CN212434671U - Enclosed ventilation and drainage device for proton exchange membrane fuel cell system shell - Google Patents
Enclosed ventilation and drainage device for proton exchange membrane fuel cell system shell Download PDFInfo
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- CN212434671U CN212434671U CN202021831551.XU CN202021831551U CN212434671U CN 212434671 U CN212434671 U CN 212434671U CN 202021831551 U CN202021831551 U CN 202021831551U CN 212434671 U CN212434671 U CN 212434671U
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- fuel cell
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- hydrogen
- shell
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- 239000000446 fuel Substances 0.000 title claims abstract description 62
- 238000009423 ventilation Methods 0.000 title claims abstract description 21
- 239000012528 membrane Substances 0.000 title claims abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 50
- 239000001257 hydrogen Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 82
- 239000007789 gas Substances 0.000 description 14
- 238000001914 filtration Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
Classifications
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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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- Fuel Cell (AREA)
Abstract
The utility model discloses a closed proton exchange membrane fuel cell system casing ventilation drainage device relates to fuel cell technical field. This device is including fuel cell stack, galvanic pile casing, air compressor machine, hydrogen circulating device that admits air, the fuel cell stack sets up in the galvanic pile casing, form the interior ventilation runner between fuel cell stack and the galvanic pile shells inner wall, air compressor machine, hydrogen circulating device that admits air set up outside the galvanic pile casing, the air compressor machine export is linked together through galvanic pile air intake pipe and fuel cell stack. The utility model has the characteristics of can lower the temperature to fuel cell stack operational environment, get rid of the inside comdenstion water of galvanic pile casing or reveal moisture to play sealed protection to the galvanic pile casing and do etc.
Description
Technical Field
The utility model relates to a fuel cell technical field, especially a closed proton exchange membrane fuel cell system casing ventilation drainage device.
Background
The hydrogen fuel cell stack is a place where hydrogen and oxygen electrochemically react, and mainly functions to generate electricity through the electrochemical reaction, and the product is water. The fuel cell stack is formed by superposing and sealing a certain number of monocells, and the internal structures of the monocells are as follows: the bipolar plate comprises a gas diffusion layer, an electrode, a catalyst layer, a proton exchange membrane, a catalyst layer, an electrode, a gas diffusion layer and a bipolar plate, wherein the two bipolar plates are sealed by a sealing ring.
At present, most of vehicle fuel cell systems adopt a closed shell packaging modular mode to ensure tightness, protect dust and water and protect a fuel cell stack. However, in the process of system operation, a small amount of hydrogen may leak and accumulate in the closed cell stack shell, and if the hydrogen cannot be diluted and discharged in time, a great potential safety hazard exists. In addition, the interface of the electric pile drain pipe can also be leaked by liquid, and condensed water can be generated by the change of cold and hot temperature difference in the shell.
As in the Chinese patent: a ventilation device of a closed fuel cell system is disclosed as (CN202585635U), and the ventilation device is characterized in that a branch is led from the front of a humidifier (7) behind an air compressor (11) and is connected with a shell gas distribution pipe (1,5-16), the distribution block and an explosion-proof fan (14) are used for simultaneously sweeping, the inside of a shell of a galvanic pile is fully ventilated and diluted, and the swept gas is converged into a fuel cell air tail discharge pipe (18) through an air outlet hole (17) and is discharged along with tail gas. Although the device ventilates in the casing and sweeps more comprehensively, does not have the dead angle, however, this kind of casing ventilation mode design installation is complicated to arrange in the pile casing and need occupy great space, and direct bleed air temperature is higher behind the air compressor machine, probably causes the high temperature ageing of the inside spare part of casing, and the risk that has ambient air, moisture to flow backward is connected with the tail calandria in addition.
In addition, Chinese patent: the fuel cell system with improved ventilation is disclosed as (CN109638323A), suction force generated by negative pressure in front of an air compressor (16) is utilized, air is sucked inwards from the outside of a galvanic pile shell through a flow limiter (32) to ventilate and purge the shell, so that the purpose of diluting possible hydrogen leakage is achieved, and purged gas is merged into air inlet of the air compressor. Although the design has a simple principle, the design and the installation are convenient, and no extra energy consumption exists; but its disadvantages are also evident: when hydrogen leakage or trace overflow exists in the galvanic pile in the shell, the risk that the air compressor directly pumps compressed air containing hydrogen into the cathode loop of the fuel cell pile exists, and the galvanic pile can be damaged; in addition, if the air inlet flow limiter has no air filtering function, the proton exchange membrane may be polluted by impurities containing S and N compounds in the air.
