JP2003217615A - Fuel cell separator - Google Patents
Fuel cell separatorInfo
- Publication number
- JP2003217615A JP2003217615A JP2002008341A JP2002008341A JP2003217615A JP 2003217615 A JP2003217615 A JP 2003217615A JP 2002008341 A JP2002008341 A JP 2002008341A JP 2002008341 A JP2002008341 A JP 2002008341A JP 2003217615 A JP2003217615 A JP 2003217615A
- Authority
- JP
- Japan
- Prior art keywords
- gas flow
- gas
- width
- ridge
- fuel cell
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 57
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 36
- 238000010248 power generation Methods 0.000 claims abstract description 35
- 238000009792 diffusion process Methods 0.000 claims description 23
- 230000007423 decrease Effects 0.000 abstract description 29
- 239000005518 polymer electrolyte Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 7
- 238000005192 partition Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 162
- 230000001590 oxidative effect Effects 0.000 description 24
- 239000002737 fuel gas Substances 0.000 description 21
- 239000001257 hydrogen Substances 0.000 description 10
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- 239000003792 electrolyte Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- -1 hydrogen ions Chemical class 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 239000003014 ion exchange membrane Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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
Landscapes
- Fuel Cell (AREA)
Abstract
(57)【要約】
【課題】 固体高分子電解質型燃料電池のセパレータ
で、ガス下流側での発電効率の低下を抑制できる燃料電
池のセパレータを提供すること。
【解決手段】 （１）燃料電池の発電面にガスを供給す
るガス流路２７を仕切る畝２８の幅をガス流れ方向に変
える。（２）構成（１）において、上流は畝２８の幅が
広く、下流は畝２８の幅が狭い。（３）畝の幅Ａとガス
流路２７の幅Ｂの比Ａ／Ｂをガス流れ方向に変える。
（４）構成（３）において、上流は比Ａ／Ｂが大で、下
流は比Ａ／Ｂが小である。
(57) [Problem] To provide a separator for a solid polymer electrolyte fuel cell, which can suppress a decrease in power generation efficiency on the gas downstream side. SOLUTION: (1) The width of a ridge 28 that partitions a gas flow path 27 that supplies gas to a power generation surface of a fuel cell is changed in a gas flow direction. (2) In the configuration (1), the width of the ridge 28 is large at the upstream and the width of the ridge 28 is small at the downstream. (3) The ratio A / B of the width A of the ridge to the width B of the gas flow path 27 is changed in the gas flow direction.
(4) In the configuration (3), the ratio A / B is large at the upstream and the ratio A / B is small at the downstream.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、燃料電池、とくに
固体高分子電解質型燃料電池（ＰＥＭＦＣ）のセパレー
タ構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell, and more particularly to a separator structure for a solid polymer electrolyte fuel cell (PEMFC).
【０００２】[0002]
【従来の技術】固体高分子電解質型燃料電池は、イオン
交換膜からなる電解質膜とこの電解質膜の一面に配置さ
れた触媒層からなる電極（アノード、燃料極）および電
解質膜の他面に配置された触媒層からなる電極（カソー
ド、空気極）とからなる膜−電極アッセンブリ（ＭＥ
Ａ：Membrane-Electrode Assembly ）と、ＭＥＡの両側
に配された拡散層と、アノード、カソードに燃料ガス
（水素）および酸化ガス（酸素、通常は空気）を供給す
るためのガス流路および冷媒流路を形成したセパレータ
とからセルを構成し、１以上のセルを重ねてモジュール
を構成し、モジュールを積層してセル積層体とし、セル
積層体のセル積層方向両端に、ターミナル、インシュレ
ータ、エンドプレートを配置してスタックを構成し、ス
タックをセル積層方向に締め付け、スタックをセル積層
体の外側でセル積層方向に延びる締結部材（たとえば、
テンションプレート、テンションボルトなど）にて固定
したものからなる。固体高分子電解質型燃料電池では、
アノード側では、水素を水素イオンと電子にする反応が
行われ、水素イオンは電解質膜中をカソード側に移動
し、カソード側では酸素と水素イオンおよび電子（隣り
のＭＥＡのアノードで生成した電子がセパレータを通し
てくる、両端セルでは一端のセルのアノードの電子が外
部回路を通って他端のセルのカソードにくる）から水を
生成する反応が行われる。アノード側：Ｈ2 →２Ｈ+ ＋
２ｅ-カソード側：２Ｈ+ ＋２ｅ- ＋（１／２）Ｏ2 →
Ｈ2 Ｏセパレータはガス流路となる複数の溝と溝間を仕
切る畝（リブ、山）とを有する。セパレータの畝の頂面
と拡散層との接触部を通して電流が流れるので、畝の幅
が大で接触圧が大きいほど電気接触抵抗が低くなり、発
電効率が高くなる。その反面、畝の幅が大で接触圧が大
きくなり過ぎると畝によって押されている拡散層部分へ
の水素、酸素の回り込みが悪くなり、発電効率が低下す
る。特開２００１−７６７４６号公報は、燃料電池のセ
パレータのガス流路を仕切る畝の幅に言及しており、平
行流路群内の畝幅より平行流路群間の畝幅を大きくして
ガスのショートパスを減少させることを開示している。
ただし、特開２００１−７６７４６号公報開示のセパレ
ータの畝など、従来のセパレータの畝は、畝幅がガス流
れ方向に一定であった。2. Description of the Related Art In a solid polymer electrolyte fuel cell, an electrode (anode, fuel electrode) composed of an electrolyte membrane composed of an ion exchange membrane and a catalyst layer arranged on one surface of the electrolyte membrane and another surface of the electrolyte membrane are arranged. MEMBRANE-ELECTRODE ASSEMBLY (ME
A: Membrane-Electrode Assembly), diffusion layers arranged on both sides of the MEA, gas channels and refrigerant flow for supplying fuel gas (hydrogen) and oxidizing gas (oxygen, usually air) to the anode and cathode. A cell is composed of a separator having a channel, and one or more cells are stacked to form a module. The modules are stacked to form a cell stack, and terminals, insulators, and end plates are provided at both ends of the cell stack in the cell stacking direction. To form a stack, tighten the stack in the cell stacking direction, and fasten the stack outside the cell stack in the cell stacking direction (for example,
It is fixed with a tension plate, tension bolt, etc.). In the solid polymer electrolyte fuel cell,
On the anode side, hydrogen is converted into hydrogen ions and electrons, the hydrogen ions move in the electrolyte membrane to the cathode side, and on the cathode side, oxygen and hydrogen ions and electrons (electrons generated at the anode of the adjacent MEA are In the both-end cell that comes through the separator, the electrons of the anode of the one end cell pass through the external circuit and come to the cathode of the other end cell) to generate water. Anode side: H 2 → 2H + +
2e - cathode: 2H + + 2e - + ( 1/2) O 2 →
The H 2 O separator has a plurality of grooves serving as gas flow paths and ridges (ribs, peaks) partitioning the spaces between the grooves. Since a current flows through the contact portion between the top surface of the ridge of the separator and the diffusion layer, the larger the ridge width and the larger the contact pressure, the lower the electrical contact resistance and the higher the power generation efficiency. On the other hand, if the width of the ridge is large and the contact pressure becomes too large, hydrogen and oxygen will not easily flow into the diffusion layer portion pressed by the ridge, resulting in a decrease in power generation efficiency. Japanese Unexamined Patent Publication No. 2001-76746 refers to the width of the ridges that partition the gas flow paths of the separator of the fuel cell. It is disclosed that the short pass of the above is reduced.
