CN112928310A - Control method and device for gas-liquid separator drain valve, fuel cell and vehicle - Google Patents
Control method and device for gas-liquid separator drain valve, fuel cell and vehicle Download PDFInfo
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- CN112928310A CN112928310A CN201911236173.2A CN201911236173A CN112928310A CN 112928310 A CN112928310 A CN 112928310A CN 201911236173 A CN201911236173 A CN 201911236173A CN 112928310 A CN112928310 A CN 112928310A
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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
- H01M8/04291—Arrangements for managing water in solid electrolyte fuel cell systems
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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
- H01M8/04432—Pressure differences, e.g. between anode and cathode
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The present disclosure provides a control method of a drain valve of a gas-liquid separator of a fuel cell, including: detecting a gas state of the process gas for the fuel cell below the gas-liquid separator; and controlling the opening and closing state of the drain valve of the gas-liquid separator according to the detection result of the gas state. The present disclosure also provides a control device of a drain valve of a gas-liquid separator of a fuel cell, including: a detection module that detects a gas state of the process gas for the fuel cell below the gas-liquid separator and outputs a detection result; and the drain valve switch module receives the detection result of the gas state and switches the drain valve according to the detection result. The present disclosure also relates to a fuel cell comprising: a gas-liquid separator provided downstream of an anode reactor of the fuel cell, capable of receiving and storing water produced by the anode reactor; and a gas-liquid separator drain valve provided below the gas-liquid separator and capable of discharging water stored in the gas-liquid separator.
Description
Technical Field
The present disclosure relates to a fuel cell for a vehicle and a vehicle equipped with the fuel cell, and more particularly, to a control method and a control device for a gas-liquid separator drain valve of a fuel cell.
Background
A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and is also called an electrochemical generator. The fuel cell is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation, and generally takes hydrogen, carbon, methanol, borohydride, coal gas or natural gas as fuel, as an anode/cathode, and oxygen in the air as a cathode/anode. It differs from a general battery mainly in that: the active material of a general battery is previously placed inside the battery, and thus the battery capacity depends on the amount of the active material, while the active material of a fuel cell is continuously supplied while reacting, and thus, such a battery is actually an energy conversion device. The fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through chemical reaction, and is not limited by the Carnot cycle effect, so the efficiency is extremely high. In addition, fuel and oxygen are used as raw materials for the fuel cell, and no mechanical transmission part is arranged, so that noise pollution is avoided, and the discharged harmful gas is very little. It follows that fuel cells are the most promising power generation technology from the viewpoint of energy conservation and ecological environment conservation.
Hydrogen-oxygen fuel cells are currently the most widely used fuel cells. Wherein hydrogen is supplied as a fuel and oxygen (air) is supplied as an oxidant to the anode and cathode of the membrane electrode assembly, respectively. The hydrogen supplied to the anode is decomposed into hydrogen ions (protons, H) by the action of the electrode layer catalyst formed on both sides of the electrolyte membrane+) And electrons (electrons, e)-) If the electrolyte solution is an alkali salt solution, the negative reaction formula on the external circuit of the hydrogen-oxygen fuel cell is as follows: 2H2+4OH—4e-＝4H2O; if the electrolyte is an acid solution, the reaction formula is: 2H2-4e-＝4H+When only hydrogen ions pass through the electrolyteAnd (3) a membrane. Due to the movement of the hydrogen ions, electrons flow through the external conductor and generate an electric current. On the other hand, the oxygen supplied to the cathode reacts with the hydrogen ions to generate water. The water produced by the reaction interferes with the flow of oxygen and hydrogen and therefore needs to be vented from the anode reactor. The hydrogen-oxygen fuel cell system is generally provided with a gas-liquid separator at the outlet of the anode reactor for draining water from the hydrogen gas at the outlet of the anode reactor of the hydrogen-oxygen fuel cell. The gas-liquid separator is for receiving and storing water, and generally has a water level sensor provided therein for sensing a water level in the gas-liquid separator, and a drain valve provided below the gas-liquid separator for discharging water from the gas-liquid separator when the sensed water level is higher than a set water level (threshold value).
