CN111106369A - Impurity removing method, impurity removing device and impurity removing system for fuel cell - Google Patents
Impurity removing method, impurity removing device and impurity removing system for fuel cell Download PDFInfo
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- CN111106369A CN111106369A CN201911286388.5A CN201911286388A CN111106369A CN 111106369 A CN111106369 A CN 111106369A CN 201911286388 A CN201911286388 A CN 201911286388A CN 111106369 A CN111106369 A CN 111106369A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04335—Temperature; Ambient temperature of cathode reactants at the inlet or inside the fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04395—Pressure; Ambient pressure; Flow of cathode reactants at the inlet or inside the fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell impurity removing method, an impurity removing device and an impurity removing system. The impurity removing method of the fuel cell of the present invention includes the steps of: acquiring a front temperature value and a rear temperature value and a pressure value of an air path; calculating according to the temperature value and the pressure value before and after the air path to obtain the current impurity content of the hydrogen path; and controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content. According to the impurity removing method of the fuel cell, the hydrogen removing valve is controlled to be opened according to the condition that the current impurity content of the hydrogen gas path is larger than the preset impurity content, the current impurity content is obtained through calculation of the front and rear temperature pressure values of the air path, instrument detection is not needed, cost is saved, and environmental adaptability is enhanced; the efficiency and the service life of the battery are ensured by realizing the periodic discharge of impurities in the hydrogen gas path through the control of the hydrogen discharge valve.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell impurity removing method, an impurity removing device and an impurity removing system.
Background
In the reaction process of the proton exchange membrane fuel cell, part of impurities (mainly nitrogen) in the air permeate to a hydrogen path through the proton exchange membrane. Excessive impurity storage in the hydrogen path can severely affect the reaction rate of the fuel cell and thus the efficiency. At the same time, excessive impurities may reduce the life of the fuel cell. Therefore, a design strategy is required to discharge impurities in the hydrogen gas path.
Disclosure of Invention
The invention aims to at least solve the problem that excessive impurity storage in the existing hydrogen gas path seriously affects the reaction rate of a fuel cell and reduces the service life of the fuel cell. The purpose is realized by the following technical scheme:
a first aspect of the present invention proposes a method of removing impurities of a fuel cell, wherein the method comprises the steps of:
acquiring a front temperature value and a rear temperature value and a pressure value of an air path;
calculating according to the temperature value and the pressure value before and after the air path to obtain the current impurity content of the hydrogen path;
and controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
According to the impurity removing method of the fuel cell, the hydrogen removing valve is controlled to be opened according to the condition that the current impurity content of the hydrogen gas path is larger than the preset impurity content, the current impurity content is obtained through calculation of the front temperature pressure value and the rear temperature pressure value of the air path, instrument detection is not needed, cost is saved, and environmental adaptability is enhanced; the efficiency and the service life of the battery are ensured by realizing the periodic discharge of impurities in the hydrogen gas path through the control of the hydrogen discharge valve.
In addition, the impurity removing method of the fuel cell according to the present invention may have the following additional technical features:
in some embodiments of the present invention, the obtaining the current impurity content of the hydrogen gas path according to the temperature value and the pressure value before and after the air path includes:
obtaining the air flow of the air circuit entering the galvanic pile and the outlet of the galvanic pile according to the front and rear temperature values and the pressure values of the air circuit;
and obtaining the current impurity content of the hydrogen gas circuit according to the air flow entering the galvanic pile and the air flow at the outlet of the galvanic pile.
In some embodiments of the present invention, the current impurity content of the hydrogen gas path is:
the amount of air reduced after passing through the stack minus the amount of oxygen consumed plus the amount of water produced at the cathode during the reaction.
In some embodiments of the invention, the amount of oxygen is obtained from the number of fuel cells, the current density of the fuel cells and the active area of the fuel cells.
In some embodiments of the present invention, the amount of water generated at the cathode during the reaction is obtained by the number of fuel cells and the effective area of the fuel cells.
In some embodiments of the present invention, the controlling the opening of the hydrogen discharge valve according to the current impurity content of the hydrogen gas path being greater than the preset impurity content includes:
controlling a hydrogen discharge valve to open for a first preset time value according to the fact that the current impurity content of a hydrogen gas circuit is larger than a first preset impurity content;
and controlling the hydrogen discharge valve to open a second preset time value according to the fact that the current impurity content of the hydrogen gas circuit is larger than a second preset impurity content.
In some embodiments of the present invention, before acquiring the before-after temperature value and the pressure value of the air path, the method further includes:
and when the fuel cell is in emergency shutdown, the hydrogen discharge valve is controlled to be opened for a third preset time and then closed.
