CN107026275B - Component for improving battery operation stability - Google Patents
Component for improving battery operation stability Download PDFInfo
- Publication number
- CN107026275B CN107026275B CN201610071161.9A CN201610071161A CN107026275B CN 107026275 B CN107026275 B CN 107026275B CN 201610071161 A CN201610071161 A CN 201610071161A CN 107026275 B CN107026275 B CN 107026275B
- Authority
- CN
- China
- Prior art keywords
- diffusion layer
- fuel cell
- component
- guide plate
- flow guide
- Prior art date
- 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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- 239000000446 fuel Substances 0.000 claims abstract description 37
- 238000009792 diffusion process Methods 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims abstract description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 abstract description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
- H01M8/04149—Humidifying by diffusion, e.g. making use of membranes
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention relates to a component for improving the operation stability of a cell, which is used in the fuel cell, wherein the fuel cell comprises a flow guide plate, a gas diffusion layer and a membrane electrode, the gas diffusion layer comprises an air diffusion layer and a hydrogen diffusion layer, the component is made of a conductive material, is arranged between the flow guide plate and the air diffusion layer and is used for moisturizing a proton exchange membrane in the membrane electrode, and at least one through hole for introducing gas and liquid is arranged on the component. Compared with the prior art, the invention has the advantages of convenient use, low cost and the like.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a component for improving the operation stability of a cell.
Background
A fuel cell is an electrochemical device having the same composition as a general battery. The single cell is composed of a positive electrode and a negative electrode (a negative electrode, namely a fuel electrode, and a positive electrode, namely an oxidant electrode) and an electrolyte. Except that the active material of a general battery is stored inside the battery, and thus, the battery capacity is limited. The positive and negative electrodes of the fuel cell do not contain a reaction material, but are catalytic conversion elements. Fuel cells are thus well-known energy conversion machines that convert chemical energy into electrical energy. When the cell is operated, the fuel and the oxidant are supplied from the outside to react. In principle, the fuel cell can generate electricity continuously as long as reactants are continuously fed and reaction products are continuously discharged. The operating principle of the hydrogen-oxygen fuel cell is as follows:
negative electrode: h2→2H++2e-
And (3) positive electrode: 1/2O2+H++2e-→H2O
And (3) battery reaction: h2+1/2O2＝＝H2O
Due to the characteristics of high specific energy, environmental friendliness, compatibility with renewable energy sources and the like, the fuel cell has received great attention from governments, enterprises and research groups all over the world. The developed countries in the united states, the daily and the european countries continuously strengthen the support for the fuel cell field, and the related technologies break through continuously, so that the proton membrane fuel cell for vehicles has already begun to be commercially used.
Because the proton exchange membrane of the fuel cell needs moisture when conducting hydrogen protons, the traditional fuel cell humidifies the air and the hydrogen before entering the fuel cell, so that the structure of the fuel cell system is complex and the reliability is reduced. For example, chinese patent application 201210559773.4 discloses a membrane humidifier for a fuel cell, comprising a cylindrical housing, a humidifying tube, an air baffle and a hydrogen baffle; the humidifying pipe is of a two-layer structure, the outer layer is an aramid fiber paper pipe, the inner layer is a stainless steel screen mesh, and two ends of the humidifying pipe are respectively fixed on an air baffle and a hydrogen baffle and are sealed with the inside of the cylindrical shell to form a pipe side and a shell side. The device has complex structure and is inconvenient to use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a component which is convenient to use and low in cost and can improve the operation stability of a battery.
The purpose of the invention can be realized by the following technical scheme: the component for improving the operation stability of the cell is used in the fuel cell, the fuel cell comprises a flow guide plate, a gas diffusion layer and a membrane electrode, the gas diffusion layer comprises an air diffusion layer and a hydrogen diffusion layer, the component is made of a conductive material and is arranged between the flow guide plate and the air diffusion layer and used for moisturizing a proton exchange membrane in the membrane electrode, and at least one through hole for communicating gas and liquid is arranged on the component.
The conductive material is graphite paper.
The conductive material is a metal plate.
The thickness of the member is 0.01 to 2mm, and in this range, the appearance structure of the fuel cell to which the member is added is hardly changed.
The size of the component is matched with the size of the air diffusion layer.
The ratio of the area of the through holes to the area of the non-through holes on the component is 1: 1-1: 20, and in the ratio range, the component does not influence the power generation performance of the fuel cell, and can well moisturize the proton exchange membrane, so that the performance of the fuel cell is optimized.
Compared with the prior art, the invention has the following advantages:
(1) the invention is added outside the gas diffusion layer of the fuel cell, so that the moisture generated by the reaction can be kept inside the cell, the gas is prevented from being humidified by an additional humidifier, and the structure is simple;
(2) the ratio of the area of the through holes on the component to the area of the non-through holes on the component is 1: 1-1: 20, and in the ratio range, the component does not influence the power generation performance of the fuel cell, and can well moisturize the proton exchange membrane, so that the performance of the fuel cell is optimized;
(3) the thickness of the member of the present invention is 0.01 to 2mm, and in this range, the appearance structure of the fuel cell to which the member is added is hardly changed;
(4) the invention has low cost and convenient use, and is suitable for large-scale popularization and use.
