JPH08222237A - The fuel cell separator - Google Patents

The fuel cell separator

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Publication number
JPH08222237A
JPH08222237A JP4788695A JP4788695A JPH08222237A JP H08222237 A JPH08222237 A JP H08222237A JP 4788695 A JP4788695 A JP 4788695A JP 4788695 A JP4788695 A JP 4788695A JP H08222237 A JPH08222237 A JP H08222237A
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Prior art keywords
fuel cell
separator
fuel
formed
gas
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Pending
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JP4788695A
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Japanese (ja)
Inventor
Takeshi Hara
Yasuko Shimizu
毅 原
泰子 清水
Original Assignee
Aisin Aw Co Ltd
Aqueous Res:Kk
アイシン・エィ・ダブリュ株式会社
株式会社エクォス・リサーチ
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204Non-porous and characterised by the material
    • H01M8/0223Composites
    • H01M8/0228Composites in the form of layered or coated products
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204Non-porous and characterised by the material
    • H01M8/0206Metals or alloys
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H01M8/0254Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/24Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/24Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2457Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised

Abstract

PURPOSE: To provide a new structure of a separator for a fuel cell whose cost is reduced and which is excellent in productivity and whose safety is enhanced and which is excellent in supply efficiency of reaction gas. CONSTITUTION: In a fuel cell stack formed by layering a plurality of cells 10 where electrodes 12 are arranged on both sides of solid electrolyte 11, it is used by being interposed between these cells. The obverse and the reverse of a metallic material excellent in workability are coated with a material excellent in electric conductivity, and a large number of projections 21 and 22 are arranged at proper intervals on these obverse and reverse. The projections are arranged so as to contact with cell surfaces of the fuel cell in the fuel cell stack. A space area 38 communicated and formed between the projections 21 between one side surface of a separator and the cells of the fuel cell becomes a fuel gas passing groove, and a space area communicated and formed between the projections 22 between the other side surface of the separator and the cells of the fuel cell becomes an oxidating agent gas passage groove.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は燃料電池用セパレータの構造に関する。 The present invention relates to a structure of a fuel cell separator.

【0002】 [0002]

【従来の技術】燃料電池は、使用される電解質の種類により、固体高分子電解質型、リン酸型、溶融炭酸塩型、 BACKGROUND ART Fuel cells, the type of electrolyte used, the solid polymer electrolyte type, a phosphoric acid type, molten carbonate type,
固体酸化物型等の各種が知られている。 The solid oxide of various are known. このうち固体高分子電解質型燃料電池は、分子中にプロトン交換基を有する高分子樹脂膜を飽和に含水させるとプロトン伝導性電解質として機能することを利用した燃料電池であって、比較的低温度域で作動し、発電効率も優れているため、電気自動車搭載用を初めとして各種の用途が見込まれている。 Among solid polymer electrolyte fuel cell is a fuel cell utilizing the function as when the hydrated to saturate the polymer resin film proton conducting electrolyte having a proton exchange group in the molecule, a relatively low temperature operating at frequency, since the excellent power generation efficiency, various applications are expected to electric vehicle mounted as initially.

【0003】固体高分子電解質型燃料電池スタックは、 [0003] The solid polymer electrolyte fuel cell stack,
固体高分子電解質膜の両面にガス拡散電極をホットプレス等の手段により接合してなる燃料電池セル(単セル) Polymer gas diffusion electrodes on both surfaces of an electrolyte membrane formed by bonding by means of hot press or the like the fuel cell (single cell)
と、カーボンや金属製のガスセパレータとを積層した構造を有する(たとえば特開平6−119928号公報参照)。 When having a stacked structure of a gas separator made of carbon or metal (for example, see JP-A-6-119928).