In another aspect of the present invention, a fuel cell impurity removing device is provided, where the fuel cell impurity removing device is used for executing the above fuel cell impurity removing method, and the impurity removing device includes: the hydrogen control system comprises an acquisition unit, a calculation unit and a hydrogen discharge valve control unit, wherein:
the acquisition unit is used for acquiring the front and rear temperature values and the pressure values of the air circuit;
the calculation unit is used for calculating and obtaining the current impurity content of the hydrogen gas circuit according to the temperature value and the pressure value before and after the air circuit;
and the hydrogen discharge valve control unit is used for controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
The invention also provides a fuel cell impurity removing system, which comprises a memory and the above fuel cell impurity removing device, wherein the memory stores the instruction of the above fuel cell impurity removing method;
the air path is characterized by further comprising an air path, and a temperature sensor and a pressure sensor are respectively arranged at an inlet and an outlet of the air path.
In some embodiments of the present invention, the impurity discharging system of the fuel cell further includes a hydrogen gas path, a gas-water separator and a check valve are disposed on the hydrogen gas path, and a hydrogen discharging valve is disposed between the gas-water separator and the check valve.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings.
In the drawings:
fig. 1 schematically shows a flowchart of a method of purging a fuel cell according to an embodiment of the invention;
fig. 2 schematically shows a logic control block diagram of a purge method of a fuel cell according to an embodiment of the invention;
fig. 3 schematically shows a block diagram of a configuration of a purge device of a fuel cell according to an embodiment of the present invention.
1: an acquisition unit; 2: a calculation unit; 3: a hydrogen discharge valve control unit.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 and 2, the method of removing impurities of a fuel cell in the present embodiment includes the steps of:
s1, acquiring the front and rear temperature values and the pressure values of the air circuit;
s2, calculating according to the front and rear temperature values and the pressure values of the air path to obtain the current impurity content of the hydrogen path;
and S3, controlling the hydrogen discharge valve to be opened according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
The current impurity content is obtained before the influence of the impurity content on the efficiency of the galvanic pile through the calculation of the front and rear temperature pressure values of the air circuit, so that the detection of an instrument is not needed, the cost is saved, and the environmental adaptability is enhanced; the efficiency and the service life of the battery are ensured by realizing the periodic discharge of impurities in the hydrogen gas path through the control of the hydrogen discharge valve.
In some embodiments of the present invention, obtaining the current impurity content of the hydrogen gas path according to the pre-and post-air temperature value and the pressure value comprises:
obtaining the air flow of the air circuit entering the galvanic pile and the outlet of the galvanic pile according to the front and rear temperature values and the pressure values of the air circuit;
and obtaining the current impurity content of the hydrogen gas circuit according to the air flow entering the galvanic pile and the air flow at the outlet of the galvanic pile.
When a venturi tube is adopted, the formula is as follows:
wherein Qm is the mass flow rate, the mass of the exhaust gas passing through the venturi tube in unit time, in kg/s, C is the outflow coefficient, which represents the coefficient of the relationship between the actual flow rate passing through the device and the theoretical flow rate, β is the ratio of the diameter, the diameter of the throat of the venturi tube to the diameter of the inlet;ε is the coefficient of expansion, which is determined by the following equation, taking into account the coefficients used for the compressibility of the exhaust gas:
d is the diameter of the throat of the Venturi tube in m; Δ p is the static pressure difference measured at the inlet and throat of the venturi tube, and the signal is provided by HCM differential pressure sensor measurement in Pa; ρ is the density of the exhaust gas flowing through the inlet of the venturi, determined by the following equation in kg/m 3:
p1 is the absolute static pressure measured at the inlet of the Venturi tube, the signal is provided by an EBP exhaust pressure sensor, the unit Pa is R is an exhaust gas constant which changes along with the change of the working condition of the engine, the calculation is carried out according to 287J/(Kg.K), T is the inlet temperature, the Kelvin temperature measured at the inlet of the Venturi tube is measured by an EGR temperature sensor, the unit is that the measured signal needs to be shifted by 273K in the ECU, the unit K is shifted, к is an isentropic index which is related to the gas property (according to the empirical value of the engine), tau is a pressure ratio, the ratio of the absolute static pressure at the throat of the Venturi tube to the absolute static pressure at the inlet is calculated, the ratio of the ratio is between 0.4 and 0.7, the flow speed is within a reasonable range, namely, the sound speed cannot be exceeded, the blockage phenomenon is prevented, and the:
wherein A denotes the flow area in m2. When a common pipeline is adopted, the flow rate needs to be obtained by adopting a table look-up mode.
In some embodiments of the invention, the current impurity content of the hydrogen gas path is:
the amount of air reduced after passing through the stack minus the amount of oxygen consumed plus the amount of water produced at the cathode during the reaction.
