JP2001297778A - Separator for fuel cell stack and manufacturing method of the same - Google Patents
Separator for fuel cell stack and manufacturing method of the sameInfo
- Publication number
- JP2001297778A JP2001297778A JP2000113636A JP2000113636A JP2001297778A JP 2001297778 A JP2001297778 A JP 2001297778A JP 2000113636 A JP2000113636 A JP 2000113636A JP 2000113636 A JP2000113636 A JP 2000113636A JP 2001297778 A JP2001297778 A JP 2001297778A
- Authority
- JP
- Japan
- Prior art keywords
- expanded graphite
- base plate
- plate
- frame
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は燃料電池のスタック
用セパレータ及びその製造方法に関する。The present invention relates to a fuel cell stack separator and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、この種の実施例は、特開平１０−
２５５８２４号に記載されている。この従来の実施例
は、反応ガスのリークが生じない気密性に優れたスタッ
ク用セパレータを大量生産することを目的とする。普通
一般に、気密性，軽量性，大量生産性（安価）などを達
成することができるセパレータを提供することが、この
種の発明の目的である。2. Description of the Related Art Conventionally, this type of embodiment is disclosed in
No. 255824. The purpose of this conventional example is to mass-produce a stack separator excellent in airtightness that does not cause leakage of a reaction gas. Generally, it is an object of this invention to provide a separator that can achieve airtightness, light weight, mass productivity (low cost), and the like.
【０００３】しかしながら、前記従来の実施例は、気密
性，軽量性，大量生産性に関し、発明の目的を十分に果
たしているということができない。その理由の一つは、
起電部としてのセパレータを形成する場合、セパレータ
基材の上下の側面に対してプレス加工を施して流路をそ
れぞれ形成する方法を採用しているからである。However, the above-mentioned conventional embodiments cannot sufficiently fulfill the object of the invention in terms of airtightness, light weight, and mass productivity. One of the reasons is
This is because, when forming a separator as an electromotive portion, a method is employed in which upper and lower side surfaces of a separator base material are subjected to press working to form respective flow paths.
【０００４】従来の実施例は、気密性を高めるために、
セパレータ基材の周縁部に突壁（リップ）を二重に周設
する必要がある。したがって、セパレータ基材そのもの
がある程度の厚みが必要となり、例えばセパレータ基材
を成形する場合、複数の可撓性黒鉛シートを積層する必
要がある。この考え方は、突壁（リップ）を圧着させて
当該部分の気密性を高めるという点で優れているが、セ
パレータ基材そのものを薄くしようとする考え方に反す
る。また、前記周縁部に周設された二重の突壁内に弾性
パッキンを嵌め込むと言う考え方もあるが、弾性パッキ
ンを周溝に嵌め込む作業が容易ではない。[0004] In the conventional embodiment, in order to improve airtightness,
It is necessary to provide a double protruding wall (lip) around the periphery of the separator base material. Therefore, the separator substrate itself needs to have a certain thickness. For example, when forming the separator substrate, it is necessary to laminate a plurality of flexible graphite sheets. This idea is excellent in that the protruding wall (lip) is pressed to increase the airtightness of the portion, but contradicts the idea of trying to make the separator base material itself thin. Further, there is a concept that an elastic packing is fitted into a double protruding wall provided around the peripheral edge portion, but the work of fitting the elastic packing into the circumferential groove is not easy.
【０００５】[0005]
【発明が解決しようとする課題】発明の第１の目的は、
軽量性に優れかつ弾性パッキンを使用しなくても良い燃
料電池のスタック用セパレータＳを提供することであ
る。第２の目的は、大量生産に適したセパレータＳの製
造方法を提供することである。第３の目的は、パッキン
機能を有する額縁部材そのものの幅を狭く（額縁の軽量
化）することができること。The first object of the present invention is to
An object of the present invention is to provide a fuel cell stack separator S that is excellent in lightness and does not require the use of elastic packing. A second object is to provide a method for manufacturing a separator S suitable for mass production. A third object is to reduce the width of the frame member itself having a packing function (to reduce the weight of the frame).
