controlled under a smaller target power value before the electric pile is shut down, so that the accurate initial water content of the proton exchange membrane of the electric pile before the electric pile is shut down can be obtained according to the operating characteristic of the electric pile under a stable working condition, the instant water loss rate and the instant water content of the proton exchange membrane during the cathode shutdown purging can be obtained by further combining the gas humidity of the purging and the water loss characteristic of the proton exchange membrane, the residual purging time of the proton exchange membrane reaching the expected target water content can be further obtained, more accurate and reliable time basis is provided for the cathode purging, and the purging effect and the normal operation of the next starting of the electric pile are ensured.
In some embodiments, the first humidity value of the gas entering the cathode of the stack at the target power value and the second humidity value of the gas exiting the cathode of the stack may be directly obtained by humidity sensors mounted at the cathode inlet of the stack and the cathode outlet of the stack, respectively.
However, the cathode inlet of the stack and the cathode outlet of the stack are in a high-temperature and high-humidity environment, the data acquired by the humidity sensor has large errors, and the humidity sensor is not installed at the positions to acquire the humidity data of the gas in some fuel cell systems.
In some embodiments, as shown in FIG. 2, step 120: determining a first humidity value of the gas entering the cathode of the stack at the target power value and a second humidity value of the gas exiting the cathode of the stack may specifically include steps 121, 122 and 123.
Step 121, determining a reference cathode inlet humidity value of cathode gas entering the stack at a target power value.
It should be noted that the reference cathode inlet humidity value may be an assumed value. According to the operation rule of the fuel cell, when the electric pile of the fuel cell stably operates under the target power, the cathode inlet humidity value is generally in a reasonable interval range in order to ensure the normal operation of the fuel cell.
It can be understood that different cathode inlet humidity values of the electric pile which normally operates under the target power can be measured in an experimental environment, and then a reference range interval of the cathode inlet humidity values is obtained.
In this embodiment, the values of the reference cathode inlet humidity values may be obtained from the reference range intervals in order from small to large, so as to obtain the values of the plurality of reference cathode inlet humidity values, thereby improving the efficiency of measurement and calculation.
Step 122, determining a reference cathode outlet humidity value of the gas exhausted from the cathode of the electric pile corresponding to the reference cathode inlet humidity value based on the humidification performance parameter of the humidifier when the electric pile is operated at the target power value.
It should be noted that the proton exchange membrane needs to maintain a certain hydration state to maintain its ion conductivity. The moisture can promote proton adsorption and desorption in the proton exchange membrane, and the activity of the membrane is maintained. Too low a humidity may cause the proton exchange membrane to dry out, degrading proton conductivity and thus affecting the output performance of the fuel cell.
However, the humidity of the air entering the fuel cell for reaction may be low, and in order to ensure proper operation of the proton exchange membrane, to maintain the performance and efficiency of the fuel cell system, a humidifier is often required to wet the air.
A humidifier of a fuel cell is a device for controlling and regulating moisture in the fuel cell. Since the reaction of the fuel cell requires a certain amount of moisture to operate normally, the humidifier functions to maintain a proper humidity inside the fuel cell to ensure efficient operation thereof. The humidifier is provided with a diaphragm dividing the humidifier into a wet side and a dry side, and water vapor on the wet side in the humidifier is diffused to the dry side through the diaphragm to moisten air on the dry side. The wet side of the humidifier includes a wet side outlet and a wet side inlet. While the dry side of the humidifier includes a dry side inlet and a dry side outlet.
The air exiting the outlet on the dry side of the humidifier has a higher humidity and then enters the cathode of the stack. The steam generated during the operation of the electric pile is discharged from the cathode outlet of the electric pile together with cathode air, and enters the humidifier through the wet side inlet of the humidifier, wherein part of the steam entering the wet side is diffused to the dry side of the humidifier through the diaphragm, and the air on the dry side is continuously wetted. Another portion of the water vapor may exit the humidifier via the wet side outlet.
The dry side inlet of the dry side of the humidifier is communicated with the atmosphere, and the dry side outlet is communicated with the air inlet of the galvanic pile, namely the inlet of the cathode. Part of the water vapor entering the stack comes from the atmospheric environment, while the other part comes from water vapor diffusing from the wet side to the dry side of the humidifier.
Humidification performance parameters of the humidifier are used to characterize the diffusion of water vapor between the dry and wet sides of the humidifier.
