JPH07263013A - Fuel cell - Google Patents
Fuel cellInfo
- Publication number
- JPH07263013A JPH07263013A JP6076474A JP7647494A JPH07263013A JP H07263013 A JPH07263013 A JP H07263013A JP 6076474 A JP6076474 A JP 6076474A JP 7647494 A JP7647494 A JP 7647494A JP H07263013 A JPH07263013 A JP H07263013A
- Authority
- JP
- Japan
- Prior art keywords
- fuel cell
- plates
- plate
- separator
- interposed
- 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
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内部マニホールドを有
する集合電池からなる燃料電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell including an assembled cell having an internal manifold.
【０００２】[0002]
【従来の技術】従来、この種の燃料電池は、例えば図５
〜図７に示すように、高分子電解質膜31を介在させた空
気電極（陽極）32と燃料電極（陰極）33とを、両面に方
向が90度異なる多数のガス供給溝を34、35を有するセパ
レータ板（バイポーラ板）36により挟持し、かつ空気や
燃料ガスを供給する内部マニホールド37、38を設けて単
電池（セル）39とし、この単電池39を直列に複数個積み
重ねた集合電池その両端のセパレータ板36との間に集電
板40を介在させた連結プレート41により締め付けボルト
42を介して締め付けて構成されている。なお、両電極は
32、33はそれぞれ適当な触媒を担持させた多孔質のもの
であり、又、集合電池の両端のセパレータ板36は、片面
のみにガス供給溝34、35を有するエンドプレートとされ
ており、更に、集電板40は、金めっき付きの銅板からな
るものである。図６、図７において、42、43は内部マニ
ホールド37を囲んで高分子電解質膜31とセパレータ板36
との間、セパレータ板36と集電板40との間に介装された
Ｏリングである。2. Description of the Related Art Conventionally, a fuel cell of this type is shown in FIG.
As shown in FIG. 7, an air electrode (anode) 32 and a fuel electrode (cathode) 33 with a polymer electrolyte membrane 31 interposed between them are provided with a large number of gas supply grooves 34, 35 whose directions differ by 90 degrees. A unit battery (cell) 39 sandwiched between separator plates (bipolar plates) 36 and provided with internal manifolds 37, 38 for supplying air and fuel gas, and an assembled battery in which a plurality of the unit cells 39 are stacked in series. Tightening bolts by connecting plates 41 with collector plates 40 interposed between the separator plates 36 at both ends
It is configured by tightening through 42. Both electrodes are
Reference numerals 32 and 33 are porous ones each carrying an appropriate catalyst, and the separator plates 36 at both ends of the assembled battery are end plates having gas supply grooves 34 and 35 on only one surface. The current collector plate 40 is made of a gold-plated copper plate. 6 and 7, reference numerals 42 and 43 surround the inner manifold 37 and the polymer electrolyte membrane 31 and the separator plate 36.
Is an O-ring interposed between the separator plate 36 and the collector plate 40.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
燃料電池では、エンドプレート及び集電板の表面が凹凸
があるので、両者の接触が不十分となってガス漏れと電
圧降下を生じる不具合がある。又、集合電極を燃料電池
として組み込んだ後においても、使用時の発熱による熱
膨脹若しくは熱収縮のため、同様な不具合を生ずる。そ
こで、本発明は、エンドプレートと集電板との間のガス
シールと導電性を共に良好とし得る燃料電池の提供を目
的とする。However, in the conventional fuel cell, since the surfaces of the end plate and the current collector plate are uneven, there is a problem that the contact between them is insufficient and gas leakage and voltage drop occur. . Even after the assembled electrode is assembled as a fuel cell, similar problems occur due to thermal expansion or contraction due to heat generation during use. Therefore, an object of the present invention is to provide a fuel cell in which both the gas seal between the end plate and the current collector and the conductivity can be improved.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するた