【０００６】[0006]
【課題を解決するための手段】本発明の燃料電池のスタ
ック用セパレータは、四隅に貫通孔２を有する薄いシー
ト状可撓性膨張黒鉛ベース板１、流路用切欠部４，前記
貫通孔にそれぞれ連通可能な供給孔５及び排出孔６を有
する一対の薄いシート状膨張黒鉛流路板３、幅広の開口
窓部１９を有すると共に縁部８ａがパッキン機能を有す
る薄い額縁状の一対の膨張黒鉛枠板８とから成り、前記
膨張黒鉛ベース板１を基準として該膨張黒鉛ベース板１
の両側面に膨張黒鉛流路板３をサンドイッチ状に接合
し、さらに、これら上下の膨張黒鉛流路板３，３の壁面
に前記膨張黒鉛枠板８，８がサンドイッチ状に接合・圧
着されていることを特徴とする。A stack separator for a fuel cell according to the present invention comprises a thin sheet-shaped flexible expanded graphite base plate 1 having through holes 2 at four corners, a cutout portion 4 for a flow path, and a through hole 4. A pair of thin sheet-like expanded graphite flow path plates 3 each having a supply hole 5 and a discharge hole 6 which can communicate with each other, a pair of thin frame-shaped expanded graphite having a wide opening window 19 and an edge 8a having a packing function. A frame plate 8, the expanded graphite base plate 1 based on the expanded graphite base plate 1.
The expanded graphite flow channel plate 3 is joined to both sides of the expanded graphite flow channel plate 3 in the form of a sandwich, and the expanded graphite frame plates 8, 8 are bonded and crimped to the upper and lower wall surfaces of the expanded graphite flow channel plates 3, 3 in a sandwich shape. It is characterized by being.
【０００７】また本発明の燃料電池のスタック用セパレ
ータの製造方法は、所定寸法に切断され、かつ、四隅に
貫通孔２を有する薄いシート状膨張黒鉛ベース板１を形
成する膨張黒鉛ベース板形成工程Ａと、流路用切欠部
４，供給孔５及び排出孔６を有する膨張黒鉛流路板３を
形成する薄いシート状膨張黒鉛流路板形成工程Ｂと、幅
広の開口窓部１９を有する薄い額縁状の膨張黒鉛枠板８
を形成する膨張黒鉛枠板形成工程Ｃと、前記膨張黒鉛ベ
ース板形成工程Ａで形成された膨張黒鉛ベース板１を1
番真中に位置付け、この膨張黒鉛ベース板１を基準とし
て該膨張黒鉛ベース板１の両側面に前記膨張黒鉛流路板
形成工程Ｂで形成された膨張黒鉛流路板３を互いに背を
合わせるようにサンドイッチ状に接合させ、さらに、こ
れら上下の膨張黒鉛流路板３，３の壁面に前記膨張黒鉛
枠板形成工程Ｃで形成された膨張黒鉛枠板８，８をサン
ドイッチ状に接合させる５枚板接合・圧着工程Ｄとを備
えることを特徴とする。The method of manufacturing a stack separator for a fuel cell according to the present invention comprises a step of forming an expanded graphite base plate 1 which is cut into a predetermined size and has a thin sheet-like expanded graphite base plate 1 having through holes 2 at four corners. A, a thin sheet-like expanded graphite flow path plate forming step B for forming an expanded graphite flow path plate 3 having flow path cutouts 4, supply holes 5 and discharge holes 6, and a thin sheet having a wide opening window 19 Frame-shaped expanded graphite frame plate 8
The expanded graphite base plate 1 formed in the expanded graphite base plate forming step A and the expanded graphite base plate 1 formed in
With the expanded graphite base plate 1 as a reference, the expanded graphite flow passage plates 3 formed in the expanded graphite flow passage plate forming step B are placed on both sides of the expanded graphite base plate 1 so as to be opposed to each other. A five-sheet plate which is joined in a sandwich shape, and further, the expanded graphite frame plates 8, 8 formed in the expanded graphite frame plate forming step C are joined to the upper and lower wall surfaces of the expanded graphite flow path plates 3, 3 in a sandwich shape. And a bonding / compression bonding step D.
【０００８】[0008]
【発明の実施の形態】まず、本発明の製造方法の発明を
説明する前に、方法によって得られる燃料電池のスタッ
ク用セパレータＳの構造について説明する。図１乃至図
３は、スタック用セパレータＳの一例を示す説明用の各
概略図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the manufacturing method of the present invention, the structure of a stack separator S for a fuel cell obtained by the method will be described. FIGS. 1 to 3 are schematic diagrams for explaining one example of the stack separator S. FIG.
【０００９】本発明のセパレータＳは、合計５枚の薄い
シート状の各部材が、例えば下敷きのように、全てやや
硬さがあると同時に可撓性を有する膨張黒鉛シートであ
る点に特徴がある。また本発明のセパレータＳは、流路
を囲むパッキン用の環状溝（矩形溝，円形溝など）が形
成されておらず、したがって、環状溝に嵌合するパッキ
ンを備えていない点に特徴がある。[0009] The separator S of the present invention is characterized in that all the five thin sheet-like members are expanded graphite sheets which are slightly hard and flexible at the same time, for example, as an underlay. is there. Further, the separator S of the present invention is characterized in that an annular groove (a rectangular groove, a circular groove, or the like) for packing surrounding a flow path is not formed, and therefore, there is no packing fitted in the annular groove. .
