CN116799242A - Hydrogen reflux control method, system and storage medium thereof - Google Patents
Hydrogen reflux control method, system and storage medium thereof Download PDFInfo
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- CN116799242A CN116799242A CN202310249426.XA CN202310249426A CN116799242A CN 116799242 A CN116799242 A CN 116799242A CN 202310249426 A CN202310249426 A CN 202310249426A CN 116799242 A CN116799242 A CN 116799242A
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- hydrogen
- fuel cell
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- temperature
- rotating speed
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000001257 hydrogen Substances 0.000 title claims abstract description 101
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010992 reflux Methods 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 6
- 238000004590 computer program Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- Fuel Cell (AREA)
Abstract
The invention provides a hydrogen reflux control method, a system and a storage medium thereof, wherein the hydrogen reflux control method comprises the following steps: starting the fuel cell; controlling the vortex pump to rotate to heat the anode side of the fuel cell to a second target temperature through the heated hydrogen, and stopping heating the stack inlet and the hydrogen pressure cavity; controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range; shutting down the fuel cell; controlling the hydrogen pressure to be at the lowest value of the target pressure range; controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode; the circulation pump is stopped from rotating. Controlling hydrogen reflux and the wall of the hydrogen inlet to a target temperature 70T1 by controlling a hydrogen inlet heater; the swirl pump is simultaneously controlled to rotate after the fuel cell system start-up command is enabled. The anode side of the fuel cell is heated by the hot hydrogen gas and melts the ice on the surface of the fuel cell.
Description
Technical Field
The present invention relates to the field of fuel cells, and in particular, to a hydrogen gas backflow control method, system, and storage medium thereof.
Background
In the operation process of the fuel cell system, hydrogen and oxygen can react to generate water, a large amount of water is generated at a cathode, and the water reversely permeates to an anode, the water at the cathode side can be discharged along with the compressed excessive high-pressure high-temperature air, and the hydrogen at the anode side can be wasted if the hydrogen is discharged excessively; the existing solution is to add a hydrogen reflux pump to allow excessive hydrogen to flow back to the hydrogen inlet, so that not only can the water measured by the anode be discharged, but also the hydrogen utilization rate can be improved.
Because the operation environment is wet, the existing hydrogen reflux device needs to consider ice breaking in low-temperature environment to successfully start at low temperature. In addition, in a low-temperature environment, saturated high-temperature wet gas at the outlet of the battery is cooled and condensed after being returned by the circulating pump, and then flows back to the inlet of the electric pile, so that single cells at the inlet are condensed. After the ambient temperature is lower than zero, once the hydrogen circulating pump is blocked by ice, water on the anode side of the fuel cell can quickly freeze to damage the membrane electrode of the fuel cell, so that irreversible damage is caused.
In view of this, the present invention has been made.
Disclosure of Invention
The invention provides a hydrogen reflux control method, a system and a storage medium thereof, which are used for solving the technical problems in the prior art.
The first aspect of the invention provides a hydrogen reflux control method, comprising the following steps:
starting the fuel cell;
controlling the vortex pump to rotate so as to heat the anode side of the fuel cell to a second target temperature, and stopping heating the stack inlet and the hydrogen pressure cavity;
controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range;
shutting down the fuel cell;
controlling the hydrogen pressure to be at the lowest value of the target pressure range;
controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode;
the circulation pump is stopped from rotating.
In the low-temperature cold start process, firstly preheating the hydrogen in the hydrogen medium-pressure cavity to a target temperature T1 according to a medium-pressure temperature sensor, and closing a heater when the temperature is greater than T1; simultaneously controlling a hydrogen inlet heater to control hydrogen backflow and controlling the pipe wall of the hydrogen inlet to reach a target temperature 70T1; when the start command of the fuel cell system is enabled, closing a loop to control the opening of a hydrogen proportional valve according to the hydrogen inlet stack pressure sensor 7 so as to enable the hydrogen inlet pressure to reach P1; while controlling the rotation of the swirl pump. This process heats the anode side of the fuel cell with hot hydrogen and melts the ice on the surface of the fuel cell. After the temperature sensor returns to T2, the heating in the anode cavity is successful, and the normal operation of the fuel cell can be realized.
In a further scheme of the invention, the preset temperature range is T5-T5+1, and the T5 is obtained according to the following formula:
X×T5＝(X-1)T4+T3
wherein X is a target hydrogen metering ratio; x-1 is hydrogen reflux ratio; t3 is the operating temperature of the galvanic pile; t4 is the hydrogen temperature of the medium pressure chamber.
In a further aspect of the present invention, before the starting of the fuel cell, the method further includes the steps of:
acquiring the temperature of a hydrogen medium-pressure cavity and an electric pile inlet;
the PTC indirectly heats the stack inlet to T1 through the metal structure, and simultaneously heats the temperature of the hydrogen pressure cavity to T2;
controlling the hydrogen pressure to be in a target pressure range;
and the heating of the pile inlet and the hydrogen pressure cavity is stopped by stopping the PTC pair and indirectly heating the pile inlet and the hydrogen pressure cavity through the metal structure.