【0004】ガス拡散電極は、電解質膜に接する側に配される触媒活物質を含む触媒層と、この触媒層を支持すると共に反応ガス(燃料ガス、酸化剤ガス)を供給および排出し、さらに集電体としての機能をも有する多孔質のガス拡散層とからなり、一方のガス拡散電極は燃料ガス(たとえば水素ガスまたは水素を高濃度に含むガス) [0004] Gas diffusion electrode, a catalyst layer containing a catalyst active material disposed on the side in contact with the electrolyte membrane, the reaction gas (fuel gas, oxidant gas) to support the catalyst layer was supplied and discharged, further It consists of a porous gas diffusion layer which also functions as a current collector, one of the gas diffusion electrode is a fuel gas (e.g. gas containing hydrogen gas or hydrogen in a high concentration)
の供給を受ける燃料電極(アノード極)となり、他方のガス拡散電極は酸化剤ガス(たとえば空気)の供給を受ける酸化剤電極(カソード極)となる。 The fuel electrode (anode), and the other gas diffusion electrode supplied with the oxidizer electrode supplied with the oxidizer gas (e.g., air) (cathode).

【0005】このような従来技術による2セルの燃料電池スタックの構成例が図5〜図7に示される。 [0005] configuration of a fuel cell stack 2 cells such prior art is shown in FIGS. 5-7.

【0006】単セル10は、上記のように、電解質膜1 [0006] Single cell 10, as described above, the electrolyte membrane 1
1の両面にガス拡散電極12が接合されてなる。 Gas diffusion electrode 12 is joined to both sides of the 1.

【0007】セパレータは、表裏面にそれぞれ多数の凹溝2、3が互いに直交方向に形成されたガス不透過性材料(たとえば緻密カーボングラファイト)よりなるセパレータ板1が、フェノール樹脂等の樹脂絶縁材料よりなるセパレータ枠4の内部に収納された状態で支持されて構成されている。 [0007] separator, the separator plate 1 made of each number of grooves 2 and 3 with each other is formed in the direction perpendicular gas impermeable material on the front and back surfaces (e.g. dense carbon graphite) is, and phenol resin resin insulating material is configured by being supported in a state of being housed in the more becomes the separator frame 4. セパレータ枠4にはガスマニホールドを収容するためのマニホールド装填口5a〜5dが開口形成される。 The separator frame 4 manifold mounting slot 5a~5d for accommodating the gas manifold is opened and formed.

【0008】このようなセパレータと単セル10とを積層してなる燃料電池スタックにおいて、マニホールド装填口5aに装填されるガスマニホールド(図示せず)には燃料ガスが導入され、セパレータ枠4の内枠部8aの内部に形成される流路孔6aを介して、セパレータ板1 [0008] In a fuel cell stack formed by laminating a such separator and single cell 10, the fuel gas is introduced into the gas manifold is mounted to the manifold loading opening 5a (not shown), of the separator frame 4 through the passage hole 6a formed inside the frame portion 8a, the separator plate 1
とセパレータ枠4との間の上方空間領域7aに導入され、セパレータ板1の表面側の凹溝2を図6において左方向に流動する。 And it is introduced into the upper space region 7a between the separator frame 4, to flow to the left of the grooves 2 on the surface side of the separator plate 1 in FIG. そして、内枠部8aに対向する内枠部8cの内部に形成される流路孔(図示せず)を介して、 Then, through a passage hole formed in the interior of the inner frame portion 8c which faces the inner frame portion 8a (not shown),
マニホールド装填口5bに装填される燃料ガス排出マニホールド(図示せず)に排出される。 It is discharged into the fuel gas discharge manifold to be loaded into the manifold loading opening 5b (not shown).

【0009】酸化剤ガスの流れについても略同様であり、ガスマニホールド部5cに導入された酸化剤ガスは、セパレータ枠4の内枠部8cの内部に形成される流路孔6bを介して、セパレータ板1とセパレータ枠4との間の下方空間領域7bに導入され、セパレータ板1の裏面側の凹溝3を図7において左方向に流動した後、セパレータ枠4の内枠部8dの内部に形成される流路孔(図示せず)を介して、マニホールド装填口5dに装填される酸化剤ガス排出マニホールド(図示せず)に排出される。 [0009] is substantially same for the flow of oxidant gas, the oxidant gas introduced into the gas manifold section 5c through the passage hole 6b formed inside of the inner frame portion 8c of the separator frame 4, is introduced into the lower space region 7b between the separator plate 1 and the separator frame 4, after flowing in the left direction grooves 3 on the back side of the separator plate 1 in FIG. 7, the interior of the inner frame portion 8d of the separator frame 4 through the passage hole formed (not shown) to be discharged into the oxidizing gas discharge manifold to be loaded into the manifold loading opening 5d (not shown).