Chinese utility model patent, publication number (CN203039265U), mentions that the hydrogen concentration sensor sets the opening of the fan according to the hydrogen concentration, and the specific description is: when the hydrogen concentration in the indoor air of the storage battery chamber or the high-voltage chamber reaches 1/4 of the offline explosion concentration, the hydrogen concentration sensor triggers the starting end of the hydrogen concentration relay QQ, the coil of the hydrogen concentration relay QQ is electrified, the normally open contact of the hydrogen concentration relay QQ is closed, the coil of the second alternating current contactor JJ2 is electrified, the normally open contact of the second alternating current contactor JJ2 is closed, the electric fan operates, and the indoor air is discharged outdoors. "
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a closed proton exchange membrane fuel cell system casing ventilation drainage device, its purpose is ageing for the high internals of solution pile casing internal temperature to and the air moisture flows backward the scheduling problem.
In order to realize the purpose of the utility model, the technical scheme of the utility model is as follows:
a closed type ventilation and drainage device for a shell of a proton exchange membrane fuel cell system comprises a fuel cell stack, a stack shell, an air compressor and a hydrogen gas inlet circulating device, wherein the fuel cell stack is arranged in the stack shell, an inner ventilation flow channel is formed between the fuel cell stack and the inner wall of the stack shell, the air compressor and the hydrogen gas inlet circulating device are arranged outside the stack shell, an outlet of the air compressor is communicated with the fuel cell stack through a stack air inlet pipe, an inlet of the air compressor is provided with an air compressor inlet pipe, an outlet of the hydrogen gas inlet circulating device is communicated with the fuel cell stack through a stack hydrogen inlet pipe, the hydrogen gas inlet circulating device is provided with two inlets, one inlet is provided with a hydrogen gas inlet pipe, the other inlet is communicated with the fuel cell stack through a stack hydrogen gas outlet pipe, and the inner side wall of the stack shell is provided with, the fuel cell stack lower part is provided with the air tail calandria, the air tail calandria passes the pile casing and outwards extends, be provided with electronic fan on the lateral wall that the pile casing is close to the top, electronic fan is linked together through pile casing outlet duct and air tail calandria, be provided with one-way check valve on the pile casing outlet duct, pile casing bottom still is provided with pile casing intake pipe, be provided with the selectivity filter valve in the pile casing intake pipe.
Preferably, an adjustable stop valve is arranged on the hydrogen outlet pipe of the galvanic pile. This controls the flow and rate of stack hydrogen return.
Preferably, an air filter is arranged at the inlet of the air inlet pipe of the press and is communicated with the outlet of the air filter, and an air filtering air inlet pipe is connected to the inlet of the air filter. This filters out dust, particles, moisture, etc. from the air to clean the air.
The utility model has the advantages that:
1. according to the scheme provided by the utility model, the shell is ventilated without taking gas from the back of the air compressor, so that the burden of the air compressor is reduced, the stability of gas supply of an air path is improved, and in addition, the inlet air temperature is lower, so that the temperature of the working environment of the electric pile can be reduced;
2. according to the scheme provided by the utility model, the filter valve arranged on the air inlet pipe of the galvanic pile shell has a filtering function, so that the cleanness and the dryness of the inlet air are ensured, and the galvanic pile and the internal parts of the shell are protected;
3. the utility model provides a scheme sets up the filter valve in the galvanic pile casing intake pipe simultaneously and still has the function of getting rid of the inside condensation of galvanic pile casing or revealing moisture.
4. The utility model provides a scheme, one-way check valve and filter valve wherein can play sealed guard action to the pile casing under the system's off state.