When the hydrogen-oxygen fuel cell is operated, the water level in the gas-liquid separator at the outlet of the anode reactor of the fuel cell is continuously increased. Therefore, it is necessary to control the water level of the gas-liquid separator. Referring to the description figures 1 and 2, there is shown a control scheme for a prior art drain valve. Specifically, a water level sensor is installed on the gas-liquid separator, which can activate a drain valve (FDV) located below the gas-liquid separator to open it, thereby draining accumulated water in the gas-liquid separator.
It is relatively error prone if the control valve only receives feedback from the level sensor, for example, a jolt during movement of the vehicle may cause the level sensor to feed back a signal that the level is high, when the FDV is open, but in practice the level may not be high and it is not necessary to open the FDV. In addition, the opened FDV is maintained for at least a predetermined time. If the FDV is in an open state in a fault situation, this may lead to leakage of process-related gases (process gases of the fuel cell, such as hydrogen, oxygen), which affect the efficiency and safety of the system.
Disclosure of Invention
In view of at least one of the above-described drawbacks of the background art, the present disclosure provides a control method of a drain valve of a gas-liquid separator of a fuel cell, including: detection operation: detecting a gas state of a gas at an outlet of the fuel cell; and (3) executing the operation: and controlling the opening and closing state of the drain valve of the gas-liquid separator according to the detection result of the gas state.
According to the method disclosed by the invention, when the gas state is detected to belong to an abnormal state, the opening and closing state of the water discharge valve can be controlled, and the water discharge valve is mainly closed, so that fuel such as hydrogen can be prevented from leaking, and further potential safety hazards caused by fuel leakage can be eliminated.
In the above-described control method of the drain valve of the gas-liquid separator of the fuel cell, the detection of the gas state may be performed with a gas pressure sensor, and the gas state may be a pressure drop rate of the process gas detected by the gas pressure sensor.
Thus, since the pressure drop rate can reflect the gas leakage situation, it is possible to determine whether fuel, such as hydrogen, leaks based on the detection, thereby determining whether the drain valve is in a closed state, whether timely closing is required, and the like, and preventing the occurrence of safety problems due to fuel leakage.
Further, the method for controlling a drain valve of a gas-liquid separator of a fuel cell, which controls an open/close state of the drain valve of the gas-liquid separator based on a result of detection of the gas state, includes: and when the pressure drop rate exceeds a set threshold value, closing the water discharge valve of the gas-liquid separator.
Therefore, the drain valve of the gas-liquid separator can be closed in time, more process gas is prevented from leaking, and potential safety hazards caused by process gas leakage are eliminated.
Further, in the control method of the drain valve of the gas-liquid separator of the fuel cell, a water level sensor may be provided in the gas-liquid separator, and the water level in the gas-liquid separator may be detected by the water level sensor. And when the detected water level is higher than a set threshold value, opening the drain valve of the gas-liquid separator.
Therefore, after the drain valve is opened, redundant water in the gas-liquid separator can be discharged, so that the gas-liquid separator has enough space, and water generated by the anode reactor can be continuously collected and stored.
In the control method of the gas-liquid separator drain valve for the fuel cell, when the gas state exceeds a set threshold value, the gas-liquid separator drain valve may be forcibly closed regardless of the water level of the gas-liquid separator detected by the water level sensor.
By doing so, more of the process gas can be prevented from leaking, eliminating potential safety hazards.
Further, the control method of the gas-liquid separator drain valve of the fuel cell described above may further include: detecting a state of a fuel cell exhaust valve; interrupting the execution of the detecting operation and/or the executing operation when a fuel cell exhaust valve is open; resuming execution of the detecting operation and the executing operation when the fuel cell purge valve is closed.
Therefore, the drain valve is always in a controlled state and is opened only when needed, so that the operating efficiency of the fuel cell can be improved, and potential safety hazards are eliminated.
According to another aspect of the present disclosure, there is also provided a control apparatus of a discharge valve of a gas-liquid separator of a fuel cell, including: a detection module that detects a gas state of the process gas for the fuel cell below the gas-liquid separator and outputs a detection result; the drain valve switch module receives the detection result of the gas state; and when the detection result of the gas state exceeds a set threshold value, closing the drain valve of the gas-liquid separator.