【００１０】１は５枚の薄いシート状の各部材の中で、
1番真中に位置するシートである。このシートを「膨張
黒鉛ベース板」と称することにする。この膨張黒鉛ベー
ス板１は、厚さは、本実施例では１ｍｍ前後の矩形板で
ある。大きさについては、例えば縦の長さ２００ｍｍ、
横１８０ｍｍである。もちろん、縦横の長さは流路をど
のようなパタンーに形成するか，マニホールド用の孔
（貫通孔＝供給孔，排出孔）の大きさをどうするか等の
観点から自由に設定することができる。厚さについて
は、内部に鉄製或いは，スチール製の金属繊維又は極薄
いシートを芯材とする場合があり得るので、１ｍｍ程度
が望ましい。膨張黒鉛ベース板１は、前記金属繊維等の
心材を有するか否かに拘わらず、ある程度の硬さを有
し、少なくとも可撓性を有する部材であることが必要で
ある。[0010] Among the five thin sheet-shaped members, 1
This is the sheet located in the middle of No. 1. This sheet is referred to as “expanded graphite base plate”. The expanded graphite base plate 1 is a rectangular plate having a thickness of about 1 mm in this embodiment. As for the size, for example, a vertical length of 200 mm,
It is 180 mm wide. Of course, the vertical and horizontal lengths can be freely set from the viewpoint of what kind of pattern the flow path is formed, and the size of manifold holes (through holes = supply holes, discharge holes). . The thickness is desirably about 1 mm because a metal material made of iron or steel or an extremely thin sheet may be used as a core material in some cases. The expanded graphite base plate 1 needs to be a member that has a certain degree of hardness and has at least flexibility regardless of whether or not it has the core material such as the metal fiber.
【００１１】２はマニホールド用の複数個の貫通孔で、
これらの貫通孔２は膨張黒鉛ベース板１の四隅にそれぞ
れ形成されている。Reference numeral 2 denotes a plurality of through holes for a manifold.
These through holes 2 are formed at four corners of the expanded graphite base plate 1 respectively.
【００１２】３は５枚の薄いシート状の各部材の中で、
膨張黒鉛ベース板１をサンドイッチ状挟んだシートであ
る。このシートを「膨張黒鉛流路板」と称することにす
る。この膨張黒鉛流路板３の厚，形状，大きさ、貫通
孔、軟性などは前記膨張黒鉛ベース板１と同一である。Reference numeral 3 denotes five thin sheet-shaped members.
This is a sheet in which the expanded graphite base plate 1 is sandwiched. This sheet will be referred to as "expanded graphite channel plate". The thickness, shape, size, through holes, softness, and the like of the expanded graphite channel plate 3 are the same as those of the expanded graphite base plate 1.
【００１３】しかして、４は縁部３ａを除いて該膨張黒
鉛流路板３に全体が複線状に形成された流路用切欠部で
ある。本実施例では、流路用切欠部４は規則的な蛇行状
の線を描いて始端側４ａから終端側４ｂへと形成されて
いる。普通一般にこのような規則的な蛇行状流路を有す
るセパレータは、隅角部に形成されたマニホルド用供給
孔に対して対角線側にマニホルド用排出孔６が形成され
ている。そこで、本実施例の膨張黒鉛流路板３も、その
隅角部の一つに供給孔５が形成されており、この供給孔
５と流路用切欠部４の始端４ａとが連通している。一
方、供給孔５に対して対角線側に排出孔６が形成されて
おり、この排出孔６と流路用切欠部４の終端４ｂとが連
通している。なお、供給孔５や排出孔６も区画された流
路の一部に過ぎない。Reference numeral 4 denotes a cut-out portion for the flow passage formed entirely in the form of a double line in the expanded graphite flow passage plate 3 except for the edge portion 3a. In this embodiment, the flow path notch 4 is formed from the start end 4a to the end 4b in a regular meandering line. Generally, in a separator having such a regular meandering flow path, a manifold discharge hole 6 is formed diagonally with respect to a manifold supply hole formed at a corner. Therefore, the expanded graphite flow channel plate 3 of the present embodiment also has a supply hole 5 formed at one of the corners thereof, and the supply hole 5 communicates with the starting end 4a of the cutout 4 for the flow channel. I have. On the other hand, a discharge hole 6 is formed on the diagonal side of the supply hole 5, and the discharge hole 6 communicates with the terminal end 4 b of the cutout 4 for the flow path. Note that the supply hole 5 and the discharge hole 6 are also only a part of the partitioned flow path.
