CN1734815A - Fuel cell capable of improving hydrogen utilization rate - Google Patents
Fuel cell capable of improving hydrogen utilization rate Download PDFInfo
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- CN1734815A CN1734815A CNA2004100536316A CN200410053631A CN1734815A CN 1734815 A CN1734815 A CN 1734815A CN A2004100536316 A CNA2004100536316 A CN A2004100536316A CN 200410053631 A CN200410053631 A CN 200410053631A CN 1734815 A CN1734815 A CN 1734815A
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- hydrogen
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 132
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 132
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 239000000446 fuel Substances 0.000 title claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 239000012809 cooling fluid Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000000110 cooling liquid Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 25
- 238000010248 power generation Methods 0.000 description 19
- 239000007800 oxidant agent Substances 0.000 description 15
- 230000001590 oxidative effect Effects 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 230000005484 gravity Effects 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 238000003487 electrochemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- -1 hydrogen cations Chemical class 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
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
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- Fuel Cell (AREA)
Abstract
This invention relates to fuel battery to increase hydrogen utility, which comprises fuel battery stack, hydrogen storage device, reducing valve, air filter device, air compression supplying device, hydrogen water-steam separator, air water-steam separators, water tank, cooling liquid circulating pump, radiator, hydrogen and air humidification devices, hydrogen stable pressure valve, and normally closed solenoid valve arranged on outlet of the said hydrogen water-steam separator or connected directly with hydrogen output pipe of fuel battery stack; arranging hydrogen inlet of guide hydrogen plate on its top and the hydrogen output on its bottom. Compared with existing technique, the invention makes the entered air and hydrogen without water and ensures the running stability of fuel battery.
Description
Technical Field
The present invention relates to a fuel cell, and more particularly, to a fuel cell capable of improving hydrogen utilization.
Background
An electrochemical fuel cell is a device capable of converting hydrogen and an oxidant into electrical energy and reaction products. The inner core component of the device is a Membrane Electrode (MEA), which is composed of a proton exchange Membrane and two porous conductive materials sandwiched between two surfaces of the Membrane, such as carbon paper. The membrane contains a uniform and finely dispersed catalyst, such as a platinum metal catalyst, for initiating an electrochemical reaction at the interface between the membrane and the carbon paper. The electrons generated in the electrochemical reaction process can be led out by conductive objects at two sides of the membrane electrode through an external circuit to form a current loop.
At the anode end of the membrane electrode, fuel can permeate through a porous diffusion material (carbon paper) and undergo electrochemical reaction on the surface of a catalyst to lose electrons to form positive ions, and the positive ions can pass through a proton exchange membrane through migration to reach the cathode end at the other end of the membrane electrode. At the cathode end of the membrane electrode, a gas containing an oxidant (e.g., oxygen), such as air, forms negative ions by permeating through a porous diffusion material (carbon paper) and electrochemically reacting on the surface of the catalyst to give electrons. The anions formed at the cathodeend react with the positive ions transferred from the anode end to form reaction products.
In a pem fuel cell using hydrogen as the fuel and oxygen-containing air as the oxidant (or pure oxygen as the oxidant), the catalytic electrochemical reaction of the fuel hydrogen in the anode region produces hydrogen cations (or protons). The proton exchange membrane assists the migration of positive hydrogen ions from the anode region to the cathode region. In addition, the proton exchange membrane separates the hydrogen-containing fuel gas stream from the oxygen-containing gas stream so that they do not mix with each other to cause explosive reactions.
In the cathode region, oxygen gains electrons on the catalyst surface, forming negative ions, which react with the hydrogen positive ions transported from the anode region to produce water as a reaction product. In a proton exchange membrane fuel cell using hydrogen, air (oxygen), the anode reaction and the cathode reaction can be expressed by the following equations:
and (3) anode reaction:
and (3) cathode reaction:
in a typical pem fuel cell, a Membrane Electrode (MEA) is generally placed between two conductive plates, and the surface of each guide plate in contact with the MEA is die-cast, stamped, or mechanically milled to form at least one or more channels. The flow guide polar plates can be polar plates made of metal materials or polar plates made of graphite materials. The fluid pore channels and the diversion trenches on the diversion polar plates respectively guide the fuel and the oxidant into the anode area and the cathode area on two sides of the membrane electrode. In the structure of a single proton exchange membrane fuel cell, only one membrane electrode is present, and a guide plate of anode fuel and a guide plate of cathode oxidant are respectively arranged on two sides of the membrane electrode. The guide plates are used as current collector plates and mechanical supports at two sides of the membrane electrode, and the guide grooves on the guide plates are also used as channels for fuel and oxidant to enter the surfaces of the anode and the cathode and as channels for taking away water generated in the operation process of the fuel cell.