It will be appreciated that the reference cathode outlet humidity value of the gas exhausted from the cathode of the stack corresponding to the reference cathode inlet humidity value may be determined according to the humidification performance parameter of the humidifier at the target power value of the operation of the stack, and may be specifically achieved by the following procedure.
It will be appreciated that the first partial pressure of water vapor at the dry side outlet of the humidifier may be determined based on the reference cathode inlet humidity value.
The partial pressure of water vapor in the gas can be calculated by using saturated water vapor pressure and estimated by using information such as gas temperature.
It will be appreciated that the gas relative humidity may be determined by the ratio of the partial pressure of water vapor to the saturated water vapor pressure of the gas at the current temperature, and further by finding the saturated water vapor pressure at the current temperature, and combining the current gas relative humidity, the first partial pressure of water vapor may be obtained.
On the basis of the first water vapor partial pressure, a humidification performance parameter of the humidifier at a target power value for operation of the stack, a gas flow rate at a dry side of the humidifier, a total gas pressure at the dry side of the humidifier, and a second water vapor partial pressure at an inlet at the dry side of the humidifier, a third water vapor partial pressure at an inlet at the wet side of the humidifier is determined.
It should be noted that, the dry side inlet of the humidifier may be directly connected to the atmospheric environment, and the total air pressure of the dry side inlet is the atmospheric air pressure. Of course, in some embodiments, the dry side inlet of the humidifier is also provided with a pressurizing device to increase the intake air amount of the fuel cell. In this case, the total air pressure at the dry side inlet of the humidifier is the air pressure after the pressurizing device is pressurized.
The relative humidity of the inlet gas at the dry side of the humidifier can be obtained according to the relative humidity sensor, the temperature of the inlet gas at the dry side of the humidifier is obtained through the temperature sensor, the saturated vapor pressure at the current temperature is obtained through searching the saturated vapor pressure gauge, and the second vapor partial pressure is obtained by combining the relative humidity of the inlet gas at the dry side of the humidifier.
In some embodiments, the first water vapor partial pressure, the humidification performance parameter of the humidifier at which the stack is operating at the target power value, the gas flow rate at the dry side of the humidifier, the total gas pressure at the dry side of the humidifier, the second water vapor partial pressure at the inlet at the dry side of the humidifier, and the third water vapor partial pressure satisfy the following relationship:
A（P 3 -P 1 ）=Q（P 1 -P 2 ）/P total (S) ；
Wherein, A is the humidification performance parameter of the humidifier when the electric pile operates under the target power value, A is used for expressing the diffusion rate of gas under the membrane of the humidifier with known area and thickness under the unit air pressure difference and unit time, and the diffusion rate is used for expressing the quantity of gas substances diffused in unit time; p (P) 1 For a first partial pressure of water vapor, P 2 For the second partial pressure of water vapor, P 3 For the third partial pressure of water vapor, Q is the gas flow rate of the dry side of the humidifier, and Q is used for expressing the gas mass flowing through the dry side of the humidifier in unit time; p (P) Total (S) Is the total air pressure on the dry side of the humidifier.
P is the same as 1 、P 2 、P 3 P Total (S) The unit of (a) may be Pa, the unit of Q may be mol/s, and the unit of A may be mol/(Pa.s).
In some embodiments, the humidification performance parameter of the humidifier satisfies the following relationship with the diffusion rate of the membrane, the area of the membrane, and the thickness of the membrane:
A=DS/dx；
wherein A is a humidification performance parameter of the humidifier, and D is used for representing the diffusion rate of gas in the membrane of the humidifier under the conditions of unit air pressure difference, unit area, unit thickness and unit time; s is the area of the diaphragm and dx is the thickness of the diaphragm.
In the above formula, A may be in units of mol/(Pa.s), D may be in units of mol/(Pa.s.m), and S may be in units of m 2 Dx may be in units of m.
It can be understood that, through the working principle of the humidifier, the third water vapor partial pressure corresponding to each assumed reference cathode inlet humidity value can be accurately obtained, and then the reference cathode outlet humidity value corresponding to each reference cathode inlet humidity value can be determined based on the third water vapor partial pressure, and then a plurality of groups of reference cathode inlet humidity values and reference cathode outlet humidity values which are in one-to-one correspondence can be obtained, so that the accurate first humidity value and the accurate second humidity value can be further determined later.
