JP2007172992A - Fuel cell separator and its manufacturing method - Google Patents

Fuel cell separator and its manufacturing method Download PDF

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JP2007172992A
JP2007172992A JP2005368255A JP2005368255A JP2007172992A JP 2007172992 A JP2007172992 A JP 2007172992A JP 2005368255 A JP2005368255 A JP 2005368255A JP 2005368255 A JP2005368255 A JP 2005368255A JP 2007172992 A JP2007172992 A JP 2007172992A
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separators
pair
fuel cell
cell separator
seal member
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JP5344786B2 (en
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Shigetaka Uehara
茂高 上原
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Nissan Motor Co Ltd
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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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a simple separator with damage prevented. <P>SOLUTION: A pair of separators 1, 2 each at an anode side and a cathode side are arranged in contact with each other in a molding die 21 so as their gas flow channels 3, 4 to be faced outside, respectively, and a sealing material is injected along outer edge parts 6, 8 of the separators 1, 2 through a gate 26 fitted to the molding die 21. The sealant is filled in a first space 15 formed pinched by the outer edge parts 6, 8 of the pair of separators 1, 2, as well as in second spaces 31, 32 formed between the outer edge parts 6, 8 of the pair of separators 1, 2 and the molding die 21, and the sealing materials filled in the spaces constitute a continuous sealing member 10 to integrate the pair of separators 1, 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、燃料電池セパレータ及びその製造方法に関するものである。   The present invention relates to a fuel cell separator and a manufacturing method thereof.

射出成形機金型を用いてセパレータにシール部を成形する方法が特許文献１に開示されている。
特開平１１−３０９７４７ Patent Document 1 discloses a method of forming a seal portion on a separator using an injection molding machine mold.
JP-A-11-309747

特許文献１に記載の方法は、セパレータに対して垂直方向からシール材注入ゲートが設けられているため、初期射出圧でセパレータが破損又は変形する可能性がある。   In the method described in Patent Document 1, since the sealing material injection gate is provided from the direction perpendicular to the separator, the separator may be damaged or deformed by the initial injection pressure.

また、アノード側とカソード側のセパレータに対して別個にシール部を成形する必要があり、かつシール部の成形後、双方のセパレータ同士を一体に接着する必要もあるため、大変な労力を要する。   Further, since it is necessary to separately form the seal portion for the anode side and cathode side separators, and after the seal portion is formed, it is necessary to bond both the separators together, which requires a lot of labor.

本発明は、上記の問題点に鑑みてなされたものであり、セパレータの破損を防止することができ、かつ簡便なセパレータの製造方法を提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a simple separator manufacturing method that can prevent the separator from being damaged.

本発明は、一方の面にアノードガス流路を有すると共に他方の面にカソードガス流路を有し、それぞれの面が電解質膜に電極を配置してなる膜電極接合体に当接する燃料電池セパレータの製造方法である。この製造方法は、アノード側とカソード側との一対のセパレータをそれぞれのガス流路が外側となるように接触させて成形型内に配置し、前記成形型に設けられたゲートを通じて前記一対のセパレータの外縁部に沿ってシール材を注入し、前記シール材は、前記一対のセパレータの外縁部に挟まれて形成される第一の空間に充填されると共に、前記一対のセパレータの外縁部と前記成形型とで形成される第二の空間に充填され、前記双方の空間に充填されたシール材が連続したシール部材を構成することによって前記一対のセパレータが一体化される。   The present invention provides a fuel cell separator having an anode gas flow channel on one surface and a cathode gas flow channel on the other surface, each surface contacting a membrane electrode assembly in which an electrode is disposed on an electrolyte membrane. It is a manufacturing method. In this manufacturing method, a pair of separators on the anode side and the cathode side are arranged in a mold so that the respective gas flow paths are on the outside, and the pair of separators are arranged through a gate provided in the mold. The sealing material is injected along the outer edge portion of the pair of separators, and the sealing material is filled in a first space formed between the outer edge portions of the pair of separators, and the outer edge portions of the pair of separators and the The pair of separators are integrated by forming a sealing member in which the second space formed by the molding die is filled and the sealing material filled in both the spaces constitutes a continuous seal member.

本発明によれば、シール材は一対のセパレータの外縁部に沿って注入されるため、セパレータの破損を防止することができる。また、一対のセパレータは、連続したシール部材を介して一体化されるため、別個にシール部材を形成する必要がなく簡便にセパレータを製造することができる。   According to the present invention, since the sealing material is injected along the outer edges of the pair of separators, the separator can be prevented from being damaged. Moreover, since a pair of separator is integrated via the continuous sealing member, it is not necessary to form a sealing member separately and can manufacture a separator simply.

以下、図面を参照して本発明の実施の形態を説明する。図１は本発明の製造方法によって得られた燃料電池セパレータの平面概略図であり、実施の形態１では燃料電池セパレータ１００、実施の形態２では燃料電池セパレータ２００における平面概略図として説明する。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a fuel cell separator obtained by the production method of the present invention. The fuel cell separator 100 according to the first embodiment and the fuel cell separator 200 according to the second embodiment will be described as schematic plan views.

（実施の形態１）
図２、図３を参照して、本発明の実施の形態１について説明する。図２は図１におけるＡ−Ａ断面の断面概略図であり、図３は燃料電池セパレータ１００を用いた燃料電池の模式図である。 (Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS. 2 is a schematic cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a schematic diagram of a fuel cell using the fuel cell separator 100.

