CN220155571U - Hydrogen supply system for fuel cell - Google Patents
Hydrogen supply system for fuel cell Download PDFInfo
- Publication number
- CN220155571U CN220155571U CN202321568414.5U CN202321568414U CN220155571U CN 220155571 U CN220155571 U CN 220155571U CN 202321568414 U CN202321568414 U CN 202321568414U CN 220155571 U CN220155571 U CN 220155571U
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- CN
- China
- Prior art keywords
- hydrogen
- fuel cell
- supply system
- pressure
- pipeline
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 129
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 129
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 239000000446 fuel Substances 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model provides a hydrogen supply system for a fuel cell, which belongs to the field of fuel cells, wherein an air inlet end of a hydrogen inlet pipeline is connected with a hydrogen cylinder, and an air outlet end of the hydrogen inlet pipeline is communicated with an air inlet of a fuel cell stack; the hydrogen inlet pipeline is provided with a buffer tank; the air inlet end of the hydrogen circulation pipeline is communicated with the air outlet of the fuel cell stack, and the air outlet end is communicated with the buffer tank; the hydrogen circulation pipeline is also provided with a water distribution tank and a circulation pump in sequence. The utility model can discharge redundant hydrogen in the fuel cell stack to the water diversion tank for gas-water separation through the hydrogen circulation pipeline, and circulate the separated hydrogen to the buffer tank for cyclic utilization, thereby effectively improving the utilization rate of hydrogen fuel.
Description
Technical Field
The utility model belongs to the field of fuel cells, and particularly relates to a hydrogen supply system for a fuel cell.
Background
Hydrogen fuel cells require a sufficient supply of fuel and oxidant, typically from oxygen in air, in hydrogen-air fuel cells where the fuel is hydrogen. To ensure the cruising requirements, hydrogen is stored in high pressure hydrogen cylinders, so the high pressure stored hydrogen needs to be exported and can be depressurized to within the pressure requirements of the fuel cell.
At present, redundant hydrogen in the existing hydrogen fuel cell is not fully utilized, the hydrogen fuel utilization rate is low, and the waste of hydrogen resources is caused.
Disclosure of Invention
In order to overcome the problem of waste of hydrogen resources, the present utility model provides a hydrogen supply system for a fuel cell, comprising:
the air inlet end of the hydrogen inlet pipeline is communicated with a hydrogen cylinder, and the air outlet end of the hydrogen inlet pipeline is communicated with the air inlet of the fuel cell stack; a buffer tank is arranged on the hydrogen inlet pipeline;
the air inlet end of the hydrogen circulation pipeline is communicated with the air outlet of the fuel cell stack, and the air outlet end of the hydrogen circulation pipeline is communicated with the buffer tank; the hydrogen circulation pipeline is sequentially provided with a water distribution tank and a circulation pump according to the gas flow direction;
preferably, a pressure reducing valve, a filter and a pressure regulating valve are arranged between the hydrogen cylinder and the buffer tank in sequence according to the gas flow direction.
Preferably, the hydrogen inlet pipeline is further provided with a first pressure sensor and a second pressure sensor, and the first pressure sensor is positioned between the filter and the pressure regulating valve; the second pressure sensor is located between the buffer tank and the fuel cell stack.
Preferably, the hydrogen inlet pipeline is further provided with a first drain valve, and the first drain valve is connected with the buffer tank.
Preferably, the hydrogen circulation pipeline is further provided with a second drain valve, and the second drain valve is connected with the water diversion tank.
Preferably, a hydrogen concentration sensor is further included, the hydrogen concentration sensor being located near the fuel cell stack.
Preferably, the water diversion tank further comprises a controller, and the water diversion tank and the circulating pump are electrically connected with the controller.
Preferably, the pressure reducing valve, the pressure regulating valve, the first drain valve, the second drain valve, the first pressure sensor, the second pressure sensor, and the hydrogen concentration sensor are all electrically connected to the controller.
The hydrogen supply system for the fuel cell has the following beneficial effects:
according to the utility model, redundant hydrogen in the fuel cell stack can be discharged to the water diversion tank for gas-water separation through the hydrogen circulation pipeline, and the separated hydrogen is circulated to the buffer tank by the circulation pump for slow cyclic utilization, so that the utilization rate of hydrogen fuel is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model and the design thereof, the drawings required for the embodiments will be briefly described below. The drawings in the following description are only some of the embodiments of the present utility model and other drawings may be made by those skilled in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of a hydrogen supply system for a fuel cell according to an embodiment of the present utility model.
Reference numerals illustrate:
the device comprises a 1-hydrogen inlet pipeline, a 2-hydrogen cylinder, a 3-fuel cell stack, a 4-buffer tank, a 5-hydrogen circulation pipeline, a 6-water distribution tank, a 7-circulation pump, an 8-pressure reducing valve, a 9-filter, a 10-pressure regulating valve, a 11-first pressure sensor, a 12-second pressure sensor, a 13-first drain valve, a 14-second drain valve and a 15-hydrogen concentration sensor.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and the embodiments, so that those skilled in the art can better understand the technical scheme of the present utility model and can implement the same. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
In the description of the present utility model, 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", "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 technical solutions of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements 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 utility model.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified or limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more, and will not be described in detail herein.