However, in the ridges of conventional separators such as the ridges of the separator disclosed in JP 2001-76746 A, the ridge width was constant in the gas flow direction.
【０００３】[0003]
【発明が解決しようとする課題】しかし、ガス流路を流
れる水素または酸素の濃度は、発電反応で水素、酸素が
消費されるので、それぞれのガス流路の下流側ほど、低
くなる。その結果、畝幅が一定の場合、ガス流路下流で
の濃度過電圧が大きくなる。すなわち、下流側で、畝に
よって押されている拡散層部分への水素、酸素の回り込
みが悪くなり、触媒層へのガスの拡散不足が生じ、発電
効率が低下する。本発明の目的は、固体高分子電解質型
燃料電池のセパレータで、ガス下流側での発電効率の低
下を抑制できる燃料電池のセパレータを提供することに
ある。However, the concentration of hydrogen or oxygen flowing through the gas flow passage becomes lower toward the downstream side of each gas flow passage because hydrogen and oxygen are consumed in the power generation reaction. As a result, when the ridge width is constant, the concentration overvoltage on the downstream side of the gas flow path becomes large. That is, on the downstream side, hydrogen and oxygen do not easily flow into the diffusion layer portion pressed by the ridges, gas diffusion to the catalyst layer is insufficient, and power generation efficiency is reduced. An object of the present invention is to provide a separator for a solid polymer electrolyte fuel cell, which is capable of suppressing a decrease in power generation efficiency on the gas downstream side.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成する本発
明はつぎの通りである。
（１） 燃料電池の発電面にガスを供給するガス流路
と、該ガス流路の側部で盛り上がり頂面で拡散層に接触
する畝とを有する燃料電池のセパレータであって、前記
畝の幅をガス流れ方向に変化させた燃料電池のセパレー
タ。
（２） ガス流れ方向上流側から下流側に、畝幅を連続
的または段階的に狭くした（１）記載の燃料電池のセパ
レータ。
（３） ガス流れ方向上流側から下流側に、ガス流路幅
を連続的または段階的に狭くした（２）記載の燃料電池
のセパレータ。
（４） 燃料電池の発電面にガスを供給するガス流路
と、該ガス流路の側部で盛り上がり頂面で拡散層に接触
する畝とを有する燃料電池のセパレータであって、畝の
幅をＡ、該畝に隣接する部位のガス流路の幅をＢとした
ときに、比Ａ／Ｂをガス流れ方向に変化させた燃料電池
のセパレータ。
（５） ガス流れ方向上流側から下流側に、比Ａ／Ｂを
連続的または段階的に小さくした（４）記載の燃料電池
のセパレータ。
（６） ガス流れ方向上流側から下流側に、ガス流路幅
を連続的または段階的に狭くした（５）記載の燃料電池
のセパレータ。The present invention which achieves the above object is as follows. (1) A fuel cell separator having a gas flow path for supplying gas to a power generation surface of a fuel cell, and a ridge that rises at a side portion of the gas flow path and contacts a diffusion layer at a top surface thereof. A fuel cell separator whose width changes in the gas flow direction. (2) The fuel cell separator according to (1), wherein the ridge width is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction. (3) The fuel cell separator according to (2), wherein the gas flow channel width is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction. (4) A fuel cell separator having a gas flow path for supplying gas to the power generation surface of the fuel cell and a ridge that rises on the side of the gas flow path and contacts the diffusion layer on the top surface, the width of the ridge being Where A is B and the width of the gas flow path in the region adjacent to the ridge is B, the fuel cell separator in which the ratio A / B is changed in the gas flow direction. (5) The fuel cell separator according to (4), in which the ratio A / B is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction. (6) The fuel cell separator according to (5), wherein the gas flow channel width is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction.