In the control device of the drain valve of the gas-liquid separator of the fuel cell, the detection module can be a gas pressure sensor which can detect the pressure drop rate of the process gas of the fuel cell; the drain valve switch module is capable of receiving the pressure drop rate; the control device also comprises a gas-liquid separator water level sensor which is arranged in the gas-liquid separator and can detect the water level in the gas-liquid separator; the gas-liquid separator switch module can receive the water level detection result; and when the detected water level detection result exceeds a set threshold value, the drain valve is opened and discharges water in the gas-liquid separator.
By using the control device disclosed by the invention, the opening and closing state of the drain valve can be effectively controlled, so that the operation efficiency of the fuel cell is improved, fuel such as hydrogen is prevented from being leaked improperly through the drain valve, and the potential safety hazard caused by fuel leakage is eliminated.
Further, the present disclosure also provides a fuel cell including: a gas-liquid separator provided downstream of an anode reactor of the fuel cell, capable of receiving and storing water produced by the anode reactor; a gas-liquid separator drain valve connected to a lower portion of the gas-liquid separator and capable of discharging water stored in the gas-liquid separator; the control device of the drain valve of the gas-liquid separator of the fuel cell.
In addition, the present disclosure also proposes a vehicle with a fuel cell, which includes the fuel cell as described above.
Thus, in the fuel cell and the vehicle of the present disclosure described above, since the opening and closing of the drain valve can be effectively controlled, their working efficiency is improved, and an improper leakage of fuel such as hydrogen gas or the like through the drain valve is prevented, thereby preventing a safety problem caused by such leakage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, may be utilized. The exemplary embodiments of the present disclosure and their description are provided to explain the present disclosure and not to limit the present disclosure. In the drawings:
fig. 1 shows a schematic configuration of a fuel cell, which includes a gas-liquid separator drain valve (FDV).
Fig. 2 illustrates a method of controlling a drain valve (FDV) of the gas-liquid separator of the fuel cell of fig. 1.
Fig. 3A illustrates a control method and a control apparatus of a gas-liquid separator drain valve (FDV) according to an embodiment of the present disclosure.
Fig. 3B illustrates a control method and a control apparatus of a gas-liquid separator drain valve (FDV) according to another embodiment of the present disclosure.
Fig. 4 illustrates a work flow of a control method of a drain valve (FDV) of the gas-liquid separator of fig. 3.
Fig. 5 shows a work flow of another control method of a drain valve (FDV) of a gas-liquid separator according to the present invention.
Reference numerals:
201 water level sensor
203 fuel cell
205 gas-liquid separator
207 drainage valve
301 barometric sensor
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
The terms "control", "open", "close", and the like, as used in the present disclosure, are not specifically defined and limited, but should be interpreted broadly. The control mode can be direct control, opening and closing or indirect control, opening and closing. And the terms "upper", "somewhere", "downstream", "bottom", and the like, described in this disclosure indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are merely for the purpose of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first" and "second" are used in the context of description only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
Throughout the description of the present disclosure, it should be noted that unless otherwise specifically stated or limited, the terms "mounted" and "disposed" are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally attached, either mechanically, electrically or otherwise in communication with one another; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
The following detailed description of the present disclosure is provided in conjunction with the accompanying drawings and examples to enable a better understanding of the aspects of the present disclosure and its advantages in various aspects.
First embodiment
The embodiment relates to a control method of a drain valve of a gas-liquid separator of a fuel cell. The fuel cell in this embodiment is a hydrogen-oxygen fuel cell.
Referring to fig. 1, which is a schematic diagram of a fuel cell; referring to fig. 2, the control method and structure of the drain valve 207 of the gas-liquid separator 205 are shown in an enlarged manner. It can be seen that, during the operation of the fuel cell, water is generated in the anode reactor, so that a water outlet is disposed at the anode reactor side, and the water generated by the reaction is transported to the gas-liquid separator 205 through a water pipeline. The gas-liquid separator 205 functions to separate gas and liquid, that is, to separate water and hydrogen gas. The water is discharged through a lower drain valve 207 and the hydrogen is recycled.