め、本発明の第１の燃料電池は、電解質膜を介在させた
空気電極と燃料電極とをガス供給溝を有するセパレータ
板により挟持し、かつ内部マニホールドを設けて単電池
とし、この単電池を積み重ねた集合電池がその両端のセ
パレータ板との間に集電板を介在させた締結プレートに
より締め付けボルトを介して締め付けられている燃料電
池において、前記両端のセパレータ板と集電板とを、内
部マニホールドを囲むＯリング及び可撓性若しくは流動
性を有する導電材を介在させて圧接したことを特徴とす
る。前記可撓性を有する導電材は、カーボンペーパーで
あることが好ましい。前記流動性を有する導電材は、導
電性ペーストであることが好ましい。又、第２の燃料電
池は、電解質膜を介在させた空気電極と燃料電極とをガ
ス供給溝を有するセパレータ板により挟持し、かつ内部
マニホールドを設けて単電池とし、この単電池を積み重
ねた集合電池がその両端のセパレータ板との間に集電板
を介在させた締結プレートにより締め付けボルトを介し
て締め付けられている燃料電池において、前記両端のセ
パレータ板と集電板とを弾力性を有する接着剤を空隙に
練り込んでカーボンペーパーを介在させて接合したこと
を特徴とする。前記カーボンペーパーは、厚さ10〜 500
μｍのカーボン不織布であり好ましくは 100μｍ程度の
ものが良い。In order to solve the above-mentioned problems, the first fuel cell of the present invention has an air electrode and a fuel electrode, with an electrolyte membrane interposed, sandwiched between separator plates having gas supply grooves, In addition, in a fuel cell in which an internal manifold is provided to form a unit cell, and the assembled battery in which the unit cells are stacked is fastened via fastening bolts with fastening plates with a current collector plate interposed between the separator plates at both ends thereof. The separator plates and the current collector plates at both ends are pressed against each other with an O-ring surrounding the internal manifold and a conductive material having flexibility or fluidity interposed. The conductive material having flexibility is preferably carbon paper. The conductive material having fluidity is preferably a conductive paste. In the second fuel cell, an air electrode and a fuel electrode having an electrolyte membrane interposed therebetween are sandwiched by separator plates having gas supply grooves, and an internal manifold is provided to form a single cell, and the single cell is stacked. In a fuel cell in which a battery is fastened via fastening bolts with a fastening plate having a collector plate interposed between the separator plates at both ends thereof, the separator plate at both ends and the current collector plate are bonded with elasticity. It is characterized in that the agent is kneaded into the void and bonded with carbon paper interposed. The carbon paper has a thickness of 10 to 500.
It is a carbon non-woven fabric of μm, and preferably about 100 μm.
【０００５】[0005]
【作用】本発明の第１燃料電池においては、Ｏリングが
セパレータ板と集電板の間に弾性的に介在される一方、
可撓性若しく流動性を有する導電材が、セパレータ板と
集電板の凹凸を埋め、かつ両板の間に充填される。又、
第２の燃料電池においては、弾力性を有する接着剤によ
ってセパレータ板と集電板とが弾性的に接合され、かつ
両板間にカーボンペーパーが介在される。In the first fuel cell of the present invention, the O-ring is elastically interposed between the separator plate and the current collector plate,
A flexible or fluid conductive material fills the irregularities of the separator plate and the current collector plate, and is filled between both plates. or,
In the second fuel cell, the separator plate and the current collector plate are elastically joined by an adhesive having elasticity, and carbon paper is interposed between both plates.