【００１４】７は膨張黒鉛ベース板１を基準にして、該
膨張黒鉛ベース板１の上下側壁面に膨張黒鉛流路板３，
３を互いに背中合わせに貼り合わせた場合において、Ｉ
Ｎ側の供給孔５とＯＵＴ側の排出孔６にそれぞれ連通す
る連通孔（＝流路の一部）である。 なお、図２におい
て、上下の膨張黒鉛流路板３，３は同一であるが、膨張
黒鉛ベース板１を基準にし、下方の膨張黒鉛流路板３は
ひっくり返されており、上方の膨張黒鉛流路板３に対し
て背中合わせの格好となる（図２の符合の位置に注
意）。Reference numeral 7 denotes an expanded graphite channel plate 3 on the upper and lower side walls of the expanded graphite base plate 1 with reference to the expanded graphite base plate 1.
3 are bonded together back to back,
It is a communication hole (= a part of the flow path) communicating with the supply hole 5 on the N side and the discharge hole 6 on the OUT side. In FIG. 2, the upper and lower expanded graphite flow path plates 3 and 3 are the same, but the lower expanded graphite flow path plate 3 is turned upside down with respect to the expanded graphite base plate 1 and the upper expanded graphite flow path 3 is turned upside down. It looks like back to back with respect to the road board 3 (note the position of the sign in FIG. 2).
【００１５】これらの連通孔７，７は、供給孔５や排出
孔６に対して対角線側に位置している。したがって、膨
張黒鉛流路板３も膨張黒鉛ベース板１と同様に膨張黒鉛
ベース板１の貫通孔２と連通するように四隅に供給孔
５、排出孔６、連通孔７がそれぞれ形成されている。The communication holes 7 are located diagonally to the supply hole 5 and the discharge hole 6. Therefore, supply holes 5, discharge holes 6, and communication holes 7 are formed at the four corners of the expanded graphite flow path plate 3 at the four corners so as to communicate with the through-holes 2 of the expanded graphite base plate 1, similarly to the expanded graphite base plate 1. .
【００１６】８は薄い額縁状の膨張黒鉛枠板で、この膨
張黒鉛枠板８はパッキン機能を発揮されるために前記膨
張黒鉛流路板３の壁面に合わせられている。この膨張黒
鉛流路板３は流路に関係ない反面、パッキン機能を発揮
されるための部材であるから、前述した供給孔５、排出
孔６等を塞がないように膨張黒鉛流路板３に対して上下
にサンドイッチ状に圧着されている。本実施例では、膨
張黒鉛枠板８の軽量化を図るためにその縁部８ａの幅寸
法を狭くしてある。Reference numeral 8 denotes a thin frame-shaped expanded graphite frame plate. The expanded graphite frame plate 8 is fitted to the wall surface of the expanded graphite channel plate 3 so as to exhibit a packing function. Although the expanded graphite channel plate 3 is not related to the flow channel, it is a member for exhibiting a packing function. Therefore, the expanded graphite channel plate 3 is so formed as not to block the above-mentioned supply hole 5, discharge hole 6 and the like. Are sandwiched vertically in a sandwich shape. In the present embodiment, the width of the edge 8a is reduced in order to reduce the weight of the expanded graphite frame plate 8.
【００１７】図１は説明の便宜上、厚さや寸法に拘らな
いで概念的に図示してあるが、図２及び図３で示すよう
に、1番真中に位置する膨張黒鉛ベース板１を基準にし
て膨張黒鉛流路板３及び膨張黒鉛枠板８がそれぞれ上下
からサンドイッチ状に一体的に積層されて１つのセパレ
ータＳを成している。FIG. 1 is conceptually shown irrespective of the thickness and dimensions for convenience of explanation, but as shown in FIGS. 2 and 3, the expanded graphite base plate 1 located at the center of the center is used as a reference. Thus, the expanded graphite flow path plate 3 and the expanded graphite frame plate 8 are integrally laminated in a sandwich manner from above and below, respectively, to form one separator S.
【００１８】そこで、このセパレータＳを製造する方法
について説明する。なお、方法の説明に当たって、前記
セパレータＳの符号をそのまま用い、重複する説明を省
略する。Therefore, a method of manufacturing the separator S will be described. In the description of the method, the same reference numerals as those of the separator S are used as they are, and redundant description will be omitted.