【0010】 [0010]

【発明が解決しようとする課題】図5〜図7に示されるような従来のセパレータにおいては、ガス流路溝となる多数の凹溝2、3をその表裏面に形成しなければならないが、セパレータ材料の緻密カーボングラファイトの硬度がきわめて高いため、ダイヤモンドバイト等の切削工具を用いても切削加工が容易ではなく、量産が困難であるという問題があった。 In conventional separators, such as shown in FIGS. 5 to 7 [0008], it is necessary to form a number of grooves 2, 3 which is a gas flow passage to the front and back surfaces, the hardness of the dense carbon graphite separator material is extremely high, cutting even using a cutting tool such as a diamond tool is not easy, there is a problem that mass production is difficult.

【0011】また、特に酸化剤極においては、電池反応による生成水を効率良く排出する必要があるが、従来のセパレータのガス流路溝は平行な複数の溝であり、生成水が滞留しがちで排出効率に欠けていた。 Further, particularly in the oxidizing agent electrode, it is necessary to efficiently discharge the water produced by the cell reaction, a gas flow path groove of the conventional separator is a plurality of parallel grooves, often generated water stagnates in was lacking in emission efficiency. 生成水の排出効率が悪いと、電極が電解質膜から剥離する原因となり、反応ガスが電極上の触媒と反応して電極端部において発火するというトラブルを生じる危険性が潜在していた。 When the discharge efficiency of the generated water is poor, causing the electrode is peeled from the electrolyte membrane, the reactive gas is a risk of causing trouble that fires in the catalytic reaction to the electrode end on the electrode had potential.

【0012】 [0012]

【課題を解決するための手段】そこで本発明は上記した従来技術の問題点を解消し、低コストで生産性が良好であり、安全性が高く、しかも反応ガスの供給能率に優れた新規な燃料電池用セパレータの構造を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention solves the problems of the prior art described above, has good productivity at a low cost, high safety, yet novel with excellent efficiency for supplying the reaction gas and an object thereof is to provide a structure of a fuel cell separator.

【0013】また、本発明は、併せて、セパレータを小型化し、もって燃料電池スタックの小型軽量化を達成することを目的とする。 Further, the present invention, taken together, the separator is downsized, and thereby to achieve a reduction in size and weight of the fuel cell stack.

【0014】これらの目的を達成するため、本発明は、 [0014] In order to achieve these objects, the present invention is,
固体電解質の両側に電極を配した燃料電池セルが複数積層されてなる燃料電池スタックにおいて前記燃料電池セルの間に介挿されて用いられ、一方の側面には隣接する一方の燃料電池セルに燃料ガスを供給するための燃料ガス流路溝を備えると共に、他方の側面には隣接する他方の燃料電池セルに酸化剤ガスを供給するための酸化剤ガス流路溝を備えた燃料電池用セパレータであって、加工性に優れた金属材料の表裏面に電気伝導性に優れた材料がコーティングされ、かつ、その表裏面にはそれぞれ多数の突起が適当な間隔を配して設けられ、前記突起は前記燃料電池スタックにおいて前記燃料電池セル面に接するように設けられてなり、前記燃料ガス流路溝および前記酸化剤ガス流路溝が、それぞれ、前記セパレータと前記燃料電池セルと Fuel cells which arranged electrodes on both sides of a solid electrolyte is used interposed between the fuel cells in a fuel cell stack formed by stacking a plurality fuel to adjacent one of the fuel cell on one side provided with a fuel gas flow grooves for supplying a gas, on the other side in a fuel cell separator having an oxidant gas flow grooves for supplying an oxidant gas to the other adjacent fuel cell there, a material excellent in electrical conductivity is coated on front and back surfaces of the metal material having excellent workability, and the table on the back a number of respective projections provided by arranging appropriate intervals, the projections wherein it is provided so as to be in contact with the fuel cell surface in the fuel cell stack, the fuel gas flow grooves and the oxidant gas flow passage grooves, respectively, and the separator and the fuel cell 間において前記突起間に連通形成されることを特徴とする。 Characterized in that it is communicating formed between the projection between.

