JP4026302B2 - Separator for fuel cell - Google Patents

Separator for fuel cell Download PDF

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Publication number
JP4026302B2
JP4026302B2 JP2000205443A JP2000205443A JP4026302B2 JP 4026302 B2 JP4026302 B2 JP 4026302B2 JP 2000205443 A JP2000205443 A JP 2000205443A JP 2000205443 A JP2000205443 A JP 2000205443A JP 4026302 B2 JP4026302 B2 JP 4026302B2
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Prior art keywords
separator
flow path
opening
fluid
fuel cell
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JP2002025585A (en
Inventor
裕一 八神
公秀 堀尾
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Toyota Motor Corp
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Toyota Motor Corp
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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

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Description

【０００１】
【発明の属する技術分野】
本発明は、燃料電池用のセパレータに関し、詳しくは、燃料の供給を受けて発電する単電池を複数積層してなる燃料電池スタックの単電池間の隔壁をなす燃料電池用のセパレータに関する。
【０００２】
【従来の技術】
従来、この種の燃料電池用のセパレータとしては、燃料電池スタック内の単電池の積層方向にガスなどを給排する複数の開口部を外縁部に配置したものが提案されている（特開平１１−３３９８２２号公報など）。この開口部は、他の開口部と対となって連通し流体流路を形成し、ガスはこの流体流路から単電池へ供給される。また、三角形の開口部を隅部に配置したセパレータも提案されている（特開平４−４７６７１号公報など）。このセパレータにおいて、流体流路は、ガスを開口部の斜辺に略直角に流した後外壁に平行に流すよう形成されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、これらのセパレータにおいて、開口部は、ガスの給排を円滑に行なうために所定の開口面積を必要とするが、セパレータの小型化を図ろうとすると所定の開口面積を確保することができない。そこで、所定の開口面積を確保する手法として、開口部をセパレータの外側方向に延長する手法が考えられるが、この手法ではセパレータの外形が膨らみセパレータが大型化してしまう。また、開口部を隣の他の開口部側に延長する手法も考えられるが、この手法では他の開口部を配置する場所が制限され設計の自由度が低下してしまう。
【０００４】
本発明の燃料電池用のセパレータは、セパレータを大型化することなく単電池へ燃料を給排する開口部の開口面積を確保することを目的の一つとする。また、本発明の燃料電池用のセパレータは、設計の自由度を低下させることなく開口部の開口面積を確保することを目的の一つとする。
【０００５】
【課題を解決するための手段およびその作用・効果】
本発明の燃料電池用のセパレータは、上述の目的の少なくとも一部を達成するために以下の手段を採った。
【０００６】
本発明の第１の燃料電池用のセパレータは、
燃料の供給を受けて発電する単電池を複数積層してなる燃料電池スタックの単電池間の隔壁をなし、前記燃料電池スタック内に積層方向の複数対の給排流路を形成するよう縁部に設けられた複数対の開口部と、流体が流れ、前記複数対の開口部のうちの少なくとも一対の開口部を連通する流体流路を形成する流路形成部とを備える燃料電池用のセパレータであって、
前記流路形成部の前記流体流路は、複数の折り返し部によりつづら状に形成され、
前記複数対の開口部のうちの少なくとも一つは、前記流体流路において前記流体が最初に折り返される折り返し部に対向し、前記流体の流れに対して所定の角度を持った斜辺を有し、前記流体流路方向に延長された延長開口部として形成されてなる
ことを要旨とする。
【０００７】
この本発明の第１の燃料電池用のセパレータでは、開口部は、流体流路方向に延長された延長開口部として形成されているので、セパレータの外形を膨らませることなく、即ち、セパレータを大型化することなく所定の開口面積を確保することができる。また、開口部は、流体流路方向に延長されるので他の開口部を配置する場所を制限しない。この結果、設計の自由度の低下を防ぐことができる。
【０００８】
こうした本発明の第１の燃料電池用のセパレータにおいて、前記複数対の開口部のうち四隅に形成された開口部の少なくとも一つが前記流体流路方向に延長された延長開口部として形成されてなるものとすることもできる。こうすれば、四隅に形成された開口部であっても、セパレータの外形を膨らませることなく所定の開口面積を確保することができる。