燃料電池セパレータ１００は、図２に示すように、電解質膜の両面に電極を配置してなる膜電極接合体（図３符号３０）に当接して配置されるアノード側セパレータ１とカソード側セパレータ２との一対のセパレータを備える。この一対のセパレータ１、２は外縁に形成されたシール部材１０を介して、一方の面にアノードガス流路３を有すると共に他方の面にカソードガス流路４を有するように一体に固定される。   As shown in FIG. 2, the fuel cell separator 100 includes an anode-side separator 1 and a cathode-side separator 2 disposed in contact with a membrane electrode assembly (reference numeral 30 in FIG. 3) in which electrodes are disposed on both surfaces of an electrolyte membrane. And a pair of separators. The pair of separators 1 and 2 are integrally fixed through a seal member 10 formed on the outer edge so as to have the anode gas flow path 3 on one surface and the cathode gas flow path 4 on the other surface. .

このように、燃料電池セパレータ１００は、図３に示すように、膜電極接合体３０に挟まれて配置され、アノード側セパレータ１におけるアノードガス流路３を有する面が膜電極接合体３０のアノード電極に、カソード側セパレータ２におけるカソードガス流路４を有する面が膜電極接合体３０のカソード電極に当接する態様で配置される。   Thus, as shown in FIG. 3, the fuel cell separator 100 is disposed between the membrane electrode assemblies 30, and the surface of the anode separator 1 having the anode gas flow path 3 is the anode of the membrane electrode assembly 30. The surface of the cathode-side separator 2 having the cathode gas flow path 4 is disposed on the electrode in such a manner that it contacts the cathode electrode of the membrane electrode assembly 30.

なお、図１に示す符号４１は燃料ガス入口マニホールド、４２は燃料ガス出口マニホールド、４３は酸化剤ガス入口マニホールド、４４は酸化剤ガス出口マニホールド、４５は冷却水入口マニホールド、４６は冷却水出口マニホールドである。   1 is a fuel gas inlet manifold, 42 is a fuel gas outlet manifold, 43 is an oxidant gas inlet manifold, 44 is an oxidant gas outlet manifold, 45 is a cooling water inlet manifold, and 46 is a cooling water outlet manifold. It is.

アノード側セパレータ１は、図２に示すように、アノードガス流路３として機能する波状部５と、波状部５の外縁に平板状に形成されシール部材１０が形成される外縁部としての平板部６とを有する。また、カソード側セパレータ２も、カソードガス流路４として機能する波状部７と、波状部７の外縁に平板状に形成されシール部材１０が形成される外縁部としての平板部８とを有する。このように、アノード側セパレータ１とカソード側セパレータ２とは、同様の形状を有している。   As shown in FIG. 2, the anode-side separator 1 includes a corrugated portion 5 that functions as the anode gas flow path 3, and a flat plate portion as an outer edge portion that is formed in a flat plate shape on the outer edge of the corrugated portion 5 and the sealing member 10 is formed 6. The cathode-side separator 2 also has a corrugated portion 7 that functions as the cathode gas flow path 4, and a flat plate portion 8 as an outer peripheral portion that is formed in a flat plate shape on the outer edge of the corrugated portion 7 and the sealing member 10 is formed. Thus, the anode side separator 1 and the cathode side separator 2 have the same shape.

波状部５、７は、山部１１と谷部１２とが一定の間隔にて複数形成された形状であり、平板部６、８は、波状部５、７の最外端の谷部１２ａに連続して形成される。   The wavy portions 5 and 7 have a shape in which a plurality of crest portions 11 and trough portions 12 are formed at regular intervals, and the flat plate portions 6 and 8 are formed on the trough portions 12 a at the outermost ends of the wavy portions 5 and 7. It is formed continuously.

アノード側セパレータ１とカソード側セパレータ２とは、それぞれの波状部５、７の谷部１２同士が接触して配置される。これにより、燃料電池セパレータ１００は、一方の面にアノードガス流路３を有すると共に他方の面にカソードガス流路４を有し、かつアノード側セパレータ１及びカソード側セパレータ２との間には各々の山部１１によって画成される複数の冷却水流路１３が形成される。   The anode-side separator 1 and the cathode-side separator 2 are arranged such that the valley portions 12 of the corrugated portions 5 and 7 are in contact with each other. As a result, the fuel cell separator 100 has the anode gas flow path 3 on one side and the cathode gas flow path 4 on the other side, and between the anode side separator 1 and the cathode side separator 2, respectively. A plurality of cooling water flow paths 13 defined by the peak portions 11 are formed.

平板部６と平板部８は平行に延在し、かつ波状部５、７の最外端の谷部１２ａから連続して形成される。これにより、平板部６、８と谷部１２ａとによって、一対のセパレータ１、２の間には、一対のセパレータ外縁に開口部１４を有し平板部６、８に挟まれた第一の空間１５が形成される。なお、平板部６、８には、連通孔６ａ、８ａが形成される。   The flat plate portion 6 and the flat plate portion 8 extend in parallel and are continuously formed from the trough portions 12a at the outermost ends of the wavy portions 5 and 7. Thus, the first space between the pair of separators 1 and 2 having the opening 14 at the outer edge of the pair of separators and sandwiched between the flat plates 6 and 8 by the flat plate portions 6 and 8 and the valley portion 12a. 15 is formed. The flat plate portions 6 and 8 are formed with communication holes 6a and 8a.

シール部材１０は、第一の空間１５に充填された第一のシール部材１６と、一対のセパレータ１、２の平板部６、８における膜電極接合体３０との対向面６ｂ、８ｂのそれぞれに形成された第二のシール部材１７、１８とを有する。   The seal member 10 is provided on each of the facing surfaces 6b and 8b of the first seal member 16 filled in the first space 15 and the membrane electrode assembly 30 in the flat plate portions 6 and 8 of the pair of separators 1 and 2, respectively. It has the 2nd sealing members 17 and 18 formed.