As described in the background art, in the structure of the prior art, the hydrogen gas is liable to be undesirably leaked from the FDV, which is a safety hazard. Therefore, referring to fig. 3A, in the present embodiment, a gas pressure sensor 301 is provided in the control device of the discharge valve of the gas-liquid separator of the fuel cell for detecting whether there is leakage of hydrogen gas.
As shown in fig. 3A, in the present embodiment, a gas pressure sensor 301 is provided at the outlet of the fuel cell 203, which is capable of detecting the gas state of the hydrogen gas for the fuel cell 203.
As shown in fig. 3A, the drain valve control apparatus of the present embodiment includes a detection module (air pressure sensor) and a drain valve 207 opening and closing module. The gas pressure sensor 301 detects the pressure drop rate of the hydrogen gas at the outlet of the fuel cell; the switch module can execute an instruction for opening or closing the drain valve of the gas-liquid separator.
Note that, in the case where no instruction is obtained, the gas-liquid separator drain valve (FDV) is normally in a closed state. A control method for controlling the drain valve of the gas-liquid separator by the above-described control device will be described below.
Referring to fig. 4, in the present embodiment, the control method of the drain valve of the gas-liquid separator of the fuel cell is implemented by using the control device of the drain valve of the gas-liquid separator of the fuel cell shown in fig. 3.
The method for controlling the drain valve of the gas-liquid separator of the fuel cell in the embodiment sequentially comprises the following steps: first, a detecting operation of detecting a pressure drop rate (d (p)/dt) of hydrogen gas by a detecting means such as the gas pressure sensor 301. Then, it is determined whether the gas pressure drop rate is above a threshold.
The pressure threshold is a function of the pressure at the hydrogen inlet and the stack operating current, the function being a value provided by the stack manufacturer. The threshold is the safest value obtained from a large amount of experimental data and computer simulation, and is preset in the control device for comparing real-time hydrogen pressure drop data.
Next, an operation is performed, in which when it is determined that the pressure drop rate is higher than the threshold value, it is interpreted that gas leakage occurs, and at this time, the control device outputs a control signal to a drain valve switching module, which performs a forced closing instruction on the gas-liquid separator drain valve. In another case, when the determined pressure drop rate is not higher than the set threshold, it indicates that the gas circulates in the relatively closed pipeline, at this time, the detection module does not output a signal to the control device, the drain valve switching module does not work, and the drain valve switching module does not execute a command to a drain valve (FDV) of the gas-liquid separator.
In addition, when the fuel cell is in the working state, the drain valve is controlled by the detection module and the control device in real time, but when the fuel cell is in the non-working state, the drain valve keeps the closing state.
In this embodiment, because the gas pressure sensor 301 is provided, when a problem (for example, hydrogen leakage) occurs in the gas, the gas pressure sensor can detect the gas in time, and can close the drain valve of the gas-liquid separator in time according to the detection result, so as to prevent the fuel cell process gas from leaking in a large amount, thereby preventing a safety accident.
Second embodiment
The embodiment relates to a method for controlling a discharge valve of a gas-liquid separator of an oxyhydrogen fuel cell for an automobile and a control device of the discharge valve of the gas-liquid separator of the fuel cell.
As described in the background of the invention and shown in fig. 2, there is a prior art fuel cell gas-liquid separator drain valve control method and control apparatus, wherein 201 is a water level sensor.
Fig. 3B illustrates a control method and a control apparatus of a drain valve (FDV) of a gas-liquid separator according to another embodiment of the present disclosure.
As shown in fig. 3B, according to an example embodiment of the present disclosure, the gas pressure sensor 301 may also be disposed at a downstream portion of the gas-liquid separator gas passage, detecting a gas pressure drop rate.