【０００９】
こうした本発明の第１の燃料電池用のセパレータにおいて、前記延長開口部は、前記流体流路における流体の流れに対し、前記流体が次に折り返される折り返し部の方向に、前記流体流路方向と鋭角をなして傾く斜辺を有するものとすることもできる。こうすれば、延長開口部の隣で折り返す他の流体流路の折り返し部の壁面に、流体が次に折り返される折り返し部の方向に、流体流路方向と鋭角をなす角度を持たせることができ、この折り返し部における流体の流れを円滑にすることができる。
【００１０】
こうした本発明の第１の燃料電池用セパレータにおいて、前記複数対の開口部のうちの前記延長開口部を含む一対の開口部は、同一の側壁に沿って形成されてなるものとすることもできる。
【００１１】
本発明の第２の燃料電池用のセパレータは、
燃料の供給を受けて発電する単電池を複数積層してなる燃料電池スタックの単電池間の隔壁をなし、矩形形状の開口部と、流体が流れる流体流路とを有する矩形形状のセパレータであって、
四隅の少なくとも一つに、外壁に平行な三辺と、前記流体の進行方向に、前記流体流路方向の外壁と鋭角をなす内側の少なくとも一つの斜辺とを有する多角形の隅開口部
を備えることを要旨とする。
【００１２】
この本発明の第２の燃料電池用のセパレータでは、隅開口部の内側の少なくとも一辺が外壁に対して流体の進行方向に、流体流路方向の外壁と鋭角をなす角度で形成されているので、セパレータの矩形形状を維持しセパレータを大型化することなく所定の開口面積を確保することができる。また、他の開口部を配置する場所を制限しないので、設計の自由度の低下を防ぐことができる。
【００１３】
こうした本発明の第２の燃料電池用のセパレータにおいて、前記隅開口部は、他に形成された開口部と連絡する流体流路への流体の供給または流体の排出を行なう開口部であるものとすることもできる。こうすれば、セパレータの矩形形状を維持しつつ所定の開口面積を確保することができるので、流体流路へ流体の供給または排出を良好に行なうことができる。この態様の本発明の燃料電池用セパレータにおいて、前記隅開口部は、他に形成された開口部と連絡する流体流路への流体の供給または流体の排出を行なう開口部であるものとすることもできる。
【００１４】
【発明の実施の形態】
次に、本発明の実施の形態を実施例を用いて説明する。図１は、本発明の一実施例としてのセパレータ２０を備える燃料電池スタック１００の構成の概略を示す構成図である。燃料電池スタック１００は、燃料の供給を受けて発電する単電池１０と、各単電池間に配設され各単電池間の隔壁をなすと共に単電池１０へ燃料を供給するセパレータ２０とが交互に積層されている構成されている。
【００１５】
単電池１０は、図示していないが、例えば、固体高分子電解質膜を２個の触媒電極で挟持したものを更に２個のガス拡散電極で挟持した固体高分子電解質型燃料電池として構成されており、水素リッチな燃料ガス及び空気の供給を受けて発電する。
【００１６】
図２はセパレータ２０の外観を示す斜視図である。セパレータ２０は、外形が矩形形状をなしており、縁部に形成された６個の開口部２２ａ，２２ｂ，２４ａ，２４ｂ，２６ａ，２６ｂと、開口部２２ａと２２ｂとの間を連通する流通溝２８とを備える。図１に示すように、単電池１０とセパレータ２０を交互に積層することにより、各開口部は、単電池の積層方向に連通して流路を形成する。これらの流路が空気給排流路，燃料ガス給排流路または冷却水給排流路として用いられる。なお、セパレータ２０の図２の裏面側には、開口部２４ａと２４ｂとを連通する流通溝２８と同様の流通溝が形成されている。
【００１７】
隅部の開口部２２ｂ，２４ｂは、セパレータ２０の外壁に平行な３辺と外壁に対して鋭角な斜辺とからなる四辺形として形成されており、流通溝２８により形成される流路方向に延長されている。この結果、セパレータ２０の外形を膨らませることなく開口部２２ｂ，２４ｂの開口面積を大きくすることができ、開口部２２ｂ，２４ｂから空気または燃料ガスの排出を良好に行なうことができる。
【００１８】
流通溝２８は、折り返し部３２，３４，３６によりつづら折り状に形成され、底部に複数のリブ３０を備えており、単電池１０とセパレータ２０とを積層したときに、開口部２２ａと開口部２２ｂとを連通する流体流路が形成される。開口部２２ａに供給した空気は、この流体流路を通る際にその一部が単電池１０に供給され、残りが開口部２２ｂから排出される。折り返し部３２の壁面は、開口部２４ｂの斜辺と隣り合っているためセパレータ２０ａの外壁に対して所定の角度を持って傾いて形成されている。この結果、開口部２２ａに供給した空気は、折り返し部３２で折り返しすとき角部で淀むことなく円滑に流れることができる。
【００１９】
尚、燃料電池スタック１００には、開口部２６ａと２６ｂとを連通する流通溝を備える他のセパレータ（図示せず）も設けられており、冷却水を開口部２６ａ，２６ｂに給排することにより燃料電池スタック１００を冷却できるようになっている。
【００２０】
以上説明した本実施例のセパレータ２０によれば、開口部２２ｂ，２４ｂを外壁に平行な３辺と外壁に対して鋭角な斜辺とからなる四辺形とし、流体流路方向へ延長した形状とすることにより、セパレータ２０の外形を膨らませることなく開口面積を大きくすることができ、空気または燃料ガスの排出を良好に行なうことができる。しかも、流通溝の折り返し部の壁面が傾いて形成されているので、この壁面の角部で空気または燃料が淀むことなく円滑に流れる。
【００２１】
