KR101634042B1 - Alignment jig for welding metal separator of fuel cell - Google Patents

Alignment jig for welding metal separator of fuel cell Download PDF

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Publication number
KR101634042B1
KR101634042B1 KR1020150069955A KR20150069955A KR101634042B1 KR 101634042 B1 KR101634042 B1 KR 101634042B1 KR 1020150069955 A KR1020150069955 A KR 1020150069955A KR 20150069955 A KR20150069955 A KR 20150069955A KR 101634042 B1 KR101634042 B1 KR 101634042B1
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South Korea
Prior art keywords
plate
porous
jig
seating
porous article
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KR1020150069955A
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Korean (ko)
Inventor
김근호
주진대
최연준
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현대제철 주식회사
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Priority to KR1020150069955A priority Critical patent/KR101634042B1/en
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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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • 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
    • H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
    • 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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  • 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

Disclosed is an alignment jig for fuel cell metal separator bonding capable of improving micro-spot welding alignment between a porous article and a metal separator.
The alignment jig for bonding a fuel cell metal separator according to the present invention comprises: a porous member seating plate having a porous member seating groove for seating a porous member; A jig bottom plate disposed below the porous article seating plate and supporting the porous article seating plate; A jig upper plate mounted on an upper portion spaced apart from the lower jig and vertically reciprocating with respect to the lower jig; A separator plate aligning member mounted on an edge of a long side of the porous article seating plate for aligning at least one or more metal separators stacked on the porous article for welding with the porous article; And an elastic member mounted on the edge between the porous member seating plate and the jig bottom plate and closely contacting the porous member to the metal separator plate when the jig bottom plate and the jig upper plate are in close contact with each other.

Description

TECHNICAL FIELD [0001] The present invention relates to an alignment jig for fuel cell metal separator plates,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alignment jig for fuel cell metal separator bonding, and more particularly, to an alignment jig for fuel cell metal separator bonding capable of improving micro spot welding alignment between a porous body and a metal separator plate.

The basic structure of a fuel cell is an electrolyte-electrode composite composed of an electrode, a catalyst layer, and a gas diffusion layer, and a metal separator alternately laminated repeatedly.

Among these fuel cells, Polymer Electrolyte Membrane Fuel Cell (PEMFC) is a power generation device that produces electricity directly by electrochemical reaction between hydrogen and oxygen.

That is, a polymer solid electrolyte fuel cell includes a membrane electrode assembly (MEA) having a catalyst electrode layer on both sides of the membrane, the electrolyte membrane on which hydrogen ions migrate, an electrochemical reaction occurs, A gas diffusion layer (GDL) serving to transfer energy, a gasket and a fastening mechanism for maintaining the airtightness of the reaction gases and the cooling water, an appropriate tightening pressure, and a metal separator plate for moving the reaction gases and the cooling water .

Among them, the gas diffusion layer is bonded to the outer surface of the catalyst layer coated for the oxidizing electrode and the reducing electrode on the surface of the polymer electrolyte membrane of the fuel cell, and the supply of hydrogen and air (oxygen) And discharging the generated water to minimize the flooding phenomenon in the fuel cell.

In recent years, studies have been actively conducted to apply a thin metal plate porous body having a mesh structure instead of carbon fiber as a gas diffusion layer for a fuel cell.

At this time, since the porous body has a regular structure, uniform performance can be exhibited when used in a cell, and there is an advantage that deviation between cells is also reduced. In addition, it is possible to contribute to the improvement of the cell performance because of excellent diffusion of the reactive gas and easy discharge of water.

When such a porous body is used as the gas diffusion layer, the fuel cell is completed by stacking together the cell component parts such as the membrane electrode assembly, the metal separator, and the gasket, as in the usual case.

At this time, the porous body was cut according to the size of the channel region in the metal separator, and then bonded to the metal separator by a micro spot welding method.

However, when the porous article is used, since the edge portion of the outer edge exists in a very sharp state after the cutting due to the characteristics of the material, there is a problem in terms of handling and workability due to a sharp outer shape at the time of cell stacking.

In addition, since it is provided as an independent part that is not integrated with peripheral parts, it is difficult to precisely arrange it in the channel region of the metal separator during the cell stacking, which makes it difficult to precisely stack the cells.

