JP4874519B2 - 燃料電池用プレート - Google Patents
燃料電池用プレート Download PDFInfo
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- JP4874519B2 JP4874519B2 JP2003529563A JP2003529563A JP4874519B2 JP 4874519 B2 JP4874519 B2 JP 4874519B2 JP 2003529563 A JP2003529563 A JP 2003529563A JP 2003529563 A JP2003529563 A JP 2003529563A JP 4874519 B2 JP4874519 B2 JP 4874519B2
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- flow field
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Inert Electrodes (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
「流れ場」とは、標的部域へおよびそこからの流体の進入および退出を可能にする流体分配システムの1構成要素の形で実施された1以上の流路のパターンを意味する。
「標的部域」とは、電気化学装置の電気化学的に活性な電極部域といったような、流体分配システムにより供給される少なくとも2次元の有意な広がりをもつ部域を意味する。
「活動部域」とは、標的部域の上に重なって存在するとともに標的部域を補助する流れ場の部域を意味する。
「活性成分」とは、例えば空気中に存在する酸素、改質油気体混合物中に存在する水素などの、標的部域でまたは標的部域と併せて用いるべき流体の1成分を意味する。
「活性特性」とは、例えば冷却材の熱エネルギー含有量、溶剤の溶媒和能力などの、標的部域でまたは標的部域と併せて用いるべき流体の特性を意味する。
「蛇行」とは、流れ方向の方向性といったような方向性が交番しかつ方向転換点で遭遇するかまたは方向転換セグメントにより連結される連続して連結された主要セグメントを含んで成る流れ場内の1流路のパターンといったようなパターンを意味する。
「ランド」または「ランド部域」とは、流れ場の流路または流路の一部分の間の部域を意味する。
「主要セグメント」とは、方向転換点でまたは比較的短かい方向転換セグメントを通して直接先行または後続する主要セグメントに連結されている、直接先行または後続する主要セグメントの幾何学的方向性とは全く異なる幾何学的方向性をもつ、流れ場内の1流路のパターンといったような、1パターンの1セグメントを意味する。
「流束」とは、kg/秒/m2の単位を表わすことのできる気体または液体といったような流体の輸送、またはkg/秒/m2単位で表わすことのできる一定の与えられた部域を通しての空気中に存在する酸素といった流体の1成分の輸送、または例えばワット/m2の単位で表わすことのできる熱エネルギーといったような流体の特性の輸送を意味する。
「流量」とは、気体または液体といったような流体の輸送または例えば空気中に存在する酸素といった流体の1成分の輸送を意味し、単位時間あたり質量単位(例えばkg/秒)または単位時間あたりの標準条件下での体積(例えば分あたりの標準立方センチメートル(sccm)または分あたりの標準リットル(slm))で表わすことができる。
「流体輸送層」とは、流体輸送を可能にする層、標準的には、多孔質のまたはその他の形で流体透過性の構造的材料の層のみならず、機械的に維持された空隙を内含する層も意味する。
流れ場と共に使用される流体輸送層の「ランド上部分」は、流れ場流路全体にわたる流体輸送層の部分または流れ場の活動部域上を通過しない部分を除外した流れ場の活動部域内部でランド部域上を通過する流体輸送層の部分である。
流体輸送層といったような層を介した流体の「側方流束」とは、層の平面に対し直交する流束でありうる層内へ向かうまたは層外へ向かう流束とは区別される、層内部にある、一般的には層の平面内部の流束を意味する;
「流れ場装置」とは、流れ場を有する流体分配システムの1構成要素、標準的には、i)流れ場プレートまたは ii)中にスタンピング、成形またはカットされた流れ場のパターンを保持するべく充分頑丈なものである流体輸送層のいずれかであるものの、より標準的には流れ場プレートであり、標準的には多孔質またはより標準的には非多孔質の材料で作製され好ましくは導電性材料で作製されているバイポーラプレートである、電気化学電池内の流体分布システムの一構成要素を意味する。
各々幅0.8mmで深さ1.0mmで2.0mmの離隔距離(ランド幅)をもつ25の平行なセグメント(24のループを形成する)から成る、50cm2の活動部域の燃料電池のための平行な隣接したセグメントで構成された単一の蛇行流路を有する比較用流れ場のためのCFDモデルを構築した。この流れ場が122ミクロン(4.8ミル)の厚みおよびK=12×10-12m2という面内浸透率をもつDCCと密に接触するCFDモデルを構築した。このKの値は、動作中の燃料電池内のDCCについての標準値を代表するように選択された。800sccmの空気流量および酸素消費無しのケースについて、CFDモデル計算を行なった。
実施例2〜4では、流路の任意の与えられたループが図2に定義されているような半頂角θを有するような形で、蛇行した流れ場の隣接する流路セグメントが互いとの関係においてわずかに角度を成している本発明による流れ場のためのCFDモデリングを構築した。実施例1に適切に匹敵する状態にとどまるように、実施例2の流れ場は同様に、各々幅0.8mm×深さ1.0mmの25の流路セグメントで構成されていた。活動部域は50cm2で、全体的流路長は実施例1のものとほぼ同じであった。25本の流路は長さ71mmで幅0.8mmであることから、これらは、50cm2の活動部域の28.4%にあたる14.2cm2をカバーし、71.6%のランド部域を残す。厚み122ミクロン(4.8ミル)、面内浸透率K=12×10-12m2である同じDCCを使用した。合計空気質量流量は800sccmであった。