In order to increase the total power of the whole proton exchange membrane fuel cell, two or more single cells can be connected in series to form a battery pack in a straight-stacked manner or connected in a flat-laid manner to form a battery pack. In the direct-stacking and serial-type battery pack, two surfaces of one polar plate can be provided with flow guide grooves, wherein one surface can be used as an anode flow guide surface of one membrane electrode, and the other surface can be used as a cathode flow guide surface of another adjacent membrane electrode, and the polar plate is called a bipolar plate. A series of cells are connected together in a manner to form a battery pack. The battery pack is generally fastened together into one body by a front end plate, a rear end plate and a tie rod.
A typical battery pack generally includes: (1) the fuel (such as hydrogen, methanol or hydrogen-rich gas obtained by reforming methanol, natural gas and gasoline) and the oxidant (mainly oxygen or air) are uniformly distributed in the diversion trenches of the anode surface and the cathode surface; (2) the inlet and outlet of cooling fluid (such as water) and the flow guide channel uniformly distribute the cooling fluid into the cooling channels in each battery pack, and the heat generated by the electrochemical exothermic reaction of hydrogen and oxygen in the fuel cell is absorbed and taken out of the battery pack for heat dissipation; (3) the outlets of the fuel gas and the oxidant gas and the corresponding flow guide channels can carry out liquid and vapor water generated in the fuel cell when the fuel gas and the oxidant gas are discharged. Typically, all fuel, oxidant, and cooling fluid inlets and outlets are provided in one or both end plates of the fuel cell stack.
The proton exchange membrane fuel cell can be used as a power system of vehicles, ships and other vehicles, and can also be used as a movable and fixed power generation device.
When the proton exchange membrane fuel cell can be used as a vehicle power system, a ship power system or a mobile and fixed power station, the proton exchange membrane fuel cell must comprise a cell stack, a fuel hydrogen supply system, an air supply subsystem, a cooling and heat dissipation subsystem, an automatic control part and an electric energy output part.
Fig. 1 shows a fuel cell power generation system, in fig. 1, 1 is a fuel cell stack, 2 is a hydrogen storage bottle or other hydrogen storage device, 3 is a pressure reducing valve, 4 is an air filtering device, 5 is an air compression supply device, 6', 6 are water-vapor separators, 7 is a water tank, 8 is a cooling fluid circulating pump, 9 is a radiator, 10 is a hydrogen circulating pump, 11, 12 are humidification devices, and 13 is a hydrogen pressure stabilizing valve.
In order to improve the energy conversion efficiency of the entire power generation system of the fuel cell, it is important to improve the hydrogen utilization rate of the power generation system of the fuel cell in addition to the electrode performance of the fuel cell. The supply and the cyclic utilization of hydrogen ions have key functions on improving the hydrogen utilization rate of the fuel cell power generation system and ensuring the operation stability of the fuel cell starting system. After pressure reduction and stabilization, the fuel hydrogen is conveyed into the fuel cell stack through the humidifying device and reacts with the oxidant on the other side of the electrode in an electrochemical way. Water is slowly generated as the reaction proceeds on the hydrogen supply side of the electrode. The water comes from two main aspects, namely, the humidified hydrogen carries part of water to enter a fuel cell stack, and the water is left after the hydrogen reacts; the other part is that the product water of the electrochemical reaction runs from the cathode side of the electrode to the anode side of the electrode through reverse osmosis of the electrode. In order to carry this portion of the water out of the fuel cell stack from the anode side of the electrodes, a hydrogen flow greater than 1.0 stoichiometric ratio must be supplied to the fuel cell stack, and excess hydrogen will leave the fuel cell stack, carrying this portion of the water out.
Therefore, the following technologies can be used for recycling excess hydrogen and taking out water in the fuel cell stack:
(1) the hydrogen circulating pump and the circulating device are utilized. As shown in fig. 1, the hydrogen circulation device uses the excess hydrogen to re-enter the fuel cell stack for reaction, and can take the two parts of water out of the fuel cell stack. For example, the patent technology "a hydrogen recycling device of fuel cell suitable for low-pressure operation", chinese patent No. 03255444.3.
