CN115193625B - Spraying fixture and spraying method for fuel cell membrane electrode - Google Patents
Spraying fixture and spraying method for fuel cell membrane electrode Download PDFInfo
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- CN115193625B CN115193625B CN202210967854.1A CN202210967854A CN115193625B CN 115193625 B CN115193625 B CN 115193625B CN 202210967854 A CN202210967854 A CN 202210967854A CN 115193625 B CN115193625 B CN 115193625B
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- Prior art keywords
- spraying
- ccm
- adsorption
- membrane electrode
- positioning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inert Electrodes (AREA)
Abstract
The invention discloses a spraying fixture and a spraying method of a fuel cell membrane electrode, wherein the spraying fixture comprises a spraying fixture body, the spraying fixture body is provided with a lower notch, the lower notch is obliquely arranged, and the spraying method comprises the following steps: cutting a proton membrane with a required size; placing the cut proton membrane on an adsorption tray of a spraying machine for adsorption positioning; positioning a spraying fixture on the upper side of the proton membrane, and starting a spraying machine to spray so as to obtain CCM; removing a protective layer on the CCM after the first surface spraying is finished, attaching the CCM on the carbon paper, and then adsorbing the carbon paper on an adsorption tray of a spraying machine; overlapping and positioning a lower notch of the spraying clamp and a catalytic layer area on the back of the CCM; starting a spraying machine to spray the CCM area on the inner side of the spraying clamp to obtain a fuel cell membrane electrode; the method can avoid irreversible damage to the membrane electrode caused by tearing the membrane electrode due to wrinkling and air bubble phenomenon generated by adsorption on the other side of the membrane electrode.
Description
Technical Field
The invention relates to the technical field of proton exchange membrane fuel cell manufacturing, in particular to a spraying fixture and a spraying method for a membrane electrode of a fuel cell.
Background
The hydrogen energy is taken as a new clean, efficient and sustainable energy source, is regarded as the next generation energy source with the highest potential, has the advantages of high efficiency, cleanliness, low working temperature, high energy density and the like when being taken as an ideal mode of the hydrogen energy in the proton exchange membrane fuel cell, is an ideal clean energy source, and plays an important role because the membrane electrode is a key part for determining the performance of the fuel cell.
In the patent publication CN201811406890, a fuel cell membrane electrode spraying fixture and the method thereof are described, the related magnet, bolt, foot pad and the like are matched, the fixture is relatively complex, the operation process is relatively difficult, and the preparation efficiency of the membrane electrode is affected. Meanwhile, the patent does not relate to a protective layer of carbon paper, and there is a risk of wrinkles or bubbles when preparing the second catalytic layer.
Most of the prior art is to directly remove the protective film after the preparation of the catalytic layer on one side with the protective film is completed, reversely rotate one side of the catalytic layer which is not prepared with the CCM, adsorb the CCM on the adsorption tray, so that the CCM is difficult to position, and bubbles appear during adsorption due to the easy deformation of the CCM, and only the bubbles and folds can be removed by stretching and tearing the CCM, thus the irreversible deformation of the CCM and the damage of the catalytic layer on one side of the prepared catalytic layer are easily caused.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a spraying clamp and a spraying method for a fuel cell membrane electrode, which can avoid irreversible damage to the membrane electrode caused by the phenomenon of wrinkling and bubbles generated by adsorption on the other side of the membrane electrode, and meanwhile, the spraying clamp with an inclined angle can improve the utilization rate of slurry and the production efficiency.
The aim of the invention can be achieved by the following technical scheme:
The spray fixture for the fuel cell membrane electrode comprises a spray fixture body, wherein a spray frame opening is formed in the middle of the spray fixture body, lower notch is formed in the periphery of the inner side of the spray frame opening, and the lower notch is obliquely arranged, and the inclination angle is 0-60 degrees.
As a further scheme of the invention: the thickness of the spraying fixture body is 3-10mm.