一対のセパレータ１、２の外端部、つまり平板部６、８の端面６ｃ、８ｃは、シール部材１０から露出して形成され、第一のシール部材１６と第二のシール部材１７、１８とは一対のセパレータ１、２によって隔てられている。しかし、第一のシール部材１６と第二のシール部材１７、１８とは、平板部６、８に形成された連通孔６ａ、８ａを通じて連続した状態で形成されている。つまり、シール部材１０は、一体構造をなしている。このように、第一のシール部材１６と第二のシール部材１７、１８とが連続して形成されることによって、一対のセパレータ１、２が一体化されて燃料電池セパレータ１００を構成する。   The outer end portions of the pair of separators 1 and 2, that is, the end surfaces 6 c and 8 c of the flat plate portions 6 and 8 are formed to be exposed from the seal member 10, and the first seal member 16 and the second seal members 17 and 18 are formed. Are separated by a pair of separators 1,2. However, the first seal member 16 and the second seal members 17 and 18 are formed in a continuous state through the communication holes 6 a and 8 a formed in the flat plate portions 6 and 8. That is, the seal member 10 has an integral structure. As described above, the first seal member 16 and the second seal members 17 and 18 are continuously formed, whereby the pair of separators 1 and 2 are integrated to constitute the fuel cell separator 100.

なお、第二のシール部材１７、１８における内縁、すなわちアノードガス流路３又はカソードガス流路４の外周に沿った領域に、図２に示すような突起状シール部材１７ａ、１８ａを形成するようにしてもよい。このように、構成することによって、一対のセパレータ１、２と膜電極接合体３０とが当接した場合に、突起状シール部材１７ａ、１８ａが圧縮変形されるため、膜電極接合体３０とセパレータ１、２との気密を向上させることができる。   It should be noted that protruding seal members 17a and 18a as shown in FIG. 2 are formed on the inner edges of the second seal members 17 and 18, that is, in the region along the outer periphery of the anode gas channel 3 or the cathode gas channel 4. It may be. Thus, when the pair of separators 1 and 2 and the membrane electrode assembly 30 come into contact with each other, the protruding seal members 17a and 18a are compressed and deformed. The airtightness with 1 and 2 can be improved.

次に、図４を参照して燃料電池セパレータ１００の製造方法について説明する。図４は、シール部材を成形する方法を説明する図である。   Next, a method for manufacturing the fuel cell separator 100 will be described with reference to FIG. FIG. 4 is a diagram for explaining a method of forming a seal member.

燃料電池セパレータ１００は、成形型２１を用いて一対のセパレータ１、２の平板部６、８にシール部材１０を成形することによって製造される。   The fuel cell separator 100 is manufactured by molding the seal member 10 on the flat plate portions 6 and 8 of the pair of separators 1 and 2 using the molding die 21.

成形型２１は、上側２２と下型２３とからなる。上側２２と下型２３とを組み合わせることによって、成形型２１内には、一対のセパレータ１、２の波状部５、７が収容される収容部２４と、平板部６、８にシール部材１０を成形するためのキャビティ２５と、シール材の注入口である注入ゲート２６と、キャビティ２５と注入ゲート２６とを繋ぐフィルムゲート２７とが形成される。   The molding die 21 includes an upper side 22 and a lower die 23. By combining the upper side 22 and the lower die 23, the molding die 21 has the accommodating portion 24 in which the corrugated portions 5 and 7 of the pair of separators 1 and 2 are accommodated, and the sealing member 10 in the flat plate portions 6 and 8. A cavity 25 for molding, an injection gate 26 serving as an inlet for a sealing material, and a film gate 27 connecting the cavity 25 and the injection gate 26 are formed.

まず、図４に示すように、一対のセパレータ１、２を、双方の谷部１２同士が接触した状態、つまりアノードガス流路３とカソードガス流路４とが外側になるように接触させて成形型２１内に配置する。   First, as shown in FIG. 4, a pair of separators 1 and 2 are brought into contact with each other so that both valleys 12 are in contact with each other, that is, the anode gas flow path 3 and the cathode gas flow path 4 are outside. It arrange | positions in the shaping | molding die 21. FIG.

これにより、一対のセパレータ１、２の波状部５、７は収容部２４に収容され、平板部６、８はキャビティ２５に収容される。この状態において、平板部の端面６ｃ、８ｃは、キャビティ２５内壁に当接し、キャビティ２５を三つの空間に分割する。具体的には、キャビティ２５は、一対のセパレータ１、２の平板部６、８に挟まれて形成される第一の空間１５と、平板部６、８とキャビティ２５内壁とで形成される第二の空間３１、３２とに分割される。   Thereby, the corrugated portions 5 and 7 of the pair of separators 1 and 2 are accommodated in the accommodating portion 24, and the flat plate portions 6 and 8 are accommodated in the cavity 25. In this state, the end surfaces 6c and 8c of the flat plate portion abut against the inner wall of the cavity 25 and divide the cavity 25 into three spaces. Specifically, the cavity 25 is a first space 15 formed by being sandwiched between the flat plate portions 6 and 8 of the pair of separators 1 and 2, and a first space 15 formed by the flat plate portions 6 and 8 and the inner wall of the cavity 25. It is divided into two spaces 31, 32.