【０００５】上記（１）の燃料電池のセパレータでは、
畝の幅をガス流れ方向に変化させたので、畝幅を適切に
変化させることにより畝幅一定の場合よりも、ガス流路
下流での濃度過電圧を小さくでき、発電効率の低下を抑
制できる。上記（２）の燃料電池のセパレータでは、ガ
ス流れ方向上流側から下流側に、畝幅を連続的または段
階的に狭くしたので、畝幅一定の場合よりも、ガス流路
下流での濃度過電圧を小さくでき、発電効率の低下を抑
制できる。上記（３）の燃料電池のセパレータでは、ガ
ス流れ方向上流側から下流側に、ガス流路幅を連続的ま
たは段階的に狭くしたので、ガスが消費されても下流側
でのガス濃度低下が抑制され、より一層、ガス流路下流
での濃度過電圧を小さくでき、発電効率の低下を抑制で
きる。上記（４）の燃料電池のセパレータでは、畝幅を
ガス流路幅との比で特定し、畝の幅をＡ、該畝に隣接す
る部位のガス流路の幅をＢとしたときに、比Ａ／Ｂをガ
ス流れ方向に変化させたので、比Ａ／Ｂを適切に変化さ
せることにより比Ａ／Ｂ一定の場合よりも、ガス流路下
流での濃度過電圧を小さくでき、発電効率の低下を抑制
できる。上記（５）の燃料電池のセパレータでは、ガス
流れ方向上流側から下流側に、比Ａ／Ｂを連続的または
段階的に小さくしたので、比Ａ／Ｂ一定の場合よりも、
ガス流路下流での濃度過電圧を小さくでき、発電効率の
低下を抑制できる。上記（６）の燃料電池のセパレータ
では、ガス流れ方向上流側から下流側に、ガス流路幅を
連続的または段階的に狭くしたガスが消費されても下流
側でのガス濃度低下が抑制され、より一層、ガス流路下
流での濃度過電圧を小さくでき、発電効率の低下を抑制
できる。In the fuel cell separator of the above (1),
Since the width of the ridge is changed in the gas flow direction, by appropriately changing the width of the ridge, the concentration overvoltage on the downstream side of the gas flow channel can be made smaller than in the case where the width of the ridge is constant, and the decrease in power generation efficiency can be suppressed. In the fuel cell separator of the above (2), since the ridge width is continuously or stepwise narrowed from the upstream side to the downstream side in the gas flow direction, the concentration overvoltage at the downstream of the gas flow channel is smaller than that when the ridge width is constant. Can be reduced, and a decrease in power generation efficiency can be suppressed. In the fuel cell separator of the above (3), the gas flow passage width is continuously or stepwise narrowed from the upstream side to the downstream side in the gas flow direction. Therefore, even if the gas is consumed, the gas concentration on the downstream side is reduced. As a result, the concentration overvoltage can be further reduced in the downstream of the gas flow path, and the decrease in power generation efficiency can be suppressed. In the fuel cell separator of the above (4), when the ridge width is specified by the ratio with the gas flow channel width, the ridge width is A, and the gas flow channel width of a portion adjacent to the ridge is B, Since the ratio A / B was changed in the gas flow direction, by appropriately changing the ratio A / B, the concentration overvoltage at the downstream of the gas flow path can be made smaller than in the case where the ratio A / B is constant, and the power generation efficiency can be improved. The decrease can be suppressed. In the fuel cell separator of the above (5), the ratio A / B is continuously or stepwise reduced from the upstream side to the downstream side in the gas flow direction.
It is possible to reduce the concentration overvoltage in the downstream of the gas flow path and suppress the decrease in power generation efficiency. In the fuel cell separator of the above (6), even if the gas in which the gas flow channel width is narrowed continuously or stepwise is consumed from the upstream side to the downstream side in the gas flow direction, the decrease in gas concentration on the downstream side is suppressed. Further, the concentration overvoltage on the downstream side of the gas flow path can be further reduced, and the decrease in power generation efficiency can be suppressed.
【０００６】[0006]
【発明の実施の形態】以下に、本発明の燃料電池のセパ
レータを、図１〜図４を参照して、説明する。図中、図
１、図２は本発明の何れの実施例にも適用可能であり、
図３は本発明の実施例１を示し、図４は本発明の実施例
２を示す。本発明の何れの実施例にも共通する部分に
は、本発明の実施例１、２にわたって同じ符号を付して
ある。まず、本発明の何れの実施例にも共通する部分
を、たとえば図１、図２、および図３を参照して、説明
する。BEST MODE FOR CARRYING OUT THE INVENTION A separator for a fuel cell according to the present invention will be described below with reference to FIGS. 1 and 2 are applicable to any of the embodiments of the present invention.
3 shows Embodiment 1 of the present invention, and FIG. 4 shows Embodiment 2 of the present invention. The portions common to any of the embodiments of the present invention are denoted by the same reference numerals in Embodiments 1 and 2 of the present invention. First, a portion common to any of the embodiments of the present invention will be described with reference to, for example, FIGS. 1, 2, and 3.
【０００７】本発明のガス流路が適用される燃料電池
は、固体高分子電解質型燃料電池１０である。燃料電池
１０は、たとえば燃料電池自動車に搭載される。ただ
し、自動車以外に用いられてもよい。固体高分子電解質
型燃料電池１０は、図１、図２に示すように、イオン交
換膜からなる電解質膜１１とこの電解質膜１１の一面に
配置された触媒層１２からなる電極１４（アノード、燃
料極）および電解質膜１１の他面に配置された触媒層１
５からなる電極１７（カソード、空気極）とからなる膜
−電極アッセンブリ（ＭＥＡ：Membrane-Electrode Ass
embly ）と、電極１４、１７に燃料ガス（水素）および
酸化ガス（酸素、通常は空気）を供給するための流体通
路２７および燃料電池冷却用の冷却水が流れる冷却水流
路２６を形成したセパレータ１８とを重ねてセルを形成
し、該セルを少なくとも１層積層してモジュール１９を
構成し（たとえば、２セルから１モジュールを構成
し）、モジュール１９を積層してセル積層体とし、セル
積層体のセル積層方向両端に、ターミナル２０、インシ
ュレータ２１、エンドプレート２２を配置してスタック
２３を構成し、スタック２３をセル積層方向に締め付け
セル積層体の外側でセル積層方向に延びる締結部材２４
（たとえば、テンションプレート、スルーボルトなど）
とボルト２５またはナットで固定したものからなる。Ｍ
ＥＡとセパレータ１８との間には、アノード側に拡散層
１３、カソード側に拡散層１６が、それぞれ配置され
る。The fuel cell to which the gas passage of the present invention is applied is a solid polymer electrolyte fuel cell 10. The fuel cell 10 is mounted in, for example, a fuel cell vehicle. However, it may be used for other than automobiles. As shown in FIGS. 1 and 2, the solid polymer electrolyte fuel cell 10 includes an electrode 14 (an anode, a fuel) including an electrolyte membrane 11 made of an ion exchange membrane and a catalyst layer 12 arranged on one surface of the electrolyte membrane 11. Electrode) and the catalyst layer 1 disposed on the other surface of the electrolyte membrane 11
A membrane-electrode assembly (MEA: Membrane-Electrode Assy) consisting of an electrode 17 (cathode, air electrode) consisting of 5
embly) and a separator having a fluid passage 27 for supplying fuel gas (hydrogen) and an oxidizing gas (oxygen, usually air) to the electrodes 14 and 17, and a cooling water flow passage 26 through which cooling water for cooling the fuel cell flows. 18 is stacked to form a cell, and at least one layer of the cell is laminated to form a module 19 (for example, one module is formed from 2 cells), and the module 19 is laminated to form a cell laminated body. A terminal 20, an insulator 21, and an end plate 22 are arranged at both ends of the body in the cell stacking direction to form a stack 23. The stack 23 is fastened in the cell stacking direction, and a fastening member 24 extending outside the cell stacking body in the cell stacking direction.