【0015】 [0015]

【作用】セパレータに開口形成される燃料ガス供給用ガスマニホールド装填口に装填されるガスマニホールドから供給される燃料ガスは、セパレータの一方の側において、セパレータと燃料電池セルとの間においてセパレータ面の突起間に連通形成される燃料ガス流路溝を通って、セパレータの反対側に同様に開口形成燃料ガス排出用ガスマニホールド装填口に装填されるガスマニホールド内に排出される。 [Action] fuel gas supplied from a gas manifold to be loaded into the fuel gas supply gas manifold loading port which is opened and formed in the separator is, on one side of the separator, the separator surface between the separator and the fuel cell through the fuel gas flow passage groove is communicated formed between the projections, and is discharged into the gas manifold to be loaded in the same manner as the opening formed fuel gas discharge gas manifold mounting slot on the opposite side of the separator. 酸化剤ガスは、セパレータの他方の側において、同様にして、酸化剤供給ガスマニホールドから、セパレータ面の突起間に連通形成される酸化剤ガス流路溝を通って、酸化剤排出ガスマニホールド内に排出される。 Oxidant gas, on the side the other separator, Similarly, the oxidant supply gas manifold, through the oxidant gas flow passage grooves formed communicating between the separator surface protrusions, the oxidant exhaust gas manifold It is discharged.

【0016】 [0016]

【実施例】以下図1ないし図4を参照して本発明の一実施例による燃料電池用セパレータの構成を説明する。 EXAMPLES below with reference to FIGS. 1 to 4 illustrating a configuration of a fuel cell separator according to an embodiment of the present invention.

【0017】このセパレータは、セパレータ板20と、 [0017] This separator, the separator plate 20,
フェノール樹脂等の樹脂絶縁材料よりなる一対のセパレータ枠部材30aおよび30bを接合してなるセパレータ枠30とから構成される。 Composed of the separator frame 30 for formed by joining a pair of separators frame members 30a and 30b made of an insulating resin material such as phenol resin. セパレータ板20は、セパレータ枠部材30aおよび30bの間に挟持固定される。 Separator plate 20 is sandwiched and fixed between the separator frame members 30a and 30b.

【0018】図1を参照して、セパレータ板20は、エンボス加工ないしディンプル加工が容易な金属材料、より具体的にはSUS、冷間圧延材、Al等を基材とし、 [0018] Referring to FIG. 1, the separator plate 20 is embossed or dimpled easy metallic material, more specifically SUS, cold rolled material, the base material of Al or the like,
その表裏面に電気伝導性が良好なガス不透過性材料、たとえば緻密カーボングラファイトを含浸、溶射、電着、 Good gas impermeable material electrically conductive at its front and rear surfaces, for example, impregnated with dense carbon graphite, thermal spraying, electrodeposition,
スパッタリング等の適宜手法によりコーティングし、これにエンボス加工ないしディンプル加工を施してその表裏面に数ミリ間隔で多数の突起21、22を形成したものである。 Coated with an appropriate technique such as sputtering, and forming a plurality of projections 21, 22 in several millimeters intervals on the front and back this embossed or dimpled. 突起21、22の頂上までの高さは、燃料電池スタックを構成したときに、突起の頂上が燃料電池単セル10に密接するように設定されている(図3)。 Summit to the height of the protrusions 21 and 22, when a fuel cell stack, is set as the top of the projection is in close contact with the unit cell 10 (FIG. 3).

【0019】なお、ガス不透過性材料を基板表裏面にコーティングした後にエンボス加工ないしディンプル加工を施しても良く、反対に、基板表裏面にエンボス加工ないしディンプル加工を施して突起21、22を形成した後にガス不透過性材料のコーティングを行っても良い。 [0019] The formation may be embossed or dimpled after coating the gas impermeable material on the rear surface of the substrate table, on the contrary, the projections 21 and 22 embossed or dimpled on the rear surface of the substrate table it may be carried out a coating of gas impermeable material after.

【0020】突起21、22が形成された領域の外側四周にはそれぞれガスマニホールドを装填するためのマニホールド装填口23が貫通形成される。 The manifold mounting slot 23 for each of the outer four sides of the area protrusions 21 and 22 are formed mounting a gas manifold is formed through. また、四角にはスタック固定用のボルトまたはタイロッドを貫通させるための貫通孔24が貫通形成される。 The through hole 24 for passing bolts or tie rods for stack fixed in a square is formed through.