本実施例のセパレータ２０では、開口部２２ｂ，２４ｂの内側の辺は外壁に対して鋭角に傾いているものとしたが、開口部２２ｂ，２４ｂの開口形状は４辺が外壁に対して平行な長方形であり、流路方向に延長されているものとすることもできる。
【００２２】
また、本実施例のセパレータ２０では、隅部の開口部２２ｂ，２４ｂの内側の辺は外壁に対して鋭角に傾いているものとしたが、隅部の開口部２２ａ，２４ａの内側の辺を外壁に対して鋭角に傾いているものとすることもできる。
【００２３】
さらに、本実施例のセパレータ２０では、開口部２２ｂ，２４ｂの開口形状は四辺形であるが、四辺形に限定したものでなく、外壁に対して内側の辺が傾いた他の多角形とすることもできる。
【００２４】
そして、本実施例のセパレータ２０では、単電池１０は固体高分子電解質型燃料電池であるものとしたが、これに限定したものでなく、別の型の単電池にすることもできる。この場合、開口部から供給する燃料ガス等については、適宜変えることができる。
【００２５】
以上、本発明の実施の形態について実施例を用いて説明したが、本発明はこうした実施例に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。
【図面の簡単な説明】
【図１】 本発明の一実施例としてのセパレータを備える燃料電池スタックの構成の概略を示す構成図である。
【図２】 セパレータ２０の外観を示す斜視図である。
【符号の説明】
１０ 単電池、２０ セパレータ、２２ａ，２２ｂ，２４ａ，２４ｂ，２６ａ，２６ｂ 開口部、２８ 流通溝、１００ 燃料電池スタック。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a separator for a fuel cell, and more particularly to a separator for a fuel cell that forms a partition wall between cells of a fuel cell stack formed by stacking a plurality of unit cells that receive power and generate electricity.
[0002]
[Prior art]
Conventionally, as a separator for this type of fuel cell, a separator in which a plurality of openings for supplying and discharging gas and the like in the stacking direction of the single cells in the fuel cell stack are arranged at the outer edge has been proposed (Japanese Patent Laid-Open No. 11) -339822). This opening communicates with another opening to form a fluid flow path, and gas is supplied from this fluid flow path to the unit cell. In addition, a separator in which a triangular opening is arranged at a corner has been proposed (Japanese Patent Laid-Open No. 4-47671). In this separator, the fluid flow path is formed to flow in parallel to the outer wall after flowing the gas substantially perpendicularly to the oblique side of the opening.
[0003]
[Problems to be solved by the invention]
However, in these separators, the opening portion needs a predetermined opening area in order to smoothly supply and discharge gas, but if the separator is to be downsized, the predetermined opening area cannot be secured. Thus, as a technique for securing a predetermined opening area, a technique of extending the opening in the outer direction of the separator is conceivable. However, in this technique, the outer shape of the separator swells and the separator becomes large. Although a method of extending the opening to the side of another adjacent opening is conceivable, this method restricts a place where the other opening is arranged and reduces the degree of freedom in design.