(For example, tension plate, through bolt, etc.)
And fixed with bolts 25 or nuts. M
Between the EA and the separator 18, the diffusion layer 13 is arranged on the anode side and the diffusion layer 16 is arranged on the cathode side.
【０００８】触媒層１２、１５は、触媒たとえば白金
（Ｐｔ）と、カーボン（Ｃ）と、電解質を含む。拡散層
１３、１６はガス透過性を有しカーボン（Ｃ）からな
る。セパレータ１８は、ガス、水不透過性で、導電性を
有する。セパレータ１８は、通常は、カーボン（黒鉛で
ある場合を含む）、または金属（メタル）、または導電
性樹脂、の何れかからなる。The catalyst layers 12 and 15 contain a catalyst such as platinum (Pt), carbon (C), and an electrolyte. The diffusion layers 13 and 16 have gas permeability and are made of carbon (C). The separator 18 is impermeable to gas and water and has conductivity. The separator 18 is usually made of carbon (including the case of graphite), metal (metal), or conductive resin.
【０００９】セパレータ１８は、燃料ガスと酸化ガス、
燃料ガスと冷却水、酸化ガスと冷却水、の何れかを隔て
るとともに、隣り合うセルのアノードからカソードに電
子が流れる電気の通路を形成している。冷却水流路２６
はセル毎に、または複数のセル毎に、設けられる。たと
えば、図２の例では、２セルで１モジュールを構成して
おり、冷却水流路２６が、モジュール毎（２セル毎）に
設けられている。The separator 18 includes a fuel gas and an oxidizing gas,
The fuel gas and cooling water are separated from each other, and the oxidizing gas and cooling water are separated from each other, and an electric passage through which electrons flow from the anode to the cathode of adjacent cells is formed. Cooling water flow path 26
Is provided for each cell or for each of a plurality of cells. For example, in the example of FIG. 2, two cells form one module, and the cooling water flow path 26 is provided for each module (every two cells).
【００１０】セパレータ１８は、通常、四角形状（正方
形、矩形、台形などを含む）か、ほぼ四角形状を有して
いる。ただし、セパレータ１８の形状は四角形に限るも
のではない。セパレータ１８は、発電面（電極がある部
位）にガスを供給するガス流路２７を有している。ＭＥ
Ａの一側のセパレータ１８には、発電面に燃料ガスを供
給する燃料ガス流路２７ａが形成されており、ＭＥＡの
他側のセパレータ１８には、発電面に酸化ガスを供給す
る酸化ガス流路２７ｂが形成されている。ガス流路２７
のパターンは、限定はなく、たとえば、サーペンタイン
であってもよいし、ストレートであってもよいし、溝本
数が流れ方向の途中で変化するものであってもよい。ガ
ス流路２７の溝幅は一定であってもよいし、あるいはガ
ス流れ方向に変化していてもよい。セパレータ１８は、
また、ガス入口２９（燃料ガス入口２９ａ、酸化ガス入
口２９ｂ）、ガス出口３０（燃料ガス出口３０ａ、酸化
ガス出口３０ｂ）、冷媒入口３１、冷媒出口３２を有し
ており、これらの入口、出口は、セル積層方向に連続し
て延びている。The separator 18 usually has a quadrangular shape (including a square, a rectangle, a trapezoid, etc.) or a substantially quadrangular shape. However, the shape of the separator 18 is not limited to the rectangular shape. The separator 18 has a gas flow path 27 that supplies gas to the power generation surface (the portion where the electrodes are located). ME
A fuel gas passage 27a for supplying a fuel gas to the power generation surface is formed in the separator 18 on one side of A, and an oxidizing gas flow for supplying an oxidizing gas to the power generation surface is formed on the other side of the separator 18 on the MEA side. The path 27b is formed. Gas flow path 27
The pattern is not limited and may be, for example, serpentine, straight, or the number of grooves may change in the middle of the flow direction. The groove width of the gas passage 27 may be constant or may change in the gas flow direction. The separator 18 is
Further, it has a gas inlet 29 (fuel gas inlet 29a, oxidizing gas inlet 29b), a gas outlet 30 (fuel gas outlet 30a, oxidizing gas outlet 30b), a refrigerant inlet 31, and a refrigerant outlet 32. These inlets and outlets Extend continuously in the cell stacking direction.
【００１１】セパレータ１８は、燃料電池の発電面にガ
スを供給するガス流路２７の側部に盛り上がった畝（リ
ブ、山といってもよい）２８を有しており、畝２８の頂
面（盛り上がりの頂面）で拡散層１３、１６に接触して
いる。畝２８の頂面と拡散層１３、１６との接触面を通
してセパレータ１８と拡散層１３、１６間に電子が通
る。セパレータ１８は拡散層１３、１６に、スタック２
３の締結力で決まる適切な押し付け力で、押し付けられ
ており、接触電気抵抗が小さくなっている。畝２８は、
ガス流れ方向に連続していてもよいし、あるいは図示を
省略するがガス流れ方向に複数個に分割されていてもよ
いし、あるいは図示を省略するがガス流れ方向と畝の幅
方向の両方向に複数個に分割されていてもよい。The separator 18 has a raised ridge (which may be called a rib or a mountain) 28 on the side of a gas flow path 27 for supplying gas to the power generation surface of the fuel cell, and the top surface of the ridge 28. The diffusion layers 13 and 16 are in contact with each other (the top surface of the protrusion). Electrons pass between the separator 18 and the diffusion layers 13 and 16 through the contact surface between the top surface of the ridge 28 and the diffusion layers 13 and 16. The separator 18 is provided on the diffusion layers 13 and 16 and the stack 2
It is pressed with an appropriate pressing force determined by the fastening force of No. 3, and the contact electric resistance is small. The ridge 28 is
It may be continuous in the gas flow direction, or may be divided into a plurality of parts in the gas flow direction although not shown in the figure, or in both directions of the gas flow direction and the ridge width direction although not shown in the figure. It may be divided into a plurality of pieces.