【0021】セパレータ枠30は、同一構成のセパレータ枠部材30aおよび30bを接合することによって形成される。 [0021] The separator frame 30 is formed by joining the separator frame member 30a and 30b of the same configuration. 各々の接合部分にはあらかじめシール剤が塗布される。 The joint portion of each pre-sealing agent is applied.

【0022】セパレータ枠部材30a(30b)の構成が図2に示されている。 The structure of the separator frame member 30a (30b) is shown in FIG. セパレータ枠部材30aの中央には開口31が貫通形成される。 In the center of the separator frame member 30a opening 31 is formed through. 中央開口31の外側四周にはそれぞれガスマニホールドを装填するためのマニホールド装填口32が貫通形成され、四角にはスタック固定用のボルトまたはタイロッドを貫通させるための貫通孔33が形成される。 Central manifold mounting slot 32 for each of the outer four sides for loading gas manifold aperture 31 is formed through, the square through hole 33 for passing bolts or tie rods for stack fixed is formed. これらは、セパレータ板20におけるマニホールド装填口23、貫通孔24とそれぞれ整列するように設けられている。 These are provided to align the manifold loading aperture 23 in the separator plate 20, the through hole 24, respectively.

【0023】セパレータ枠部材30aの下面側において、多数のガス流路孔34が対向して設けられる。 [0023] In the lower surface side of the separator frame member 30a, a plurality of gas flow path hole 34 provided opposite. これらガス流路孔34は、その両端において、マニホールド装填口32、32および中央開口31にそれぞれ開口している。 These gas passage holes 34, at its ends, each of which opens into a manifold mounting slot 32, 32 and central opening 31.

【0024】上記のように構成されたセパレータ枠部材30aおよび30bを、90度向きを変えて直交状態として、それぞれ図2に示される上面を向かい合わせにし、これらセパレータ枠部材30aおよび30bの間にセパレータ板20を挟んで互いに接合させることによって、本実施例のセパレータが構成される。 [0024] The constructed separator frame members 30a and 30b as described above, as an orthogonal state by changing the 90-degree direction, respectively facing each other the top surface as shown in Figure 2, between which the separator frame members 30a and 30b by joining each other across the separator plate 20, the separator is configured in this embodiment.

【0025】このようなセパレータを用いて、2つの単セル10、10をそれぞれセパレータ間に挟持して2セルの燃料電池スタックを構成した場合の一方向の断面図が図3に示される。 [0025] Using such a separator, one-way cross-sectional view of a case where two unit cells 10 and 10 were respectively a fuel cell stack sandwiched by two cells between the separators is shown in FIG. 各燃料電池単セル10は、固体高分子電解質膜11の両面にガス拡散電極12、12をホットプレス等の手段により接合してなる。 Each unit cell 10 is formed by joining the gas diffusion electrode 12, 12 by means of a hot press or the like to the surfaces of the solid polymer electrolyte membrane 11. 各セパレータ間において、燃料電池単セル10における電解質膜11の端部は、セパレータ枠部材30aおよび30bの間に挟持され、エポキシ樹脂等の熱硬化性樹脂によるシール剤36により接着固定されている。 Between the separators, end of the electrolyte membrane 11 in the unit cell 10 is sandwiched between the separator frame members 30a and 30b, they are bonded by sealants 36 of thermosetting resin such as epoxy resin.