Drawings
Fig. 1 is a schematic diagram of a fuel cell incorporating a component for improving the operational stability of the cell according to the present invention;
FIG. 2 is a graph of performance of a fuel cell incorporating a component of the present invention that improves the operational stability of the cell;
FIG. 3 is a performance curve of a fuel cell not incorporating the present invention;
the labels in the figure are: 1 membrane electrode, 2 air diffusion layers, 3 hydrogen diffusion layers, 4 parts, 5 air guide plates and 6 hydrogen guide plates.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
A part for improving the running stability of a cell is used in the fuel cell, the existing fuel cell is an air guide plate 5, an air diffusion layer 2, a membrane electrode 1, a hydrogen diffusion layer 3 and a hydrogen guide plate 6 which are sequentially arranged, a part 4 made of a conductive material is added between the air guide plate 5 and the air diffusion layer 2, as shown in figure 1, the part 4 is used for moisturizing a proton exchange membrane in the membrane electrode 1, and at least one through hole for ventilating liquid is arranged on the part 4. The member 4 of this example was graphite paper with a thickness of 0.01mm, and the dimensions of the member 4 were matched to those of the air diffusion layer 5. The ratio of the area of the through-holes to the area of the non-through-holes on the component 4 is 1: 1.
This example assembles a stack of 22 cells by stacking fuel cells in a stack of individual cells. The operating temperature of the cell stack was 62 degrees, and a fan was used for oxygen supply and heat dissipation. The results of the operation in which the component 4 of the present invention was added to the single cells of one stack and the other was not added are shown in fig. 2 and 3, in which fig. 2 is a performance curve of the fuel cell to which the component 4 of the present invention was added, and fig. 3 is a performance curve of the fuel cell to which the component 4 of the present invention was not added, and it can be seen from a comparison of fig. 2 and 3 that the performance of the cell was improved and the stable operation was enabled for a long period of time after the component 4 was added.
Example 2
In this example, the member 4 was a metal plate having a thickness of 2mm, and the ratio of the area of the through-holes in the member 4 to the area of the non-through-holes in the diffusion layer of the diffusion layer 4 was 1:20, as in example 1.
Example 3
In this example, the thickness of the member 4 was 0.5mm, and the ratio of the area of the through-holes in the member 4 to the area of the non-through-holes in the member 4 was 1:10, as in example 1.
Claims (3)
1. A part for improving the operation stability of a cell is used in the fuel cell, the fuel cell comprises a flow guide plate, a gas diffusion layer and a membrane electrode, the gas diffusion layer comprises an air diffusion layer and a hydrogen diffusion layer, the flow guide plate comprises an air flow guide plate and a hydrogen flow guide plate, and the part is made of graphite paper or a metal plate, is arranged between the air flow guide plate and the air diffusion layer and is used for moisturizing a proton exchange membrane in the membrane electrode, at least one through hole for introducing gas and liquid is arranged on the part, and the ratio of the area of the through hole to the area of a non-through hole on the part is 1: 1-1: 20.
2. The member for improving operational stability of a battery as claimed in claim 1, wherein the member has a thickness of 0.01 to 2 mm.
3. The member for improving operational stability of a battery as claimed in claim 1, wherein the size of the member is matched to the size of the air diffusion layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071161.9A CN107026275B (en) | 2016-02-01 | 2016-02-01 | Component for improving battery operation stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071161.9A CN107026275B (en) | 2016-02-01 | 2016-02-01 | Component for improving battery operation stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107026275A CN107026275A (en) | 2017-08-08 |
| CN107026275B true CN107026275B (en) | 2019-12-31 |
Family
ID=59524568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610071161.9A Active CN107026275B (en) | 2016-02-01 | 2016-02-01 | Component for improving battery operation stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107026275B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987335B (en) * | 2020-09-08 | 2025-01-24 | 山东济燃氢动力有限公司 | Fuel cell membrane humidifier and fuel cell device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1063717A2 (en) * | 1999-06-22 | 2000-12-27 | SANYO ELECTRIC Co., Ltd. | Stable and high-performance fuel cell |
| CN1684294A (en) * | 2004-04-14 | 2005-10-19 | 上海神力科技有限公司 | A self-radiating and self-humidifying fuel cell stack with high power density |
| CN200965892Y (en) * | 2006-07-07 | 2007-10-24 | 上海攀业氢能源科技有限公司 | Fuel battery composite gas-diffusion-layer |
| CN101364646A (en) * | 2007-08-08 | 2009-02-11 | 上海攀业氢能源科技有限公司 | Fuel cell electrode having aqueous vapor separation layer |
| CN103531821A (en) * | 2012-07-05 | 2014-01-22 | 清华大学 | Membrane electrode and fuel cell using membrane electrode |
-
2016
- 2016-02-01 CN CN201610071161.9A patent/CN107026275B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1063717A2 (en) * | 1999-06-22 | 2000-12-27 | SANYO ELECTRIC Co., Ltd. | Stable and high-performance fuel cell |
| CN1684294A (en) * | 2004-04-14 | 2005-10-19 | 上海神力科技有限公司 | A self-radiating and self-humidifying fuel cell stack with high power density |
| CN200965892Y (en) * | 2006-07-07 | 2007-10-24 | 上海攀业氢能源科技有限公司 | Fuel battery composite gas-diffusion-layer |
| CN101364646A (en) * | 2007-08-08 | 2009-02-11 | 上海攀业氢能源科技有限公司 | Fuel cell electrode having aqueous vapor separation layer |
| CN103531821A (en) * | 2012-07-05 | 2014-01-22 | 清华大学 | Membrane electrode and fuel cell using membrane electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107026275A (en) | 2017-08-08 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201401 Building 2, No. 88, Huancheng North Road, industrial comprehensive development zone, Fengxian District, Shanghai Patentee after: Shanghai panye Hydrogen Energy Technology Co.,Ltd. Address before: 201401 Building 2, No. 88, Huancheng North Road, industrial comprehensive development zone, Fengxian District, Shanghai Patentee before: Shanghai Panye Hydrogen Energy Technology Co.,Ltd. |