Examples
The utility model provides a hydrogen supply system for a fuel cell, which comprises a hydrogen inlet pipeline 1 and a hydrogen circulation pipeline 5 as shown in figure 1.
The air inlet end of the hydrogen inlet pipeline 1 is communicated with a hydrogen cylinder 2, and the air outlet end is communicated with the air inlet of the fuel cell stack 3; a buffer tank 4 is arranged on the hydrogen inlet pipeline 1; the air inlet end of the hydrogen circulation pipeline 5 is communicated with the air outlet of the fuel cell stack 3, and the air outlet end is communicated with the buffer tank 4; the hydrogen circulation pipeline 5 is provided with a water distributing tank 6 and a circulation pump 7 in sequence according to the gas flow direction.
A hydrogen inlet pipeline 1 is used for supplying hydrogen to a fuel cell stack 3, and the hydrogen inlet pipeline 1 sequentially comprises a hydrogen cylinder 2, a pressure reducing valve 8, a filter 9, a first pressure sensor 11, a pressure regulating valve 10, a buffer tank 4 and a second pressure sensor 12; the high-pressure hydrogen released from the hydrogen cylinder 2 is depressurized through a depressurization valve 8; the pressure regulating valve 10 regulates the pressure of the depressurized hydrogen gas, and then the hydrogen gas is buffered by the buffer tank 4 and enters the fuel cell stack 3 to react.
The functions of the elements of the hydrogen inlet pipeline 1 are as follows:
hydrogen cylinder 2: a fuel cell hydrogen storage device.
Pressure reducing valve 8: the hydrogen gas output from the hydrogen cylinder 2 is subjected to first-stage depressurization.
Filter 9: the hydrogen impurity entering the system is filtered, the fuel cell stack 3, the pressure regulating valve 10, the hydrogen circulating pump 7 and the pipeline are protected from pollution and blockage, and the system safety and the service life of the fuel cell stack 3 are ensured.
The first pressure sensor 11: the hydrogen pressure in the pipe is monitored to confirm whether the requirement of depressurization is met, ensuring that the requirements and safety of the fuel cell stack 3 are met.
Pressure regulating valve 10: and the hydrogen pressure entering the fuel cell stack 3 is regulated in linkage with the hydrogen pressure entering the stack, so that the hydrogen use and supply of the system are ensured.
Buffer tank 4: the mixing buffer pressure regulating valve 10 is used for exhausting air and returning air from the circulating pump 7, so as to counteract the influence of the drain valve on the fluctuation of the hydrogen pressure.
First drain valve 13: and discharging separated liquid water to maintain dynamic balance of the system.
Second pressure sensor 12: the hydrogen state of the stack is detected, and references and guarantees are made for hydrogen regulation and stable operation of the fuel cell stack 3.
The hydrogen circulation pipeline 5 comprises a water distribution tank 6, a circulation pump 7 and a second drain valve 14, the hydrogen circulation pipeline 5 is used for discharging redundant hydrogen in the fuel cell stack 3 to the water distribution tank 6 for gas-water separation, and the separated hydrogen is circulated to the buffer tank 4 by the circulation pump 7 for slow circulation.
The functions of the elements of the hydrogen circulation line 5 are as follows:
and (3) a water distribution tank 6: the hydrogen water entering the circulating pump 7 is separated, so that the phenomenon that the cell electrode is flooded due to the fact that excessive water is circulated into the electric pile is avoided.
And a circulation pump 7: the hydrogen in the pipeline is circulated, so that accumulated liquid water is discharged from the anode side in the fuel cell stack 3 due to the circulation of the hydrogen, and the good performance of the stack is maintained; on one hand, the circulating pump 7 can realize that the moisture of the reaction tail gas is brought into the battery to play a role in humidifying; on the other hand, the flow rate of hydrogen in the anode flow channel of the fuel cell can be improved, the accumulation of anode water is prevented, and anode flooding is avoided; meanwhile, the purpose of improving the utilization rate of hydrogen is achieved.
A second drain valve 14: and discharging separated liquid water to maintain dynamic balance of the system.
The hydrogen supply system also comprises a hydrogen concentration sensor 15, wherein the hydrogen concentration sensor 15 is positioned near the fuel cell stack 3, and is used for detecting the leakage condition of the system hydrogen in the atmosphere, so that the hydrogen safety and the system safety are ensured.
In the present embodiment, the apparatus further includes a controller, and the water separation tank 6, the circulation pump 7, the pressure reducing valve 8, the pressure regulating valve 9, the first drain valve 13, the second drain valve 14, the first pressure sensor 11, the second pressure sensor 12, and the hydrogen concentration sensor 15 are all electrically connected to the controller.