【0026】図3において符号37は、燃料ガス導入マニホールド(図示せず)のための装填領域を示し、セパレータ板20およびセパレータ枠部材30a、30bに形成された各マニホールド装填口23、32の各一つが整列して該マニホールド装填領域37をなしている。 The reference numeral 37 in FIG. 3 shows the loading area for the fuel gas inlet manifold (not shown), each of the manifolds loading slot 23, 32 which are formed separator plate 20 and the separator frame member 30a, and 30b one is no the manifold loading area 37 in alignment. 燃料ガス導入マニホールドに導入された燃料ガスは、マニホールド装填口37から上側のセパレータ枠部材30a The fuel gas introduced into the fuel gas inlet manifold, from the manifold mounting slot 37 above the separator frame member 30a
の下面側に設けられたガス流路孔34を通り、さらに、 Through the gas passage hole 34 formed in the lower surface of the further,
セパレータ板20の上面と単セル10の下面との間においてセパレータ板上面に形成された多数の突起21間に連続して形成されている空間領域38を通って矢印方向に流れ、反対側のマニホールド装填口に装填される燃料ガス排出マニホールド(図示せず)に排出される。 Flows in the direction of the arrow through the space region 38 is formed continuously between the plurality of protrusions 21 formed on the separator plate upper surface between the lower surface of the upper surface and the unit cell 10 of the separator plate 20, opposite to the manifold is discharged into the fuel gas discharge manifold to be loaded into the loading opening (not shown).

【0027】上記燃料電池スタックの図3とは直交する方向の断面図が図4に示される。 The cross-sectional view in a direction orthogonal to FIG 3 of the fuel cell stack is shown in FIG. 図4において符号39 Reference numeral 4 39
は、酸化剤ガス導入マニホールド(図示せず)のための装填領域を示す。 Shows the loading area for the oxidant gas inlet manifold (not shown). 酸化剤ガス導入マニホールドに導入された酸化剤ガスは、マニホールド装填口39から下側のセパレータ枠部材30bの上面側に設けられたガス流路孔35を通り、さらに、セパレータ板20と単セル10 Oxidizing gas introduced into the oxidant gas inlet manifold through the gas passage holes 35 provided on the upper surface side of the lower separator frame member 30b from the manifold mounting slot 39 further includes a separator plate 20 single cells 10
との間において多数の突起22間に連続して形成されている空間領域40を通って矢印方向に流れ、反対側のマニホールド装填口に装填される酸化剤ガス排出マニホールド(図示せず)に排出される。 Discharged into a number of flows through the space region 40 is formed continuously in the direction of the arrow between the projections 22, the oxidizing gas discharge manifold to be loaded on the opposite side of the manifold mounting port (not shown) between the It is.

【0028】 [0028]

【発明の効果】本発明によれば、エンボス加工ないしディンプル加工が容易な金属材料の表裏面に電気伝導性に優れたガス不透過性材料をコーティングしたものをセパレータとして用い、この表裏面にエンボス加工ないしディンプル加工を施して突起を多数形成して反応ガス流路溝としたので、反応ガス流路溝の加工が容易であり、セパレータを低コストにて量産することが可能である。 According to the present invention, used as the embossing or dimpled coated with excellent gas impermeable material electrical conductivity on the front and back surfaces of the metal easy material as a separator, embossed in the front and back surface since the processed or multiple forms to the reaction gas flow passage projections subjected to dimple processing, it is easy to process in the reaction gas flow passage, it is possible to mass-produce the separator at a low cost.

【0029】また、従来の平行溝からなる反応ガス流路溝では得られなかった乱流効果により反応ガス供給効率が向上し、酸化剤極における生成水の滞留も解消することができる。 Further, it is possible by conventional consisting parallel grooves reaction gas flow passage in a turbulent effect which can not be obtained by improving the reaction gas supply efficiency and also eliminates accumulation of product water in the oxidant electrode.

【0030】さらには、従来の緻密カーボングラファイトによるセパレータの厚み5.3mmを本発明によればたとえば0.5mm程度にまで薄くすることが可能である。 [0030] Furthermore, it can be thinned to, for example about 0.5mm according to the present invention a conventional separator having a thickness of 5.3mm by dense carbon graphite. このため、多数の燃料電池セルとセパレータとが積層されてなる燃料電池スタックにおいては大幅な小型軽量化が実現される。 Accordingly, and the number of fuel cell and a separator significantly smaller and lighter in a fuel cell stack formed by stacking can be achieved.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例による燃料電池用セパレータに用いられるセパレータ板の上面図である。 1 is a top view of a separator plate used in a fuel cell separator according to an embodiment of the present invention.

【図2】セパレータ枠部材の上面図である。 2 is a top view of the separator frame member.