【００１９】図４は膨張黒鉛ベース板形成工程Ａを示
す。この膨張黒鉛ベース板形成工程Ａでは、ロール状膨
張黒鉛シート１０を複数個のガイドローラ１１を介して
切断機１２の下方へと案内し、かつ、前記切断機１２の
昇降動するカッター１３で膨張黒鉛シート１０を所定寸
法に適宜切断する切断工程Ａ１と、この切断工程Ａ１に
よって得られた所定寸法膨張黒鉛シート１０Ａを基材と
し、貫通孔形成用金型１４を用いてプレス加工し、か
つ、四隅に貫通孔２を有する膨張黒鉛ベース板１を形成
するマニホールド用貫通孔形成工程Ａ２とを備えてい
る。FIG. 4 shows an expanded graphite base plate forming step A. In the expanded graphite base plate forming step A, the rolled expanded graphite sheet 10 is guided below the cutting machine 12 via a plurality of guide rollers 11 and is expanded by the cutter 13 which moves up and down the cutting machine 12. A cutting step A1 for appropriately cutting the graphite sheet 10 into a predetermined dimension, and a predetermined dimension expanded graphite sheet 10A obtained in the cutting step A1 as a base material, and press working using a through-hole forming die 14, and And a through hole forming step A2 for forming an expanded graphite base plate 1 having through holes 2 at four corners.
【００２０】次にＢは一側面に流路形成用刃１５を有す
る平盤状の切欠形成機１６を所定位置まで昇降動させ、
流路用切欠部４，供給孔５及び排出孔６を有する膨張黒
鉛流路板３を形成する膨張黒鉛流路板形成工程である。
この膨張黒鉛流路板形成工程Ｂでは、切欠形成機１６の
前記流路形成用刃１５で、例えば蛇行状の開口＝切欠を
形成するのであって、溝を形成する訳ではない。Next, B moves a flat plate-shaped notch forming machine 16 having a flow path forming blade 15 on one side surface up and down to a predetermined position,
This is an expanded graphite flow path plate forming step of forming the expanded graphite flow path plate 3 having the flow path cutouts 4, the supply holes 5, and the discharge holes 6.
In the expanded graphite flow path plate forming step B, for example, a meandering opening = notch is formed by the flow path forming blade 15 of the notch forming machine 16, and a groove is not formed.
【００２１】次にＣは、一側面に矩形状に突設された額
縁形成刃１７を有する平盤状の額縁形成機１８を所定位
置まで昇降動させ、幅広の矩形状開口窓部１９を有する
薄い額縁状の膨張黒鉛枠板８を形成する膨張黒鉛枠板形
成工程である。Next, C has a wide rectangular opening window 19 by moving a flat plate-shaped frame forming machine 18 having a frame forming blade 17 protruding in a rectangular shape on one side surface up and down to a predetermined position. This is an expanded graphite frame plate forming step for forming a thin frame-shaped expanded graphite frame plate 8.
【００２２】最後にＤは、膨張黒鉛ベース板１を1番真
中に位置付け、この膨張黒鉛ベース板１を基準として該
膨張黒鉛ベース板１の両側面に膨張黒鉛流路板３を互い
に背を合わせるようにサンドイッチ状に接合させ、さら
に、これら上下の膨張黒鉛流路板３，３の壁面に膨張黒
鉛枠板８，８をサンドイッチ状に接合させる５枚板接合
・圧着工程である。これにより、本発明のセパレータＳ
が出来上がる。Finally, D indicates that the expanded graphite base plate 1 is positioned at the center of the center, and the expanded graphite channel plate 3 is placed on both sides of the expanded graphite base plate 1 with the expanded graphite base plate 1 as a reference. This is a five-plate joining and crimping step in which the expanded graphite frame plates 8, 8 are joined to the upper and lower wall surfaces of the expanded graphite flow path plates 3, 3 in a sandwich shape. Thereby, the separator S of the present invention
Is completed.
【００２３】この５枚板接合・圧着工程Ｄでは、膨張黒
鉛ベース板１の上下の壁面に膨張黒鉛流路板３をそれぞ
れ載せると、膨張黒鉛流路板３の切欠部４が、恰も溝が
切られているような状態となる。したがって、膨張黒鉛
ベース板１に膨張黒鉛流路板３を一体的に固定すると、
酸化剤ガス又は燃料ガス用の流路が出来上がる。また合
計５枚板の薄い膨張黒鉛シートが一体的に積層された場
合には、前記膨張黒鉛枠板８，８の縁部８ａはパッキン
の機能を果たす。したがって、セパレータＳの膨張黒鉛
枠板８，８そのものがパッキン材の役割を果たす。In the five-plate joining / compression bonding step D, when the expanded graphite channel plate 3 is placed on the upper and lower wall surfaces of the expanded graphite base plate 1, the notch 4 of the expanded graphite channel plate 3 is It is as if it were cut off. Therefore, when the expanded graphite channel plate 3 is integrally fixed to the expanded graphite base plate 1,
A flow path for oxidant gas or fuel gas is completed. When a total of five thin expanded graphite sheets are integrally laminated, the edges 8a of the expanded graphite frame plates 8, 8 function as a packing. Therefore, the expanded graphite frame plates 8 of the separator S themselves serve as a packing material.