(2) The ejection pump technology is adopted. For example, US Patent 5441821 (1995) mainly uses high pressure and high speed hydrogen to pass through a catapult pump, and then a vacuum state is generated in a cavity of the catapult pump, so that excessive hydrogen in the fuel cell stack is sucked back and enters the fuel cell stack again, and at the same time, the two parts of water can be taken out of the fuel cell stack.
Both of the above techniques have significant technical drawbacks:
(1) the hydrogen circulating pump is adopted, so that expensive devices are added in the whole fuel cell power generation system, the hydrogen circulating pump directly consumes power, and the power generation efficiency of the whole fuel cell power generation system is reduced, namely the fuel hydrogen conversion efficiency.
(2) The hydrogen circulating pump increases the integrated weight and volume of the whole fuel cell power generation system, unsafe factors are increased, and hydrogen is easy to leak in the hydrogen circulating pump body.
(3) By utilizing the ejection pump technology, high-pressure hydrogen must be input before the ejection pump, and the pressure of the ejection pump after the ejection pump sprays the hydrogen into the fuel cell stack is generally much lower than that of the front end of the ejection pump, so that the ejection pump cavity can be ensured to generate larger vacuum suction. However, when the fuel cell stops operating, the pressures at the front and rear ends of the ejector pump will equalize, causing the fuel cell stack to experience dangerously high hydrogen pressures. To prevent the above-mentioned dangerous situation from occurring, it is necessary to employ a very expensive and sensitive control system for controlling the hydrogen pressure of the fuel cell stack within the normal operating pressure range.
(4) When the output power of the fuel cell power generation system changes sharply, the catapult pump technology is difficult to ensure that the fuel cell stack is in a normal hydrogen pressure range. Particularly, when the high power output is suddenly changed into the low power output, the fuel cell stack bears the pressure which is not much different from the high-pressure hydrogen pressure at the front end of the ejection pump at a certain moment because the reaction of the control system needs a certain time. And when the output power of the fuel cell power generation system changes frequently, the design of the same ejection pump is difficult to meet the requirement that the flow of the sucked excessive hydrogen can be in a narrow range, the flow change range of the sucked excessive hydrogen is large, and the stability of the fuel cell power generation system cannot be ensured.
(5) The ejector pump is difficult to manufacture and is expensive and adds bulk and weight to the fuel cell power system when integrated with the control system.
Disclosure of Invention
The present invention aims at providing one kind of fuel cell with simple structure, low cost and stable operation and capable of raising hydrogen utilizing rate.
The purpose of the invention can be realized by the following technical scheme: a fuel cell capable of improving the utilization rate of hydrogen comprises a fuel cell stack, a hydrogen storage device, a pressure reducing valve, an air filtering device, an air compression supply device, a hydrogen water-steam separator, an air water-steam separator, a water tank, a cooling fluid circulating pump, a radiator, a hydrogen humidifying device, an air humidifying device and a hydrogen pressure stabilizing valve.
The pressure of the hydrogen supplied to the fuel cell stack is the pressure of the hydrogen after passing through a pressure reducing valve, a hydrogen pressure stabilizing valve and a hydrogen humidifying device, and the pressure is greater than the atmospheric pressure.
The working pressure of the hydrogen side of the electrode in the fuel cell stack is 0.1-1 atmospheric pressure higher than that of the air side of the electrode.
The normally closed electromagnetic valve is opened once every 5-600 seconds in the operation process of the fuel cell, and the opening duration time is 1-5 seconds.
The high pressure fuel hydrogen enters the fuel cell stack after passing through the pressure reducing and stabilizing device and the humidifying device, the fuel cell stack fuel hydrogen main outlet is connected with a water-steam separator by a pipeline, the water-steam separator is provided with a normally closed electromagnetic valve which is in a closed state under the normal condition, and the normally closed electromagnetic valve can also be connected with the fuel cell stack hydrogen main outlet pipeline. Thus, after hydrogen is supplied to the fuel cell stack, there is no recirculation loop, and the hydrogen supply to the fuel cell stack is a dead end type supply. The pressure of hydrogen supplied to the fuel cell stack is the pressure of the hydrogen after passing through the pressure reducing and stabilizing device, and is the same as the working pressure of the fuel cell stack. The output power of the fuel cell stack can be changed greatly, but the working pressure of the fuel cell stack can be ensured to be stable as long as the pressure reduction and stabilization device can ensure the pressure stabilization function in a large hydrogen flow variation range, and the working pressure is generally larger than the atmospheric pressure. The working pressure of the electrode hydrogen side in the fuel cell stack is always higher than that of the electrode oxidant side by 0.1-1 atmospheric pressure, so that the product water generated on the electrode oxidant side of the fuel cell stack is difficult to reverse osmosis to the electrode hydrogen side. The design of the guide plate hydrogen flow guiding field in the fuel cell stack of the invention is required to be along the direction of gravity, which is beneficial to draining water by utilizing gravity. According to the invention, within a certain time (5-600 seconds) along with the operation of the fuel cell power generation system, a normally closed (drainage) electromagnetic valve on a hydrogen water-steam separator or a hydrogen main outlet pipeline is opened once so as to effectively discharge accumulated water on the hydrogen side in the fuel cell stack.