注入ゲート２６は上型２２に形成され、注入ゲート２６と連通するフィルムゲート２７は、第一の空間１５の開口部１４に連通している。フィルムゲート２７は、平板部６、８と平行な方向から第一の空間１５にシール材を注入できるように形成されている。   The injection gate 26 is formed in the upper mold 22, and the film gate 27 communicating with the injection gate 26 communicates with the opening 14 of the first space 15. The film gate 27 is formed so that a sealing material can be injected into the first space 15 from a direction parallel to the flat plate portions 6 and 8.

一対のセパレータ１、２を成形型２１内に配置した後、注入ゲート２６からシール材を圧入する。これにより、シール材は、フィルムゲート２７を通りキャビティ２５の第一の空間１５内に流入する。このとき、シール材は、第一の空間１５内に平板部６、８に沿って流入するため、シール材の初期射出圧が平板部６、８の厚さ方向に直接作用することがない。したがって、セパレータ１、２の破損や変形を防止することができる。なお、フィルムゲート２７のゲート径を第一の空間１５の開口部１４の径と同等又はそれ以下に形成すれば、シール材の初期射出圧が、一対のセパレータ１、２の端面８ｃ、８ｃに直接作用するのを防止できるため、セパレータ１、２の破損や変形をさらに防止することができる。   After arranging the pair of separators 1 and 2 in the mold 21, a sealing material is press-fitted from the injection gate 26. As a result, the sealing material flows into the first space 15 of the cavity 25 through the film gate 27. At this time, since the sealing material flows into the first space 15 along the flat plate portions 6 and 8, the initial injection pressure of the sealing material does not directly act in the thickness direction of the flat plate portions 6 and 8. Therefore, breakage and deformation of the separators 1 and 2 can be prevented. If the gate diameter of the film gate 27 is formed to be equal to or smaller than the diameter of the opening 14 in the first space 15, the initial injection pressure of the sealing material is applied to the end faces 8c, 8c of the pair of separators 1, 2. Since direct action can be prevented, breakage and deformation of the separators 1 and 2 can be further prevented.

キャビティ２５の第一の空間１５内に流入し充填されたシール材は、平板部６、８に形成された連通孔６ａ、８ａを介して第二の空間３１、３２に流入し充填される。これにより、第一の空間１５に充填された第一のシール部材１６と、第二の空間３１、３２に充填された第二のシール部材１７、１８とが形成され、かつ第一のシール部材１６と第二のシール部材１７、１８とは、連通孔６ａ、８ａ中に充填されたシール部材を介して連続したシール部材１０を形成する。このように、シール部材１０は、一工程にて一対のセパレータ１、２の外縁に一体に成形される。   The sealing material that flows into and fills the first space 15 of the cavity 25 flows into and fills the second spaces 31 and 32 through the communication holes 6 a and 8 a formed in the flat plate portions 6 and 8. Thereby, the first seal member 16 filled in the first space 15 and the second seal members 17 and 18 filled in the second spaces 31 and 32 are formed, and the first seal member is formed. 16 and the second seal members 17 and 18 form a continuous seal member 10 through a seal member filled in the communication holes 6a and 8a. Thus, the seal member 10 is integrally formed on the outer edges of the pair of separators 1 and 2 in one step.

以上のように、連続したシール部材１０を一対のセパレータ１、２の外縁に形成することによって、一対のセパレータ１、２を一体化した燃料電池セパレータ１００を製造することができる。   As described above, the fuel cell separator 100 in which the pair of separators 1 and 2 are integrated can be manufactured by forming the continuous seal member 10 on the outer edges of the pair of separators 1 and 2.

なお、キャビティ２５内の第二の空間３１、３２に、突起成形部３１ａ、３２ａを形成することによって、第二のシール部材１７、１８に一対のセパレータ１、２と膜電極接合体３０とが当接した場合に圧縮変形されて膜電極接合体３０とセパレータ１、２との気密を保障する突起状シール部材１７ａ、１８ａを形成することができる。このように、突起成形部３１ａ、３２ａはシール材の注入位置から離れて形成されているため、シール部材成形後に発生する引け巣等の欠陥を防止することができ、良好なシール性を得ることができる。   In addition, by forming the projection forming portions 31 a and 32 a in the second spaces 31 and 32 in the cavity 25, the pair of separators 1 and 2 and the membrane electrode assembly 30 are provided on the second seal members 17 and 18. Protruding seal members 17a and 18a that are compressed and deformed to ensure airtightness between the membrane electrode assembly 30 and the separators 1 and 2 when contacted can be formed. As described above, since the projection forming portions 31a and 32a are formed away from the injection position of the sealing material, defects such as shrinkage nests generated after the sealing member molding can be prevented, and good sealing properties can be obtained. Can do.

以上の実施の形態１によれば、シール材は成形型２１のキャビティ２５内に平板部６、８に沿って注入されるため、シール材の初期射出圧が平板部６、８の厚さ方向に直接作用することがなく、セパレータの破損を防止することができる。   According to the first embodiment, since the sealing material is injected into the cavity 25 of the mold 21 along the flat plate portions 6 and 8, the initial injection pressure of the sealing material is the thickness direction of the flat plate portions 6 and 8. It is possible to prevent the separator from being damaged.