Step 123, determining the reference cathode inlet humidity value and the reference cathode outlet humidity value as a first humidity value and a second humidity value, respectively, in case the reference cathode inlet humidity value and the reference cathode outlet humidity value satisfy a water balance model of the operation of the electric pile at the target power value.
In a stack of fuel cells, a water balance model under steady state conditions is used to describe the process of water generation, transport and consumption in the proton exchange membrane to maintain a suitable humidity level.
It will be appreciated that under steady state conditions, the amount of water remaining inside the stack may be understood to be constant. In this case, the water content of the cathode inlet of the electric pile and the water generated by the electric pile reaction are water sources in the whole fuel cell, and according to the law of mass conservation, the water entering the electric pile, the water generated by the electric pile reaction and the water discharged by the electric pile conform to the law of mass conservation, so that a water balance model can be obtained: the sum of the water content of the cathode inlet of the electric pile and the electricity generation water yield of the electric pile is equal to the sum of the water content of the cathode outlet and the water discharge of the anode outlet.
The water balance model under steady state conditions takes into account the water generation, transport and consumption processes to ensure that the water in the proton exchange membrane is maintained at the proper level. This maintains the efficiency of proton conduction and provides a suitable humidity condition to ensure stable operation and performance of the fuel cell system.
It will be appreciated that where the reference cathode inlet humidity value and the reference cathode outlet humidity value satisfy the water balance model for the stack operating at the target power value, it is indicated that the reference cathode inlet humidity value is correct.
In some embodiments, the reference cathode inlet humidity value and the reference cathode outlet humidity value satisfy a water balance model for operation of the stack at the target power value, which may include the following processes.
The water content of the cathode inlet of the electric pile can be obtained based on the humidity value of the reference cathode inlet.
In this case, the flow rate of the gas passing through the cathode inlet over a period of time may be determined first, and the gas flow rate at the cathode inlet of the stack may be obtained by a gas flow meter or other measuring device at the dry side inlet of the humidifier.
It should be noted that, when the calculation is performed, the temperature and pressure of the gas entering the cathode inlet of the electric pile may be regarded as constant, so as to directly obtain the water content of the cathode inlet of the electric pile in the target period according to the flow rate and humidity of the gas.
Further, the water content of the cathode outlet of the stack may be determined based on the water content of the cathode inlet of the stack, the water production of the stack operating at the target power value, and the water displacement of the anode outlet of the stack.
The water yield of the electric pile running under the target power value can be calculated according to parameters such as the output current of the electric pile, the number of single batteries in the electric pile and the like.
When only the water vapor is discharged from the cathode outlet of the stack, the water discharged from the anode outlet of the stack is negligible, and the water in the stack is discharged through the outlet of the cathode and enters the humidifier. When the water vapor at the outlet of the cathode is supersaturated, the liquid water is directly discharged from both the cathode and the anode. The liquid water discharged from the anode outlet of the stack can be collected by providing a container at the outlet of the drain pipe corresponding to the anode, and the water discharge amount at the anode outlet can be obtained.
Under the experimental environment, the water discharge of the anode outlet and the water discharge of the cathode outlet can be counted under the current target power value, and then the ratio of the liquid water quantity discharged from the anode outlet to the total liquid water quantity discharged from the cathode and the anode is calibrated, so that the water discharge of the cathode outlet is obtained according to the calibrated ratio and the water discharge of the anode outlet at the moment.
In this case, the water content of the cathode outlet of the stack can be obtained according to the actual situation. When the liquid water is not discharged from the anode outlet, the water discharge of the anode outlet of the electric pile is zero, the water vapor of the cathode outlet of the electric pile is in an unsaturated state, and the water discharge of the cathode outlet of the electric pile enters the humidifier in the form of unsaturated water vapor.
Under the condition that the water displacement of the cathode outlet of the electric pile enters the humidifier in the form of unsaturated water vapor, the water displacement of the cathode outlet of the electric pile can be obtained according to the water content of the cathode inlet of the electric pile and the water generated by the electric pile reaction. Further, the volume of the vapor discharged from the cathode outlet of the electric pile can be obtained through a flowmeter, the pressure of the gas discharged from the cathode outlet can be obtained through a pressure sensor, the relative humidity of the gas discharged from the cathode outlet can be obtained according to the water content, the volume of the vapor and the ratio of the partial pressure of the vapor to the pressure of the gas discharged from the cathode outlet, and then the target humidity value of the cathode outlet of the electric pile can be determined according to the saturated vapor pressure and the partial pressure of the vapor at the current temperature.