Working principle: the high-pressure hydrogen is depressurized to a set pressure value through the pressure reducing valve 8 after being released from the hydrogen cylinder 2, the medium-pressure hydrogen filters impurities possibly carried in the hydrogen through the filter 9, the pipeline and the galvanic pile are prevented from being damaged, and the pressure sensor monitors the pressure of the hydrogen to ensure that the pressure of the hydrogen is within a reasonable range. The pressure regulating valve 10 is linked with the set hydrogen pressure for stacking, and the medium-pressure hydrogen is regulated to meet the requirement of the hydrogen pressure for stacking, so that the hydrogen supply of the system is ensured. The hydrogen coming out of the hydrogen cylinder 2 is buffered by the buffer tank 4, and then enters the inside of the electric pile for reaction after the pressure of the hydrogen is monitored by a pressure sensor. After the redundant reaction gas is discharged from the inside of the electric pile, the gas-water separation is carried out by the water separating tank 6, liquid water carried in the gas discharged from the pile is separated, the liquid water is discharged through the drain valve, hydrogen is circularly supplied to the buffer tank 4 by the circulating pump 7 for buffering and then enters the pile again for realizing the cyclic utilization, and the liquid water which is not completely separated is discharged through the drain valve.
As is apparent from the above description, the present utility model can discharge the excessive hydrogen gas in the fuel cell stack 3 to the water separation tank 6 through the hydrogen circulation line 5 to perform gas-water separation, and circulate the separated hydrogen gas to the buffer tank 4 by the circulation pump 7 to be recycled slowly, thereby effectively improving the utilization ratio of the hydrogen fuel.
The above embodiments are merely preferred embodiments of the present utility model, the protection scope of the present utility model is not limited thereto, and any simple changes or equivalent substitutions of technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present utility model disclosed in the present utility model belong to the protection scope of the present utility model.
Claims (8)
1. A hydrogen supply system for a fuel cell, comprising:
the hydrogen inlet pipeline (1) is communicated with the hydrogen cylinder (2) at the air inlet end, and the air outlet end is communicated with the air inlet of the fuel cell stack (3); a buffer tank (4) is arranged on the hydrogen inlet pipeline (1);
the air inlet end of the hydrogen circulation pipeline (5) is communicated with the air outlet of the fuel cell stack (3), and the air outlet end of the hydrogen circulation pipeline is communicated with the buffer tank (4); the hydrogen circulation pipeline (5) is provided with a water distribution tank (6) and a circulation pump (7) in sequence according to the gas flow direction.
2. The hydrogen supply system for a fuel cell according to claim 1, wherein a pressure reducing valve (8), a filter (9), and a pressure regulating valve (10) are provided in this order in a gas flow direction between the hydrogen cylinder (2) and the buffer tank (4).
3. The hydrogen supply system for a fuel cell according to claim 2, wherein the hydrogen inlet pipe (1) is further provided with a first pressure sensor (11) and a second pressure sensor (12), the first pressure sensor (11) being located between the filter (9) and the pressure regulating valve (10); the second pressure sensor (12) is located between the buffer tank (4) and the fuel cell stack (3).
4. A hydrogen supply system for a fuel cell according to claim 3, characterized in that the hydrogen inlet pipe is further provided with a first drain valve (13), the first drain valve (13) being connected to the buffer tank (4).
5. The hydrogen supply system for a fuel cell according to claim 4, wherein the hydrogen circulation line (5) is further provided with a second drain valve (14), and the second drain valve (14) is connected to the water separation tank (6).
6. The hydrogen supply system for a fuel cell according to claim 5, further comprising a hydrogen concentration sensor (15), the hydrogen concentration sensor (15) being located in the vicinity of the fuel cell stack (3).
7. The hydrogen supply system for a fuel cell according to claim 6, further comprising a controller, wherein the water diversion tank (6) and the circulation pump (7) are electrically connected to the controller.
8. The hydrogen supply system for a fuel cell according to claim 7, wherein the pressure reducing valve (8), the pressure regulating valve (10), the first drain valve (13), the second drain valve (14), the first pressure sensor (11), the second pressure sensor (12), and the hydrogen concentration sensor (15) are electrically connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321568414.5U CN220155571U (en) | 2023-06-20 | 2023-06-20 | Hydrogen supply system for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321568414.5U CN220155571U (en) | 2023-06-20 | 2023-06-20 | Hydrogen supply system for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220155571U true CN220155571U (en) | 2023-12-08 |
Family
ID=89012093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321568414.5U Active CN220155571U (en) | 2023-06-20 | 2023-06-20 | Hydrogen supply system for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220155571U (en) |
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2023
- 2023-06-20 CN CN202321568414.5U patent/CN220155571U/en active Active
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| GR01 | Patent grant |