CN114864979A - Method for preparing metal separator for fuel cell vehicle - Google Patents
Method for preparing metal separator for fuel cell vehicle Download PDFInfo
- Publication number
- CN114864979A CN114864979A CN202111054403.0A CN202111054403A CN114864979A CN 114864979 A CN114864979 A CN 114864979A CN 202111054403 A CN202111054403 A CN 202111054403A CN 114864979 A CN114864979 A CN 114864979A
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- Prior art keywords
- plate
- perforated
- roller
- porous plate
- metal separator
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/023—Porous and characterised by the material
- H01M8/0232—Metals or alloys
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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
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- 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)
- Fuel Cell (AREA)
Abstract
The present invention relates to a method for manufacturing a metal separator composed of an anode plate, a porous plate and a cathode plate attached in a stacked structure with each other, and more particularly, in the method for manufacturing a metal separator in which an anode plate, a porous plate and a cathode plate are sequentially stacked and combined, comprising: 1) a step of forming a mesh-like perforated portion on the outer surface of a material unwound in a roll form, and then cutting both sides of the material by a cutting portion to obtain a porous plate; 2) placing a porous plate on the upper surface of the anode plate for spot welding; 3) a step of placing a cathode plate on the anode plate and the spot-welded upper portion of the porous plate, and thermally bonding them to each other to obtain a metal separator, wherein the porous plate is characterized in that the material is introduced between a punching roller, which rotates and whose outer surface is formed with a plurality of protrusions at the same interval in the longitudinal direction, and a support roller, which rotates transversely opposite to the punching roller, to form the punched portion by pressing of the protrusions, to make the material contact.
Description
Technical Field
The present invention relates to a method of manufacturing a metal separator including an anode plate, a porous plate, and a cathode plate attached to each other in a stacked structure.
Background
In general, a basic structure of a fuel cell is a structure in which a membrane-electrode assembly (MEA) in which electrochemical reactions occur, a Gas Diffusion Layer (GDL) as a porous medium for uniformly distributing reaction gas to the membrane-electrode assembly, and separators are alternately and repeatedly stacked.
Among Fuel cells, a Polymer Electrolyte Membrane Fuel Cell (PEMFC) is a power generation device that directly generates electric energy through a hydrogen-oxygen electrochemical reaction.
In the polymer electrolyte membrane fuel cell, hydrogen is supplied through an anode (anode) as a fuel electrode, oxygen is supplied to a cathode (cathode) as an air electrode, and the hydrogen supplied to the fuel electrode is separated into hydrogen ions and electrons by electrode layers formed on both sides of the electrolyte.
The hydrogen ions pass through the electrolyte membrane to the air electrode, and the electrons are collected through the separator by an external lead to generate an electric current.
Then, the hydrogen ions transferred to the air electrode are combined with oxygen in the supplied air to form water.
The separator collects and transfers generated current, prevents direct contact of hydrogen and oxygen, prevents danger of explosion and combustion, and serves as a structural body for transporting reaction gases and products, transferring reaction heat, and combining electrodes, catalysts, and gas diffusion layers.
The porous separator improves fuel distribution and electrochemical performance of the fuel cell, but the overall shape and structure are very complicated, and the separator is difficult to form and mass-produce due to the complicated shape.
The porous separator is manufactured by an etching process or a stamping process, which requires a large amount of manufacturing cost and manufacturing time, and it is difficult to manufacture precise and variously shaped porous separators due to limitations of molding.
Documents of the prior art
Patent document
Korean laid-open patent No. 10-2015-
Disclosure of Invention
Problems to be solved
In order to solve the above-mentioned problems of the prior art, the present invention is directed to providing a method of manufacturing a metal separator, which is obtained by easily forming a porous plate between an anode plate and a cathode plate, thereby shortening the process time for manufacturing the metal separator while enabling the manufacture of a high-quality metal separator.
Means for solving the problems
In order to solve the above-mentioned technical problems, the method for manufacturing a metal separator for a fuel cell vehicle according to the present invention includes the steps of: 1) a step of obtaining the porous plate 10 by forming a mesh-like perforated portion 11 on the outer surface of a material 40 unwound from a roll and then cutting both sides of the material 40 with a cutting portion 130; 2) a step of placing the porous plate 10 on the upper surface of the anode plate 20 and performing spot welding; and 3) a step of placing the cathode plate 30 on the upper portions of the anode plate 20 and the spot-welded porous plate 10 and thermally bonding them to each other to obtain a metal separator (M/S), wherein in the porous plate 10, the material 40 is introduced between a punching roller 110 and a supporting roller 120 to contact the material 40, the punching roller 110 is rotated and the outer surface thereof is formed with a plurality of protrusions 111 having the same interval in the longitudinal direction, and the supporting roller 120 is rotated transversely opposite to the punching roller 110 to form the punched parts 11 by pressing of the protrusions 111.
Further, it is preferable that the circumferential surface of the perforation roller 110 is formed with a space surface 113 having a predetermined length width D1 so that flat portions 41 having a predetermined length width D2 can be formed on both sides of the perforation portion 11 by pressing of the protrusion portion 111, and the cutting portion 130 has a pair of predetermined length widths D5 adjacent to each other, and cuts the pair of flat portions 41 formed on both sides of the material 40 to obtain the porous plate 10.
Preferably, the cutting part 130 cuts the material 40 so that the length width D2 of the flat part 41 can be equally divided into two parts at the same pitch, and welding surfaces 13 for spot welding can be formed on both sides of the breaker plate 10 with the perforated part 11 as a reference.
Preferably, the length width D4 of the pair of flat portions 41 formed on the material 40 is the same as the circumferential length C1 of the perforated roll 110, and the length width D3 of the perforated portion 11 formed on the material 40 is the same as the circumferential length C2 of the perforated roll 110 except for the length width D1 of the space surface 113 in the circumferential length C1.
Further, it is preferable that the support roller 120 not only prevents the support roller 120 from being damaged by the pressing of the protrusion 111, but also, in order to facilitate the formation of the perforated portion 11, the outer surface of the support roller 120 is covered with a replaceable buffer member 121, and an elastic body 123 applying an elastic force upward is inserted through the outer surface thereof, so that the vibration of the protrusion 111 pressed downward can be absorbed.
Effects of the invention
According to the present invention, unlike the conventional art, by using a punching roll having protrusions of different circumferential lengths and forming a space surface, and a support roll rotating in a lateral direction opposite to the punching roll, not only a punched part is formed on a material unwound in one direction in a roll shape, but also a flat part for a welded surface is rapidly formed, and then a porous plate is formed by cutting of a cutting part and is attached between an anode plate and a cathode plate to mold a metal separator, thereby shortening the process time for molding the metal separator, and having the effects of mass-producibility and providing a good-quality product.
Drawings
Fig. 1 is a flow chart of a method for manufacturing a metal separator for a fuel cell vehicle according to the present invention;
FIG. 2 is a diagram showing a perforating roller and a backup roller for forming the perforated portion and the flat portion of the material of FIG. 1;
FIG. 3 is a diagram illustrating the perforating roll of FIG. 2;
FIG. 4 is a view showing that a perforated plate is obtained using the cutting part of FIG. 1;
FIGS. 5 and 6 are views showing spot welding of the porous plate obtained in FIG. 1 with an anode plate;
fig. 7 is a view showing that a cathode plate is attached to the upper portion of the perforated plate spot-welded in fig. 1.
Description of the reference numerals
1: the method for preparing the metal separator for a fuel cell vehicle according to the present invention
10: perforated plate 11: perforation part
13: welding surface 20: anode plate
21: passage 30: negative plate
40: material 41: flat part
110: perforated roller 111: projection part
113: the space surface 120: support roller
121: the buffer member 123: elastic body
130: the cutting part 140: welding machine
Detailed Description
Hereinafter, other objects and features of the present invention will become apparent from the description of the embodiments with reference to the drawings, unless otherwise defined, and all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Hereinafter, a method for manufacturing a metal separator for a fuel cell vehicle (hereinafter, simply referred to as "manufacturing method") according to the present invention will be described in detail with reference to the accompanying drawings.
First, as shown in fig. 1, a production method 1 according to the present invention roughly includes: 1) s100, forming a mesh-shaped perforated part on the outer surface of a material which is unwound in a roll shape, and then cutting two sides of the material through a cutting part to obtain the porous plate; 2) s200, placing the porous plate on the upper surface of the anode plate and performing spot welding; and 3) S300, placing the cathode plate on the upper parts of the perforated plate, which are spot-welded with the anode plate, and thermally bonding the cathode plate and the perforated plate with each other to obtain a metal separator.
In more detail, the step 1) S100 is a step of obtaining the porous plate 10 by forming a plurality of perforated portions 11 on the outer surface of the material 40.
For this, as shown in fig. 2 to 4, a material 40 made of a steel material is rotatably provided in the form of an expandable roll on a base (not shown) combined by a plurality of vertical and horizontal frames, etc., and can be transferred and expanded in one direction by the rotation of a motor, etc. provided to the base and a perforation roller 110 and a support roller 120, which are rotatably combined, respectively.
At this time, it is preferable that the perforated roll 110 and the support roll 120 are vertically installed on the base in a lateral direction (vertical direction in the drawing), the material 40 is introduced therebetween, and the material 40 is transferred in one direction by the rotation and pressing of the perforated roll 110 and the support roll 120 (refer to fig. 2).
Here, the outer surface of the perforation roller 110 has a projection 111 projecting in an outward direction so as to form a plurality of perforation portions 11 having the same interval on the outer surface of the material 40, and the plurality of perforation portions 11 having the web D3 of a predetermined length are formed on the outer surface of the material 40 conveyed in one direction by the projection 111.
Here, the perforated roller 110 has a circumferential surface formed with a space surface 113 having a predetermined length width D1 and not having the projecting portion 111, so that the pair of welding surfaces 13 are formed on the obtained porous plate 10 and can be spot-welded to the anode plate 20.
Therefore, when the material 40 introduced between the rotating punching roller 110 and the support roller 120 and conveyed is brought into contact with the protrusion 111 formed on the circumferential surface of the punching roller 110, the outer surface of the material 40 is punched to form the punched part 11, and only the pressing is performed at the portion where the space surface 113 is brought into contact with the outer surface of the material 40, thereby forming the flat part 41 to be formed on the perforated plate 10 on the outer surface of the material 40, and after the cutting process by the cutting part 130, not only the punched part 11 but also the welding surface 13 having the predetermined length width D2 identical to the length width D1 of the space surface 113 is formed on the outer surface of the perforated plate 10.
Further, the length width D3 of the perforated part 11 has the same length as the circumferential surface of the perforated roller 110, that is, the circumferential length C1 formed by the protruding part 111 excluding the circumferential length C2 of the space surface 113 formed on the outer surface of the perforated roller 110, and the operator can adjust the length width of the perforated part 11 by using the perforated roller 110 having different outer diameters (h1, h2) in accordance with the length width D3 of the perforated part 11 to be formed in the perforated plate 10 (see fig. 2).
For this, a base rotatably coupled with the perforation roller 110 is transversely formed with a rotation hole having a long hole shape, so that the perforation roller 110 having different outer diameters can be rotatably coupled with the upper portion of the support roller 120 mounted to the base in a fixed state.
At this time, as shown in the drawing, the circumferential length C1 of the perforation roller 110 is preferably formed in the same manner as the longitudinal width D4, and the longitudinal width D4 includes a pair of flat portions 41, and the flat portions 41 are formed on both sides of the perforated portion 11 formed in the material 40.
In this way, in a state where the plurality of perforated portions 11 and the flat portions 41 are formed on the outer surface of the material 40 by the protruding portions 111 and the space surfaces 113 of the perforation roller 110, when the material 40 is transferred and separated between the perforation roller 110 and the support roller 120, the cutting portions 130 including the pair of blades move toward the pair of flat portions 41, respectively, and the porous plate 10 having a predetermined area can be obtained.
In order to obtain the porous plate 10 by the control signal of the control unit, the pair of cutting units 130 is moved only at the first time to obtain the porous plate 10, and after the first porous plate 10 is obtained, only one of the cutting units 130 is moved to the flat portion 41, so that the other porous plates 10 can be obtained.
At this time, it is preferable that a pair or any one of the cutting portions 130 of the flat portion 41 is moved to cut the central portion of the length web D4 of the flat portion 41, and a pair of welding surfaces 13 is formed on each of the porous plates 10 to be obtained first and later based on the perforated portion 11, for this reason, the length web D5 adjacent between a pair of the cutting portions 130 has a length web in which each of the cutting portions 130 can be positioned at the central portion with respect to the area of the flat portion 41.
On the other hand, in the present invention, as shown in the drawing, the support roller 120 not only prevents the outer surface of the material 40 from being damaged, but also wraps the outer surface of the support roller 120 with a cushion member 121 so that the protrusion 111 perforated on the outer surface of the material 40 does not damage the outer surface of the support roller 120 when pressed, and the support roller 120 absorbs the vibration and the like which may occur during the formation of the perforated portion 11 by the elasticity of the elastic body 123 in the shape of a coil spring provided thereunder.
Therefore, the supporting roller 120 having the buffer member 121 is conveniently laterally contacted with the perforation roller 110 by the elastic force of the elastic body 123 applied upward, and the material 40 is introduced from the middle thereof, so that the material 40 can be conveniently transferred by the rotation and pressurization of the perforation roller 110 and the supporting roller 120.
In this case, the cushion member 121 in contact with the lower surface of the material 40 is preferably formed to have a thickness such that the protruding portion 111 does not directly contact the support roller 120 when penetrating the material 40, that is, the protruding portion may be formed to have a length longer than the protruding length of the protruding portion 111.