When the liquid water is discharged from the anode outlet, the gas discharged from the cathode outlet of the electric pile is saturated steam, the relative humidity is 100%, and then the water discharge from the cathode outlet of the electric pile is converted into a humidity value by combining the liquid water discharged from the cathode outlet, so that the target humidity value of the cathode outlet of the electric pile is determined. It will be appreciated that since the gas at the cathode outlet of the stack is already saturated steam, the target humidity value converted at this time is a value greater than 100%, and the target humidity value is used for comparison with the reference cathode outlet humidity value.
When the liquid water is discharged from the anode outlet, the water discharge amount of the anode outlet of the electric pile can be determined by the volume of the water collected by the water discharge pipeline corresponding to the anode, and the water discharge amount of the cathode outlet of the electric pile can be obtained according to the water discharge amount ratio of the anode outlet.
In the case that the absolute value of the difference between the target humidity value and the reference cathode outlet humidity value is smaller than the humidity threshold value, it is explained that the previously assumed reference cathode inlet humidity value is accurate, i.e. the reference cathode inlet humidity value and the reference cathode outlet humidity value satisfy the water balance model of the pile operating at the target power value.
In this embodiment, by combining the working principle of the humidifier working under the stable target power value and the water balance model of the electric pile, an accurate first humidity value and second humidity value can be obtained, so that the water content of the proton exchange membrane can be conveniently determined, and a more accurate basis is provided for determining the purging duration.
The cathode purge time determining device provided by the invention is described below, and the cathode purge time determining device described below and the cathode purge time determining method described above can be referred to correspondingly.
As shown in fig. 3, the cathode purge time determining apparatus according to the embodiment of the present invention mainly includes a first processing module 310, a second processing module 320, a third processing module 330, a fourth processing module 340, a fifth processing module 350, and a sixth processing module 360.
The first processing module 310 is configured to control, when the electric pile receives a shutdown instruction, the electric pile to operate at a target power value for a target duration, where the target power value is less than a power threshold;
the second processing module 320 is configured to determine a first humidity value of gas entering the cathode of the stack and a second humidity value of gas exiting the cathode of the stack at a target power value;
the third processing module 330 is configured to determine an initial water content of the proton exchange membrane of the stack based on the first humidity value and the second humidity value;
the fourth processing module 340 is configured to control the galvanic pile to enter a shutdown process and start shutdown purging of the cathode based on a preset purging time calibrated in advance;
the fifth processing module 350 is configured to continuously determine an instantaneous water loss rate and an instantaneous water content of the proton exchange membrane based on the humidity of the gas entering the cathode of the stack during purging and the initial water content;
the sixth processing module 360 is operable to re-determine the remaining purge time for the stack cathode based on the instantaneous water loss rate, the instantaneous water content, and the target water content.
According to the cathode purging time determining device provided by the embodiment of the invention, the electric pile is controlled to stably work under a smaller target power value before the electric pile is shut down, so that the accurate initial water content of the proton exchange membrane before the electric pile is shut down can be obtained according to the working characteristic of the electric pile under a stable working condition, the instant water loss rate and the instant water content of the proton exchange membrane when the cathode is shut down and purged are further obtained by combining the purged gas humidity and the water loss characteristic of the proton exchange membrane, the residual purging time of the proton exchange membrane reaching the expected target water content can be further obtained, a more accurate and reliable time basis is provided for cathode purging, and the purging effect and the normal work of the next start of the electric pile are ensured.
In some embodiments, the second processing module 320 is further configured to determine a reference cathode inlet humidity value for cathode gas entering the stack at the target power value; determining a reference cathode outlet humidity value of gas discharged from a cathode of the electric pile corresponding to the reference cathode inlet humidity value based on a humidification performance parameter of a humidifier of the electric pile operated at a target power value; and determining the reference cathode inlet humidity value and the reference cathode outlet humidity value as a first humidity value and a second humidity value respectively under the condition that the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile operating at the target power value.
