JPH0758620B2 - Fuel cell - Google Patents
Fuel cellInfo
- Publication number
- JPH0758620B2 JPH0758620B2 JP1206141A JP20614189A JPH0758620B2 JP H0758620 B2 JPH0758620 B2 JP H0758620B2 JP 1206141 A JP1206141 A JP 1206141A JP 20614189 A JP20614189 A JP 20614189A JP H0758620 B2 JPH0758620 B2 JP H0758620B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel cell
- gas
- shim
- impregnated
- outer region
- 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.)
- Expired - Fee Related
Links
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)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は燃料電池に係り、特に積層シール面に用いるシ
ム構成に関するものである。TECHNICAL FIELD The present invention relates to a fuel cell, and more particularly to a shim structure used for a laminated sealing surface.
（ロ）従来の技術 一般にセル（１）と交互に積重されて電池スタック
（Ｓ）を構成する炭素質ガス分離板（２）は、その表裏
各面に互に交錯する方向の両側シール面（３）及び
（４）と各反応ガス（燃料ガス及び空気）の供給溝
（５）及び（６）とを有する。スタック（Ｓ）の各ガス
極（燃料極及び空気極）（Ｎ）（Ｐ）は、ガス分離板
（２）の対応ガス供給溝（５）及び（６）を夫々覆うよ
う取付けられ、これらガス極（Ｎ）（Ｐ）間に電解質マ
トリックス（Ｍ）を介在させて各ガス分離板を積重す
る。(B) Conventional technology Generally, the carbonaceous gas separation plates (2) which are alternately stacked with the cells (1) to form the battery stack (S) have sealing surfaces on both sides in a direction intersecting with each other on the front and back surfaces thereof. It has (3) and (4) and supply grooves (5) and (6) for each reaction gas (fuel gas and air). Each gas electrode (fuel electrode and air electrode) (N) (P) of the stack (S) is attached so as to cover the corresponding gas supply grooves (5) and (6) of the gas separation plate (2), respectively. The gas separation plates are stacked with the electrolyte matrix (M) interposed between the electrodes (N) and (P).
この場合両側シール面（３）及び（４）に夫々貼付けた
シム（７）及び（８）は夫々マトリックス（Ｍ）と一方
のガス極（Ｎ）及び（Ｐ）の各周辺部を挟持してシール
部を構成する。In this case, the shims (7) and (8) attached to the sealing surfaces (3) and (4) on both sides sandwich the matrix (M) and the peripheral portions of one gas electrode (N) and (P), respectively. It constitutes a seal part.
このようなシムは、弾力性・柔軟性・気密性をもつ材質
であることが必要であり、例えば特開昭59−205163号公
報に示されるようなフッ素樹脂製スポンジ状シートが提
案されている。しかしこのシムは多孔質であって電池ス
タック（Ｓ）締付け時の圧縮力でも完全なシールを行う
ことができず、ガスリークを引き起すおそれがあった。Such a shim needs to be made of a material having elasticity, flexibility, and airtightness. For example, a fluororesin sponge sheet as disclosed in JP-A-59-205163 has been proposed. . However, this shim was porous and could not be completely sealed even by the compressive force when the battery stack (S) was tightened, which could cause a gas leak.
（ハ）発明が解決しようとする課題 本発明は弾力性・柔軟性は勿論気密性に優れたシムを比
較的安価に提供し、前記問題点を解消するものである。(C) Problem to be Solved by the Invention The present invention provides a shim having excellent elasticity and flexibility as well as airtightness at a relatively low cost, and solves the above-mentioned problems.
（ニ）課題を解決するための手段 本発明は正負ガス極間に電解質マトリックスを介在させ
たセルと、ガス分離板とを交互に積重してなる燃料電池
において、前記各ガス分離板の周辺シール面に貼付けた
シムが、フッ素樹脂製多孔質シートを母体とし、前記シ
ートの長手方向に予め隔離帯を形成して内外領域に分割
し、前記外領域にパーフルオロポリエーテル油を、前記
内領域にリン酸を夫々含浸して構成されたものである。(D) Means for Solving the Problems The present invention relates to a fuel cell in which cells having an electrolyte matrix interposed between positive and negative gas electrodes and gas separation plates are alternately stacked, and the periphery of each gas separation plate is provided. The shim attached to the sealing surface is made of a fluororesin porous sheet as a base material, and is divided into inner and outer regions by forming an isolation band in the longitudinal direction of the sheet in advance, and perfluoropolyether oil is added to the outer region as described above. It is configured by impregnating each region with phosphoric acid.