また、一対のセパレータ１、２の平板部６、８に連通孔６ａ、８ａを形成することによって、一対のセパレータ１、２に対して同時に、つまり一工程にてシール部材１０を成形することができ、かつそのシール部材１０を連続した形状に成形することができる。このように、実施の形態１によれば、一対のセパレータ１、２に対して別個にシール成形を行う必要がなく、かつそれぞれのセパレータ１、２を張り合わせる工程も必要ないため、製造に伴う工数及び製造コストを低減することができる。したがって、一対のセパレータ１、２を一体化した燃料電池セパレータ１００を簡便に製造することができる。   Further, by forming the communication holes 6a and 8a in the flat plate portions 6 and 8 of the pair of separators 1 and 2, the seal member 10 can be formed simultaneously with the pair of separators 1 and 2, that is, in one step. The sealing member 10 can be formed into a continuous shape. As described above, according to the first embodiment, it is not necessary to separately seal-mold the pair of separators 1 and 2, and there is no need to bond the separators 1 and 2. Man-hours and manufacturing costs can be reduced. Therefore, the fuel cell separator 100 in which the pair of separators 1 and 2 are integrated can be easily manufactured.

また、連続した形状のシール部材１０によって一体化された燃料電池セパレータ１００は高い剛性を有するため、ハンドリング特性に優れる。   Further, since the fuel cell separator 100 integrated by the continuous shape sealing member 10 has high rigidity, it has excellent handling characteristics.

さらに、シール部材１０は、燃料電池セパレータ１００の外縁に形成されるものであるため、燃料電池の反応面積を広くとることができる。   Furthermore, since the seal member 10 is formed on the outer edge of the fuel cell separator 100, the reaction area of the fuel cell can be increased.

（実施の形態２）
図５、図６を参照して、本発明の実施の形態２について説明する。図５は図１におけるＡ−Ａ断面の断面概略図であり、図６はシール部材を成形する方法を説明する図である。 (Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a schematic cross-sectional view taken along the line AA in FIG. 1, and FIG. 6 is a view for explaining a method of forming a seal member.

本実施の形態２に係る燃料電池セパレータ２００の構成は、上述の実施の形態１に係る燃料電池セパレータ１００と略同様であるため、相違点を中心に説明する。なお、同様の構成には燃料電池セパレータ１００と同一の符号を付し説明を省略する。   The configuration of the fuel cell separator 200 according to the second embodiment is substantially the same as that of the fuel cell separator 100 according to the first embodiment described above, and therefore the description will focus on the differences. In addition, the same code | symbol as the fuel cell separator 100 is attached | subjected to the same structure, and description is abbreviate | omitted.

本実施の形態２に係る燃料電池セパレータ２００と燃料電池セパレータ１００との相違点は、図５に示すように、燃料電池セパレータ２００は平板部６、８に連通孔を有さず、第一のシール部材１６と第二のシール部材１７、１８とは、平板部６、８の端面６ｃ、８ｃを覆う態様にて連続して形成される点である。   As shown in FIG. 5, the difference between the fuel cell separator 200 according to the second embodiment and the fuel cell separator 100 is that the fuel cell separator 200 does not have communication holes in the flat plate portions 6 and 8, and the first The seal member 16 and the second seal members 17 and 18 are points that are continuously formed in a manner covering the end faces 6c and 8c of the flat plate portions 6 and 8.

つまり、平板部６、８の端面６ｃ、８ｃは、シール部材１０から露出せずシール部材１０内に埋まった状態となっている。このように、シール部材１０を構成することによっても、第一のシール部材１６と第二のシール部材１７、１８とは連続したものとなるため、燃料電池セパレータ２００も一対のセパレータ１、２がシール部材１０によって一体化された構成となる。   That is, the end surfaces 6 c and 8 c of the flat plate portions 6 and 8 are not exposed from the seal member 10 and are embedded in the seal member 10. Thus, since the first seal member 16 and the second seal members 17 and 18 are continuous by configuring the seal member 10, the fuel cell separator 200 includes a pair of separators 1 and 2. The structure is integrated by the seal member 10.

この燃料電池セパレータ２００の製造方法を図６を参照して説明する。本実施の形態２では、一対のセパレータ１、２を、アノードガス流路３とカソードガス流路４とが外側になるように接触させて成形型２１内に配置した状態にて、一対のセパレータ１、２の平板部６、８の端面６ｃ、８ｃとキャビティ２５内壁との間には隙間３５が設けられる。   A method for manufacturing the fuel cell separator 200 will be described with reference to FIG. In the second embodiment, the pair of separators 1 and 2 are placed in the mold 21 so that the anode gas flow path 3 and the cathode gas flow path 4 are in contact with each other. A gap 35 is provided between the end surfaces 6 c and 8 c of the flat plate portions 6 and 8 and the inner wall of the cavity 25.

このため、キャビティ２５の第一の空間１５内に流入し充填されたシール材は、隙間３５を介して第二の空間３１、３２に流入し充填される。これにより、第一の空間１５に充填された第一のシール部材１６と、第二の空間３１、３２に充填された第二のシール部材１７、１８とが形成され、かつ第一のシール部材１６と第二のシール部材１７、１８とは、隙間３５中に充填されたシール部材を介して連続したシール部材１０を形成する。このように、シール部材０は、一工程にて一対のセパレータ１、２の外縁に一体に成形される。   For this reason, the sealing material that has flowed into and filled in the first space 15 of the cavity 25 flows into the second spaces 31 and 32 through the gap 35 and is filled. Thereby, the first seal member 16 filled in the first space 15 and the second seal members 17 and 18 filled in the second spaces 31 and 32 are formed, and the first seal member is formed. 16 and the second seal members 17 and 18 form a continuous seal member 10 via a seal member filled in the gap 35. Thus, the seal member 0 is integrally formed on the outer edges of the pair of separators 1 and 2 in one step.