Drawings
Fig. 1 is a schematic structural diagram of a closed proton exchange membrane fuel cell system casing ventilation and drainage device according to an embodiment of the present invention;
in the figure, 1-fuel cell stack; 2-a selective filter valve; 3-an electronic fan; 4-one-way check valve; 5-a stack shell; 6, an air compressor; 7-an air filter; 8-hydrogen intake circulation device; 9-a hydrogen concentration sensor; 10-an adjustable stop valve; 11-air filter air inlet pipe; 12-air compressor air inlet pipe; 13-a pile air inlet pipe; 14-air exhaust pipes; 15-a galvanic pile shell air inlet pipe; 16-an internal ventilation flow channel; 17-a gas outlet pipe of the pile shell; 18-hydrogen inlet pipe; 19-a hydrogen inlet pipe of the galvanic pile; 20-a hydrogen outlet pipe of the galvanic pile.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Examples
As shown in fig. 1, the utility model provides a closed proton exchange membrane fuel cell system casing ventilation and drainage device, which comprises a fuel cell stack 1, a stack casing 5, an air compressor 6 and a hydrogen intake circulation device 8, wherein the fuel cell stack 1 is arranged in the stack casing 5, an internal ventilation flow passage 16 is formed between the fuel cell stack 1 and the inner wall of the stack casing 5, the air compressor 6 and the hydrogen intake circulation device 8 are arranged outside the stack casing 5, the outlet of the air compressor 6 is communicated with the fuel cell stack 1 through a stack air intake pipe 13, the inlet of the air compressor 6 is provided with an air compressor intake pipe 12, the outlet of the hydrogen intake circulation device 8 is communicated with the fuel cell stack 1 through a stack hydrogen intake pipe 19, the hydrogen intake circulation device 8 is provided with two inlets, one of which is provided with a hydrogen intake pipe 18, another entry is linked together through pile hydrogen outlet duct 20 and fuel cell stack 1, be provided with the hydrogen concentration sensor 9 that is used for detecting hydrogen concentration on the 5 inside walls of pile casing, 1 lower part of fuel cell stack is provided with air tail calandria 14, air tail calandria 14 passes pile casing 5 and outwards extends, pile casing 5 is provided with on being close to the lateral wall at top and is used for the electronic fan 3 according to hydrogen concentration regulation, electronic fan 3 is linked together with air tail calandria 14 through pile casing outlet duct 17, be provided with one-way check valve 4 on pile casing outlet duct 17, pile casing 5 bottom still is provided with pile casing intake pipe 15, be provided with selectivity filter valve 2 on pile casing intake pipe 15.
As shown in fig. 1, when the fuel cell stack 1 is in operation, air is obtained at the inlet of the air compressor 6 through an air compressor inlet pipe 12, and then the air compressor 6 continuously supplies air to the fuel cell stack 1 through a stack air inlet pipe 13; meanwhile, the hydrogen gas inlet circulation device 8 receives hydrogen gas from the hydrogen gas inlet pipe 18 and supplies the hydrogen gas to the fuel cell stack 1 through the stack hydrogen gas inlet pipe 19, and when the fuel cell stack 1 works for a period of time and the concentration of the hydrogen gas in the fuel cell stack 1 is too high, the hydrogen gas can flow back to the hydrogen gas inlet circulation device 8 through the stack hydrogen gas outlet pipe 20 and then is supplied to the fuel cell stack 1; excess air in the fuel cell stack 1 can be exhausted through the air exhaust duct 14. In the closed galvanic pile casing 5, in the system operation process, may have a small amount of hydrogen to leak and gather in galvanic pile casing 5, when hydrogen concentration sensor 9 on galvanic pile casing 5 inside wall detects that hydrogen concentration reaches the early warning value, electronic fan 3 opens high-speed gear operation, increases the air volume (please refer to prior art CN203039265U), dilutes fast and excludes the hydrogen that leaks in the casing, the route of gas flow wherein is: the gas enters the electric pile shell 5 through the electric pile shell air inlet pipe 15, and the gas entering the electric pile shell 5 and the hydrogen and the moisture generated by the fuel cell pile 1 pass through the inner ventilation flow channel 16 together due to the fact that the electronic fan 3 continuously pumps the gas and the moisture is discharged through the electric fan 3, the one-way check valve 4, the electric pile shell air outlet pipe 17 and the air tail discharge pipe 14 and is discharged out of the electric pile shell 5, and therefore the hydrogen and the moisture are prevented from accumulating in the electric pile shell 5;
when the fuel cell stack does not work, the electronic fan 3 stops working, the selective filter valve 2 and the one-way check valve 4 are matched with the stack shell 5 to carry out sealing protection on the working environment of the fuel cell stack 1, and harmful gas, impurities, moisture and the like in the ambient atmosphere are prevented from entering the stack shell 5; when the system of the fuel cell stack 1 is shut down, after the fuel cell stack 1, the hydrogen gas inlet circulation device 8 and the air compressor 6 stop working, the electronic fan 3 can continuously work and sweep for a certain time to remove hydrogen and moisture possibly remaining in the stack shell 5, and after the electronic fan 3 sweeps, impurities, moisture and the like can be prevented from entering the stack shell 5 by the selective filter valve 2 and the one-way check valve 4, so that the sealing protection effect is achieved.