【０００６】[0006]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。図１は本発明の燃料電池の第１実施例の要
部を示す断面図である。図中１は片面に空気又は燃料ガ
スを供給する多数のガス供給溝２を形成したカーボンか
らなるセパレータ板であり、このセパレータ板１は、図
示はしないが、高分子電解質膜を介在させた空気電極
（陽極）と燃料電池（陰極）とを、両面に空気及び燃料
ガス（水素）を供給する多数のガス供給溝を90度方向を
異ならせて形成した集電体兼単電池直列直結用の一対の
セパレータ板（バイポーラ板）により挟持し、かつ各ガ
ス供給溝に空気又は燃料ガスを供給する内部マニホール
ドを設けて単電池（セル）とし、この単電池を直列に積
み重ねて構成される集合電池（スタック）のエンドプレ
ートとして用いられるものである。３は銅板（厚さ３m
m）に金めっき（厚さ 0.5μｍ) を施してなる集電板
で、上記集合電池の両端に配設され、図示しない締結プ
レートにより締め付けボルトにより集合電池と共に締結
される燃料電池の一部を構成する。そして、エンドプレ
ートとしてセパレータ板１と集電板３との間には、集合
電極の内部マニホールドと連通させて集電板３に設けた
内部マニホールド４、５を囲むフッ素ゴムからなるＯリ
ング６及び可撓性の導電材であるカーボンペーパー（厚
さ 100μｍのカーボン不織布）７が圧接されて介在され
ている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a main part of a first embodiment of a fuel cell of the present invention. Reference numeral 1 in the figure is a separator plate made of carbon having a large number of gas supply grooves 2 for supplying air or fuel gas on one surface. The separator plate 1 is not shown in the drawing, but air with a polymer electrolyte membrane interposed. For connecting the electrode (anode) and the fuel cell (cathode) to both sides of the current collector and the single cell in series, the gas supply grooves for supplying air and fuel gas (hydrogen) are formed on both sides in different directions by 90 degrees. An assembled battery which is sandwiched by a pair of separator plates (bipolar plates) and provided with an internal manifold for supplying air or fuel gas to each gas supply groove to form a single cell (cell), and the single cells are stacked in series. It is used as an end plate of (stack). 3 is a copper plate (thickness 3m
m) is a current collector plate plated with gold (thickness: 0.5 μm), which is placed at both ends of the above-mentioned assembled cell and is used to fasten a part of the fuel cell together with the assembled cell with fastening bolts by fastening plates (not shown) Constitute. Then, between the separator plate 1 and the current collector plate 3 as an end plate, an O-ring 6 made of fluororubber surrounding the internal manifolds 4, 5 provided on the current collector plate 3 in communication with the internal manifold of the collecting electrode, and A carbon paper (a carbon non-woven fabric having a thickness of 100 μm) 7 which is a flexible conductive material is pressed and interposed.
【０００７】図２は本発明の燃料電池の第２実施例の要
部を示す断面図であるなお、以下の説明において、図１
と同一の構成部材等には同一の符号を付してその説明を
省略する。すなわち、この燃料電池においては、カーボ
ンペーパー７の代わりに、流動性の導電材である導電性
ペースト（カーボン粒子をアクリル系樹脂に分散させた
もの）８及びＯリング６が、セパレータ板１と集電板３
との間に圧接されて介在されている。FIG. 2 is a sectional view showing a main part of a second embodiment of the fuel cell of the present invention. In the following explanation, FIG.
The same components and the like are designated by the same reference numerals and the description thereof will be omitted. That is, in this fuel cell, instead of the carbon paper 7, a conductive paste (having carbon particles dispersed in an acrylic resin) 8 and an O-ring 6, which are fluid conductive materials, gather together with the separator plate 1. Electric board 3
And is pressed and interposed between and.
【０００８】図３は本発明の燃料電池の第３実施例の要
部を示す断面図である。なお、以下の説明において、図
１と同一の構成部材等には同一の符号を付してその説明
を省略する。すなわち、この燃料電池においては、セパ
レータ板１と集電板３とを、弾力性を有する接着剤、例
えば高剥離強度を有した二液弾性接着剤を空隙に塗り込
んだ、厚さ 100μｍのカーボン不織布からなるカーボン
ペーパー９のみを介在させて弾性的に接合したものであ
る。セパレータ板１と集電板３の接合は、両者を25kgf/
cm2 で加圧して硬化するまで80℃の温度下に放置して行
なう。FIG. 3 is a sectional view showing a main part of a third embodiment of the fuel cell of the present invention. In the following description, the same components as those in FIG. 1 will be assigned the same reference numerals and the description thereof will be omitted. That is, in this fuel cell, the separator plate 1 and the current collector plate 3 were coated with an elastic adhesive, for example, a two-component elastic adhesive having a high peel strength, in the voids to form a carbon having a thickness of 100 μm. It is elastically joined with only the carbon paper 9 made of a non-woven fabric interposed. The separator plate 1 and the collector plate 3 are joined together at 25 kgf /
Press at cm 2 and leave at a temperature of 80 ° C until curing.