A method of spraying a fuel cell membrane electrode comprising the steps of:
step one, cutting: cutting a proton membrane with a required size according to the requirement, wherein one side of the proton membrane is provided with a protective layer;
Step two, positioning for the first time: placing the cut proton membrane on an adsorption tray of a spraying machine for adsorption positioning;
Step three, spraying the first surface: positioning a spraying fixture on the upper side of the proton membrane, starting a spraying machine to spray, and spraying catalytic slurry on the first surface to form a catalytic layer to obtain a CCM;
Step four, adsorption: after the first surface spraying is finished, preparing carbon paper, manually pulling the CCM, removing a protective layer on the CCM, attaching one side of the CCM with a catalytic layer to one side of the carbon paper, and then adsorbing the carbon paper with the CCM on an adsorption tray of a spraying machine;
Fifth, positioning for the second time: overlapping and positioning a lower notch of the spraying clamp and a catalytic layer area on the back of the CCM, closing suction force of an adsorption tray in the positioning process, manually moving the spraying clamp and the carbon paper to perform overlapping and positioning, then opening the suction force of the adsorption tray, observing the position and adsorption flatness of the CCM, closing the suction force of the adsorption tray if wrinkles and bubbles exist, taking down the spraying clamp, pulling up the CCM and reattaching the CCM on the carbon paper, and repeating the operation to perform positioning;
Step six, spraying a second surface: starting the spraying machine to spray the CCM area on the inner side of the spraying clamp, and spraying catalytic slurry on the second surface to form a catalytic layer to obtain the fuel cell membrane electrode.
As a further scheme of the invention: the protective layer in step one includes, but is not limited to, a PET protective layer.
As a further scheme of the invention: in the second step, the surface of the proton membrane with the protective layer is contacted with the adsorption tray.
As a further scheme of the invention: and in the fourth step, the suction force of the suction tray is sucked from the middle part to the two sides, so that the flatness of the CCM is ensured.
As a further scheme of the invention: the vacuum degree of the adsorption tray is 0-0.2 kpa, and the temperature of the spraying adsorption tray is 80-100 ℃.
The invention has the beneficial effects that:
According to the invention, an adsorption process is added in a spraying method, namely after the first surface spraying is finished, carbon paper is prepared, a protective layer on the CCM is removed under the condition of no adsorption force (avoiding irreversible deformation of a membrane electrode caused by adsorption), one side of the CCM with a catalytic layer is attached to one side of the carbon paper, then the carbon paper with the CCM is adsorbed on an adsorption tray of a spraying machine, and when a proton membrane with the carbon paper is placed, the middle area is firstly contacted with the adsorption tray. When the adsorption is carried out, the suction force of the adsorption tray can be adsorbed from the middle part to the two sides, the operation method can expel bubbles between the plasma membrane and the carbon paper, ensures the flatness of CCM, can effectively avoid the phenomenon of tearing the membrane electrode due to the phenomenon of wrinkling and bubbles generated by the adsorption of the other side of the membrane electrode, and causes irreversible damage of the membrane electrode, and meanwhile, the designed spraying fixture with the inclined angle can improve the utilization rate of slurry and the production efficiency.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic process diagram of the overall spray coating process of the present invention;
FIG. 2 is a schematic view of a spray fixture according to the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a spray fixture according to the present invention;
Fig. 4 is a process schematic of a prior art spray coating method.
In the figure: 10. a spray fixture body; 11. a lower notch.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 4, a spraying method of a fuel cell membrane electrode includes the steps of:
Step one, cutting: cutting a proton membrane with a required size according to the requirement, wherein one side of the proton membrane is provided with a protective layer, and the protective layer comprises, but is not limited to, a PET protective layer;
Step two, positioning for the first time: placing the cut proton membrane on an adsorption tray of a spraying machine for adsorption positioning, wherein one surface of the proton membrane with a protective layer is contacted with the adsorption tray;
Step three, spraying the first surface: positioning a spraying fixture on the upper side of a proton membrane, starting a spraying machine to spray, and spraying catalytic slurry on a first surface (a surface without a protective layer) to form a catalytic layer, so as to obtain a CCM;
Step four, adsorption: after the first surface spraying is finished, preparing carbon paper, manually pulling the CCM, removing a protective layer on the CCM, attaching one side of the CCM with a catalytic layer to one side of the carbon paper, and then adsorbing the carbon paper with the CCM on an adsorption tray of a spraying machine, wherein the suction force of the adsorption tray is adsorbed from the middle to two sides during adsorption, so that the flatness of the CCM is ensured;
Fifth, positioning for the second time: overlapping and positioning a lower notch 11 of the spraying clamp and a catalytic layer area on the back of the CCM, closing the suction force of an adsorption tray in the positioning process, manually moving the spraying clamp and the carbon paper to perform overlapping and positioning, then opening the suction force of the adsorption tray, observing the position and adsorption flatness of the CCM, closing the suction force of the adsorption tray if the phenomenon of wrinkles and bubbles exists, taking down the spraying clamp, pulling up the CCM and reattaching the CCM on the carbon paper, and repeating the operation to perform positioning;
Step six, spraying a second surface: starting the spraying machine to spray the CCM area on the inner side of the spraying clamp, spraying the catalytic slurry on the second surface (the surface with the original protective layer) to form a catalytic layer, and finishing the whole spraying to obtain the fuel cell membrane electrode.
Further, the spraying fixture of the fuel cell membrane electrode comprises a spraying fixture body 10, a spraying frame opening is formed in the middle of the spraying fixture body 10, lower notch 11 is formed in the periphery of the inner side of the spraying frame opening, the lower notch 11 is obliquely arranged, the inclination angle is 0-60 degrees, handles are symmetrically arranged on two opposite angles on one side face of the spraying fixture body 10, and the fixture is convenient to move.
When further spraying is carried out, the area surrounded by the lower notch 11 of the spraying clamp coincides with the effective area of the membrane electrode spraying, so that the accuracy of spraying is ensured.
The length of each side of the adsorption area of the further adsorption tray is 1-3 mm greater than that of each side of the carbon paper, the length of each side of the outer side edge of the spraying clamp body 10 is 1-3 mm greater than that of each side of the adsorption area of the adsorption tray, the perfection of spraying is ensured, and the thickness of the spraying clamp body 10 is 3-10mm.
The multi-empty layer of the further carbon paper is contacted with one side of the CCM, which is provided with the catalytic layer, and the adsorption tray is opened, so that the carbon paper attached with the CCM is placed in the middle area, the adsorption of the CCM is started from the middle, and bubbles are sequentially removed, so that the phenomenon of wrinkling and bubbling of the CCM is avoided.
Wherein the vacuum degree of the adsorption tray is 0-0.2 kpa, and the temperature of the spraying adsorption tray is 80-100 ℃.
Further operation is performed on the carbon paper when CCM protective layer removal is performed after spraying of one side of the proton membrane is finished, so that adhesion force is provided between the CCM and the carbon paper, and meanwhile, when the CCM is wrinkled or edge bubble phenomenon occurs, the adsorption tray is closed, and subsequent operation is performed outside the spraying platform.
Embodiment one:
The thickness of the spraying fixture body 10 is 1mm, and the spraying method is used for spraying;
Embodiment two:
The thickness of the spraying fixture body 10 is 10mm, the lower notch 11 has no inclination angle, and the spraying method is used for spraying;
Embodiment III:
the thickness of the spraying fixture body 10 is 10mm, the inclination angle of the lower notch 11 is set to be 45 degrees, and the spraying method is used for spraying;
Embodiment four:
The thickness of the spraying fixture body 10 is 10mm, the inclination angle of the lower notch 11 is set to be 45 degrees, and the spraying fixture body is sprayed by using a spraying method in the prior art;
According to the data, when the spraying method in the prior art is used, the membrane electrode has the phenomenon of folds and bubbles, and when the membrane electrode catalytic layer is prepared, bubbles or folds are required to be torn off from CCM, so that the CCM is easy to damage, when the spraying method in the invention is used, the membrane electrode has no phenomenon of folds and bubbles, and the membrane electrode catalytic layer does not need to tear to remove bubbles or folds to CCM when preparing, can not cause the damage to CCM, and further when spraying anchor clamps body 10 thickness is 10mm, and lower notch 11 inclination sets up to 45, and catalytic slurry utilization ratio and CCM thickness homogeneity are better.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (2)
1. The spraying method of the fuel cell membrane electrode uses a spraying fixture, the spraying fixture comprises a spraying fixture body (10), a spraying frame opening is formed in the middle of the spraying fixture body (10), lower notch (11) is formed around the inner side of the spraying frame opening, the lower notch (11) is obliquely arranged, the inclination angle is 0-60 degrees, and the thickness of the spraying fixture body (10) is 3-10mm; the method is characterized by comprising the following steps of:
step one, cutting: cutting a proton membrane with a required size according to the requirement, wherein one side of the proton membrane is provided with a protective layer;
Step two, positioning for the first time: placing the cut proton membrane on an adsorption tray of a spraying machine for adsorption positioning; wherein, the surface of the proton membrane with the protective layer is contacted with the adsorption tray;
Step three, spraying the first surface: positioning a spraying fixture on the upper side of the proton membrane, starting a spraying machine to spray, and spraying catalytic slurry on the first surface to form a catalytic layer to obtain a CCM;
Step four, adsorption: after the first surface spraying is finished, preparing carbon paper, manually pulling the CCM, removing a protective layer on the CCM, attaching one side of the CCM with a catalytic layer to one side of the carbon paper, and then adsorbing the carbon paper with the CCM on an adsorption tray of a spraying machine;
Fifth, positioning for the second time: overlapping and positioning a lower notch (11) of the spraying clamp and a catalytic layer area on the back of the CCM;
Step six, spraying a second surface: starting a spraying machine to spray a CCM area on the inner side of the spraying clamp, and spraying catalytic slurry on the second surface to form a catalytic layer to obtain a fuel cell membrane electrode;
The suction force of the suction tray is sucked from the middle part to the two sides, so that the flatness of the CCM is ensured;
the vacuum degree of the adsorption tray is 0-0.2 kpa, and the temperature of the spraying adsorption tray is 80-100 ℃.
2. The method of claim 1, wherein the protective layer in step one comprises a PET protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210967854.1A CN115193625B (en) | 2022-08-12 | 2022-08-12 | Spraying fixture and spraying method for fuel cell membrane electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210967854.1A CN115193625B (en) | 2022-08-12 | 2022-08-12 | Spraying fixture and spraying method for fuel cell membrane electrode |
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| Publication Number | Publication Date |
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| CN115193625A CN115193625A (en) | 2022-10-18 |
| CN115193625B true CN115193625B (en) | 2024-09-17 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109755595A (en) * | 2018-12-26 | 2019-05-14 | 武汉喜玛拉雅光电科技股份有限公司 | A kind of spraying method of fuel cell membrane electrode |
| CN112531188A (en) * | 2020-12-08 | 2021-03-19 | 安徽枡水新能源科技有限公司 | Preparation method of fuel cell membrane electrode |
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| EP1403949B1 (en) * | 2002-09-30 | 2008-05-21 | Umicore AG & Co. KG | Catalyst-coated ionomer membrane with protective film layer and membrane-electrode-assembly made thereof |
| US20060078781A1 (en) * | 2004-10-08 | 2006-04-13 | 3M Innovative Properties Company | Curable subgasket for a membrane electrode assembly |
| CN100515566C (en) * | 2005-12-12 | 2009-07-22 | 比亚迪股份有限公司 | A kind of preparation method of catalyst coating film |
| CN110125866B (en) * | 2019-05-30 | 2021-03-23 | 安徽元隽氢能源研究所有限公司 | Tooling for assembling MEA (membrane electrode assembly) and assembling method using tooling |
| CN110311151B (en) * | 2019-07-05 | 2020-11-20 | 深圳市南科燃料电池有限公司 | Method for producing sealed catalyst-coated membranes |
| CN210815860U (en) * | 2019-07-17 | 2020-06-23 | 佛山市清极能源科技有限公司 | CCM membrane electrode spraying fixture and lower fixture thereof |
| TWI721740B (en) * | 2019-12-31 | 2021-03-11 | 台灣聯合氫能股份有限公司 | Sealing structure for membrane electrode assembly of fuel cell and manufacturing method thereof |
| CN211801844U (en) * | 2020-01-16 | 2020-10-30 | 绍兴天喆能源科技有限公司 | Lifting type spraying platform on spraying machine for fuel cell |
| CN215465442U (en) * | 2021-07-08 | 2022-01-11 | 航天氢能(上海)科技有限公司 | A fuel cell catalyst spraying fixture |
| CN216826813U (en) * | 2021-12-24 | 2022-06-28 | 新源动力股份有限公司 | Integrated vacuum adsorption clamp for CCM preparation of fuel cell |
| CN217140835U (en) * | 2022-01-27 | 2022-08-09 | 浙江天能氢能源科技有限公司 | Spraying tool for producing fuel cell membrane electrode assembly |
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2022
- 2022-08-12 CN CN202210967854.1A patent/CN115193625B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755595A (en) * | 2018-12-26 | 2019-05-14 | 武汉喜玛拉雅光电科技股份有限公司 | A kind of spraying method of fuel cell membrane electrode |
| CN112531188A (en) * | 2020-12-08 | 2021-03-19 | 安徽枡水新能源科技有限公司 | Preparation method of fuel cell membrane electrode |
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