[0004]
The separator for a fuel cell according to the present invention has an object of securing an opening area of an opening through which fuel is supplied to and discharged from a single cell without increasing the size of the separator. Another object of the separator for a fuel cell according to the present invention is to secure the opening area of the opening without reducing the degree of freedom in design.
[0005]
[Means for solving the problems and their functions and effects]
The separator for a fuel cell of the present invention employs the following means in order to achieve at least a part of the above object.
[0006]
The separator for the first fuel cell of the present invention is:
Formed as a partition between cells of a fuel cell stack formed by stacking a plurality of unit cells that generate power upon receiving fuel supply, and to form a plurality of pairs of supply / discharge channels in the stacking direction in the fuel cell stack A separator for a fuel cell , comprising: a plurality of pairs of openings provided in a fluid passage; and a flow path forming portion that forms a fluid flow path through which fluid flows and communicates with at least a pair of openings of the plurality of pairs of openings. Because
The fluid flow path of the flow path forming portion is formed in a zigzag shape by a plurality of folded portions,
At least one of the plurality of pairs of openings has a hypotenuse having a predetermined angle with respect to the fluid flow, facing a folded portion where the fluid is first folded in the fluid flow path, It is formed as an extended opening extending in the fluid flow path direction.
[0007]
In the first fuel cell separator of the present invention, the opening is formed as an extended opening extending in the direction of the fluid flow path, so that the outer shape of the separator is not expanded, that is, the separator is large-sized. A predetermined opening area can be ensured without the need for conversion. Moreover, since an opening part is extended in the fluid flow path direction, it does not restrict | limit the place which arrange | positions another opening part. As a result, it is possible to prevent a reduction in design freedom.
[0008]
In the first fuel cell separator of the present invention, at least one of the openings formed at the four corners of the plurality of pairs of openings is formed as an extended opening extending in the fluid flow path direction. It can also be. In this way, even if the openings are formed at the four corners, a predetermined opening area can be secured without expanding the outer shape of the separator.
[0009]
In the first fuel cell separator according to the present invention, the extension opening is formed in a direction of the fluid flow path in the direction of the folded portion where the fluid is folded back with respect to the fluid flow in the fluid flow path. It can also have a hypotenuse that tilts at an acute angle . In this way, the wall surface of the folded portion of the other fluid flow path that is folded next to the extension opening can have an angle that forms an acute angle with the fluid flow path direction in the direction of the folded portion where the fluid is folded back next. The fluid flow in the folded portion can be made smooth.
[0010]
In the first fuel cell separator of the present invention, the pair of openings including the extension opening of the plurality of pairs of openings may be formed along the same side wall. .
[0011]
The separator for the second fuel cell of the present invention is
It name the partition wall between unit cells of a fuel cell stack the unit cells for generating electricity by being supplied with fuel formed by stacking a plurality and the opening of the rectangular shape, with a separator of a rectangular shape having a fluid flow path through which fluid flows There,
A polygonal corner opening having at least one of the four corners having three sides parallel to the outer wall and at least one inner oblique side that forms an acute angle with the outer wall in the fluid flow path direction in the fluid traveling direction. This is the gist.
[0012]
In the second fuel cell separator of the present invention, at least one side inside the corner opening is formed at an angle that makes an acute angle with the outer wall in the fluid flow path direction in the fluid traveling direction with respect to the outer wall . The rectangular shape of the separator can be maintained and a predetermined opening area can be secured without increasing the size of the separator. Moreover, since the place which arrange | positions another opening part is not restrict | limited, the fall of the freedom degree of design can be prevented.
[0013]
In such a separator for the second fuel cell of the present invention, the corner opening is an opening for supplying fluid to or discharging fluid from a fluid flow path communicating with the other formed opening. You can also In this way, a predetermined opening area can be secured while maintaining the rectangular shape of the separator, so that the fluid can be supplied or discharged satisfactorily. In this aspect of the fuel cell separator according to the present invention, the corner opening is an opening that supplies or discharges fluid to or from a fluid passage that communicates with another formed opening. You can also.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram showing an outline of a configuration of a fuel cell stack 100 including a separator 20 as one embodiment of the present invention. In the fuel cell stack 100, the unit cells 10 that generate power upon supply of fuel and separators 20 that are arranged between the unit cells and that form a partition between the unit cells and supply fuel to the unit cells 10 are alternately arranged. It is configured to be stacked.