In a further aspect of the present invention, the accumulating the rotational speed of the circulating pump until the stacking temperature reaches the preset temperature range specifically includes:
when the stacking temperature is lower than the preset temperature range, accumulating the rotating speed of the circulating pump;
when the stacking temperature is higher than the preset temperature range, reducing the rotating speed of the circulating pump;
and when the stacking temperature is in a preset temperature range, maintaining the rotating speed of the circulating pump.
The second aspect of the present invention provides a hydrogen reflux control system, comprising:
the acquisition unit is used for acquiring the temperature and the pressure of each position in the fuel cell;
a control unit configured to:
controlling the vortex pump to rotate so as to heat the anode side of the fuel cell to a second target temperature, and stopping heating the stack inlet and the hydrogen pressure cavity;
controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range;
shutting down the fuel cell;
controlling the hydrogen pressure to be at the lowest value of the target pressure range;
controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode;
the circulation pump is stopped from rotating.
A third aspect of the present invention provides a storage medium storing a computer program, wherein the computer program, when executed by a processor, implements a hydrogen gas reflux control method according to the first aspect of the present invention.
Compared with the prior art, the invention has the following beneficial effects:
in the low-temperature cold start process, firstly, preheating the hydrogen in a hydrogen medium-pressure cavity to a target temperature T1 according to a medium-pressure temperature sensor, and closing a heater when the temperature is greater than T1; simultaneously controlling a hydrogen inlet heater to control hydrogen backflow and controlling the pipe wall of the hydrogen inlet to reach a target temperature 70T1; when the start command of the fuel cell system is enabled, closing a loop to control the opening of a hydrogen proportional valve according to the hydrogen inlet stack pressure sensor 7 so as to enable the hydrogen inlet pressure to reach P1; while controlling the rotation of the swirl pump. This process heats the anode side of the fuel cell with hot hydrogen and melts the ice on the surface of the fuel cell. After the temperature sensor returns to T2, the heating in the anode cavity is successful, and the normal operation of the fuel cell can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present 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 structural diagram of a hydrogen gas reflux control method according to one embodiment of the present invention.
Detailed Description
To further clarify the above and other features and advantages of the present invention, a further description of the invention will be rendered by reference to the appended drawings. It should be understood that the specific embodiments presented herein are for purposes of explanation to those skilled in the art and are intended to be illustrative only and not limiting.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1, the first aspect of the present invention provides a hydrogen reflux control method, which includes the following steps:
acquiring the temperature of a hydrogen medium-pressure cavity and an electric pile inlet;
the PTC indirectly heats the temperature of the electric pile inlet and the hydrogen pressure cavity to T1 through the metal structure;
controlling the hydrogen pressure to be in a target pressure range;
and the heating of the pile inlet and the hydrogen pressure cavity is stopped by stopping the PTC pair and indirectly heating the pile inlet and the hydrogen pressure cavity through the metal structure.
S100, starting the fuel cell;
s200, controlling the vortex pump to rotate to heat the anode side of the fuel cell to a second target temperature through the heated hydrogen, and stopping heating the stack inlet and the hydrogen pressure cavity;
s300, controlling the rotating speed of a circulating pump until the stacking temperature is in a preset temperature range;
when the stacking temperature is lower than the preset temperature range, accumulating the rotating speed of the circulating pump;
when the stacking temperature is higher than the preset temperature range, reducing the rotating speed of the circulating pump;
and when the stacking temperature is in a preset temperature range, maintaining the rotating speed of the circulating pump.
S400, shutting down the fuel cell;
s500, controlling the hydrogen pressure to be at the lowest value of a target pressure range;
s600, controlling a circulating pump to the maximum rotation speed, and circulating to bring water on the anode side of the fuel cell into the fuel cell in a hydrogen backflow mode;
and S700, stopping the rotation of the circulating pump.
Controlling hydrogen reflux and the wall of the hydrogen inlet to a target temperature 70T1 by controlling a hydrogen inlet heater; the swirl pump is simultaneously controlled to rotate after the fuel cell system start-up command is enabled. This process heats the anode side of the fuel cell with hot hydrogen and melts the ice on the surface of the fuel cell. After the temperature sensor returns to T2, the heating in the anode cavity is successful, and the normal operation of the fuel cell can be realized.
In a further scheme of the invention, the preset temperature range is T5-T5+1, and the T5 is obtained according to the following formula:
X×T5＝(X-1)T4+T3
wherein X is a target hydrogen metering ratio; x-1 is hydrogen reflux ratio; t3 is the operating temperature of the galvanic pile; t4 is the hydrogen temperature of the medium pressure chamber.