Compared with the prior art, the invention has the following advantages:
(1) reduced complex, expensive hydrogen circulation devices or components throughout the fuel cell power generation system.
(2) Greatly improves the hydrogen utilization rate of the whole fuel cell power generation system. Since hydrogen is consumed with the fuel cell stack output power, it is not discharged and is a mustache supply.
(3) The design of a special hydrogen flow guiding field according to the gravity direction is adopted, which is beneficial to gravity drainage.
(4) The hydrogen operation pressure is stable, and the fluctuation is not large because of the power output change of the fuel cell stack.
Since the hydrogen operating pressure is higher than the electrode air side, product water reverse osmosis is greatly reduced. The hydrogen diversion trench is favorable to be smooth.
(5) The hydrogen operating pressure is at least higher than atmospheric pressure. It is possible to drain a small amount of water from the fuel cell stack when the water drain solenoid valve is opened, thereby ensuring the stability of the operation of the fuel cell power generation system.
Drawings
FIG. 1 is a schematic diagram of a prior art fuel cell power generation system;
FIG. 2 is a schematic diagram showing the construction of a hydrogen supply portion of a fuel cell according to the present invention;
FIG. 3 is another schematic diagram of the hydrogen supply portion of the fuel cell according to the present invention;
FIG. 4 is a schematic view of the structure of a hydrogen flow guiding plate according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a hydrogen flow guiding plate according to embodiment 2 of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1
As shown in fig. 2 and 4 in combination with fig. 1, a fuel cell capable of improving hydrogen utilization rate includes a fuel cell stack 1, a hydrogen storage device 2, a pressure reducing valve 3, an air filtering device 4, an air compression supply device 5, a hydrogen water-vapor separator 6, an air water-vapor separator 6', a water tank 7, a cooling fluid circulating pump 8, a radiator 9, a hydrogen humidifying device 11, an air humidifying device 12, a hydrogen pressure stabilizing valve 13, and a normally closed solenoid valve 14, wherein the normally closed solenoid valve 14 is disposed at an outlet end of the hydrogen water-vapor separator 6, a hydrogen inlet 111 of a hydrogen guiding flow plate 11 of the fuel cell stack 1 is disposed at the top thereof, a hydrogen outlet 113 is disposed at the bottom thereof, a guiding groove 112 on the hydrogen guiding flow plate 11 is a straight groove from top to bottom, and hydrogen flows from top to bottom along a gravity P direction on the hydrogen guiding flow plate 11. The working pressure of the hydrogen side of the electrode in the fuel cell stack 1 is 0.1 atmospheric pressure higher than the working pressure of the air side of the electrode.
In the present example, a 10KW fuel cell stack was used, 100 cells, each cell having a hydrogen guide flow plate size of 206mm × 206 mm; the hydrogen guide field in the hydrogen guide flow plate flows in the gravity direction, as shown in figure 3; the high-pressure hydrogen is decompressed and input into the fuel cell stack after being stabilized, and the pressure is 0.5 atmosphere (relative pressure); the hydrogen pressure of the fuel cell power generation system is changed to 0.5-0.3 atmospheric pressure (relative pressure) from 0-10 KW output range; the fuel cell operating parameters are typically:
working temperature: the ambient temperature is 70 ℃;
the oxidant is atmospheric air;
the working pressure of the hydrogen is 0.5-0.3 atmospheric pressure;
the output power is 0-10 KW;
the normally closed (drainage) electromagnetic valve drains water once every 3 minutes, and the drainage time is 1-2 seconds.
The fuel cell power generation system can operate very stably.