以上のように、本実施の形態２においても、連続したシール部材１０を一対のセパレータ１、２の外縁に形成することができ、一対のセパレータ１、２を一体化した燃料電池セパレータ２００を製造することができる。したがって、本実施の形態２においても、実施の形態１と同様の作用効果を奏する。   As described above, also in the second embodiment, the continuous seal member 10 can be formed on the outer edges of the pair of separators 1 and 2, and the fuel cell separator 200 in which the pair of separators 1 and 2 are integrated is manufactured. can do. Therefore, the second embodiment also has the same effects as the first embodiment.

（実施の形態３）
図７〜図１１を参照して、本発明の実施の形態３について説明する。図７は本実施の形態３に係る燃料電池セパレータ３００の平面概略図であり、図８は図７におけるＡ−Ａ断面の断面概略図であり、図９は図７におけるＢ−Ｂ断面の断面概略図である。また、図１０、図１１は実施の形態３に対する比較例を示す図であり、それぞれ図８、９に対応する図である。なお、図７では、本発明の実施の形態３の特徴部分を部分断面図Ｃとして示した。 (Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. 7 is a schematic plan view of a fuel cell separator 300 according to Embodiment 3, FIG. 8 is a schematic cross-sectional view taken along line AA in FIG. 7, and FIG. 9 is a cross-sectional view taken along line BB in FIG. FIG. FIGS. 10 and 11 are diagrams showing comparative examples with respect to the third embodiment, and correspond to FIGS. 8 and 9, respectively. In FIG. 7, the characteristic part of the third embodiment of the present invention is shown as a partial cross-sectional view C.

本実施の形態３に係る燃料電池セパレータ３００の構成は、上述の実施の形態１に係る燃料電池セパレータ１００と略同様であるため、相違点を中心に説明する。なお、同様の構成には燃料電池セパレータ１００と同一の符号を付し説明を省略する。   The configuration of the fuel cell separator 300 according to Embodiment 3 is substantially the same as that of the fuel cell separator 100 according to Embodiment 1 described above, and therefore, differences will be mainly described. In addition, the same code | symbol as the fuel cell separator 100 is attached | subjected to the same structure, and description is abbreviate | omitted.

本実施の形態３に係る燃料電池セパレータ３００と燃料電池セパレータ１００との相違点は、図７〜９に示すように、燃料電池セパレータ３００は第一のシール部材１６内に、一対のセパレータ１、２の少なくとも一方が他方に当接する突起部３７が複数形成されている点である。   The difference between the fuel cell separator 300 according to the third embodiment and the fuel cell separator 100 is that, as shown in FIGS. 7 to 9, the fuel cell separator 300 is provided in the first seal member 16 with a pair of separators 1, 2 is that a plurality of protrusions 37 in which at least one of the two contacts the other is formed.

突起部３７は、一対のセパレータ１、２のいずれか一方を他方に当接するように曲げ加工することによって成形され、所定の間隔にて設けられる。   The protrusions 37 are formed by bending one of the pair of separators 1 and 2 so as to contact the other, and are provided at predetermined intervals.

シール材のキャビティ２５内への注入は、突起部３７の間の領域３８にフィルムゲート２７を設けることによって行われる。したがって、実施の形態１のように平板部６、８に連通孔６ａ、８ａを設ける場合には、連通孔６ａ、８ａは、図７及び図９に示すように突起部３７の間の領域３８に設けられる。なお、図７における部分断面図Ｃにおいて、突起部３７と連通孔６ａとは同一断面には存在しないが、突起部３７と連通孔６ａとの位置関係を示すために便宜上同一断面内に図示した。   Injection of the sealing material into the cavity 25 is performed by providing a film gate 27 in a region 38 between the protrusions 37. Therefore, when the communication holes 6a and 8a are provided in the flat plate portions 6 and 8 as in the first embodiment, the communication holes 6a and 8a are formed in the region 38 between the protrusions 37 as shown in FIGS. Provided. In the partial cross-sectional view C in FIG. 7, the protrusion 37 and the communication hole 6a do not exist in the same cross section, but are shown in the same cross section for convenience to show the positional relationship between the protrusion 37 and the communication hole 6a. .

突起部を有さないセパレータの場合、図１０、図１１に示すように、シール部材１０成形後にシール部材１０が収縮した場合、セパレータ１、２もそれに伴い変形する可能性がある。しかし、本実施の形態３によれば、一体化される一対のセパレータ１、２のうち少なくとも一方には他方に当接する突起部が形成されるため、シール部材１０成形後にシール部材１０が収縮した場合でも、セパレータ１、２の変形を抑制することができる。   In the case of a separator having no protrusion, as shown in FIGS. 10 and 11, when the seal member 10 contracts after the seal member 10 is formed, the separators 1 and 2 may be deformed accordingly. However, according to the third embodiment, since at least one of the pair of integrated separators 1 and 2 is formed with a protrusion that contacts the other, the seal member 10 contracts after the seal member 10 is formed. Even in this case, the deformation of the separators 1 and 2 can be suppressed.

本発明は上記の実施の形態に限定されずに、その技術的な思想の範囲内において種々の変更がなしうることは明白である。   The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

本発明は、燃料電池に用いられるセパレータの製造に適用することができる。   The present invention can be applied to manufacture of a separator used in a fuel cell.