In some embodiments, the second processing module 320 is further configured to determine a first partial pressure of water vapor at the humidifier dry side outlet based on the reference cathode inlet humidity value; determining a third water vapor partial pressure at a wet side inlet of the humidifier based on the first water vapor partial pressure, a humidification performance parameter of the humidifier at a target power level for operation of the stack, a gas flow rate at a dry side of the humidifier, a total gas pressure at the dry side of the humidifier, and the second water vapor partial pressure at the dry side inlet of the humidifier; a reference cathode outlet humidity value is determined based on the third partial pressure of water vapor.
In some embodiments, the first water vapor partial pressure, the humidification performance parameter of the humidifier at which the stack is operating at the target power value, the gas flow rate at the dry side of the humidifier, the total gas pressure at the dry side of the humidifier, the second water vapor partial pressure at the inlet at the dry side of the humidifier, and the third water vapor partial pressure satisfy the following relationship:
A（P 3 -P 1 ）=Q（P 1 -P 2 ）/P total (S) ；
Wherein A is the humidification performance parameter of the humidifier operated by the electric pile under the target power value, P 1 For the first partial pressure of water vapor, A is used to represent the diffusion rate of gas under a humidifier membrane of known area and thickness at a unit differential pressure and a unit time, and the diffusion rate is used to represent the gas species diffused per unit timeAn amount of; p (P) 2 For the second partial pressure of water vapor, P 3 For the third partial pressure of water vapor, Q is the gas flow rate of the dry side of the humidifier, and Q is used for expressing the gas mass flowing through the dry side of the humidifier in unit time; p (P) Total (S) Is the total air pressure on the dry side of the humidifier.
In some embodiments, the second processing module 320 is further configured to obtain a moisture content of the cathode inlet of the stack based on the reference cathode inlet humidity value; determining the water content of the cathode outlet of the electric pile based on the water content of the cathode inlet of the electric pile, the water yield of the electric pile operating at the target power value and the water drainage of the anode outlet of the electric pile; determining a target humidity value of a cathode of the electric pile based on the water content of an outlet of the cathode of the electric pile; and under the condition that the absolute value of the difference value between the target humidity value and the reference cathode outlet humidity value is smaller than the humidity threshold value, the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile running at the target power value.
In some embodiments, the instantaneous water loss rate, the instantaneous water cut, and the target water cut satisfy the following relationship:
；
wherein W is the target water content, W t Is the instantaneous water content, V t For the instantaneous water loss rate, t1 is the moment corresponding to the instantaneous water content, t2 is the moment corresponding to the target water content, t2-t1 represents the residual purge time, and dt is used to represent the unit time.
In some embodiments, the target water content is determined based on target operating parameters of the stack, including an ambient temperature at which the stack is located, a planned downtime period of the stack, and an estimated startup temperature of the stack.
Fig. 4 illustrates a physical schematic diagram of an electronic device, as shown in fig. 4, which may include: processor 410, communication interface (Communications Interface) 420, memory 430 and communication bus 440, wherein processor 410, communication interface 420 and memory 430 communicate with each other via communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform a cathode purge time determination method comprising: under the condition that the electric pile receives a shutdown instruction, controlling the electric pile to run for a target time length under a target power value, wherein the target power value is smaller than a power threshold; determining a first humidity value of gas entering the cathode of the electric pile at a target power value and a second humidity value of gas discharged from the cathode of the electric pile; determining an initial water content of a proton exchange membrane of the electric pile based on the first humidity value and the second humidity value; controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on a preset purging time calibrated in advance; based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content, the instantaneous water loss rate and the instantaneous water content of the proton exchange membrane are continuously determined; and re-determining the residual purging time of the cathode of the electric pile based on the instant water loss rate, the instant water content and the target water content.
Further, the logic instructions in the memory 430 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
On the other hand, the invention also provides a fuel cell which comprises a galvanic pile, a humidifier and the electronic equipment.