Referring to fig. 1 and 3B, in the method of the present embodiment, further comprising detecting a state of a fuel cell purge valve; interrupting the execution of the detecting operation and/or the executing operation when the fuel cell exhaust valve is open; when the fuel cell exhaust valve is closed, execution of the detecting operation and execution of the operation are resumed. This is because there is a pressure drop when the FPV opens on the hydrogen recycle line, releasing hydrogen. This pressure drop is independent of hydrogen leakage, so the controller should not take this pressure drop into account to control the purge valve.
The control method of the gas-liquid separator drain valve of the hydrogen-oxygen fuel cell for the automobile in the present embodiment will be described in detail with reference to fig. 3B and 5.
Referring to fig. 5, the operation of the discharge valve of the gas-liquid separator of the fuel cell is shown. It can be seen that the present embodiment provides a control method for controlling the discharge valve of the gas-liquid separator together with the pressure sensor and the water level sensor.
As in the first embodiment, when the fuel cell is operated, the gas pressure sensor 301 first detects the gas state at the outlet of the fuel cell. Here, the data detected is the pressure drop rate (d (p)/dt) of the gas.
Then, the control device judges whether the detected pressure drop rate of the hydrogen gas is higher than a set threshold value. As in the first embodiment, the threshold value is obtained by an engineer through experimental calculation and data simulation. When the control device judges that the pressure drop rate of the hydrogen is in a normal range and is not higher than the threshold value, the detection module outputs a signal to the control device. The pressure threshold is a function of the pressure at the hydrogen inlet and the stack current.
Then, the control device receives a detection signal of the water level sensor. And when the water level sensor detects that the water level is higher than the set threshold value, the FDV is started. When the water level sensor detects that the water level is not higher than the set threshold, the FDV maintains the closed state.
Referring to fig. 5, a second situation that may occur in the present embodiment is: when the control device judges that the pressure drop rate of the hydrogen is higher than the threshold value, the control device outputs a signal to the drain valve switch module, and at the moment, the drain valve switch module executes an instruction of forcibly closing the FDV, and is not interfered by other signals, including detection signals of the water level sensor.
In this embodiment, the pressure sensor 301 continuously collects a hydrogen pressure drop rate signal. If the detected pressure drop rate falls within the normal range, the air pressure sensor 301 outputs a signal to the control means, and then the control means further receives a detection signal of the water level sensor to control the opening and closing of the FDV based on the detection signal. And if the detected pressure drop rate is higher than the set threshold value, the control device directly forces the drain valve switch module to close the drain valve without considering the signal of the water level sensor. In the whole working process of the fuel cell, the detection module (comprising the air pressure sensor and the water level sensor) continuously works, detects the gas pressure drop rate and the water level of the gas-liquid separator at any time, and outputs signals at any time to ensure that gas cannot leak; and ensure that the gas-liquid separator has enough water storage space.
Of course, when the fuel cell is in an operating state, that is, when the fuel cell switch FC is in an open state, the drain valve is controlled by the detection module and the control device, but when the FC switch is in a closed state, the fuel cell is not operated, and the drain valve is kept in the closed state.
As described above, in the present embodiment, the pressure decay rate of the process gas at the anode outlet is continuously monitored. When the pressure drop rate exceeds a threshold value, a gas leakage problem during circulation is indicated. If the air pressure sensor 301 does not detect, the drain valve control apparatus only receives a signal from the water level sensor, and at this time, if the water level sensor transmits a high water level signal, the control apparatus opens the FDV, which causes more gas leakage. In this case, even though the FDV is not required to be closed according to the detection result of the water level sensor, the FDV should be forcibly closed. Therefore, the present disclosure can timely turn off the FDV in this case due to the provision of the gas pressure sensor, thereby preventing the loss of the process gas and improving the efficiency and safety of the hydrogen-oxygen fuel cell.
The control method and the control device for the drain valve of the gas-liquid separator of the fuel cell according to the above embodiments can be widely applied to the fuel cell of an electric vehicle, namely, a fuel cell called a proton exchange membrane. The battery uses pure hydrogen as fuel and air as oxidant, and is not subjected to heat engine process and is not limited by heat cycle, and the generated electric energy can drive the motor to work, and the motor drives the mechanical transmission structure of the automobile.