【００２４】上記製造方法で得られたセパレータＳは燃
料電池のスタックを製造するために使用される。セパレ
ータＳのアセンブリーの際には、例えば図５で示すよう
にセパレータＳ同志に、多孔性支持プレート２０、図示
しない貫通孔が形成された支持集電体２１、両側面に電
極を有する透過性イオン交換膜２２を介在させ、最終的
には、図示しない固定板、この固定板の孔に通される螺
杆，ナットなど固着手段を利用して一体的に固定され
る。なお、セパレータＳのアセンブリーの際には色々な
固定方法がある。また、本実施例では、その他のマニホ
ルド用の孔などは省略してある。The separator S obtained by the above-mentioned manufacturing method is used for manufacturing a fuel cell stack. At the time of assembling the separator S, for example, as shown in FIG. 5, a porous support plate 20, a support current collector 21 having through holes (not shown) formed therein, The exchange membrane 22 is interposed therebetween, and finally, it is integrally fixed using a fixing plate (not shown), a fixing member such as a screw rod or a nut which is passed through a hole of the fixing plate. There are various fixing methods when assembling the separator S. In this embodiment, other manifold holes and the like are omitted.
【００２５】[0025]
【実施例】発明の実施形態で説明した実施例では、膨張
黒鉛流路板の流路用切欠部４は、規則的な蛇行状の線を
描いて始端側４ａから終端側４ｂへと形成されている
が、規則的な蛇行状である必要はない。例えば渦巻き状
であったも良い。膨張黒鉛ベース板１は、本実施例では
厚さ１ｍｍで、大きさは、縦の長さ２００ｍｍ、横１８
０ｍｍであるが、大きさやその形状については、特に拘
らない。ただし、厚さは１ｍｍ膳後が望ましい。また膨
張黒鉛枠板８の縁部８ａを幅広に形成し、適宜部位にマ
ニホルド用の貫通孔を形成しても良いが、本実施例のよ
うに縁部８ａの寸法を狭くするのが望ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment described in the embodiment of the present invention, the cutout 4 for the flow channel of the expanded graphite flow channel plate is formed from the start end 4a to the end 4b in a regular meandering line. But need not be regular meandering. For example, it may be spiral. In this embodiment, the expanded graphite base plate 1 has a thickness of 1 mm, a size of 200 mm in length and 18 mm in width.
Although it is 0 mm, its size and shape are not particularly limited. However, the thickness is desirably after 1 mm. Further, the edge 8a of the expanded graphite frame plate 8 may be formed to be wide and a through hole for a manifold may be formed at an appropriate portion. However, it is desirable to reduce the size of the edge 8a as in this embodiment.
【００２６】[0026]
【発明の効果】（１）全ての素板が薄いシート状可撓性
膨張黒鉛で出来ているので、軽量性や気密性に優れてい
る。特にスタックを製造する際に弾性パッキンを使用し
なくても良いので、製造効率が高まると共に、作業上の
デメリット（弾性パッキンの入れ忘れ）も解消すること
ができる。 （２）弾性パッキンを使用しなくても良い，上下の薄い
シート状膨張黒鉛流路板３並びに膨張黒鉛枠板８は同一
なので、大量生産に適したセパレータＳを安価に提供す
ることができる。 （３）パッキン機能を有する額縁部材そのものの幅を狭
く（額縁の軽量化）することができる。(1) Since all base plates are made of thin sheet-like flexible expanded graphite, they are excellent in lightness and airtightness. In particular, since it is not necessary to use the elastic packing when manufacturing the stack, the manufacturing efficiency can be improved and the disadvantage in work (forgetting to insert the elastic packing) can be eliminated. (2) Since the upper and lower thin sheet-like expanded graphite flow path plates 3 and the expanded graphite frame plate 8 need not use an elastic packing, the separator S suitable for mass production can be provided at low cost. (3) The width of the frame member itself having the packing function can be reduced (the weight of the frame can be reduced).
図１乃至図４は本発明の一実施例を示す各説明図。図５
は発明の実施形態の一例を示す概略説明図。1 to 4 are explanatory views showing one embodiment of the present invention. FIG.
1 is a schematic explanatory view showing an example of an embodiment of the present invention.
【図１】セパレータを構成する５枚の膨張黒鉛シートを
重ね合わせた場合の概念的な説明図。FIG. 1 is a conceptual explanatory diagram when five expanded graphite sheets constituting a separator are superposed.
【図２】セパレータの分解斜視図。FIG. 2 is an exploded perspective view of a separator.