【００１２】しかし、この押し付けによって、拡散層１
３、１６のうちセパレータ１８の畝２８で押されている
部分へのガスの回り込みは、畝２８によって押されてい
ないガス流路２７の部分よりも悪くなる。また、ガス濃
度は、発電でのガス消費によって、ガス流れ方向に上流
側から下流側に低くなる。そのため、拡散層１３、１６
のうちセパレータ１８の畝２８で押されている部分への
ガスの回り込みも、ガス濃度の低下につれて低下し、ガ
ス流れ方向に上流側から下流側にいくにしたがって悪く
なる。However, due to this pressing, the diffusion layer 1
The gas wraparound to the portion of the separator 16 which is pressed by the ridge 28 of the separators 3 and 16 is worse than that of the portion of the gas passage 27 which is not pressed by the ridge 28. Further, the gas concentration decreases from the upstream side to the downstream side in the gas flow direction due to gas consumption in power generation. Therefore, the diffusion layers 13 and 16
The wraparound of the gas to the portion of the separator 18 pressed by the ridge 28 also decreases as the gas concentration decreases, and becomes worse from the upstream side to the downstream side in the gas flow direction.
【００１３】ガスの回り込み性の悪化を抑制するため
に、畝２８の幅はガス流れ方向に変化されている。燃料
ガス流路２７ａの側部の畝２８の幅は燃料ガス流路２７
ａを流れる燃料ガスの流れ方向に変化しており、酸化ガ
ス流路２７ｂの側部の畝２８の幅は酸化ガス流路２７ｂ
を流れる酸化ガスの流れ方向に変化している。この場
合、畝２８の幅とは、符合Ａで示した隣接するガス流路
２７間距離をいい、畝２８が隣接するガス流路２７間で
畝幅方向に複数個に分割されている場合も隣接するガス
流路２７間距離をいうものとする。畝幅の変化は連続的
でもよいし、あるいは所定の長さ毎に変化させてもよい
（段階状の変化をさせてもよい）。The width of the ridges 28 is changed in the gas flow direction in order to suppress the deterioration of the gas wraparound property. The width of the ridge 28 on the side of the fuel gas passage 27a is
The width of the ridge 28 on the side of the oxidizing gas passage 27b is changed in the flowing direction of the fuel gas flowing through the oxidizing gas passage 27b.
Is changing in the direction of the flow of the oxidizing gas flowing through. In this case, the width of the ridge 28 refers to the distance between the adjacent gas flow passages 27 indicated by the symbol A, and even when the ridge 28 is divided into a plurality of adjacent gas flow passages 27 in the ridge width direction. The distance between the adjacent gas flow paths 27 is referred to. The ridge width may be changed continuously or may be changed for each predetermined length (stepwise change may be made).
【００１４】より詳しくは、畝２８の幅は、ガス流れ方
向上流側から下流側に、連続的または段階的に狭くして
ある。燃料ガス流路２７ａの側部の畝２８の幅は、燃料
ガスの流れ方向に上流側から下流側に、連続的または段
階的に狭くしてあり、酸化ガス流路２７ｂの側部の畝２
８の幅は酸化ガス流路２７ｂの流れ方向に上流側から下
流側に、連続的または段階的に狭くしてある。More specifically, the width of the ridge 28 is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction. The width of the ridge 28 on the side of the fuel gas passage 27a is made narrower continuously or stepwise from the upstream side to the downstream side in the flow direction of the fuel gas, and the ridge 2 on the side of the oxidizing gas passage 27b is formed.
The width of 8 is narrowed continuously or stepwise from the upstream side to the downstream side in the flow direction of the oxidizing gas passage 27b.
【００１５】また、畝幅とガス流路幅との両方を変化さ
せてもよい。詳しくは、畝２８の幅をガス流れ方向上流
側から下流側に連続的または段階的に狭くするととも
に、ガス消費によるガス濃度低下を抑制するために、ガ
ス流路幅もガス流れ方向上流側から下流側に連続的また
は段階的に狭くしてもよい。すなわち、燃料ガス流路２
７ａの側部の畝２８の幅を、燃料ガスの流れ方向に上流
側から下流側に、連続的または段階的に狭くするととも
に、燃料ガス流路幅も燃料ガス流れ方向上流側から下流
側に連続的または段階的に狭くしてもよい。また、酸化
ガス流路２７ｂの側部の畝２８の幅を、酸化ガスの流れ
方向に上流側から下流側に、連続的または段階的に狭く
するとともに、酸化ガス流路幅も酸化ガス流れ方向上流
側から下流側に連続的または段階的に狭くしてもよい。Further, both the ridge width and the gas passage width may be changed. Specifically, the width of the ridge 28 is continuously or stepwise narrowed from the upstream side to the downstream side in the gas flow direction, and the gas flow channel width is also changed from the upstream side in the gas flow direction in order to suppress a decrease in gas concentration due to gas consumption. It may be narrowed continuously or stepwise on the downstream side. That is, the fuel gas flow path 2
The width of the ridge 28 on the side of 7a is continuously or stepwise narrowed from the upstream side to the downstream side in the fuel gas flow direction, and the fuel gas passage width is also changed from the upstream side to the downstream side in the fuel gas flow direction. It may be narrowed continuously or stepwise. In addition, the width of the ridges 28 on the side of the oxidizing gas flow channel 27b is continuously or stepwise narrowed from the upstream side to the downstream side in the oxidizing gas flow direction, and the oxidizing gas flow channel width is also changed in the oxidizing gas flow direction. It may be narrowed continuously or stepwise from the upstream side to the downstream side.
【００１６】また、畝２８の幅Ａをガス流路２７の幅Ｂ
との比Ａ／Ｂで特定することもできる。すなわち、比Ａ
／Ｂをガス流れ方向に変化させてある。ガス流れ方向上
流側から下流側に、比Ａ／Ｂを連続的または段階的に小
さくしてある。また、ガス流れ方向上流側から下流側
に、比Ａ／Ｂを連続的または段階的に小さくするととも
に、ガス流れ方向上流側から下流側に、ガス流路幅を連
続的または段階的に狭くしてもよい。Further, the width A of the ridge 28 is equal to the width B of the gas passage 27.
It can also be specified by the ratio A / B with. That is, the ratio A
/ B is changed in the gas flow direction. The ratio A / B is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction. Further, the ratio A / B is continuously or stepwise reduced from the upstream side to the downstream side in the gas flow direction, and the gas flow channel width is continuously or stepwise narrowed from the upstream side to the downstream side in the gas flow direction. May be.