A related prior art document is Korean Patent Laid-Open Publication No. 10-2009-0098117 (published on September 17, 2009), which discloses a jig device of a bonding facility for a fuel cell stack separation plate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an alignment jig for fuel cell metal separator bonding capable of improving the micro spot welding alignment between the porous article and the metal separator plate.

To achieve the above object, according to a first aspect of the present invention, there is provided an alignment jig for bonding a fuel cell metal separator, comprising: a porous member seating plate having a porous member seating groove for seating a porous member; A jig bottom plate disposed below the porous article seating plate and supporting the porous article seating plate; A jig upper plate mounted on an upper portion spaced apart from the lower jig and vertically reciprocating with respect to the lower jig; A separator plate aligning member mounted on an edge of a long side of the porous article seating plate for aligning at least one or more metal separators stacked on the porous article for welding with the porous article; And an elastic member mounted on the edge between the porous member seating plate and the jig bottom plate and closely contacting the porous member to the metal separator plate when the jig bottom plate and the jig upper plate are in close contact with each other.

To achieve the above object, according to a second aspect of the present invention, there is provided an alignment jig for bonding a fuel cell metal separator plate, comprising: a porous member seating plate having a plate structure and having a porous member seating region; A jig bottom plate disposed below the porous article seating plate and supporting the porous article seating plate; A jig upper plate mounted on an upper portion spaced apart from the lower jig and vertically reciprocating with respect to the lower jig; A porous body aligning member mounted on an edge of the porous body seating region for aligning the porous body to be seated in the porous body seating region; A separator plate aligning member mounted on an edge of the porous article seating plate for aligning at least one or more metal separators stacked on the porous body for welding with the porous body; And an elastic member mounted inside the porous member seating plate and coupled to the porous member for aligning the porous member with the metal separating plate when the jig bottom plate and the jig upper plate are closely contacted with each other.

The alignment jig for bonding a fuel cell metal separator according to the present invention is characterized in that a porous body is inserted into a porous body seating groove and then at least one metal separator is stacked on the porous body in a predetermined position using a separator plate aligning unit, By aligning the porous body with the metal separating plate by the member, alignment degree for micro spot welding can be improved.

In addition, since the porous body is stably inserted into the porous body mounting groove having the same area as the porous body, the alignment jig for bonding the fuel cell metal separator plate according to the present invention not only improves handling and workability in cell stacking, It is possible to align the metal separator plate in position by the aligning unit, so that it becomes possible to stack the porous body in the cell stacking order so as to be precisely arranged in the channel region of the metal separator plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an alignment jig for fuel cell metal separator bonding according to a first embodiment of the present invention; FIG.
2 is a cross-sectional view illustrating an alignment jig for fuel cell metal sheet splicing according to the first embodiment of the present invention.
3 is a plan view showing the porous body of FIG. 2;
FIG. 4 is a plan view of the metal separator of FIG. 2. FIG.
5 is a cross-sectional view illustrating an alignment jig for fuel cell metal sheet splicing according to a second embodiment of the present invention.
FIG. 6 is a plan view showing the porous article placing plate and the porous article aligning member of FIG. 5;

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an alignment jig for bonding a fuel cell metal separator according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an aligning jig for joining a fuel cell metal separator according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing an aligning jig for joining a fuel cell metal separator according to a first embodiment of the present invention, to be.

1 and 2, the aligning jig 100 for joining a fuel cell metal separator according to the first embodiment of the present invention includes a porous body seating plate 110, a jig bottom plate 120, a jig top plate 130, And includes a separator aligning member 140 and an elastic member 150.

The porous body seating plate 110 has a porous body seating groove H for seating the porous body 10 thereon. The porous member seating plate 110 may have a plate shape and a porous member seating groove H for seating the porous member 10 is provided at the center.

Fig. 3 is a plan view of the porous body of Fig. 2, which will be described in conjunction with Figs. 1 and 2. Fig.

1, 2, and 3, the porous member seating groove H has a groove shape in which a part of the center portion of the porous member seating plate 110 is removed. The porous article seating groove H may have substantially the same area as the porous article 10 and its thickness may be the same as that of the porous article 10 or may be designed to be lower than the thickness of the porous article 10. Accordingly, the porous article 10 can be stably mounted in the porous article seating groove H of the porous article seating plate 110.

In particular, it is preferable that the porous article 10 has the same or corresponding area as the channel region (CA in Fig. 4) of the metal separator 20. The porous member seating plate 110 may be made of a metal material and stainless steel (SUS) is preferably used.