In some embodiments of the invention, the amount of oxygen is obtained from the number of fuel cells, the current density of the fuel cells, and the active area of the fuel cells.
When the fuel cell works in a normal mode, the oxygen consumed by the electric pile in unit time can be obtained by calculating according to the output current of the electric pile through a formula:
The pem fuel cell produces water at the cathode during the reaction, so the calculation takes into account the water content:
The total air flow entering the air path can be measured by the mass flow meter at the inlet of the air path, and the air flow rate at the inlet of the galvanic pile can be calculated according to the temperature and the pressure of the air at the inlet of the galvanic pile measured by the temperature and pressure sensor at the inlet of the galvanic pile and an ideal gas state equation:
P×dV＝dm×RT
the loss of air flow rate through the stack is related to the stack internal structure, and a certain ratio can be determined by calibration:
vout-vin×C
according to the temperature and the pressure of the air at the outlet of the galvanic pile measured by a temperature and pressure sensor at the outlet of the galvanic pile and the calculated outlet air flow rate, the air mass flow at the outlet of the galvanic pile can be calculated according to the ideal gas state equation; and subtracting the mass flow at the outlet of the galvanic pile from the mass flow at the inlet of the galvanic pile to obtain the reduced air volume after passing through the galvanic pile in unit time.
Finally, the oxygen consumption O is subtracted from the air quantity M reduced after passing through the galvanic pile in unit time2usedPlus water H produced at the cathode during the reaction2OoutThe amount of the impurity can obtain the content M of the impurity permeating into a hydrogen path in unit timei。
Mi＝M-O2used+H2Oout
For the content M of impurities permeating into the hydrogen path in unit timeiPerforming integration to obtain the content of impurities in the current hydrogen gas path in the operation process of the fuel cell; meanwhile, after each impurity removal, the integral value is cleared and then is integrated again, and the impurity change condition in operation can be obtained.
In some embodiments of the present invention, the amount of water produced at the cathode during the reaction is obtained by the number of fuel cells and the effective area of the fuel cells.
In some embodiments of the present invention, controlling the opening of the hydrogen discharge valve according to the current impurity content of the hydrogen path being greater than the preset impurity content comprises:
controlling a hydrogen discharge valve to open for a first preset time value according to the fact that the current impurity content of a hydrogen gas circuit is larger than a first preset impurity content;
and controlling the hydrogen discharge valve to open a second preset time value according to the fact that the current impurity content of the hydrogen gas circuit is larger than a second preset impurity content.
When certain impurities exist in the hydrogen gas path, the hydrogen discharge valve is opened for a period of time T1(according toThe calculated impurity content of the hydrogen path before shutdown is obtained by table lookup) and then is closed, and then the shutdown is normally performed. When the impurity content in the hydrogen path exceeds a certain limit value, the hydrogen discharge valve is opened for a period of time T0And (obtained by checking MAP according to the target power and the output power of the fuel cell) and then closing, and clearing the impurity integral.
In some embodiments of the present invention, before acquiring the before-after temperature value and the pressure value of the air path, the method further includes:
and when the fuel cell is in emergency shutdown, the hydrogen discharge valve is controlled to be opened for a third preset time and then closed.
When the emergency shutdown is carried out, impurities in a hydrogen path need to be swept as soon as possible, and the problems of hydrogen loss and influence on control do not need to be considered, so that the hydrogen exhaust valve is directly opened for a period of time (can be calibrated according to different fuel cells) during the emergency shutdown, then the hydrogen exhaust valve is closed, the DCDC is disconnected, and the emergency shutdown is carried out.
As shown in fig. 3, another aspect of the present invention also provides a fuel cell impurity removal device, wherein the fuel cell impurity removal device is used for executing the above fuel cell impurity removal method, and the impurity removal device comprises: an acquisition unit 1, a calculation unit 2, and a hydrogen discharge valve control unit 3, wherein:
the device comprises an acquisition unit 1, a temperature sensor, a pressure sensor and a control unit, wherein the acquisition unit 1 is used for acquiring a front temperature value and a rear temperature value and a pressure value of an air circuit;
the calculation unit 2 is used for calculating and obtaining the current impurity content of the hydrogen gas circuit according to the temperature value and the pressure value before and after the air circuit;
and the hydrogen discharge valve control unit 3 is used for controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
The invention also provides a fuel cell impurity removing system, which comprises a memory and the impurity removing device of the fuel cell, wherein the memory stores instructions of the impurity removing method of the fuel cell;
the air-conditioning system also comprises an air path, wherein a temperature sensor and a pressure sensor are respectively arranged at the inlet and the outlet of the air path.
In some embodiments of the present invention, the impurity discharging system of the fuel cell further includes a hydrogen path, a gas-water separator and a check valve are disposed on the hydrogen path, and a hydrogen discharging valve is disposed between the gas-water separator and the check valve.