【００１７】つぎに、実施例１、２の共通構成の作用を
説明する。まず、畝２８の幅をガス流れ方向に変化させ
たので、畝幅を適切に変化させることにより畝幅一定の
場合よりも、畝２８で押されている拡散層部分へのガス
の回り込みをよくすることができ、拡散層１３、１６へ
のガス拡散性が均一化できる。その結果、ガス流路下流
での濃度過電圧を小さくでき、発電効率の低下を抑制で
きる。すなわち、ガス流れ方向上流側から下流側に、畝
幅を連続的または段階的に狭くしたので、畝幅一定の場
合よりも、ガス流路下流での拡散層１３、１６へのガス
拡散性低下を抑制でき、濃度過電圧を小さくでき、発電
効率の低下を抑制できる。また、ガス流れ方向上流側か
ら下流側に、ガス流路２７幅を連続的または段階的に狭
くした場合は、ガスが消費されても下流側でのガス濃度
低下が抑制され、より一層、ガス流路下流での濃度過電
圧を小さくでき、発電効率の低下を抑制できる。Next, the operation of the common configuration of the first and second embodiments will be described. First, since the width of the ridges 28 was changed in the gas flow direction, by appropriately changing the ridge widths, the gas wraps around the diffusion layer portion pressed by the ridges 28 better than when the ridge width is constant. Therefore, the gas diffusivity to the diffusion layers 13 and 16 can be made uniform. As a result, the concentration overvoltage on the downstream side of the gas flow path can be reduced, and a decrease in power generation efficiency can be suppressed. That is, since the ridge width is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction, the gas diffusivity to the diffusion layers 13 and 16 at the downstream side of the gas flow passage is reduced as compared with the case where the ridge width is constant. Can be suppressed, the concentration overvoltage can be reduced, and the decrease in power generation efficiency can be suppressed. In addition, when the width of the gas flow path 27 is continuously or stepwise narrowed from the upstream side to the downstream side in the gas flow direction, even if the gas is consumed, the decrease in the gas concentration on the downstream side is suppressed, and the gas flow rate is further reduced. It is possible to reduce the concentration overvoltage in the downstream side of the flow path, and suppress the decrease in power generation efficiency.
【００１８】畝幅をガス流路幅との比で特定した場合も
上記が成立する。畝２８の幅をＡ、該畝に隣接する部位
のガス流路の幅をＢとしたときに、比Ａ／Ｂを適切に変
化させることにより比Ａ／Ｂ一定の場合よりも、ガス流
路下流での濃度過電圧を小さくでき、発電効率の低下を
抑制できる。すなわち、ガス流れ方向上流側から下流側
に、比Ａ／Ｂを連続的または段階的に小さくしたので、
比Ａ／Ｂ一定の場合よりも、ガス流路下流での濃度過電
圧を小さくでき、発電効率の低下を抑制できる。また、
ガス流れ方向上流側から下流側に、ガス流路２７幅を連
続的または段階的に狭くした場合は、ガスが消費されて
も下流側でのガス濃度低下が抑制され、より一層、ガス
流路下流での濃度過電圧を小さくでき、発電効率の低下
を抑制できる。The above is also true when the ridge width is specified by the ratio to the gas flow channel width. Assuming that the width of the ridge 28 is A and the width of the gas flow passage in a portion adjacent to the ridge is B, the ratio A / B can be changed appropriately so that the ratio of the ratio A / B is constant. It is possible to reduce the concentration overvoltage at the downstream side and suppress the decrease in power generation efficiency. That is, since the ratio A / B is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction,
As compared with the case where the ratio A / B is constant, the concentration overvoltage in the downstream of the gas flow path can be reduced, and the decrease in power generation efficiency can be suppressed. Also,
When the width of the gas flow passage 27 is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction, even if the gas is consumed, the decrease in the gas concentration on the downstream side is suppressed, and the gas flow passage is further improved. It is possible to reduce the concentration overvoltage at the downstream side and suppress the decrease in power generation efficiency.
【００１９】つぎに、本発明の実施例１、２に特有な構
成、作用を説明する。本発明の実施例１では、図３に示
すように、セパレータ１８を矩形または正方形とし、ガ
ス流路パターンをサーペンタインとし、畝２８の幅をガ
ス流れ方向に段階的に小さくしてある。すなわち、畝２
８は、所定長、一定幅で延び、そこで段階状に幅が縮小
することを、複数回繰り返して、ガス入口からガス出口
に至っている。また、ＭＥＡを挟んで、酸化ガスの流れ
方向と燃料ガスの流れ方向を対向流としてあり、生成水
が膜を介してセル内で循環するようにしてあり、ガス入
口側でのドライアップ、ガス出口側でのフラッディング
の発生を抑制してある。ガス流路幅は一定の場合が図３
に示してあるが、下流ほど段階的に溝幅を小さくしても
よい。作用は、実施例１、２に共通する構成の作用と同
じである。Next, the structure and operation peculiar to the first and second embodiments of the present invention will be described. In Example 1 of the present invention, as shown in FIG. 3, the separator 18 is rectangular or square, the gas flow path pattern is serpentine, and the width of the ridge 28 is gradually reduced in the gas flow direction. That is, the ridge 2
In No. 8, a gas is extended from a gas inlet to a gas outlet by repeating a predetermined length and a constant width, and then gradually reducing the width a plurality of times. In addition, the flow direction of the oxidizing gas and the flow direction of the fuel gas are opposed to each other across the MEA, and the produced water is circulated in the cell through the membrane. The occurrence of flooding on the exit side is suppressed. Figure 3 shows the case where the gas channel width is constant.
However, the groove width may be gradually reduced toward the downstream side. The operation is the same as the operation of the configuration common to the first and second embodiments.
【００２０】本発明の実施例２では、図４に示すよう
に、セパレータ１８を台形とし、ガス流路パターンをス
トレートとし、畝２８の幅をガス流れ方向に連続的に小
さくしてある。また、ＭＥＡを挟んで、酸化ガスの流れ
方向と燃料ガスの流れ方向は並行流となる。ガス流路幅
は一定の場合が図４に示してあるが、下流ほど段階的に
溝幅を小さくしてもよい。作用は、実施例１、２に共通
する構成の作用と同じである。In the second embodiment of the present invention, as shown in FIG. 4, the separator 18 is trapezoidal, the gas flow path pattern is straight, and the width of the ridge 28 is continuously reduced in the gas flow direction. Further, the flow direction of the oxidizing gas and the flow direction of the fuel gas are parallel to each other across the MEA. Although the case where the gas channel width is constant is shown in FIG. 4, the groove width may be gradually reduced toward the downstream side. The operation is the same as the operation of the configuration common to the first and second embodiments.