[0015]
Although not shown, the unit cell 10 is configured as a solid polymer electrolyte fuel cell in which a solid polymer electrolyte membrane sandwiched between two catalyst electrodes is further sandwiched between two gas diffusion electrodes. It generates electricity by supplying hydrogen-rich fuel gas and air.
[0016]
FIG. 2 is a perspective view showing the appearance of the separator 20. The separator 20 has a rectangular outer shape, and has six openings 22 a, 22 b, 24 a, 24 b, 26 a, and 26 b formed at the edge and a flow groove that communicates between the openings 22 a and 22 b. 28. As shown in FIG. 1, the unit cells 10 and the separators 20 are alternately stacked, so that each opening communicates in the stacking direction of the unit cells to form a flow path. These flow paths are used as an air supply / discharge flow path, a fuel gas supply / discharge flow path, or a cooling water supply / discharge flow path. 2 is formed on the back side of the separator 20 in FIG. 2, similar to the flow groove 28 that communicates the openings 24 a and 24 b.
[0017]
The openings 22b and 24b at the corners are formed as quadrilaterals having three sides parallel to the outer wall of the separator 20 and an oblique side with an acute angle with respect to the outer wall, and extend in the direction of the flow path formed by the flow grooves 28. Has been. As a result, the opening areas of the openings 22b and 24b can be increased without expanding the outer shape of the separator 20, and air or fuel gas can be discharged from the openings 22b and 24b satisfactorily.
[0018]
The circulation groove 28 is formed in a zigzag manner by the folded portions 32, 34, and 36, and includes a plurality of ribs 30 at the bottom. When the unit cell 10 and the separator 20 are stacked, the opening 22 a and the opening 22 b are provided. Is formed. A part of the air supplied to the opening 22a is supplied to the unit cell 10 when passing through the fluid flow path, and the rest is discharged from the opening 22b. Since the wall surface of the folded portion 32 is adjacent to the oblique side of the opening 24b, the wall surface is inclined with a predetermined angle with respect to the outer wall of the separator 20a. As a result, the air supplied to the opening 22a can flow smoothly without being trapped at the corners when folded at the folded portion 32.
[0019]
The fuel cell stack 100 is also provided with another separator (not shown) having a flow groove communicating the openings 26a and 26b. By supplying and discharging cooling water to and from the openings 26a and 26b, The fuel cell stack 100 can be cooled.
[0020]
According to the separator 20 of the present embodiment described above, the openings 22b and 24b have a quadrilateral shape including three sides parallel to the outer wall and an oblique side that is acute with respect to the outer wall, and has a shape extending in the fluid flow path direction. Thus, the opening area can be increased without expanding the outer shape of the separator 20, and the air or fuel gas can be discharged well. And since the wall surface of the folding | turning part of a circulation groove is inclined, air or fuel flows smoothly without stagnating in the corner | angular part of this wall surface.
[0021]
In the separator 20 of the present embodiment, the inner sides of the openings 22b and 24b are inclined at an acute angle with respect to the outer wall. However, the four sides of the openings 22b and 24b are parallel to the outer wall. It may be rectangular and may be extended in the flow path direction.
[0022]
Further, in the separator 20 of the present embodiment, the inner sides of the corner openings 22b and 24b are inclined at an acute angle with respect to the outer wall, but the inner sides of the corner openings 22a and 24a are It may be inclined at an acute angle with respect to the outer wall.
[0023]
Furthermore, in the separator 20 of the present embodiment, the opening shapes of the openings 22b and 24b are quadrilaterals, but are not limited to quadrilaterals, but are other polygons whose inner sides are inclined with respect to the outer wall. You can also
[0024]
In the separator 20 of the present embodiment, the unit cell 10 is a solid polymer electrolyte fuel cell. However, the unit cell is not limited to this, and may be another unit cell. In this case, the fuel gas supplied from the opening can be appropriately changed.
[0025]
The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course you get.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of a configuration of a fuel cell stack including a separator as one embodiment of the present invention.
FIG. 2 is a perspective view showing an appearance of a separator 20. FIG.
[Explanation of symbols]
10 unit cells, 20 separators, 22a, 22b, 24a, 24b, 26a, 26b openings, 28 flow channels, 100 fuel cell stacks.