【図３】５枚の膨張黒鉛シートを一体的に接合する場合
の概略説明図。FIG. 3 is a schematic explanatory view in a case where five expanded graphite sheets are integrally joined.
【図４】セパレータの製造方法を示す工程図。FIG. 4 is a process chart showing a method for manufacturing a separator.
【図５】実施の形態の一例を示す説明図。FIG. 5 is an explanatory diagram illustrating an example of an embodiment.
Ｓ…セパレータ、１…膨張黒鉛ベース板、２…貫通孔、
３…膨張黒鉛流路板、４…流路用切欠部、４ａ…始端、
４ｂ…終端、５…供給孔、６…排出孔、７…連通孔、８
…膨張黒鉛枠板、８ａ…縁部、１０…ロール状膨張黒鉛
シート、１２…切断機、１０Ａ…所定寸法膨張黒鉛シー
ト、１６…切欠形成機、１８…額縁形成機、Ａ…膨張黒
鉛ベース板形成工程、Ｂ…膨張黒鉛流路板形成工程、Ｃ
…膨張黒鉛枠板形成工程、Ｄ…５枚板接合・圧着工程
Ｄ。S: separator, 1: expanded graphite base plate, 2: through hole,
3 ... Expanded graphite flow path plate, 4 ... Notch for flow path, 4a ... Start end,
4b: terminal end, 5: supply hole, 6: discharge hole, 7: communication hole, 8
... Expanded graphite frame plate, 8a ... Edge, 10 ... Rolled expanded graphite sheet, 12 ... Cutting machine, 10A ... Expanded graphite sheet of predetermined dimensions, 16 ... Notch forming machine, 18 ... Frame forming machine, A ... Expanded graphite base plate Forming process, B ... Expanded graphite flow channel plate forming process, C
... Expansion graphite frame plate forming process, D ... Five-plate joining / compression bonding process D.
Claims (4)
撓性膨張黒鉛ベース板１、流路用切欠部４，前記貫通孔
にそれぞれ連通可能な供給孔５及び排出孔６を有する一
対の薄いシート状膨張黒鉛流路板３、幅広の開口窓部１
９を有すると共に縁部８ａがパッキン機能を有する薄い
額縁状の一対の膨張黒鉛枠板８とから成り、前記膨張黒
鉛ベース板１を基準として該膨張黒鉛ベース板１の両側
面に膨張黒鉛流路板３をサンドイッチ状に接合し、さら
に、これら上下の膨張黒鉛流路板３，３の壁面に前記膨
張黒鉛枠板８，８がサンドイッチ状に接合・圧着されて
いることを特徴とする燃料電池のスタック用セパレー
タ。1. A thin sheet-like flexible expanded graphite base plate 1 having through holes 2 at four corners, a cutout portion 4 for a flow path, and a pair of supply holes 5 and discharge holes 6 which can communicate with the through holes, respectively. Thin sheet-shaped expanded graphite channel plate 3, wide open window 1
9 and a pair of thin frame-shaped expanded graphite frame plates 8 having edges 8a having a packing function, and the expanded graphite flow path is formed on both sides of the expanded graphite base plate 1 with respect to the expanded graphite base plate 1. A fuel cell, wherein the plates 3 are joined in a sandwich shape, and the expanded graphite frame plates 8, 8 are joined and crimped to the upper and lower wall surfaces of the expanded graphite flow passage plates 3, 3 in a sandwich shape. Stack separator.
１、膨張黒鉛流路板３及び膨張黒鉛枠板８は、やや硬さ
があると同時に可撓性を有する素材であることを特徴と
する燃料電池のスタック用セパレータ。2. An expanded graphite base plate 1, an expanded graphite flow channel plate 3, and an expanded graphite frame plate 8 according to claim 1, wherein the expanded graphite base plate 1, the expanded graphite frame plate 8 is made of a material which is slightly hard and has flexibility. Fuel cell stack separator.
は１ｍｍ前後であることを特徴とする燃料電池のスタッ
ク用セパレータ。3. The expanded graphite base plate according to claim 2,
Is a fuel cell stack separator characterized by having a length of about 1 mm.