【００２１】[0021]
【発明の効果】請求項１の燃料電池のセパレータによれ
ば、畝の幅をガス流れ方向に変化させたので、畝幅を適
切に変化させることにより畝幅一定の場合よりも、ガス
流路下流での濃度過電圧を小さくでき、発電効率の低下
を抑制できる。請求項２の燃料電池のセパレータによれ
ば、ガス流れ方向上流側から下流側に、畝幅を連続的ま
たは段階的に狭くしたので、畝幅一定の場合よりも、ガ
ス流路下流での濃度過電圧を小さくでき、発電効率の低
下を抑制できる。請求項３の燃料電池のセパレータによ
れば、ガス流れ方向上流側から下流側に、ガス流路幅を
連続的または段階的に狭くしたので、ガスが消費されて
も下流側でのガス濃度低下が抑制され、より一層、ガス
流路下流での濃度過電圧を小さくでき、発電効率の低下
を抑制できる。請求項４の燃料電池のセパレータによれ
ば、畝幅をガス流路幅との比で特定し、畝の幅をＡ、該
畝に隣接する部位のガス流路の幅をＢとしたときに、比
Ａ／Ｂをガス流れ方向に変化させたので、比Ａ／Ｂを適
切に変化させることにより比Ａ／Ｂ一定の場合よりも、
ガス流路下流での濃度過電圧を小さくでき、発電効率の
低下を抑制できる。請求項５の燃料電池のセパレータに
よれば、ガス流れ方向上流側から下流側に、比Ａ／Ｂを
連続的または段階的に小さくしたので、比Ａ／Ｂ一定の
場合よりも、ガス流路下流での濃度過電圧を小さくで
き、発電効率の低下を抑制できる。請求項６の燃料電池
のセパレータによれば、ガス流れ方向上流側から下流側
に、ガス流路幅を連続的または段階的に狭くしたガスが
消費されても下流側でのガス濃度低下が抑制され、より
一層、ガス流路下流での濃度過電圧を小さくでき、発電
効率の低下を抑制できる。According to the separator of the fuel cell of claim 1, since the width of the ridge is changed in the gas flow direction, by appropriately changing the width of the ridge, the gas flow passage can be made smaller than in the case where the width of the ridge is constant. It is possible to reduce the concentration overvoltage at the downstream side and suppress the decrease in power generation efficiency. According to the separator of the fuel cell of claim 2, since the ridge width is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction, the concentration in the downstream of the gas flow channel is smaller than in the case where the ridge width is constant. The overvoltage can be reduced, and the decrease in power generation efficiency can be suppressed. According to the separator of the fuel cell of claim 3, since the gas flow passage width is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction, even if the gas is consumed, the gas concentration in the downstream side is reduced. Is suppressed, the concentration overvoltage in the downstream of the gas flow path can be further reduced, and the decrease in power generation efficiency can be suppressed. According to the separator of the fuel cell of claim 4, when the ridge width is specified by the ratio to the gas flow channel width, and the ridge width is A and the gas flow channel width of a portion adjacent to the ridge is B. Since the ratio A / B is changed in the gas flow direction, by appropriately changing the ratio A / B, the
It is possible to reduce the concentration overvoltage in the downstream of the gas flow path and suppress the decrease in power generation efficiency. According to the separator of the fuel cell of claim 5, the ratio A / B is continuously or stepwise reduced from the upstream side to the downstream side in the gas flow direction. It is possible to reduce the concentration overvoltage at the downstream side and suppress the decrease in power generation efficiency. According to the separator of the fuel cell of claim 6, even if the gas in which the gas flow channel width is narrowed continuously or stepwise is consumed from the upstream side to the downstream side in the gas flow direction, the decrease in gas concentration on the downstream side is suppressed. As a result, the concentration overvoltage on the downstream side of the gas flow path can be further reduced, and the decrease in power generation efficiency can be suppressed.
【図１】本発明の燃料電池用セパレータを備えた燃料電
池の側面図である。FIG. 1 is a side view of a fuel cell including a fuel cell separator of the present invention.
【図２】図１の燃料電池のモジュールの端部とその近傍
の断面図である。2 is a cross-sectional view of an end portion of the fuel cell module of FIG. 1 and its vicinity.
【図３】本発明の実施例１の燃料電池のセパレータの正
面図（酸化ガス流路側）である。FIG. 3 is a front view (oxidizing gas flow path side) of the separator of the fuel cell according to the first embodiment of the present invention.
【図４】本発明の実施例２の燃料電池のセパレータの正
面図（酸化ガス流路側）である。FIG. 4 is a front view (oxidizing gas flow path side) of a separator of a fuel cell according to a second embodiment of the present invention.
１０ （固体高分子電解質型）燃料電池 １１ 電解質膜 １２ 触媒層 １３ 拡散層 １４ 電極（アノード） １５ 触媒層 １６ 拡散層 １７ 電極（カソード） １８ セパレータ １９ モジュール ２０ ターミナル ２１ インシュレータ ２２ エンドプレート ２３ スタック ２４ 締結部材（テンションプレート） ２５ ボルトまたはナット ２６ 冷却水流路 ２７ ガス流路（発電部のガス流路） ２７ａ 燃料ガス流路 ２７ｂ 酸化ガス流路 ２８ 畝（リブ、山） ２９ ガス入口 ２９ａ 燃料ガス入口 ２９ｂ 酸化ガス入口 ３０ ガス出口 ３０ａ 燃料ガス出口 ３０ｂ 酸化ガス出口 ３１ 冷媒入口 ３２ 冷媒出口 10 (Polymer electrolyte type) fuel cell 11 Electrolyte membrane 12 Catalyst layer 13 Diffusion layer 14 electrodes (anode) 15 Catalyst layer 16 diffusion layer 17 electrodes (cathode) 18 separator 19 modules 20 terminals 21 insulator 22 End plate 23 stack 24 Fastening member (tension plate) 25 bolts or nuts 26 Cooling water flow path 27 gas flow path (gas flow path of power generation section) 27a Fuel gas flow path 27b Oxidizing gas flow path 28 ridges (ribs, mountains) 29 gas inlet 29a Fuel gas inlet 29b Oxidizing gas inlet 30 gas outlet 30a Fuel gas outlet 30b Oxidizing gas outlet 31 Refrigerant inlet 32 Refrigerant outlet
Claims (6)
流路と、該ガス流路の側部で盛り上がり頂面で拡散層に
接触する畝とを有する燃料電池のセパレータであって、
前記畝の幅をガス流れ方向に変化させた燃料電池のセパ
レータ。1. A separator for a fuel cell, comprising a gas flow path for supplying gas to a power generation surface of the fuel cell, and a ridge that rises at a side portion of the gas flow path and contacts a diffusion layer at a top surface thereof.