In a further aspect of the invention, the temperature of the return hydrogen is obtained, and when the temperature of the return hydrogen is greater than T2, the fuel cell is started normally.
The second aspect of the present invention provides a hydrogen reflux control system, comprising:
the acquisition unit is used for acquiring the temperature and the pressure of each position in the fuel cell;
a control unit configured to:
controlling the vortex pump to rotate so as to heat the anode side of the fuel cell to a second target temperature, and stopping heating the stack inlet and the hydrogen pressure cavity;
controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range;
shutting down the fuel cell;
controlling the hydrogen pressure to be at the lowest value of the target pressure range;
controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode;
the circulation pump is stopped from rotating.
A third aspect of the present invention provides a storage medium storing a computer program, wherein the computer program, when executed by a processor, implements a hydrogen gas reflux control method according to the first aspect of the present invention.
Further, it should be understood by those skilled in the art that if the method, the system and the storage medium for controlling hydrogen gas backflow provided by the embodiments of the present invention are combined and replaced by fusing, simple changing, mutual changing and other manners, such as placing and moving the components; or the products formed by the two are integrally arranged; or a removable design; it is within the scope of the present invention to replace the corresponding components of the present invention with devices/apparatuses/systems that may be combined to form a device/apparatus/system having a specific function.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The hydrogen reflux control method is characterized by comprising the following steps of:
starting the fuel cell;
controlling the vortex pump to rotate to heat the anode side of the fuel cell to a second target temperature through the heated hydrogen, and stopping heating the stack inlet and the hydrogen pressure cavity;
controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range;
shutting down the fuel cell;
controlling the hydrogen pressure to be at the lowest value of the target pressure range;
controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode;
the circulation pump is stopped from rotating.
2. The hydrogen reflux control method according to claim 1, wherein the preset temperature range is T5 to t5+1, and T5 is obtained according to the following formula:
X×T5＝(X-1)T4+T3
wherein X is a target hydrogen metering ratio; x-1 is hydrogen reflux ratio; t3 is the operating temperature of the galvanic pile; t4 is the hydrogen temperature of the medium pressure chamber.
3. The hydrogen return flow control method according to claim 2, characterized by further comprising the steps of, before starting the fuel cell:
acquiring the temperature of a hydrogen medium-pressure cavity and an electric pile inlet;
the PTC indirectly heats the temperature of the electric pile inlet and the hydrogen pressure cavity to T1 through the metal structure;
controlling the hydrogen pressure to be in a target pressure range;
and the heating of the pile inlet and the hydrogen pressure cavity is stopped by stopping the PTC pair and indirectly heating the pile inlet and the hydrogen pressure cavity through the metal structure.
4. A method for controlling hydrogen gas recirculation according to claim 3, wherein controlling the rotation speed of the circulation pump until the temperature of the stack reaches a preset temperature range specifically comprises:
when the stacking temperature is lower than the preset temperature range, accumulating the rotating speed of the circulating pump;
when the stacking temperature is higher than the preset temperature range, reducing the rotating speed of the circulating pump;
and when the stacking temperature is in a preset temperature range, maintaining the rotating speed of the circulating pump.
5. A hydrogen reflux control method according to claim 3, characterized in that the hydrogen reflux control method further comprises the steps of:
and acquiring the temperature of the returned hydrogen, and when the temperature of the returned hydrogen is greater than T2, normally starting the fuel cell.
6. A hydrogen reflux control system, comprising:
the acquisition unit is used for acquiring the temperature and the pressure of each position in the fuel cell;
a control unit configured to:
controlling the vortex pump to rotate so as to heat the anode side of the fuel cell to a second target temperature, and stopping heating the stack inlet and the hydrogen pressure cavity;
controlling the rotating speed of the circulating pump until the stacking temperature is in a preset temperature range;
shutting down the fuel cell;
controlling the hydrogen pressure to be at the lowest value of the target pressure range;
controlling a circulating pump to the maximum rotating speed, and circularly taking water at the anode side of the fuel cell out of the fuel cell in a hydrogen backflow mode;
the circulation pump is stopped from rotating.
7. A storage medium storing a computer program, wherein the computer program, when executed by a processor, implements a hydrogen gas reflux control method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310249426.XA CN116799242A (en) | 2023-03-15 | 2023-03-15 | Hydrogen reflux control method, system and storage medium thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310249426.XA CN116799242A (en) | 2023-03-15 | 2023-03-15 | Hydrogen reflux control method, system and storage medium thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116799242A true CN116799242A (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310249426.XA Pending CN116799242A (en) | 2023-03-15 | 2023-03-15 | Hydrogen reflux control method, system and storage medium thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116799242A (en) |
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2023
- 2023-03-15 CN CN202310249426.XA patent/CN116799242A/en active Pending
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