In the impurity removing method of the fuel cell, the air flow entering the electric pile and the electric pile outlet of the air passage is calculated according to the front and back temperature pressure values of the air passage, so that the reduced mass of the air after passing through the electric pile is obtained; meanwhile, the amount of the oxygen which is reacted is calculated by the power emitted by the galvanic pile; the amount of oxygen reacted off is subtracted from the total air reduction to obtain the amount of impurities permeated.
In summary, in the impurity removing method of the fuel cell, the hydrogen removing valve is controlled to be opened according to the condition that the current impurity content of the hydrogen gas path is greater than the preset impurity content, the current impurity content is obtained through calculation of the front and rear temperature pressure values of the air path, instrument detection is not needed, cost is saved, and environmental adaptability is enhanced; the efficiency and the service life of the battery are ensured by realizing the periodic discharge of impurities in the hydrogen gas path through the control of the hydrogen discharge valve.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of purging a fuel cell, the method comprising the steps of:
acquiring a front temperature value and a rear temperature value and a pressure value of an air path;
calculating according to the temperature value and the pressure value before and after the air path to obtain the current impurity content of the hydrogen path;
and controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
2. The method of claim 1, wherein the obtaining the current impurity content of the hydrogen gas path according to the temperature value and the pressure value before and after the air path comprises:
obtaining the air flow of the air circuit entering the galvanic pile and the outlet of the galvanic pile according to the front and rear temperature values and the pressure values of the air circuit;
and obtaining the current impurity content of the hydrogen gas circuit according to the air flow entering the galvanic pile and the air flow at the outlet of the galvanic pile.
3. The method of purging a fuel cell according to claim 2, wherein the current impurity content of the hydrogen path is:
the amount of air reduced after passing through the stack minus the amount of oxygen consumed plus the amount of water produced at the cathode during the reaction.
4. The method of purging a fuel cell according to claim 3, wherein the amount of oxygen is obtained by the number of fuel cells, a current density of the fuel cells, and an effective area of the fuel cells.
5. The method for purging a fuel cell according to claim 3, wherein the amount of water produced at the cathode during the reaction is obtained by the number of fuel cells and an effective area of the fuel cells.
6. The impurity removing method of the fuel cell according to claim 1, wherein the controlling of the opening of the hydrogen discharge valve according to the current impurity content of the hydrogen path being greater than a preset impurity content comprises:
controlling a hydrogen discharge valve to open for a first preset time value according to the fact that the current impurity content of a hydrogen gas circuit is larger than a first preset impurity content;
and controlling the hydrogen discharge valve to open a second preset time value according to the fact that the current impurity content of the hydrogen gas circuit is larger than a second preset impurity content.
7. The method of claim 1, wherein the obtaining the pre-post temperature value and the post-post pressure value of the air path further comprises:
and when the fuel cell is in emergency shutdown, the hydrogen discharge valve is controlled to be opened for a third preset time and then closed.
8. A fuel cell impurity removal device for performing the fuel cell impurity removal method according to claim 1, the impurity removal device comprising: the hydrogen control system comprises an acquisition unit, a calculation unit and a hydrogen discharge valve control unit, wherein:
the acquisition unit is used for acquiring the front and rear temperature values and the pressure values of the air circuit;
the calculation unit is used for calculating and obtaining the current impurity content of the hydrogen gas circuit according to the temperature value and the pressure value before and after the air circuit;
and the hydrogen discharge valve control unit is used for controlling the opening of the hydrogen discharge valve according to the condition that the current impurity content of the hydrogen gas circuit is greater than the preset impurity content.
9. A fuel cell purging system comprising a memory and the fuel cell purging device of claim 8, the memory having stored therein instructions of the fuel cell purging method of any one of claims 1 to 7;
the air path is characterized by further comprising an air path, and a temperature sensor and a pressure sensor are respectively arranged at an inlet and an outlet of the air path.
10. The fuel cell impurity removing system according to claim 9, further comprising a hydrogen gas path, wherein a gas-water separator and a check valve are disposed on the hydrogen gas path, and a hydrogen removing valve is disposed between the gas-water separator and the check valve.
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| CN111864233A (en) * | 2020-08-03 | 2020-10-30 | 上海重塑能源科技有限公司 | Hydrogen purity detection device of hydrogen supply system |
| CN112952154A (en) * | 2021-01-29 | 2021-06-11 | 上海捷氢科技有限公司 | Hydrogen cavity gas replacement control method of fuel cell and hydrogen cavity replacement system thereof |
| CN115133080A (en) * | 2022-07-08 | 2022-09-30 | 中汽创智科技有限公司 | Fuel cell control method and device |
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