A fuel cell separator in which the width of the ridge is changed in the gas flow direction.
を連続的または段階的に狭くした請求項１記載の燃料電
池のセパレータ。2. The fuel cell separator according to claim 1, wherein the ridge width is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction.
流路幅を連続的または段階的に狭くした請求項２記載の
燃料電池のセパレータ。3. The fuel cell separator according to claim 2, wherein the gas flow channel width is narrowed continuously or stepwise from the upstream side to the downstream side in the gas flow direction.
流路と、該ガス流路の側部で盛り上がり頂面で拡散層に
接触する畝とを有する燃料電池のセパレータであって、
畝の幅をＡ、該畝に隣接する部位のガス流路の幅をＢと
したときに、比Ａ／Ｂをガス流れ方向に変化させた燃料
電池のセパレータ。4. A fuel cell separator having a gas flow path for supplying gas to the power generation surface of the fuel cell, and a ridge that rises on the side of the gas flow path and contacts the diffusion layer on the top surface,
A fuel cell separator in which the ratio A / B is changed in the gas flow direction, where A is the width of the ridge and B is the width of the gas flow path in the region adjacent to the ridge.
／Ｂを連続的または段階的に小さくした請求項４記載の
燃料電池のセパレータ。5. The ratio A from the upstream side to the downstream side in the gas flow direction.
The fuel cell separator according to claim 4, wherein / B is reduced continuously or stepwise.
流路幅を連続的または段階的に狭くした請求項５記載の
燃料電池のセパレータ。6. The fuel cell separator according to claim 5, wherein the gas flow channel width is reduced continuously or stepwise from the upstream side to the downstream side in the gas flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002008341A JP2003217615A (en) | 2002-01-17 | 2002-01-17 | Fuel cell separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002008341A JP2003217615A (en) | 2002-01-17 | 2002-01-17 | Fuel cell separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003217615A true JP2003217615A (en) | 2003-07-31 |
Family
ID=27646632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002008341A Pending JP2003217615A (en) | 2002-01-17 | 2002-01-17 | Fuel cell separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003217615A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005268110A (en) * | 2004-03-19 | 2005-09-29 | Mitsubishi Electric Corp | Fuel cell separator |
| JP2007504601A (en) * | 2003-08-29 | 2007-03-01 | ツェントゥルム フューア ゾンネンエネルギー−ウント ヴァッサーシュトッフ−フォルシュング バーデン−ヴァルテムベルク ゲマインニュッツィヒ シュティフトゥング | Gas supply panel for fuel cell and fuel cell having gas supply panel |
| JP2007533071A (en) * | 2004-04-08 | 2007-11-15 | インテリジェント エナジー リミテッド | Fuel cell gas distribution |
| JP2008034251A (en) * | 2006-07-28 | 2008-02-14 | Toyota Motor Corp | Fuel cell |
| WO2008126358A1 (en) * | 2007-03-15 | 2008-10-23 | Panasonic Corporation | Polymer electrolyte fuel cell and fuel cell stack having the same |
| US20100028752A1 (en) * | 2006-10-13 | 2010-02-04 | Ulrich Kattner | Carrying Container For a Power Supply Unit With Fuel Cells |
| JP2011528159A (en) * | 2008-07-15 | 2011-11-10 | ダイムラー・アクチェンゲゼルシャフト | Bipolar plate for fuel cell structure, especially for placement between two adjacent membrane electrode structures |
| EP2680354A1 (en) * | 2011-02-21 | 2014-01-01 | Toyota Jidosha Kabushiki Kaisha | Fuel cell |
-
2002
- 2002-01-17 JP JP2002008341A patent/JP2003217615A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007504601A (en) * | 2003-08-29 | 2007-03-01 | ツェントゥルム フューア ゾンネンエネルギー−ウント ヴァッサーシュトッフ−フォルシュング バーデン−ヴァルテムベルク ゲマインニュッツィヒ シュティフトゥング | Gas supply panel for fuel cell and fuel cell having gas supply panel |
| JP2005268110A (en) * | 2004-03-19 | 2005-09-29 | Mitsubishi Electric Corp | Fuel cell separator |
| US8323846B2 (en) | 2004-04-08 | 2012-12-04 | Intelligent Energy Limited | Fuel cell gas distribution |
| JP2007533071A (en) * | 2004-04-08 | 2007-11-15 | インテリジェント エナジー リミテッド | Fuel cell gas distribution |
| JP2008034251A (en) * | 2006-07-28 | 2008-02-14 | Toyota Motor Corp | Fuel cell |
| US9099728B2 (en) * | 2006-10-13 | 2015-08-04 | Heliocentris Fuel Cell Solutions Gmbh | Carrying container for a power supply unit with fuel cells |
| US20100028752A1 (en) * | 2006-10-13 | 2010-02-04 | Ulrich Kattner | Carrying Container For a Power Supply Unit With Fuel Cells |
| JP4469415B2 (en) * | 2007-03-15 | 2010-05-26 | パナソニック株式会社 | POLYMER ELECTROLYTE FUEL CELL AND FUEL CELL STACK HAVING THE SAME |
| US8309273B2 (en) | 2007-03-15 | 2012-11-13 | Panasonic Corporation | Polymer electrolyte fuel cell and fuel cell stack including the same |
| JPWO2008126358A1 (en) * | 2007-03-15 | 2010-07-22 | パナソニック株式会社 | POLYMER ELECTROLYTE FUEL CELL AND FUEL CELL STACK HAVING THE SAME |
| WO2008126358A1 (en) * | 2007-03-15 | 2008-10-23 | Panasonic Corporation | Polymer electrolyte fuel cell and fuel cell stack having the same |
| JP2011528159A (en) * | 2008-07-15 | 2011-11-10 | ダイムラー・アクチェンゲゼルシャフト | Bipolar plate for fuel cell structure, especially for placement between two adjacent membrane electrode structures |
| EP2680354A1 (en) * | 2011-02-21 | 2014-01-01 | Toyota Jidosha Kabushiki Kaisha | Fuel cell |
| EP2680354A4 (en) * | 2011-02-21 | 2014-10-01 | Toyota Motor Co Ltd | FUEL CELL |
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