Example 2
Referring to fig. 2 and 5 in conjunction with fig. 1, in an embodiment of the fuel cell, the flow guiding grooves 112 on the hydrogen guiding flow plate 11 of the fuel cell stack are serpentine grooves from top to bottom, and hydrogen flows from top to bottom along the direction of gravity P in the hydrogen guiding flow plate 11. The electrode hydrogen-side operating pressure in the fuel cell stack 1 of the present embodiment is higher than the electrode air-side operating pressure by 1 atmosphere. The normally closed electromagnetic valve of the embodiment is opened once every 360 seconds in the operation process of the fuel cell, and the opening duration time is 2-5 seconds. Other structures and parameters of this embodiment are the same as those of embodiment 1.
Example 3
As shown in fig. 3 and 4 in combination with fig. 1, a fuel cell capable of improving hydrogen utilization rate in an embodiment of the fuel cell, the hydrogen gas-steam separator 6 may be omitted, and the normally closed solenoid valve 14 is directly connected to the hydrogen gas main outlet pipe of the fuel cell stack 1, and the rest is the same as that in embodiment 1.
Claims (4)
1. A fuel cell capable of improving the utilization rate of hydrogen comprises a fuel cell stack, a hydrogen storage device, a pressure reducing valve, an air filtering device, an air compression supply device, a hydrogen water-steam separator, an air water-steam separator, a water tank, a cooling fluid circulating pump, a radiator, a hydrogen humidifying device, an air humidifying device and a hydrogen pressure stabilizing valve.
2. The fuel cell of claim 1, wherein the pressure of the hydrogen supplied to the fuel cell stack is a pressure of the hydrogen after passing through a pressure reducing valve, a hydrogen pressure maintaining valve and a hydrogen humidifying device, and the pressure is greater than atmospheric pressure.
3. The fuel cell of claim 1, wherein the working pressure of the hydrogen side of the electrode in the fuel cell stack is 0.1 to 1 atm higher than the working pressure of the air side of the electrode.
4. The fuel cell capable of improving the hydrogen utilization rate according to claim 1, wherein the normally closed electromagnetic valve is opened once every 5 to 600 seconds in the operation process of the fuel cell, and the opening duration is 1 to 5 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100536316A CN100414752C (en) | 2004-08-11 | 2004-08-11 | Fuel cell capable of improving hydrogen utilization rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100536316A CN100414752C (en) | 2004-08-11 | 2004-08-11 | Fuel cell capable of improving hydrogen utilization rate |
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| Publication Number | Publication Date |
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| CN1734815A true CN1734815A (en) | 2006-02-15 |
| CN100414752C CN100414752C (en) | 2008-08-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742671A (en) * | 2014-12-11 | 2016-07-06 | 上海汽车集团股份有限公司 | Intermittent hydrogen discharge system for anode of fuel system and control method of intermittent hydrogen discharge system |
| CN107302098A (en) * | 2016-03-30 | 2017-10-27 | 上海神力科技有限公司 | A kind of fuel cell pack of fluid distribution pipe cross section gradual change |
| CN114094136A (en) * | 2020-06-30 | 2022-02-25 | 未势能源科技有限公司 | Buffer diffusion steam-water separator, laboratory and fuel cell tail gas discharge device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293661C (en) * | 2000-12-05 | 2007-01-03 | 松下电器产业株式会社 | Polyelectrolyte type fuel cell and operation method therefor |
| CN1225052C (en) * | 2001-10-12 | 2005-10-26 | 上海神力科技有限公司 | Cotrol device capable of making low power proton exchange membrane fuel cell safely operate |
| CN2718794Y (en) * | 2004-08-11 | 2005-08-17 | 上海神力科技有限公司 | Fuel cell capable of raising utilization ratio of hydrogen |
-
2004
- 2004-08-11 CN CNB2004100536316A patent/CN100414752C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742671A (en) * | 2014-12-11 | 2016-07-06 | 上海汽车集团股份有限公司 | Intermittent hydrogen discharge system for anode of fuel system and control method of intermittent hydrogen discharge system |
| CN105742671B (en) * | 2014-12-11 | 2018-11-30 | 上海汽车集团股份有限公司 | Anode of fuel cell interval row's hydrogen system and its control method |
| CN107302098A (en) * | 2016-03-30 | 2017-10-27 | 上海神力科技有限公司 | A kind of fuel cell pack of fluid distribution pipe cross section gradual change |
| CN114094136A (en) * | 2020-06-30 | 2022-02-25 | 未势能源科技有限公司 | Buffer diffusion steam-water separator, laboratory and fuel cell tail gas discharge device |
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| CN100414752C (en) | 2008-08-27 |
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