In another aspect, the present invention also provides a computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the cathode purge time determination method provided by the above methods, the method comprising: under the condition that the electric pile receives a shutdown instruction, controlling the electric pile to run for a target time length under a target power value, wherein the target power value is smaller than a power threshold; determining a first humidity value of gas entering the cathode of the electric pile at a target power value and a second humidity value of gas discharged from the cathode of the electric pile; determining an initial water content of a proton exchange membrane of the electric pile based on the first humidity value and the second humidity value; controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on a preset purging time calibrated in advance; based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content, the instantaneous water loss rate and the instantaneous water content of the proton exchange membrane are continuously determined; the remaining purge time for the stack cathode is redetermined based on the instantaneous water loss rate, the instantaneous water content, and a target water content, the target water content being determined based on an ambient temperature at which the stack is located, a planned downtime period of the stack, and an estimated startup temperature of the stack.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the cathode purge time determination method provided by the above methods, the method comprising: under the condition that the electric pile receives a shutdown instruction, controlling the electric pile to run for a target time length under a target power value, wherein the target power value is smaller than a power threshold; determining a first humidity value of gas entering the cathode of the electric pile at a target power value and a second humidity value of gas discharged from the cathode of the electric pile; determining an initial water content of a proton exchange membrane of the electric pile based on the first humidity value and the second humidity value; controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on a preset purging time calibrated in advance; based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content, the instantaneous water loss rate and the instantaneous water content of the proton exchange membrane are continuously determined; the remaining purge time for the stack cathode is redetermined based on the instantaneous water loss rate, the instantaneous water content, and a target water content, the target water content being determined based on an ambient temperature at which the stack is located, a planned downtime period of the stack, and an estimated startup temperature of the stack.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for determining a cathode purge time, comprising:
under the condition that a power-off instruction is received by a pile, controlling the pile to run for a target time length under a target power value, wherein the target power value is smaller than a power threshold;
determining a first humidity value of gas entering a cathode of a pile and a second humidity value of gas discharged from the cathode of the pile at the target power value;
determining an initial water content of a proton exchange membrane of the galvanic pile based on the first humidity value and the second humidity value;
controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on a preset purging time calibrated in advance;
Continuously determining the instant water loss rate and the instant water content of the proton exchange membrane based on the gas humidity entering the cathode of the galvanic pile during purging and the initial water content;
and re-determining the residual purging time of the cathode of the electric pile based on the instant water loss rate, the instant water content and the target water content.
2. The cathode purge time determination method according to claim 1, wherein the determining a first humidity value of the gas entering the stack cathode at the target power value and a second humidity value of the gas discharged from the stack cathode comprises:
determining a reference cathode inlet humidity value of cathode gas of the electric pile entering the electric pile at the target power value;
determining a reference cathode outlet humidity value of the gas discharged from the cathode of the electric pile corresponding to the reference cathode inlet humidity value based on the humidification performance parameter of the humidifier of the electric pile operated at the target power value;
and under the condition that the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile operating under the target power value, respectively determining the reference cathode inlet humidity value and the reference cathode outlet humidity value as the first humidity value and the second humidity value.
3. The method of claim 2, wherein determining a reference cathode outlet humidity value for the gas exhausted from the cathode of the stack corresponding to the reference cathode inlet humidity value based on a humidification performance parameter of a humidifier at the target power value for operation of the stack comprises:
determining a first partial pressure of water vapor at a dry side outlet of the humidifier based on the reference cathode inlet humidity value;
determining a third water vapor partial pressure of the wet side inlet of the humidifier based on the first water vapor partial pressure, a humidification performance parameter of the humidifier at the target power value for operation of the stack, a gas flow rate of the dry side of the humidifier, a total gas pressure of the dry side of the humidifier, and a second water vapor partial pressure of the dry side inlet of the humidifier;
the reference cathode outlet humidity value is determined based on the third partial pressure of water vapor.
4. The cathode purge time determination method according to claim 3, wherein the first water vapor partial pressure, the humidification performance parameter of a humidifier at which the stack is operated at the target power value, the gas flow rate of the humidifier dry side, the total gas pressure of the humidifier dry side, the second water vapor partial pressure of the humidifier dry side inlet, and the third water vapor partial pressure satisfy the following relationship:
A（P 3 -P 1 ）=Q（P 1 -P 2 ）/P Total (S) ；
Wherein A is a humidification performance parameter of a humidifier operated by the electric pile under the target power value, A is used for representing a diffusion rate of gas under a humidifier diaphragm with known area and thickness under a unit air pressure difference and a unit time, and the diffusion rate is used for representing the quantity of gas diffused in the unit time; p (P) 1 For the first water vapor partial pressure, P 2 For the second partial pressure of water vapor, P 3 Q is the gas flow rate of the dry side of the humidifier for the third partial pressure of water vapor, and Q is used for representing the gas mass flowing through the dry side of the humidifier in unit time; p (P) Total (S) Is the total air pressure on the dry side of the humidifier.