（ホ）作用 本発明では、多孔質シートがパーフルオロポリエーテル
油を含浸した外領域とリン酸を含浸した内領域とに区分
されてシムを構成しているので、弾力性・柔軟性を損う
ことなく気密性良好となってシール性を向上することが
できると共に高価なパーフルオロポリエーテル油の使用
量を削減するとが可能となる。特にパーフルオロポリエ
ーテル油はりん酸型燃料電池の作動温度において蒸発量
が極めて少く、長期にわたって安定なシール性を維持す
ることができる。(E) Action In the present invention, since the porous sheet is divided into an outer region impregnated with perfluoropolyether oil and an inner region impregnated with phosphoric acid to form a shim, elasticity and flexibility are impaired. The airtightness can be improved without improving the sealing property, and the amount of expensive perfluoropolyether oil used can be reduced. In particular, perfluoropolyether oil has a very small amount of evaporation at the operating temperature of a phosphoric acid fuel cell, and can maintain stable sealing properties for a long period of time.
（ヘ）実施例 以下本発明によるシム（７）（８）の作成例を説明す
る。(F) Example An example of making shims (7) and (8) according to the present invention will be described below.
シム母体は、フッ素樹脂粉末をフイブリル化してシート
化後除去される炭素水素アンモニウム粉末を予め混合す
ることにより得られるスポンジ状シートを用いる（例え
ば特開昭59−205163号公報参照）。As the shim base, a sponge-like sheet obtained by previously mixing a fluorinated resin powder into a fibril, and ammonium hydrogencarbonate powder which is removed after forming into a sheet is used (see, for example, JP-A-59-205163).
このシートは先づ第３図に示すよう長手方向にフッ素ゴ
ム塗料を塗布含浸して巾約1.5mmの細い隔離帯（Ａ）が
形成され、この隔離帯（Ａ）により巾の広い内領域
（Ｂ）と巾の狭い外領域（Ｃ）に分割される。ついで内
領域（Ｂ）にはリン酸を含浸するが、含浸性を良くする
ためアルコールで処理後水で置換し、水を除去後リン酸
で置換する。一方外領域（Ｃ）には、平均分子量8400の
パーフルオロポリエーテル油（ダイキン工業製商品名デ
ムナム）をそのまゝ含浸する。As shown in FIG. 3, this sheet is first coated with fluororubber paint in the longitudinal direction to impregnate it to form a thin isolation band (A) with a width of about 1.5 mm. B) and a narrow outer region (C). Next, the inner region (B) is impregnated with phosphoric acid. To improve the impregnation property, it is treated with alcohol and then replaced with water, and after removing water, it is replaced with phosphoric acid. On the other hand, the outer region (C) is so impregnated with perfluoropolyether oil having an average molecular weight of 8400 (trade name: Demnum manufactured by Daikin Industries, Ltd.).
このようにして作成されたシム（７）（８）は第１図・
第２図に示すようガス分離板（２）のシール面（３）
（４）に夫々組込まれる。この場合高温において耐蒸発
性に優れたパーフルオロポリエーテル油を含浸した各外
領域（Ｃ）がスタック（Ｓ）の外周に位置する。The shims (7) and (8) created in this way are shown in FIG.
The sealing surface (3) of the gas separating plate (2) as shown in FIG.
They are incorporated in (4) respectively. In this case, each outer region (C) impregnated with perfluoropolyether oil having excellent evaporation resistance at high temperature is located on the outer periphery of the stack (S).
尚隔離帯（Ａ）として第４図に示すよう、巾約1.5mmの
断続的なスリット（Ａ′）を打抜形成後、隣接スリット
間に前記と同様フッ素系ゴム塗料を塗布含浸してもよ
い。Incidentally, as shown in FIG. 4 as the isolation zone (A), after forming the intermittent slit (A ') having a width of about 1.5 mm by punching, the fluorine-based rubber paint is applied and impregnated between the adjacent slits as described above. Good.
（ト）発明の効果 本発明によれば、燃料電池の積重シール面に用いるシム
として、フッ素樹脂製のスポンジ状シートを母体とし、
このシートの長手方向に予め細い隔離帯を形成して内外
領域に分割し、内領域にはリン酸を、外領域にはパーフ
ルオロポリエーテル油を夫々含浸したものであるから、
シムの弾力性・柔軟性を損うことなく気密性良好とな
り、積重シール部のシール性を向上しうると共に高価な
パーフルオロポリエーテル油の使用量を削減することが
可能となる。(G) Effect of the Invention According to the present invention, as a shim used for the stacking seal surface of the fuel cell, a sponge sheet made of fluororesin is used as a base material,
Since a thin isolation band is formed in advance in the longitudinal direction of this sheet and divided into inner and outer regions, phosphoric acid is impregnated in the inner region and perfluoropolyether oil is impregnated in the outer region.