Then, as shown in fig. 5 and 6, step 2) S200 is a step of spot-welding the porous plate 10 and the anode plate 20 obtained in the above step 1) S100.
Thus, the perforated plate 10 is spot-welded by the welding machine 140 in a state where the lower surfaces of the pair of welding surfaces 13 and the upper surface of the anode plate 20 can be attached in contact with each other, and the perforated plate 10 is temporarily attached and fixed to the upper surface of the anode plate 20 before the cathode plate 30 described later is attached.
At this time, it is preferable that a plurality of channels 21 are formed in parallel or zigzag on the outer surface of the anode plate 20 to provide a path through which hydrogen gas moves.
Finally, in step 3) S300, as shown in fig. 7, the cathode plate 30 is attached to the upper portion of the porous plate 10 fixed to the upper portion of the anode plate 20 by spot welding or the like, completing the preparation of the metal separator (M/S).
As described above, according to the manufacturing method 1 of the present invention, unlike the conventional art, not only the perforated part 11 but also the flat part 41 for the welding surface 13 are rapidly formed on the material 40 rolled out in one direction by the perforated roller 110 having the protrusions 111 and the space surface 113 of different circumferences and the support roller 120 rotating in a lateral direction relative to the perforated roller 110, and then the porous plate 10 is formed by cutting of the cutting part 130 and the metal separator (M/S) is formed attached between the anode plate 20 and the cathode plate 30, thereby shortening the process time for molding the metal separator (M/S), having mass production, providing an effect of a good quality product.
In the foregoing, specific embodiments of the present invention have been described. However, the spirit and scope of the present invention are not limited to these specific embodiments, and it will be understood by those skilled in the art that various modifications and variations can be made within the scope not changing the gist of the present invention.
The embodiments described above are therefore provided to fully convey the scope of the invention to those skilled in the art to which the invention pertains, and it is to be understood that the invention is illustrative and not restrictive in all respects, and that the invention is defined only by the scope of the appended claims.
Claims (1)
1. A method for manufacturing a metal separator for a fuel cell vehicle, in which an anode plate (20), a porous plate (10), and a cathode plate (30) are sequentially laminated and combined, comprising:
1) a step of obtaining the porous plate (10) by cutting both sides of the material (40) with a cutting unit (130) after forming a mesh-like perforated portion (11) on the outer surface of the material (40) unwound from a roll;
2) a step of placing the porous plate (10) on the upper surface of the anode plate (20) and performing spot welding; and
3) a step of placing the cathode plate (30) on the upper portions of the anode plate (20) and the spot-welded perforated plate (10) to be thermally bonded to each other to obtain a metal separator (M/S),
in the porous plate (10), the material (40) is introduced between a punching roller (110) and a support roller (120) to bring the material (40) into contact, the punching roller (110) rotates and an outer surface thereof is formed with a plurality of protrusions (111) having the same pitch in a longitudinal direction, the support roller (120) rotates laterally opposite to the punching roller (110) to form the punched parts (11) by pressing of the protrusions (111),
a space surface (113) having a predetermined length width (D1) is formed on the circumferential surface of the perforation roller (110), so that flat portions (41) having a predetermined length width (D2) can be formed on both sides of the perforation portion (11) by pressing the protrusion portion (111),
the cutting section (130) cuts the material (40) so that the length width (D2) of the flat section (41) can be equally divided at the same pitch, and welding surfaces (13) for spot welding can be formed on both sides of the perforated plate (10) with the perforated section (11) as a reference,
the length width (D3) of the perforated section (11) corresponds to the length width (D3) of the perforated section (11) to be formed in the perforated plate (10), and the length width of the perforated section (11) can be adjusted by using the perforated roller (110) having the outer diameters (h1) and (h2) different from each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210015834A KR102248990B1 (en) | 2021-02-04 | 2021-02-04 | Manufacturing method for metal seperator of fuel cell |
| KR10-2021-0015834 | 2021-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114864979A true CN114864979A (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111054403.0A Pending CN114864979A (en) | 2021-02-04 | 2021-09-09 | Method for preparing metal separator for fuel cell vehicle |
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| KR (1) | KR102248990B1 (en) |
| CN (1) | CN114864979A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102572896B1 (en) | 2023-02-24 | 2023-08-30 | 주식회사 유한정밀 | A press device capable of compensating for tolerances of core molds for forming metal separators in fuel cells for hydrogen vehicles |
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2021
- 2021-02-04 KR KR1020210015834A patent/KR102248990B1/en active IP Right Grant
- 2021-09-09 CN CN202111054403.0A patent/CN114864979A/en active Pending
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| KR102248990B1 (en) | 2021-05-07 |
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