5. The cathode purge time determination method according to claim 2, wherein the reference cathode inlet humidity value and the reference cathode outlet humidity value satisfy a water balance model of the stack operating at the target power value, comprising:
obtaining the water content of the cathode inlet of the electric pile based on the humidity value of the reference cathode inlet;
determining the water content of the cathode outlet of the electric pile based on the water content of the cathode inlet of the electric pile, the water yield of the electric pile operated under a target power value and the water drainage of the anode outlet of the electric pile;
Determining a target humidity value of the cathode of the electric pile based on the water content of the outlet of the cathode of the electric pile;
and under the condition that the absolute value of the difference value between the target humidity value and the reference cathode outlet humidity value is smaller than a humidity threshold value, the reference cathode inlet humidity value and the reference cathode outlet humidity value meet a water balance model of the pile running at the target power value.
6. The cathode purge time determination method according to claim 1, wherein the instantaneous water loss rate, the instantaneous water content, and a target water content satisfy the following relationship:
；
wherein W is the target water content, W t For the instantaneous water content, V t For the instant water loss rate, t1 is the moment corresponding to the instant water content, t2 is the moment corresponding to the target water content, t2-t1 represents the residual purge time, and dt is used for representing unit time.
7. The cathode purge time determination method of claim 1, wherein the target water content is determined based on target operating parameters of the electrical stack, the target operating parameters including an ambient temperature at which the electrical stack is located, a planned downtime period of the electrical stack, and an estimated startup temperature of the electrical stack.
8. A cathode purge time determination apparatus, comprising:
the first processing module is used for controlling the electric pile to run for a target time length under a target power value under the condition that the electric pile receives a shutdown instruction, wherein the target power value is smaller than a power threshold value;
a second processing module for determining a first humidity value of gas entering the cathode of the stack at the target power value and a second humidity value of gas exiting the cathode of the stack;
the third processing module is used for determining the initial water content of the proton exchange membrane of the electric pile based on the first humidity value and the second humidity value;
the fourth processing module is used for controlling the galvanic pile to enter a shutdown process and starting shutdown purging of the cathode based on preset purging time calibrated in advance;
the fifth processing module is used for continuously determining the instant water loss rate and the instant water content of the proton exchange membrane based on the humidity of the gas entering the cathode of the electric pile during purging and the initial water content;
and a sixth processing module for redetermining a remaining purge time of the stack cathode based on the instantaneous water loss rate, the instantaneous water content, and a target water content.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the cathode purge time determination method of any one of claims 1 to 7 when executing the computer program.
10. A fuel cell comprising a stack, a humidifier, and the electronic device of claim 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1853299A (en) * | 2003-09-17 | 2006-10-25 | 通用汽车公司 | Fuel cell shutdown and startup using a cathode recycle loop |
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| CN116093378A (en) * | 2023-03-09 | 2023-05-09 | 中汽创智科技有限公司 | Fuel cell system and shutdown control method thereof |
| CN116230990A (en) * | 2022-12-28 | 2023-06-06 | 东方电气(成都)氢燃料电池科技有限公司 | Shutdown purging method, device and equipment for fuel cell system and storage medium |
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2023
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| CN1853299A (en) * | 2003-09-17 | 2006-10-25 | 通用汽车公司 | Fuel cell shutdown and startup using a cathode recycle loop |
| JP2007188829A (en) * | 2006-01-16 | 2007-07-26 | Nissan Motor Co Ltd | Fuel cell system |
| CN113839068A (en) * | 2021-09-29 | 2021-12-24 | 北京亿华通科技股份有限公司 | Shutdown purging method and device for fuel cell stack |
| CN114614048A (en) * | 2022-03-18 | 2022-06-10 | 苏州溯驭技术有限公司 | Hydrogen fuel cell purging system and anode fluctuating hydrogen pressure purging method thereof |
| CN116230990A (en) * | 2022-12-28 | 2023-06-06 | 东方电气(成都)氢燃料电池科技有限公司 | Shutdown purging method, device and equipment for fuel cell system and storage medium |
| CN116093378A (en) * | 2023-03-09 | 2023-05-09 | 中汽创智科技有限公司 | Fuel cell system and shutdown control method thereof |
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