The airtightness is improved without impairing the elasticity and flexibility of the shim, the sealability of the stacking seal portion can be improved, and the amount of expensive perfluoropolyether oil can be reduced.
更に隔離帯により内外領域の含浸剤が混合するおそれも
なく、特に外領域のパーフルオロポリエーテル油がリン
酸燃料電池の作動温度において耐蒸発性にすぐれ長期に
わたりガスリークを抑制して安定なシール性を維持し、
電池の効率、信頼性の向上と超寿命化を達成することが
できる。Furthermore, there is no risk of the impregnating agent in the inner and outer regions being mixed due to the isolation zone, and in particular, the perfluoropolyether oil in the outer region has excellent evaporation resistance at the operating temperature of the phosphoric acid fuel cell and suppresses gas leakage for a long period of time to provide stable sealing performance. Maintain
The efficiency and reliability of the battery can be improved and the service life can be extended.
第１図は本発明の対象とする電池の一部斜面図、第２図
は同上の要部断面図、第３図は本発明によるシムの要部
拡大図、第４図は同上他実施例の要部拡大図である。 S:電池スタック、1:セル、2:ガス分離板、3,4:シール
面、5,6:各反応ガス溝、7,8:シム、N:燃料ガス極、P:空
気極、M:電解質マトリックス、A:隔離帯、B:内領域、C:
外領域。FIG. 1 is a partial oblique view of a battery to which the present invention is directed, FIG. 2 is a sectional view of the essential part of the same as above, FIG. 3 is an enlarged view of the essential part of a shim according to the present invention, and FIG. FIG. S: Battery stack, 1: Cell, 2: Gas separation plate, 3,4: Sealing surface, 5,6: Reactive gas groove, 7,8: Shim, N: Fuel gas electrode, P: Air electrode, M: Electrolyte matrix, A: isolation band, B: inner region, C:
Outside area.
Claims (2)
させたセルと、両面に各反応ガスの供給溝を形設したガ
ス分離板とを交互に積重してなる燃料電池において、前
記各ガス分離板の周辺シール面に貼付けたシムが、フッ
素樹脂製の多孔質シートを母体とし、前記シートの長手
方向に予め隔離帯を形成して、内外領域に分離し、前記
外領域にパーフルオロポリエーテル油を、前記内領域に
リン酸を夫々含浸して構成されたことを特徴とする燃料
電池。1. A fuel cell in which a cell in which an electrolyte matrix is interposed between positive and negative gas electrodes and a gas separation plate in which supply grooves for the respective reaction gases are formed on both sides are alternately stacked. A shim attached to the peripheral sealing surface of the separating plate has a porous sheet made of a fluororesin as a base material, and preliminarily forms an isolation band in the longitudinal direction of the sheet to separate the inner and outer regions, and the perfluoropolyene in the outer region. A fuel cell, characterized in that each of the inner regions is impregnated with ether oil and phosphoric acid.
いことを特徴とする請求項１記載の燃料電池。2. The fuel cell according to claim 1, wherein the width of the outer region is narrower than the width of the inner region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1206141A JPH0758620B2 (en) | 1989-08-09 | 1989-08-09 | Fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1206141A JPH0758620B2 (en) | 1989-08-09 | 1989-08-09 | Fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0371562A JPH0371562A (en) | 1991-03-27 |
| JPH0758620B2 true JPH0758620B2 (en) | 1995-06-21 |
Family
ID=16518470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1206141A Expired - Fee Related JPH0758620B2 (en) | 1989-08-09 | 1989-08-09 | Fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0758620B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101307872B1 (en) * | 2011-04-14 | 2013-09-12 | 한국에너지기술연구원 | Efficiency test device for fuel cell |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2241756A1 (en) * | 1996-03-13 | 1997-09-18 | W.L. Gore & Associates Gmbh | Gasket with corrosion inhibitor |
| EP1075034B1 (en) * | 1998-04-14 | 2011-10-26 | Three Bond Co., Ltd. | Sealing material for fuel cell |
-
1989
- 1989-08-09 JP JP1206141A patent/JPH0758620B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101307872B1 (en) * | 2011-04-14 | 2013-09-12 | 한국에너지기술연구원 | Efficiency test device for fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0371562A (en) | 1991-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |