KR102409185B1 - Bonding method of seperating plate and cell frame for sofc stack - Google Patents

Bonding method of seperating plate and cell frame for sofc stack Download PDF

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KR102409185B1
KR102409185B1 KR1020200104978A KR20200104978A KR102409185B1 KR 102409185 B1 KR102409185 B1 KR 102409185B1 KR 1020200104978 A KR1020200104978 A KR 1020200104978A KR 20200104978 A KR20200104978 A KR 20200104978A KR 102409185 B1 KR102409185 B1 KR 102409185B1
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cell frame
welding
separator
stack
sofc
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KR20220023353A (en
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권철
윤주영
최용호
박동재
정진범
최선아
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주식회사 보림파워텍
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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
    • H01M8/0286—Processes for forming seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • 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
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293—Fuel cells with solid oxide electrolytes
    • 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
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/2425—High-temperature cells with solid electrolytes
    • H01M8/2432—Grouping of unit cells of planar configuration
    • 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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Abstract

본 발명은 SOFC 스택용 분리판과 셀프레임 접합방법에 관한 것으로, 더욱상세하게는 SOFC에 사용되는 스택의 분리판과 셀프레임을을 접할 할 때 발생할 수 있는 변형과 용가제로 인한 화학변화를 최소화하여 스택의 성능을 최대한으로 올릴 수 있도록 레이저용접을 사용하는 SOFC 스택용 분리판과 셀프레임 접합방법에 관한 것이다.
본 발명의 바람직한 실시예로 형성된 SOFC 스택용 분리판과 셀프레임 접합방법에 의하면 용접온도가 주변으로 번지기 전에 용접이 완료되기 때문에 모재가 거의 변형되지 않아서 스택의 성능이 그대로 유지되고, 용가제를 사용하지 않고, 모재 자체가 서로 융착되는 것이어서 새로운 성분이 포함되지 않기 때문에 전기생산량이 그대로 유지되며, 용접으로 인한 변형도 적고, 모재에 별도의 성분이 포함되지 않으므로 시뮬레이션 예측이 정확하게 이루어질 수 있는 등의 효과가 발생한다.The present invention relates to a method of bonding a separator plate for an SOFC stack and a cell frame, and more particularly, by minimizing deformation and chemical changes due to fillers that may occur when contacting a separator plate and a cell frame of a stack used for SOFC. It relates to a method of joining a separator plate for an SOFC stack using laser welding and a cell frame to maximize the performance of the stack.
According to the method of joining the separator plate for SOFC stack and the cell frame formed in a preferred embodiment of the present invention, since welding is completed before the welding temperature spreads to the surroundings, the base material is hardly deformed, so the performance of the stack is maintained as it is, and a filler is used Since the base material itself is fused to each other, the amount of electricity production is maintained as it does not contain new components, the deformation due to welding is small, and the simulation prediction can be made accurately because the base material does not contain separate components. occurs

Description

SOFC 스택용 분리판과 셀프레임 접합방법{BONDING METHOD OF SEPERATING PLATE AND CELL FRAME FOR SOFC STACK}Separator plate for SOFC stack and cell frame bonding method

본 발명은 SOFC 스택용 분리판과 셀프레임 접합방법에 관한 것으로, 더욱상세하게는 SOFC에 사용되는 스택의 분리판과 셀프레임을을 접할 할 때 발생할 수 있는 변형과 용가제로 인한 화학변화를 최소화하여 스택의 성능을 최대한으로 올릴 수 있도록 레이저용접을 사용하는 SOFC 스택용 분리판과 셀프레임 접합방법에 관한 것이다.The present invention relates to a method of bonding a separator plate for an SOFC stack and a cell frame, and more particularly, by minimizing deformation and chemical changes due to fillers that may occur when contacting a separator plate and a cell frame of a stack used for SOFC. It relates to a method of joining a separator plate for an SOFC stack using laser welding and a cell frame to maximize the performance of the stack.

고체산화물 연료전지(Solid Oxide Fuel Cell; 이하, 'SOFC'라 함)는 산소 이온전도성 전해질과 그 양면에 위치한 공기극(Cathode)와 연료극(Anode)으로 이루어져 있는 단위전지의 각 전극에 공기와 연료를 공급하면, 공기극에서는 산소의 환원반응이 일어나 산소이온이 생성되고, 전해질을 통해 연료극으로 이동한 산소이온은 다시 연료극에 공급된 수소와 반응하여 물을 생성하게 된다. Solid Oxide Fuel Cell (hereinafter referred to as 'SOFC') is a unit cell composed of an oxygen ion conductive electrolyte and a cathode and anode located on both sides of the unit cell by supplying air and fuel to each electrode. When supplied, oxygen reduction reaction occurs at the cathode to generate oxygen ions, and the oxygen ions that have moved to the anode through the electrolyte react with hydrogen supplied to the anode to produce water.

이때, 연료극에서는 전자가 생성되고 공기극에서는 전자가 소모되므로 두 전극을 서로 연결하면 전기가 흐르게 된다.At this time, since electrons are generated at the fuel electrode and electrons are consumed at the air electrode, electricity flows when the two electrodes are connected to each other.

상기 SOFC는 연료로부터 연료전지가 요구하는 수소를 많이 포함하는 가스로 변환하는 개질기(Fuel Reformer)가 필요하고, 개질기로부터 들어오는 수소와 공기중의 산소로 직류전기와 물 및 부산물인 열을 발생시키는 본체인 스택(stack)이 필요하며, 연료전지에서 나오는 직류전원을 교류전원으로 변환하는 인버터(inverter)가 필요하고, 나머지 기타 장치들이 필요하다.The SOFC requires a fuel reformer that converts fuel into a gas containing a lot of hydrogen required by the fuel cell, and a body that generates direct current electricity, water, and heat as a by-product from the hydrogen coming from the reformer and oxygen in the air An in-stack is required, an inverter that converts DC power from the fuel cell into AC power, and other devices are required.

상기 연료전지 스택(Stack)은 연료전지 시스템의 여러 구성요소들 중에서 수소와 산소가 전기화학적으로 반응하여 전기 에너지를 발생시키는 발전 구성요소이다.The fuel cell stack is a power generation component in which hydrogen and oxygen are electrochemically reacted among various components of a fuel cell system to generate electric energy.

이러한 연료전지 스택은 전기 에너지를 발생시키는 최소의 단위로서 단위 전지를 구비하며, 이런 수 개 또는 수십 개의 단위 전지들이 직렬로 적층되는 구성을 갖는다.Such a fuel cell stack includes a unit cell as a minimum unit for generating electric energy, and has a configuration in which several or tens of such unit cells are stacked in series.

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종래의 연료전지 스택에 관한 기술은 대한민국 등록특허공보 제10-0891358호 및 공개특허공보 제2018-0108249호 등에 개시된 바 있다.The prior art related to the fuel cell stack has been disclosed in Korean Patent Publication No. 10-0891358 and Korean Patent Publication No. 2018-0108249.

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종래의 연료전지 스택에서 애노드분리판과 캐소드분리판(이하, '분리판(10)'이라 통칭한다)은 도 3과 같이 각각 셀프레임(20)과 용접라인(15)을 따라서 용접하여 서로 적층하여 형성한다.In a conventional fuel cell stack, an anode separator and a cathode separator (hereinafter, collectively referred to as a 'separator plate 10') are laminated together by welding along the cell frame 20 and the welding line 15, respectively, as shown in FIG. 3 . to form

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(특허문헌 1) KR101180844 B1 (Patent Document 1) KR101180844 B1

(특허문헌 2) KR1020110089594 A (Patent Document 2) KR1020110089594 A

(특허문헌 3) KR100891358 B1(Patent Document 3) KR100891358 B1

(특허문헌 4) KR1020180108249 A(Patent Document 4) KR1020180108249 A

그러나, 종래의 SOFC용 스택의 분리판과 셀프레임을 용접하여 접합할 때 다음과 같은 문제점이 발생한다. However, when the conventional SOFC stack separator plate and the cell frame are welded and joined, the following problems occur.

(1) 분리판과 셀프레임을 용접할 때 브레이징 용접방법을 사용하는데, 브레이징 용접방법은 모재를 녹여서 확산접합하는 것으로, 용접온도가 1080℃~1135℃에 이르기 때문에 접합부위에서 모재가 휘게 되어 스택의 성능이 매우 저하된다. (1) When welding the separator plate and the cell frame, the brazing welding method is used. The brazing welding method is diffusion bonding by melting the base material, and since the welding temperature reaches 1080°C~1135°C, the base material is bent at the junction and the stack is formed. performance is very poor.

(2) 용가제를 사용하기 때문에 용가제 성분이 분리판과 셀프레임에 함께 부착되기 때문에 다른 원소로 인하여 전기생산량이 낮아진다. (2) Because the filler is used, the amount of electricity produced is lowered due to other elements because the filler component is attached to the separator and the cell frame.

(3) 변형이 심하거나 용가제로 인하여 모재에 다른 원소가 들어가게 되면 전도도가 달라지기 때문에 시뮬레이션 예측이 어렵다.(3) Simulation prediction is difficult because conductivity changes when other elements are added to the base material due to severe deformation or fillers.

상기한 문제점을 해결하기 위해서, 본 발명은 분리판과 셀프레임을 레이저용접으로 접합하되, In order to solve the above problems, the present invention is to join the separator and the cell frame by laser welding,

분리판 또는 셀프레임에 일정깊이의 홈으로 형성되는 용접라인을 형성하거나, 분리판과 셀프레임에 동시에 일정깊이의 홈으로 형성되는 용접라인을 형성하고, Forming a welding line formed as a groove of a certain depth in the separator plate or cell frame, or forming a welding line formed by a groove of a certain depth in the separator plate and the cell frame at the same time,

상기 용접라인에 레이저용접한다.Laser welding is performed on the welding line.

본 발명의 바람직한 실시예로 형성된 SOFC 스택용 분리판과 셀프레임 접합방법에 의하면 다음과 같은 효과가 발생한다.According to the method of bonding the separator plate for SOFC stack and the cell frame formed according to a preferred embodiment of the present invention, the following effects occur.

(1) 용접온도가 주변으로 번지기 전에 용접이 완료되기 때문에 모재가 거의 변형되지 않아서 스택의 성능이 그대로 유지된다.(1) Because the welding is completed before the welding temperature spreads to the surroundings, the base material is hardly deformed and the stack performance is maintained.

(2) 용가제를 사용하지 않고, 모재 자체가 서로 융착되는 것이어서 새로운 성분이 포함되지 않기 때문에 전기생산량이 그대로 유지된다. (2) Electricity production is maintained as it does not use fillers, and because the base material itself is fused to each other, no new components are included.

(3) 용접으로 인한 변형도 적고, 모재에 별도의 성분이 포함되지 않으므로 시뮬레이션 예측이 정확하게 이루어질 수 있다.(3) Deformation due to welding is small, and since the base material does not contain a separate component, simulation prediction can be made accurately.

도 1은 종래의 스택의 분리판의 개념도.
도 2는 본 발명의 바람직한 실시예로 형성된 분리판과 셀프레임을 나타낸 평면개념도.
도 3은 본 발명의 바람직한 실시예로 형성된 분리판과 셀프레임을 용접할 때 용접라인을 형성하기 위한 용접홈의 형상을 나타낸 개념도.1 is a conceptual view of a separator plate of a conventional stack.
2 is a plan conceptual view showing a separator and a cell frame formed according to a preferred embodiment of the present invention.
3 is a conceptual view showing the shape of a welding groove for forming a welding line when welding a cell frame and a separator formed in a preferred embodiment of the present invention.

도 1 내지 도 2의 번호는 각각 특허문헌 3과 4에 포함된 번호이므로, 본 발명을 설명할 때에는 설명하지 않기로 한다.Since the numbers in FIGS. 1 to 2 are included in Patent Documents 3 and 4, respectively, it will not be described when describing the present invention.

본 발명은 분리판(10)과 셀프레임(20)을 레이저용접으로 접합하되, In the present invention, the separator 10 and the cell frame 20 are joined by laser welding,

분리판(10) 또는 셀프레임(20)에 일정깊이의 홈으로 형성되는 용접라인(15)을 형성하거나, 분리판(10)과 셀프레임(20)에 동시에 일정깊이의 홈으로 형성되는 용접라인(15)을 형성하고, A welding line 15 formed as a groove of a predetermined depth in the separator 10 or the cell frame 20 is formed, or a welding line formed as a groove of a predetermined depth in the separation plate 10 and the cell frame 20 at the same time to form (15),

상기 용접라인(15)에 레이저용접한다.Laser welding is performed on the welding line 15 .

상기 분리판(10)은 애노드, 캐소드 분리판을 통칭하는 것으로, 각각의 유로와 통로는 달리형성되나, 각각 셀프레임(20)과 용접하는 것은 동일하다.The separator 10 is a generic term for an anode and a cathode separator, and each flow path and passage are formed differently, but welding with the cell frame 20 is the same.

상기 분리판(10)과 셀프레임은 각각 3 ~ 5mm의 두께로 형성되고, 용접라인(15)이 형성되는 홈의 깊이는 1 ~ 2mm로 형성된다.The separator 10 and the cell frame are each formed to a thickness of 3 to 5 mm, and the depth of the groove in which the welding line 15 is formed is formed to be 1 to 2 mm.

실시예 1)Example 1)

분리판(10)과 셀프레임(20)에 용접라인(15)을 표시하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5 kw의 세기로 레이저용접한다(도 4의 (a)).The welding line 15 is marked on the separator 10 and the cell frame 20, and the separator 10 and the cell frame 20 are laser-welded with an intensity of 2 to 2.5 kw in a state of overlapping (FIG. 4). (a)).

실시예2)Example 2)

분리판(10)에 홈으로 형성되는 용접라인(15)을 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 세기로 레이저용접하여 형성한다(도 4의 (b))A welding line 15 formed as a groove is formed in the separation plate 10, and the separation plate 10 and the cell frame 20 are stacked and laser welded at an intensity of 2 to 2.5 kw (Fig. 4). (b))

..

실시예3)Example 3)

셀프레임(20)에 홈으로 형성되는 용접라인(15)을 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 세기로 레이저용접한다(도 4의 (b)).A welding line 15 formed as a groove is formed in the cell frame 20, and the separation plate 10 and the cell frame 20 are laser-welded with an intensity of 2 to 2.5 kw in a state of overlapping (FIG. 4(b)). )).

실시예4)Example 4)

분리판(10)과 셀프레임(20)에 서로 대응되도록 홈으로 형성되는 용접라인(15)을 각각 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 세기로 용접라인을 따라서 레이저용접한다(도 4의 c).Welding lines 15 formed as grooves are respectively formed to correspond to each other in the separator 10 and the cell frame 20, and the intensity of 2 to 2.5 kw in a state in which the separator 10 and the cell frame 20 are superimposed. Laser welding is performed along the welding line with the furnace (FIG. 4c).

이하, 본 발명의 바람직한 실시예로 형성된 SOFC스택용 분리판과 셀프레임 접합방법의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the separation plate for SOFC stack and the cell frame bonding method formed in a preferred embodiment of the present invention will be described as follows.

4mm의 금속판에 홈을 형성하고, 주연부에 가스 또는 공기의 통과부를 형성하여 분리판(10)을 형성하고, 가운데를 중공시켜서 셀프레임(20)을 각각 가공한다. A groove is formed in a metal plate of 4 mm, a passage of gas or air is formed on the periphery to form the separation plate 10 , and the cell frame 20 is processed by hollowing the center.

이때, 분리판(10) 또는 셀프레임(20)에 용접라인(15)을 표시하거나 홈을 파는데, 표시하는 것은 애노드와 캐소드 분리판과 각 셀프레임간에는 공기와 가스의 유동방향이 달라지기 때문에 용접라인(15)을 잘 형성하여 하기 때문이다. At this time, the welding line 15 is marked or grooved in the separator 10 or the cell frame 20, because the direction of air and gas flow is different between the anode and the cathode separator and each cell frame. This is because the welding line 15 is well formed.

상기 용접라인(15)만을 표시하면 레이저의 세기를 더 강하게 해야하고, 셀프레임(20) 또는 분리판(10) 하나에만 홈으로 형성되는 용접라인(15)을 형성하면, 다소 레이저의 세기를 약하게 해도 무방하다. If only the welding line 15 is displayed, the intensity of the laser should be stronger, and if the welding line 15 formed as a groove in only one of the cell frame 20 or the separator 10 is formed, the intensity of the laser is somewhat weakened. it's free to do

특히, 셀프레임(20)과 분리판(10) 모두에 용접라인(15)을 따라서 각각 홈을 형성하면 접합되는 부위가 매우 얇아지기 때문에 강한 세기의 레이저로 빠르게 용접하여야 한다.In particular, when each groove is formed along the welding line 15 in both the cell frame 20 and the separator 10, the jointed portion becomes very thin, so that it must be rapidly welded with a laser of strong intensity.

상기와 같이, 용가제 없이 레이저로 빠른 시간에 용접을 수행하면 변형이 없을 뿐만 아니라, 모재에 다른 성분이 포함되지 않아서 일정한 전기생산량 및 시뮬레이션 예측이 가능해진다.As described above, when welding is performed in a short time with a laser without a filler, there is no deformation, and since other components are not included in the base material, a certain amount of electricity production and simulation prediction are possible.

본 발명의 바람직한 실시예로 형성된 SOFC 스택용 분리판과 셀프레임 접합방법에 의하면 용접온도가 주변으로 번지기 전에 용접이 완료되기 때문에 모재가 거의 변형되지 않아서 스택의 성능이 그대로 유지되고, 용가제를 사용하지 않고, 모재 자체가 서로 융착되는 것이어서 새로운 성분이 포함되지 않기 때문에 전기생산량이 그대로 유지되며, 용접으로 인한 변형도 적고, 모재에 별도의 성분이 포함되지 않으므로 시뮬레이션 예측이 정확하게 이루어질 수 있는 등의 효과가 발생한다.According to the method of joining the separator plate for SOFC stack and the cell frame formed in a preferred embodiment of the present invention, since welding is completed before the welding temperature spreads to the surroundings, the base material is hardly deformed, so the performance of the stack is maintained as it is, and a filler is used Since the base material itself is fused to each other, the amount of electricity production is maintained as it does not contain new components, the deformation due to welding is small, and the simulation prediction can be made accurately because the base material does not contain separate components. occurs

본 발명은 첨부된 도면을 참조하여 바람직한 실시 예를 중심으로 기술되었지만 당업자라면 이러한 기재로부터 후술하는 특허청구범위에 의해 포괄되는 본 발명의 범주를 벗어남이 없이 다양한 변형이 가능하다는 것은 명백하다.Although the present invention has been mainly described with reference to the accompanying drawings, it is clear that various modifications can be made by those skilled in the art from this description without departing from the scope of the present invention encompassed by the claims to be described later.

10 : 분리판 15 : 용접라인
20 : 셀프레임10: separator 15: welding line
20: cell frame

Claims (5)

삭제delete 삭제delete 분리판(10)에 홈으로 형성되는 용접라인(15)을 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 세기로 용접라인(15)을 따라서 레이저용접하되,
분리판(10)과 셀프레임(20)의 두께가 각각 4mm이고, 분리판(10)의 홈의 깊이는 2mm인 것을 특징으로 하는 SOFC 스택용 분리판과 셀프레임 접합방법.A welding line 15 formed as a groove is formed in the separation plate 10, and laser welding is performed along the welding line 15 with an intensity of 2 to 2.5 kw in a state where the separation plate 10 and the cell frame 20 are superimposed. but,
A method for bonding a separator plate and a cell frame for an SOFC stack, characterized in that the thickness of the separator 10 and the cell frame 20 is 4 mm, respectively, and the depth of the groove of the separator 10 is 2 mm. 셀프레임(20)에 홈으로 형성되는 용접라인(15)을 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 세기로 용접라인(15)을 따라서 레이저용접하되,
분리판(10)과 셀프레임(20)의 두께가 각각 4mm이고, 셀프레임(20)의 홈의 깊이는 2mm인 것을 특징으로 하는 SOFC 스택용 분리판과 셀프레임 접합방법.A welding line 15 formed as a groove is formed in the cell frame 20, and laser welding is performed along the welding line 15 with an intensity of 2 to 2.5 kw in a state where the separator 10 and the cell frame 20 are overlapped. but,
The separation plate for SOFC stack and the cell frame bonding method, characterized in that the thickness of the separator 10 and the cell frame 20 is 4 mm, respectively, and the depth of the groove of the cell frame 20 is 2 mm. 분리판(10)과 셀프레임(20)에 서로 대응되도록 홈으로 형성되는 용접라인(15)을 각각 형성하고, 분리판(10)과 셀프레임(20)을 포갠상태에서 2~2.5kw의 용접라인(15)을 따라서 레이저용접하되,
분리판(10)과 셀프레임(20)의 두께가 각각 4mm이고, 분리판(10)과 셀프레임(20)의 홈의 깊이는 각각 2mm인 것을 특징으로 하는 SOFC 스택용 분리판과 셀프레임 접합방법.Welding lines 15 formed as grooves are respectively formed to correspond to each other in the separator 10 and the cell frame 20, and 2 to 2.5 kw of welding is performed in a state where the separator 10 and the cell frame 20 are stacked. Laser welding along line (15),
Separator plate for SOFC stack and cell frame bonding, characterized in that the thickness of the separator 10 and the cell frame 20 is 4 mm, respectively, and the depth of the grooves of the separator 10 and the cell frame 20 is 2 mm, respectively Way.
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