When the fuel cell is used for driving a vehicle, a fuel cell vehicle can be provided. Compared with the conventional automobile, the fuel cell automobile is different in structure and power transmission, and new requirements are provided for the overall design of the automobile. The engine transmission power assembly of the traditional internal combustion engine automobile does not exist in the fuel automobile, and is replaced by a fuel cell reactor, a storage battery, a hydrogen tank, an electric motor, a DC/DC converter and other devices. Therefore, the fuel cell vehicle has advantages in environmental protection that the conventional vehicle does not have.
Finally, it should be noted that: although the present disclosure has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A control method for a drain valve of a gas-liquid separator of a fuel cell, comprising:
detection operation: detecting a gas state of a gas at an outlet of the fuel cell;
and (3) executing the operation: and controlling the opening and closing state of the drain valve of the gas-liquid separator according to the detection result of the gas state.
2. The control method of claim 1, wherein the detection of the gas condition is performed with a gas pressure sensor, the gas condition being a pressure drop rate of the process gas detected by the gas pressure sensor.
3. The control method according to claim 2, wherein the controlling the open-close state of the gas-liquid separator discharge valve based on the detection result of the gas state includes:
and when the pressure drop rate exceeds a set threshold value, closing the drain valve of the gas-liquid separator.
4. The control method according to claim 3, characterized in that a water level sensor is further provided in the gas-liquid separator, which detects a water level in the gas-liquid separator, and the gas-liquid separator drain valve is opened when the detected water level is higher than a set threshold value.
5. The control method according to claim 4, characterized in that, when the gas state exceeds a set threshold value, the gas-liquid separator drain valve is forcibly closed regardless of the water level of the gas-liquid separator detected by the water level sensor.
6. The control method according to claim 2, characterized by further comprising:
detecting a state of a fuel cell exhaust valve;
interrupting the execution of the detecting operation and/or the executing operation when a fuel cell exhaust valve is open;
resuming execution of the detecting operation and the executing operation when the fuel cell purge valve is closed.
7. A control device of a discharge valve of a gas-liquid separator for a fuel cell, characterized by comprising:
a detection module that detects a gas state of the process gas for the fuel cell downstream of the gas-liquid separator and outputs a detection result;
the drain valve switch module receives the detection result of the gas state; and when the detection result of the gas state exceeds a set threshold value, closing the drain valve of the gas-liquid separator.
8. The control device according to claim 7,
the detection module is a gas pressure sensor capable of detecting a pressure drop rate of the fuel cell process gas; the drain valve switch module is capable of receiving the pressure drop rate;
the control device also comprises a gas-liquid separator water level sensor which is arranged in the gas-liquid separator and can detect the water level in the gas-liquid separator; the gas-liquid separator switch module can receive the water level detection result; and when the detected water level detection result exceeds a set threshold value, the drain valve is opened and discharges water in the gas-liquid separator.
9. A fuel cell, comprising:
a gas-liquid separator provided downstream of an anode reactor of the fuel cell, capable of receiving and storing water produced by the anode reactor;
a gas-liquid separator drain valve connected below the gas-liquid separator and capable of discharging water stored in the gas-liquid separator;
the control device for the discharge valve of the gas-liquid separator of the fuel cell according to claim 7 or 8.
10. A vehicle with a fuel cell comprising the fuel cell of claim 9.
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| CN201911236173.2A CN112928310B (en) | 2019-12-05 | 2019-12-05 | Control method and device for gas-liquid separator drain valve, fuel cell and vehicle |
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| CN114243058A (en) * | 2021-11-08 | 2022-03-25 | 东风汽车集团股份有限公司 | Fuel cell system, and gas-liquid separation device, control method, and control device for fuel cell system |
| CN114388856A (en) * | 2022-01-17 | 2022-04-22 | 潍柴动力股份有限公司 | Control method, device, equipment and medium for tail exhaust valve of fuel cell system |
| CN114784329A (en) * | 2022-06-20 | 2022-07-22 | 武汉众宇动力系统科技有限公司 | Fuel cell hydrogen circulation system, gas-water separator thereof and water and hydrogen discharging method |
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