孔２を有する薄いシート状膨張黒鉛ベース板１を形成す
る膨張黒鉛ベース板形成工程Ａと、流路用切欠部４，供
給孔５及び排出孔６を有する膨張黒鉛流路板３を形成す
る薄いシート状膨張黒鉛流路板形成工程Ｂと、幅広の開
口窓部１９を有する薄い額縁状の膨張黒鉛枠板８を形成
する膨張黒鉛枠板形成工程Ｃと、前記膨張黒鉛ベース板
形成工程Ａで形成された膨張黒鉛ベース板１を1番真中
に位置付け、この膨張黒鉛ベース板１を基準として該膨
張黒鉛ベース板１の両側面に前記膨張黒鉛流路板形成工
程Ｂで形成された膨張黒鉛流路板３を互いに背を合わせ
るようにサンドイッチ状に接合させ、さらに、これら上
下の膨張黒鉛流路板３，３の壁面に前記膨張黒鉛枠板形
成工程Ｃで形成された膨張黒鉛枠板８，８をサンドイッ
チ状に接合させる５枚板接合・圧着工程Ｄとを備える燃
料電池のスタック用セパレータの製造方法。4. An expanded graphite base plate forming step A for forming a thin sheet-like expanded graphite base plate 1 cut into predetermined dimensions and having through holes 2 at four corners; And a thin sheet-like expanded graphite flow channel plate forming step B for forming the expanded graphite flow channel plate 3 having the discharge holes 6 and the expanded graphite for forming the thin frame-shaped expanded graphite frame plate 8 having the wide opening windows 19. The expanded graphite base plate 1 formed in the frame plate forming step C and the expanded graphite base plate forming step A is positioned at the center, and on both sides of the expanded graphite base plate 1 based on the expanded graphite base plate 1. The expanded graphite flow channel plates 3 formed in the expanded graphite flow channel plate forming step B are joined in a sandwich shape so as to be opposed to each other, and the expanded graphite flow channel plates 3 Formed in the graphite frame plate forming process C Method for producing an expanded graphite frame plate 8,8 separator stack of fuel cells and a five plate bonding and pressure bonding step D of bonding to the sandwich.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113636A JP3616787B2 (en) | 2000-04-14 | 2000-04-14 | Fuel cell stack separator and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113636A JP3616787B2 (en) | 2000-04-14 | 2000-04-14 | Fuel cell stack separator and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001297778A true JP2001297778A (en) | 2001-10-26 |
| JP3616787B2 JP3616787B2 (en) | 2005-02-02 |
Family
ID=18625566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000113636A Expired - Fee Related JP3616787B2 (en) | 2000-04-14 | 2000-04-14 | Fuel cell stack separator and method of manufacturing the same |
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| Country | Link |
|---|---|
| JP (1) | JP3616787B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005183156A (en) * | 2003-12-19 | 2005-07-07 | Sankei Giken Kogyo Co Ltd | Separator for fuel cell |
| JP2006501621A (en) * | 2002-09-30 | 2006-01-12 | アドバンスド、エナジー、テクノロジー、インコーポレーテッド | Graphite products useful as a base material for fuel cell components |
| CN100438172C (en) * | 2006-03-15 | 2008-11-26 | 台达电子工业股份有限公司 | Fuel cell and fuel transport module thereof |
| US7662499B2 (en) | 2002-07-31 | 2010-02-16 | Sfc Smart Fuel Cell Ag | Plate elements for fuel cell stacks |
| CN1977415B (en) * | 2004-07-01 | 2010-07-28 | 尤米科尔股份公司及两合公司 | Lamination process for manufacture of integrated membrane-electrode-assemblies |
| US8057743B2 (en) * | 2007-06-15 | 2011-11-15 | Hipep Laboratories | Micro-passage chip |
| JP2015516107A (en) * | 2012-05-03 | 2015-06-04 | インペリアル・イノベ−ションズ・リミテッド | Fuel cell |
-
2000
- 2000-04-14 JP JP2000113636A patent/JP3616787B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7662499B2 (en) | 2002-07-31 | 2010-02-16 | Sfc Smart Fuel Cell Ag | Plate elements for fuel cell stacks |
| JP2006501621A (en) * | 2002-09-30 | 2006-01-12 | アドバンスド、エナジー、テクノロジー、インコーポレーテッド | Graphite products useful as a base material for fuel cell components |
| JP2005183156A (en) * | 2003-12-19 | 2005-07-07 | Sankei Giken Kogyo Co Ltd | Separator for fuel cell |
| CN1977415B (en) * | 2004-07-01 | 2010-07-28 | 尤米科尔股份公司及两合公司 | Lamination process for manufacture of integrated membrane-electrode-assemblies |
| CN100438172C (en) * | 2006-03-15 | 2008-11-26 | 台达电子工业股份有限公司 | Fuel cell and fuel transport module thereof |
| US8057743B2 (en) * | 2007-06-15 | 2011-11-15 | Hipep Laboratories | Micro-passage chip |
| JP2015516107A (en) * | 2012-05-03 | 2015-06-04 | インペリアル・イノベ−ションズ・リミテッド | Fuel cell |
| US10483583B2 (en) | 2012-05-03 | 2019-11-19 | Imperial Innovations Limited | Fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3616787B2 (en) | 2005-02-02 |
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