Claims (7)

燃料の供給を受けて発電する単電池を複数積層してなる燃料電池スタックの単電池間の隔壁をなし、前記燃料電池スタック内に積層方向の複数対の給排流路を形成するよう縁部に設けられた複数対の開口部と、流体が流れ、前記複数対の開口部のうちの少なくとも一対の開口部を連通する流体流路を形成する流路形成部とを備える燃料電池用のセパレータであって、
前記流路形成部の前記流体流路は、複数の折り返し部によりつづら状に形成され、
前記複数対の開口部のうちの少なくとも一つは、前記流体流路において前記流体が最初に折り返される折り返し部に対向し、前記流体の流れに対して所定の角度を持った斜辺を有し、前記流体流路方向に延長された延長開口部として形成されてなる
燃料電池用のセパレータ。Formed as a partition between cells of a fuel cell stack formed by stacking a plurality of unit cells that generate power upon receiving fuel supply, and to form a plurality of pairs of supply / discharge channels in the stacking direction in the fuel cell stack A separator for a fuel cell , comprising: a plurality of pairs of openings provided in a fluid passage; and a flow path forming portion that forms a fluid flow path through which fluid flows and communicates with at least a pair of openings of the plurality of pairs of openings. Because
The fluid flow path of the flow path forming portion is formed in a zigzag shape by a plurality of folded portions,
At least one of the plurality of pairs of openings has a hypotenuse having a predetermined angle with respect to the fluid flow, facing a folded portion where the fluid is first folded in the fluid flow path, A separator for a fuel cell, formed as an extended opening extending in the fluid flow path direction. 前記複数対の開口部のうち四隅に形成された開口部の少なくとも一つが前記流体流路方向に延長された延長開口部として形成されてなる請求項１記載の燃料電池用のセパレータ。  2. The fuel cell separator according to claim 1, wherein at least one of the openings formed at four corners of the plurality of pairs of openings is formed as an extended opening extending in the fluid flow path direction. 前記延長開口部は、前記流体流路における前記流体の流れに対し、前記流体が次に折り返される折り返し部の方向に、前記流体流路方向と鋭角をなして傾く斜辺を有する請求項１または２記載の燃料電池用のセパレータ。Said extension opening to the flow of the fluid in the fluid flow path, the direction of the folded portion in which the fluid is then folded back, claim 1 or 2 having a hypotenuse inclined form the fluid flow path direction at an acute angle The separator for fuel cells as described. 前記複数対の開口部のうちの前記延長開口部を含む一対の開口部は、同一の側壁に沿って形成されてなる請求項１〜３のいずれかに記載の燃料電池用のセパレータ。  The separator for a fuel cell according to any one of claims 1 to 3, wherein the pair of openings including the extended opening of the plurality of pairs of openings is formed along the same side wall. 燃料の供給を受けて発電する単電池を複数積層してなる燃料電池スタックの単電池間の隔壁をなし、矩形形状の開口部と、流体が流れる流体流路とを有する矩形形状のセパレータであって、
四隅の少なくとも一つに、外壁に平行な三辺と、前記流体の進行方向に、前記流体流路方向の外壁と鋭角をなす内側の少なくとも一つの斜辺とを有する多角形の隅開口部
を備える燃料電池用のセパレータ。 It name the partition wall between unit cells of a fuel cell stack the unit cells for generating electricity by being supplied with fuel formed by stacking a plurality and the opening of the rectangular shape, with a separator of a rectangular shape having a fluid flow path through which fluid flows There,
A polygonal corner opening having at least one of the four corners having three sides parallel to the outer wall and at least one inner oblique side that forms an acute angle with the outer wall in the fluid flow path direction in the fluid traveling direction. Separator for fuel cells. 前記隅開口部は、他に形成された開口部と連絡する流体流路への流体の供給または流体の排出を行なう開口部である請求項５に記載の燃料電池用のセパレータ。  6. The fuel cell separator according to claim 5, wherein the corner opening is an opening for supplying fluid to or discharging fluid from a fluid flow path communicating with another formed opening. 前記隅開口部と前記他に形成された開口部とは、同一の側壁に沿って形成されてなる請求項６に記載の燃料電池用のセパレータ。  The separator for a fuel cell according to claim 6, wherein the corner opening and the other opening are formed along the same side wall.
JP2000205443A 2000-07-06 2000-07-06 Separator for fuel cell Expired - Fee Related JP4026302B2 (en)

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