本発明に係る製造方法によって得られた燃料電池セパレータの平面概略図である。It is the plane schematic diagram of the fuel cell separator obtained by the manufacturing method concerning the present invention. 本発明の実施の形態１に係る燃料電池セパレータ１００の図１におけるＡ−Ａ断面の断面概略図である。It is the cross-sectional schematic of the AA cross section in FIG. 1 of the fuel cell separator 100 which concerns on Embodiment 1 of this invention. 同じく燃料電池セパレータ１００を用いた燃料電池の模式図である。2 is a schematic diagram of a fuel cell using the fuel cell separator 100 in the same manner. FIG. 同じく燃料電池セパレータ１００に係る製造方法を説明する図である。It is a figure explaining the manufacturing method concerning fuel cell separator 100 similarly. 本発明の実施の形態２に係る燃料電池セパレータ２００の図１におけるＡ−Ａ断面の断面概略図である。It is the cross-sectional schematic of the AA cross section in FIG. 1 of the fuel cell separator 200 which concerns on Embodiment 2 of this invention. 同じく燃料電池セパレータ２００に係る製造方法を説明する図である。It is a figure explaining the manufacturing method which similarly concerns on the fuel cell separator. 本発明の実施の形態３に係る燃料電池セパレータ３００の平面概略図である。FIG. 6 is a schematic plan view of a fuel cell separator 300 according to Embodiment 3 of the present invention. 本発明の実施の形態３に係る燃料電池セパレータ３００の図７におけるＡ−Ａ断面の断面概略図である。It is the cross-sectional schematic of the AA cross section in FIG. 7 of the fuel cell separator 300 which concerns on Embodiment 3 of this invention. 本発明の実施の形態３に係る燃料電池セパレータ３００の図７におけるＢ−Ｂ断面の断面概略図である。FIG. 8 is a schematic cross-sectional view taken along line BB in FIG. 7 of a fuel cell separator 300 according to Embodiment 3 of the present invention. 本発明の実施の形態３に対する比較例を示す図である。It is a figure which shows the comparative example with respect to Embodiment 3 of this invention. 本発明の実施の形態３に対する比較例を示す図である。It is a figure which shows the comparative example with respect to Embodiment 3 of this invention.

符号の説明Explanation of symbols

１００、２００、３００ 燃料電池セパレータ
１ アノード側セパレータ
２ カソード側セパレータ
３ アノードガス流路３
４ カソードガス流路
５，７ 波状部
６，８ 平板部
６ａ，８ａ 連通孔
６ｃ，８ｃ 平板部の端面
１０ シール部材
１１ 山部
１２ 谷部
１３ 冷却水流路
１５ 第一の空間
１６ 第一のシール部材
１７，１８ 第二のシール部材
１７ａ、１８ａ 突起状シール部材
２１ 成形型
２５ キャビティ
２６ 注入ゲート
２７ フィルムゲート
３１，３２ 第二の空間
３５ 隙間
３７ 突起部 100, 200, 300 Fuel cell separator 1 Anode side separator 2 Cathode side separator 3 Anode gas flow path 3
4 Cathode gas flow path 5, 7 Wave-like part 6, 8 Flat plate part 6 a, 8 a Communication hole 6 c, 8 c End face 10 of flat plate part Seal member 11 Mountain part 12 Valley part 13 Cooling water flow path 15 First space 16 First seal Members 17, 18 Second seal members 17a, 18a Protruding seal member 21 Mold 25 Cavity 26 Injection gate 27 Film gate 31, 32 Second space 35 Clearance 37 Projection

Claims (13)