The lower jig plate 120 is disposed below the porous member seating plate 110 to support the porous member seating plate 110. It is preferable that the lower jig plate 120 is designed to have a larger area than the porous plate 110 and the metal separating plate 20 and may be made of the same metal material as the porous seating plate 110.

The jig upper plate 130 is mounted on an upper portion spaced apart from the lower jig plate 120 and reciprocates vertically with respect to the lower jig plate 120. Like the lower jig plate 120, the jig upper plate 130 is desirably designed to have an area larger than that of the porous substrate seating plate 110 and the metal separating plate 20. The porous seating plate 110, And may be made of the same metal material.

The separator plate aligning member 140 is mounted on the long side edge of the porous article seating plate 110. This separator plate aligning member 140 serves to align at least one or more metal separator plates 20 stacked on the porous article 10 for welding with the porous article 10.

Fig. 4 is a plan view of the metal separator of Fig. 2, which will be described in connection with Figs. 1 and 2. Fig.

1, 2, and 4, the metal separator plate 20 is physically contacted with the separator plate aligning member 140 to form a plurality of alignment positions for assisting alignment of the metal separator plate 20. [ And has a hole (T). The plurality of alignment holes T are disposed at positions corresponding to the separator aligning member 140, and a part of the metal separator plate 20 is removed.

Accordingly, when the jig lower plate 120 and the jig upper plate 130 are closely contacted, the separation plate aligning member 140 is inserted into the plurality of alignment holes T assisting the alignment of the metal separating plate 20, So that the positioning of the plate 20 can be easily performed in the correct position.

Therefore, the alignment jig 100 for joining the fuel cell metal separator according to the first embodiment of the present invention is configured such that when the jig bottom plate 120 and the jig top plate 130 are aligned with the porous article 10 and the metal separator plate 20 And after the alignment of the porous article 10 and the metal separator plate 20 is completed, the jig upper plate 120 is lowered in the direction of the lower jig 130 to be closely contacted with each other .

After the jig lower plate 120 and the jig upper plate 130 are brought into close contact with each other, the porous article 10 and the metal separating plate 20, which are pressed down at a constant pressure by the close contact between the jig lower plate 120 and the jig upper plate 130, The micro spot welding is performed.

More specifically, after the porous article 10 is inserted into the porous article seating groove H of the porous article seating plate 110, the cathode metal separator plate 20 is laminated on the porous article 10, And then the anode metal separator plate 20 is laminated on the cathode metal separator plate 20, followed by secondary micro spot welding.

The elastic members 150 are mounted on the four side edges between the porous article seating plate 110 and the jigger plate 120, respectively. The elastic member 150 serves to bring the porous article 10 into close contact with the metal separator plate 20 when the lower jig plate 120 and the jig upper plate 130 are in close contact with each other.

The porous member 10 and the metal separating plate 20 flow by the pressure of the jig upper plate 130 by the elastic member 150 when the jig bottom plate 120 and the jig upper plate 130 are closely contacted with each other, Can be fixed to the metal separator plate 20 at a constant pressure.

At this time, the elastic member 150 may include any one of a coil spring, a leaf spring, a torsion spring, and a compression spring.

The alignment jig for bonding the fuel cell metal separator according to the first embodiment of the present invention has a structure in which a porous body is inserted into a porous body mounting groove and then at least one metal plate is fixed It is possible to improve the alignment degree for micro spot welding by bringing the porous member into close contact with the metal separating plate by the elastic member.

In addition, since the porous body is stably inserted into the porous body mounting groove having the same area as the porous body, the alignment jig for bonding the fuel cell metal separator according to the first embodiment of the present invention can improve handling and workability in cell stacking In addition, since it is possible to align the metal separator plate in position by the separator plate aligning unit, it becomes possible to stack the porous body in the cell stacking order so as to be precisely aligned in the channel region of the metal separator plate.

FIG. 5 is a cross-sectional view illustrating an aligning jig for joining a fuel cell metal separator according to a second embodiment of the present invention, and FIG. 6 is a plan view of the porous member seating plate and the porous member aligning member of FIG.

5 and 6, the alignment jig 200 for joining the fuel cell metal separator according to the second embodiment of the present invention includes a porous body seating plate 210, a jig plate 220, a jig top plate 230, A porous plate aligning member 240, a separating plate aligning member 250, and an elastic member 260.

The porous body seating plate 210 has a plate structure and has a porous body seating area S. At this time, the porous article seating area S may be disposed at the center of the porous article seating plate 210, and has substantially the same area as the porous article 10.

In particular, it is preferable that the porous article 10 has the same or corresponding area as the channel region (not shown) of the metal separator 20. The porous member seating plate 210 may be made of a metal material, and it is preferable to use a stainless steel material among metal materials.

The lower jig plate 220 is disposed below the porous member seating plate 210 to support the porous member seating plate 210. It is preferable that the lower jig plate 220 is designed to have a larger area than the porous plate 210 and the metal separating plate 20. The lower jig plate 220 may be made of the same metal material as the porous plate 210.

The jig upper plate 230 is mounted on the upper portion spaced apart from the lower jig plate 220 and reciprocates vertically with respect to the jig lower plate 220. Like the lower jig plate 220, the jig upper plate 230 is desirably designed to have a larger area than the porous plate 210 and the metal separating plate 20. The porous plate seating plate 210, And may be made of the same metal material.

The porous body aligning member 240 is mounted on the edge of the porous body seating area S and serves to align the porous body 10 that is seated in the porous body seating area S. The porous body alignment member 240 is mounted for the purpose of aligning the porous body 10 in a stable manner in the porous body seating region S. The porous body aligning member 240 is disposed in the porous body seating region S for stable alignment of the porous body 10, It is preferable that they are respectively mounted on four edges.

Although not shown in the drawing, the porous body aligning member 250 may be designed to be integrally connected along the edge of the porous body seating area S.

The separator plate aligning member 250 is mounted on the four side edges of the porous member seating plate 210 and aligns at least one or more metal separator plates 20 stacked on the porous member 10 for welding with the porous member 10 .

At this time, the metal separator plate 20 is physically in contact with the separator plate aligning member 250, and a plurality of alignment holes (not shown) for assisting alignment of the metal separator plate 20 ). The plurality of alignment holes are formed by removing a part of the metal separator plate 20 disposed at a position corresponding to the separator plate aligning member 250.

Accordingly, when the jig lower plate 220 and the jig upper plate 230 are in close contact with each other, the separator plate aligning member 250 is inserted into the plurality of alignment holes assisting the alignment of the metal separator plate 20, So that the positional alignment of the light emitting diode can be easily performed in the correct position.

The elastic member 260 is mounted inside the porous member seating plate 210 and is coupled to the porous member aligning member 240. The elastic member 260 serves to bring the porous article 10 into close contact with the metal separator plate 20 when the lower jig plate 220 and the jig upper plate 230 are in close contact with each other. The elastic member 260 is mounted on the lower portion of the porous body aligning member 240 and moves up and down in cooperation with the porous body aligning member 240 when the jig lower plate 220 and the jig upper plate 230 are closely contacted.

Accordingly, when the jig lower plate 220 and the jig upper plate 230 are closely contacted, the porous member 10 and the metal separating plate 20 flow due to the pressure of the jig upper plate 230 by the elastic member 260, Can be fixed to the metal separator plate 20 at a constant pressure.

At this time, the elastic member 260 may include any one of a coil spring, a leaf spring, a torsion spring, and a compression spring.

The alignment jig for bonding the fuel cell metal separator according to the second embodiment of the present invention may be configured such that the porous body is stably placed in the porous body seating region by the porous body aligning member, By aligning the porous body with the metal separating plate by the elastic member in the state where the metal separating plates are laminated in place, alignment degree for micro spot welding can be improved.

In addition, the alignment jig for bonding the fuel cell metal sheet according to the second embodiment of the present invention stably seats the porous body in the porous body seating region having the same area as the porous body, so that handling and workability in cell stacking can be improved In addition, since it is possible to align the metal separator plate in position by the separator plate aligning unit, it becomes possible to stack the porous body in the cell stacking order so as to be precisely aligned in the channel region of the metal separator plate.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. These changes and modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.

100: alignment jig 110: porous article seating plate
120: jig bottom plate 130: jig top plate
140: separator plate alignment member 150: elastic member
H: porous article placing groove 10: porous article
20: metal separator plate
200: alignment jig 210: porous article seating plate
220: jig bottom plate 230: jig top plate
240: porous article aligning member 250: separating plate aligning member
260: elastic member 10: porous article
20: metal separator plate

Claims (9)

A porous article seating plate having a porous article receiving groove for receiving a porous article;
A jig bottom plate disposed below the porous article seating plate and supporting the porous article seating plate;
A jig upper plate mounted on an upper portion spaced apart from the lower jig and vertically reciprocating with respect to the lower jig;
A separator plate aligning member mounted on an edge of a long side of the porous article seating plate for aligning at least one or more metal separators stacked on the porous article for welding with the porous article; And
An elastic member mounted on an edge between the porous member seating plate and the jig bottom plate to closely contact the porous member with the metal separator plate when the jig bottom plate and the jig upper plate are in close contact with each other;
Wherein the fuel cell separator plate includes a plurality of fuel cells.
The method according to claim 1,
The porous article-
Wherein the porous sheet has a groove shape in which a part of the center portion of the porous sheet is removed, and has the same area as the porous sheet.
The method according to claim 1,
The porous article
And has an area equal to or corresponding to a channel area of the metal separator.
The method according to claim 1,
The metal separator plate
And a plurality of alignment holes for physically contacting the separation plate alignment member and for assisting alignment of the metal separation plate.
5. The method of claim 4,
The plurality of alignment holes
Wherein the metal plate is disposed at a position corresponding to the separator plate aligning member, and a part of the metal separator plate is removed.
The method according to claim 1,
The elastic member
Wherein the fuel cell separator plate includes any one of a coil spring, a leaf spring, a torsion spring, and a compression spring.
A porous article seating plate having a plate structure and having a porous article seating region;
A jig bottom plate disposed below the porous article seating plate and supporting the porous article seating plate;
A jig upper plate mounted on an upper portion spaced apart from the lower jig and vertically reciprocating with respect to the lower jig;
A porous body aligning member mounted on an edge of the porous body seating region for aligning the porous body to be seated in the porous body seating region;
A separator plate aligning member mounted on an edge of the porous article seating plate for aligning at least one or more metal separators stacked on the porous body for welding with the porous body; And
An elastic member mounted inside the porous member seating plate and coupled to the porous member aligning member and adapted to bring the porous member into close contact with the metal separating plate when the jig bottom plate and the jig upper plate are in close contact with each other;
Wherein the fuel cell separator plate includes a plurality of fuel cells.
8. The method of claim 7,
The porous article seating area
Wherein the porous body has an area equal to or corresponding to the porous body.
8. The method of claim 7,
The elastic member
Wherein the porous jig is mounted on a lower portion of the porous body aligning member and moves up and down in cooperation with the porous body aligning member when the jig bottom plate and the jig upper plate are closely contacted.
KR1020150069955A 2015-05-19 2015-05-19 Alignment jig for welding metal separator of fuel cell KR101634042B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200063094A (en) * 2018-11-27 2020-06-04 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR20200062643A (en) * 2018-11-27 2020-06-04 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR20220024289A (en) * 2019-12-27 2022-03-03 주식회사 노바 Welding apparatus of separator for fuel cell stack

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033569A (en) * 2007-10-01 2009-04-06 현대자동차주식회사 Heat pressure-type jig for manufacturing 5-layer membrane
JP2010146942A (en) * 2008-12-22 2010-07-01 Toyota Motor Corp Fuel cell, manufacturing device for fuel cell, and manufacturing method for fuel cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033569A (en) * 2007-10-01 2009-04-06 현대자동차주식회사 Heat pressure-type jig for manufacturing 5-layer membrane
JP2010146942A (en) * 2008-12-22 2010-07-01 Toyota Motor Corp Fuel cell, manufacturing device for fuel cell, and manufacturing method for fuel cell

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200063094A (en) * 2018-11-27 2020-06-04 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR20200062643A (en) * 2018-11-27 2020-06-04 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR102121199B1 (en) * 2018-11-27 2020-06-10 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR102399273B1 (en) * 2018-11-27 2022-05-19 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR20220024289A (en) * 2019-12-27 2022-03-03 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR20220024288A (en) * 2019-12-27 2022-03-03 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR102628854B1 (en) * 2019-12-27 2024-01-25 주식회사 노바 Welding apparatus of separator for fuel cell stack
KR102644988B1 (en) * 2019-12-27 2024-03-07 주식회사 노바 Welding apparatus of separator for fuel cell stack

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