【図3】図1のセパレータ板を図2のセパレータ枠部材で上下から挟んで構成されるセパレータを用いて得られる2セル燃料電池スタックを示す断面図である。 3 is a cross-sectional view showing a two-cell fuel cell stack obtained by using the separator constituted by sandwiching a separator plate of FIG. 1 from above and below the separator frame member of FIG.

【図4】図3の2セル燃料電池スタックを図3とは直交する方向から見た断面図である。 The [4] 3 2 cell fuel cell stack of FIG. 3 is a sectional view seen from a direction perpendicular.

【図5】従来技術による2セル燃料電池スタックの上面図である。 5 is a top view of a two-cell fuel cell stack according to the prior art.

【図6】図5中A−A線による断面図である。 6 is a sectional view according to in Figure 5 A-A line.

【図7】図5中B−B線による断面図である。 It is a sectional view according to FIG. 7 in Fig 5 B-B line.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 燃料電池単セル 20 セパレータ板 21、22 突起 30 セパレータ枠 30a、30b セパレータ枠部材 23、32 ガスマニホールド装填口 34 燃料ガス流路孔 35 酸化剤ガス流路孔 37 燃料ガス導入マニホールド装填領域 38 燃料ガス流路 39 酸化剤ガス導入マニホールド装填領域 40 酸化剤ガス流路 10 unit cell 20 separator plates 21 and 22 the projection 30 separator frame 30a, 30b separator frame members 23 and 32 gas manifold mounting port 34 the fuel gas flow path hole 35 oxidizing gas channel hole 37 fuel gas inlet manifold loading area 38 to the fuel gas channel 39 oxidizing gas inlet manifold loading area 40 oxidizing gas channel

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 固体電解質の両側に電極を配した燃料電池セルが複数積層されてなる燃料電池スタックにおいて前記燃料電池セルの間に介挿されて用いられ、一方の側面には隣接する一方の燃料電池セルに燃料ガスを供給するための燃料ガス流路溝を備えると共に、他方の側面には隣接する他方の燃料電池セルに酸化剤ガスを供給するための酸化剤ガス流路溝を備えた燃料電池用セパレータであって、加工性に優れた金属材料の表裏面に電気伝導性に優れた材料がコーティングされ、かつ、その表裏面にはそれぞれ多数の突起が適当な間隔を配して設けられ、前記突起は前記燃料電池スタックにおいて前記燃料電池セル面に接するように設けられてなり、前記燃料ガス流路溝および前記酸化剤ガス流路溝が、それぞれ、前記セパレータと前記燃 1. A used fuel cells which arranged electrodes on both sides of a solid electrolyte is interposed between the fuel cells in a fuel cell stack formed by stacking a plurality of one adjacent to the one side provided with a fuel gas flow grooves for supplying a fuel gas to the fuel cell, on the other side with an oxidant gas flow grooves for supplying an oxidant gas to the other adjacent fuel cell a fuel cell separator, a material excellent in electrical conductivity is coated on front and back surfaces of the metal material having excellent workability, and, provided that each number of projections on the front and back surfaces are arranged suitable intervals is, the projection will be provided so as to be in contact with the fuel cell surface in the fuel cell stack, the fuel gas flow grooves and the oxidant gas flow passage grooves, respectively, the said separator retardant 料電池セルとの間において前記突起間に連通形成されることを特徴とする燃料電池用セパレータ。 Fuel cell separator, characterized in that the communicating formed between the projection between the charges battery cells.
  2. 【請求項2】 前記セパレータ枠は厚み方向に2分割された2つのセパレータ枠部材から構成され、前記セパレータ板の周縁部が前記各セパレータ枠部材間に挟持されて一体的に接合されてなることを特徴とする請求項1 Wherein said separator frame consists of two separators frame member that is divided into two in the thickness direction, that formed by integrally bonding perimeter of the separator plate is sandwiched between the separators frame member the features of claim 1
    の燃料電池用セパレータ。 Separator for the fuel cell.
JP4788695A 1995-02-14 1995-02-14 The fuel cell separator Pending JPH08222237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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US6383678B1 (en) 1998-12-21 2002-05-07 Toyota Jidosha Kabushiki Kaisha Separator for fuel cell and a method for producing the separator
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US6444346B1 (en) 1998-07-21 2002-09-03 Matsushita Electric Industrial Co., Ltd. Fuel cells stack
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