Thus, by the present apparatus, ventilation, hydrogen leakage protection and environmental cooling of the working environment of the fuel cell stack 1 can be performed; at the sealed protect function in system's shut down process and shut down state casing, also can air inlet selectivity filtering valve 2 have filtering capability, guarantee the cleanliness and the aridity of admitting air, the inside spare part of protection galvanic pile casing 5, simultaneously can the inside comdenstion water of galvanic pile casing 5 or the moisture of revealing.
Furthermore, an adjustable stop valve 10 is arranged on the hydrogen outlet pipe 19 of the galvanic pile. This controls the flow rate and speed at which the hydrogen gas in the fuel cell stack 1 is returned to the hydrogen intake circulation device 8.
Meanwhile, in another embodiment, the air inlet pipe 12 of the air compressor is provided with an air filter 7 at the inlet and is communicated with the outlet of the air filter 7, and the air filter inlet pipe 11 is connected to the inlet of the air filter 7. Dust, particulate matters, moisture and the like in the air entering the air compressor 6 can be filtered out, and the air cleaning effect is achieved.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. A closed type ventilation and drainage device for a shell of a proton exchange membrane fuel cell system is characterized by comprising a fuel cell stack (1), a stack shell (5), an air compressor (6) and a hydrogen gas intake circulating device (8), wherein the fuel cell stack (1) is arranged in the stack shell (5), an internal ventilation flow passage (16) is formed between the fuel cell stack (1) and the inner wall of the stack shell (5), the air compressor (6) and the hydrogen gas intake circulating device (8) are arranged outside the stack shell (5), the outlet of the air compressor (6) is communicated with the fuel cell stack (1) through a stack air intake pipe (13), the inlet of the air compressor (6) is provided with an air compressor intake pipe (12), the outlet of the hydrogen gas intake circulating device (8) is communicated with the fuel cell stack (1) through a stack hydrogen intake pipe (19), the hydrogen air inlet circulating device (8) is provided with two inlets, one inlet is provided with a hydrogen inlet pipe (18), the other inlet is communicated with the fuel cell stack (1) through a stack hydrogen outlet pipe (20), the inner side wall of the stack shell (5) is provided with a hydrogen concentration sensor (9), the lower part of the fuel cell stack (1) is provided with an air tail exhaust pipe (14), the air tail exhaust pipe (14) penetrates through the stack shell (5) and extends outwards, the side wall of the stack shell (5) close to the top is provided with an electronic fan (3), the electronic fan (3) is communicated with the air tail exhaust pipe (14) through a stack shell outlet pipe (17), the stack shell outlet pipe (17) is provided with a one-way check valve (4), the bottom of the stack shell (5) is also provided with a stack shell inlet pipe (15), and a selective filter valve (2) is arranged on the air inlet pipe (15) of the galvanic pile shell.
2. The enclosed pem fuel cell system housing vent drain assembly of claim 1, wherein said stack hydrogen outlet duct (20) is provided with an adjustable shut-off valve (10).
3. The enclosed type proton exchange membrane fuel cell system shell ventilation and drainage device as claimed in claim 1, wherein an air filter (7) is arranged at the inlet of the air compressor air inlet pipe (12) and is communicated with the outlet of the air filter (7), and an air filter air inlet pipe (11) is connected to the inlet of the air filter (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831551.XU CN212434671U (en) | 2020-08-28 | 2020-08-28 | Enclosed ventilation and drainage device for proton exchange membrane fuel cell system shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831551.XU CN212434671U (en) | 2020-08-28 | 2020-08-28 | Enclosed ventilation and drainage device for proton exchange membrane fuel cell system shell |
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| Publication Number | Publication Date |
|---|---|
| CN212434671U true CN212434671U (en) | 2021-01-29 |
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|---|---|---|---|
| CN202021831551.XU Active CN212434671U (en) | 2020-08-28 | 2020-08-28 | Enclosed ventilation and drainage device for proton exchange membrane fuel cell system shell |
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| Country | Link |
|---|---|
| CN (1) | CN212434671U (en) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220907 Address after: No. 9, Keyuan East 11th Road, High-tech Zone, Nanning City, Guangxi Zhuang Autonomous Region, 530009 Patentee after: Yuchaixinlan New Energy Power Technology Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Yuchai Xingshunda New Energy Technology Co.,Ltd. Assignor: Yuchaixinlan New Energy Power Technology Co.,Ltd. Contract record no.: X2024980002254 Denomination of utility model: A closed proton exchange membrane fuel cell system shell ventilation and drainage device Granted publication date: 20210129 License type: Common License Record date: 20240227 |
|
| EE01 | Entry into force of recordation of patent licensing contract |