一方の面にアノードガス流路を有すると共に他方の面にカソードガス流路を有し、それぞれの面が電解質膜に電極を配置してなる膜電極接合体に当接する燃料電池セパレータの製造方法であって、
アノード側とカソード側との一対のセパレータをそれぞれのガス流路が外側となるように接触させて成形型内に配置し、
前記成形型に設けられたゲートを通じて前記一対のセパレータの外縁部に沿ってシール材を注入し、
前記シール材は、前記一対のセパレータの外縁部に挟まれて形成される第一の空間に充填されると共に、前記一対のセパレータの外縁部と前記成形型とで形成される第二の空間に充填され、
前記双方の空間に充填されたシール材が連続したシール部材を構成することによって前記一対のセパレータが一体化されてなることを特徴とする燃料電池セパレータの製造方法。 A method of manufacturing a fuel cell separator having an anode gas channel on one side and a cathode gas channel on the other side, each side contacting a membrane electrode assembly in which electrodes are arranged on an electrolyte membrane. There,
A pair of separators on the anode side and cathode side are placed in the mold so that the respective gas flow paths are on the outside,
Injecting a sealant along the outer edge of the pair of separators through a gate provided in the mold,
The sealing material is filled in a first space formed by being sandwiched between outer edges of the pair of separators, and in a second space formed by the outer edges of the pair of separators and the mold. Filled
A method of manufacturing a fuel cell separator, wherein the pair of separators are integrated by forming a sealing member in which the sealing material filled in both the spaces is continuous. 前記外縁部は、波状のガス流路の外縁に平板状に形成されることを特徴とする請求項１に記載の燃料電池セパレータ。   2. The fuel cell separator according to claim 1, wherein the outer edge portion is formed in a flat plate shape on an outer edge of the wave-like gas flow path. 前記一対のセパレータの外縁部には、前記第一の空間と前記第二の空間とを連通する連通孔が形成され、
前記シール材は、前記第一の空間に充填されると共に、前記連通孔を通じて前記第二の空間に充填されることによって連続したシール部材を構成することを特徴とする請求項１又は請求項２に記載の燃料電池セパレータの製造方法。 A communication hole that connects the first space and the second space is formed in the outer edge portion of the pair of separators,
The said sealing material comprises the continuous sealing member by being filled with said 2nd space through the said communicating hole while being filled with said 1st space. A method for producing a fuel cell separator as described in 1. above. 前記一対のセパレータが前記成形型内に配置された状態にて、前記一対のセパレータの外縁部の端面と前記成形型との間には隙間が設けられ、
前記シール材は、前記第一の空間に充填されると共に、前記隙間を通じて前記第二の空間に充填されることによって連続したシール部材を構成することを特徴とする請求項１又は請求項２に記載の燃料電池セパレータの製造方法。 In a state where the pair of separators are disposed in the mold, a gap is provided between the end surfaces of the outer edge portions of the pair of separators and the mold.
The said sealing material comprises the continuous sealing member by being filled with the said 2nd space through the said clearance gap while filling the said 1st space. The manufacturing method of the fuel cell separator of description. 前記第一の空間に充填されたシール材内に、前記一対のセパレータの少なくとも一方が他方に当接する突起部が複数形成されることを特徴とする請求項１から請求項４のいずれか一項に記載の燃料電池セパレータの製造方法。   5. The projecting portion according to claim 1, wherein a plurality of protrusions in which at least one of the pair of separators contacts the other are formed in the sealing material filled in the first space. A method for producing a fuel cell separator as described in 1. above. 前記シール材の注入は、前記複数の突起の間から行われることを特徴とする請求項５に記載の燃料電池セパレータの製造方法。   The method for manufacturing a fuel cell separator according to claim 5, wherein the injection of the sealing material is performed between the plurality of protrusions. 前記第二の空間に充填されたシール材は、前記一対のセパレータと前記膜電極接合体とが当接した場合に圧縮変形されて前記膜電極接合体と前記セパレータとの気密を保障する突起状のシール部材を形成することを特徴とする請求項１から請求項６のいずれか一項に記載の燃料電池セパレータの製造方法。   The sealing material filled in the second space is a projecting shape that is compressed and deformed when the pair of separators and the membrane electrode assembly are in contact with each other to ensure airtightness between the membrane electrode assembly and the separator. The method for producing a fuel cell separator according to claim 1, wherein a sealing member is formed. 一方の面にアノードガス流路を有すると共に他方の面にカソードガス流路を有し、それぞれの面が電解質膜に電極を配置してなる膜電極接合体に当接する燃料電池セパレータであって、
アノード側とカソード側との一対のセパレータと、
前記一対のセパレータをそれぞれのガス流路が外側となるように接触させて配置した状態にて当該一対のセパレータの外縁に形成されたシール部材とを備え、
前記シール部材は、前記一対のセパレータの外縁部に挟まれて形成された第一のシール部材と、前記外縁部における前記膜電極接合体に対向する面に形成された第二のシール部材とを備え、前記第一のシール部材と前記第二のシール部材とが連続して形成されることによって、前記一対のセパレータが一体化されてなることを特徴とする燃料電池セパレータ。 A fuel cell separator having an anode gas channel on one side and a cathode gas channel on the other side, each side contacting a membrane electrode assembly in which electrodes are arranged on an electrolyte membrane,
A pair of separators on the anode side and the cathode side;
A seal member formed on the outer edge of the pair of separators in a state where the pair of separators are arranged in contact with each other so that the gas flow paths are on the outside;
The seal member includes a first seal member formed between outer edges of the pair of separators, and a second seal member formed on a surface of the outer edge facing the membrane electrode assembly. The fuel cell separator is characterized in that the pair of separators are integrated by forming the first seal member and the second seal member continuously. 前記外縁部は、波状のガス流路の外縁に平板状に形成されることを特徴とする請求項８に記載の燃料電池セパレータ。   The fuel cell separator according to claim 8, wherein the outer edge portion is formed in a flat plate shape on the outer edge of the wave-like gas flow path. 前記一対のセパレータの外縁部には、前記第一の空間と前記第二の空間とを連通する連通孔が形成され、
前記第一のシール部材と前記第二のシール部材とは、前記連通孔を通じて連続して形成されてなることを特徴とする請求項８又は請求項９に記載の燃料電池セパレータ。 A communication hole that connects the first space and the second space is formed in the outer edge portion of the pair of separators,
The fuel cell separator according to claim 8 or 9, wherein the first seal member and the second seal member are formed continuously through the communication hole. 前記第一のシール部材と前記第二のシール部材とは、前記一対のセパレータの外縁部の端面を覆う態様にて連続して形成されてなることを特徴とする請求項８又は請求項９に記載の燃料電池セパレータ。   The said 1st sealing member and said 2nd sealing member are continuously formed in the aspect which covers the end surface of the outer edge part of said pair of separator, The Claim 8 or Claim 9 characterized by the above-mentioned. The fuel cell separator as described. 前記第一のシール部材内に、前記一対のセパレータの少なくとも一方が他方に当接する突起部が複数形成されてなることを特徴とする請求項８から請求項１１のいずれか一項に記載の燃料電池セパレータ。   The fuel according to any one of claims 8 to 11, wherein a plurality of protrusions in which at least one of the pair of separators abuts the other are formed in the first seal member. Battery separator. 前記第二のシール部材に、前記一対のセパレータと前記膜電極接合体とが当接した場合に圧縮変形されて前記膜電極接合体と前記セパレータとの気密を保障する突起状シール部材が形成されてなることを特徴とする請求項８から請求項１２のいずれか一項に記載の燃料電池セパレータ。   When the pair of separators and the membrane electrode assembly are in contact with the second seal member, a projecting seal member is formed that is compressed and deformed to ensure airtightness between the membrane electrode assembly and the separator. The fuel cell separator according to claim 8, wherein the fuel cell separator is a fuel cell separator.
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