実施例5Cでは、平行な隣接する流路から成る単一の蛇行流路をもつ実施例1Cの比較用流れ場のためのCFDモデルを、2.0という化学量論的流量比ηでモデルに対し酸素消費が付加されるという修正を加えた上でランさせた。化学量論的流量比は、消費された酸素に供給された酸素の比である。図7は、主としてY方向である。結果として得た面内酸素流束を描いている。
図9で定義した通りの半頂角θが入口の1.75度から出口の0.80度まで漸進的に狭くなっているという点で異なっているものの2.0という化学量論的流量比(η)での酸素消費を含めて実施例6に類似した流れ場のためのCFDモデルを構築した。ランドの小さな端部は、0.4mmで固定され、一方大きい端部は4.8mmから2.4mmまでで変動している。平均的な大きい端部が3.6mmであり実施例2と整合し、流路セグメントの数も25であり同じく実施例2と整合するという点に留意されたい。この「漸進的ジグザグ」流れ場は同様に各々幅0.8mm×深さ1.0mmの流路セグメントを含み、50cm2の活動部域を形成し、流路長全体およびランド部域は実施例2とほぼ同じであった。122ミクロン(4.8ミル)の厚みおよびK=12×10-12m2の面内浸透率および800sccmの合計空気質量流量を有する同じDCCを使用した。
Claims (1)
- 燃料電池において使用されるプレートであって、活性成分を含む流体を流すための、複数のループからなる1つの蛇行流路を有し、前記複数のループの各々は台形形状を有し、各ループの2つの斜辺によって画定される前記蛇行流路の頂角が該蛇行流路の出口に近づくにつれて漸進的に狭くなっている、プレート。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/954,601 US6780536B2 (en) | 2001-09-17 | 2001-09-17 | Flow field |
US09/954,601 | 2001-09-17 | ||
PCT/US2002/025424 WO2003026053A1 (en) | 2001-09-17 | 2002-08-12 | Flow field |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005503654A JP2005503654A (ja) | 2005-02-03 |
JP2005503654A5 JP2005503654A5 (ja) | 2006-01-05 |
JP4874519B2 true JP4874519B2 (ja) | 2012-02-15 |
Family
ID=25495671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003529563A Expired - Fee Related JP4874519B2 (ja) | 2001-09-17 | 2002-08-12 | 燃料電池用プレート |
Country Status (8)
Country | Link |
---|---|
US (1) | US6780536B2 (ja) |
EP (1) | EP1428279B1 (ja) |
JP (1) | JP4874519B2 (ja) |
KR (1) | KR20040033053A (ja) |
AT (1) | ATE395721T1 (ja) |
CA (1) | CA2460563A1 (ja) |
DE (1) | DE60226624D1 (ja) |
WO (1) | WO2003026053A1 (ja) |
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- 2002-08-12 WO PCT/US2002/025424 patent/WO2003026053A1/en active Application Filing
- 2002-08-12 DE DE60226624T patent/DE60226624D1/de not_active Expired - Lifetime
- 2002-08-12 AT AT02761318T patent/ATE395721T1/de not_active IP Right Cessation
- 2002-08-12 CA CA002460563A patent/CA2460563A1/en not_active Abandoned
- 2002-08-12 KR KR10-2004-7003855A patent/KR20040033053A/ko not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
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CA2460563A1 (en) | 2003-03-27 |
EP1428279A1 (en) | 2004-06-16 |
WO2003026053A1 (en) | 2003-03-27 |
ATE395721T1 (de) | 2008-05-15 |
JP2005503654A (ja) | 2005-02-03 |
EP1428279B1 (en) | 2008-05-14 |
KR20040033053A (ko) | 2004-04-17 |
DE60226624D1 (de) | 2008-06-26 |
US20030059662A1 (en) | 2003-03-27 |
US6780536B2 (en) | 2004-08-24 |
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