【０００９】ここで、上記各実施例の接触抵抗及び耐圧
と締結圧力の関係は、従来のもののそれを併記した図４
に示すようになった。図４において曲線Ａ、Ｂ、Ｃは実
施例１、２、３の接触抵抗、又曲線Ｄは従来のものの接
触抵抗を示し、曲線Ｅは各実施例及び従来のもののＯリ
ングの耐圧を示す。又、各実施例は、いずれも４kgf/cm
2 の耐圧でガスリークがなかった。Here, the relationship between the contact resistance and withstand pressure and the fastening pressure in each of the above-described embodiments is shown in FIG.
It came to be shown in. In FIG. 4, curves A, B and C show the contact resistances of Examples 1, 2 and 3, curve D shows the contact resistance of the conventional one, and curve E shows the breakdown voltage of the O-ring of each example and the conventional one. In addition, each example is 4 kgf / cm
There was no gas leak at a pressure resistance of 2 .
【００１０】[0010]
【発明の効果】以上説明したように、本発明の第１の燃
料電池によれば、Ｏリングがセパレータ板と集電板との
間に弾性的に介在される一方、可撓性若しくは、流動性
を有する導電材がセパレータ板と集電板の凹凸を埋め、
かつ両板の間に充填されるので、エンドプレートとして
のセパレータ板と集電板との間のガスシールと導電性を
共に良好にすることができる。又、第２の燃料電池によ
れば、弾性力を有する接着剤によってセパレータ板と集
電板とが弾性的に接合され、かつ両板間にカーボンペー
パーが介在されるので、上記のものと同様の効果が得ら
れると共に、熱膨脹若しくは熱収縮があってもその影響
を受けることがない。As described above, according to the first fuel cell of the present invention, the O-ring is elastically interposed between the separator plate and the current collector plate, while the O-ring is flexible or flows. Conductive material fills the unevenness of the separator plate and the collector plate,
In addition, since it is filled between both plates, it is possible to improve both the gas seal between the separator plate as the end plate and the current collector and the conductivity. Further, according to the second fuel cell, since the separator plate and the current collector plate are elastically joined by the adhesive having elastic force and the carbon paper is interposed between both plates, the same as the above The effect is obtained, and it is not affected by thermal expansion or thermal contraction.
【図１】本発明の燃料電池の第１実施例の要部を示す断
面図である。FIG. 1 is a cross-sectional view showing a main part of a first embodiment of a fuel cell of the present invention.
【図２】本発明の燃料電池の第２実施例の要部を示す断
面図である。FIG. 2 is a sectional view showing a main part of a second embodiment of the fuel cell of the present invention.
【図３】本発明の燃料電池の第３実施例の要部を示す断
面図である。FIG. 3 is a cross-sectional view showing the main parts of a third embodiment of the fuel cell of the present invention.
【図４】本発明の燃料電池の各実施例の作用を示す説明
図である。FIG. 4 is an explanatory view showing the operation of each embodiment of the fuel cell of the present invention.
【図５】従来の燃料電池の側面図である。FIG. 5 is a side view of a conventional fuel cell.
【図６】従来の燃料電池における単電池の断面図であ
る。FIG. 6 is a cross-sectional view of a single cell in a conventional fuel cell.
【図７】従来の燃料電池の要部の断面図である。FIG. 7 is a cross-sectional view of a main part of a conventional fuel cell.
１ セパレータ板（エンドプレート） ３ 集電板 ４ 内部マニホールド ５ 内部マニホールド ６ Ｏリング ７ カーボンペーパー ８ 導電性ペースト ９ カーボンペーパー 1 Separator plate (end plate) 3 Current collector 4 Internal manifold 5 Internal manifold 6 O-ring 7 Carbon paper 8 Conductive paste 9 Carbon paper
Claims (5)
極とをガス供給溝を有するセパレータ板により挟持し、
かつ内部マニホールドを設けて単電池とし、この単電池
を積み重ねた集合電池がその両端のセパレータ板との間
に集電板を介在させた締結プレートにより締め付けボル
トを介して締め付けられている燃料電池において、前記
両端のセパレータ板と集電板とを、内部マニホールドを
囲むＯリング及び可撓性若しくは流動性を有する導電材
を介在させて圧接したことを特徴とする燃料電池。1. An air electrode and a fuel electrode with an electrolyte membrane interposed therebetween are sandwiched by separator plates having gas supply grooves,
In addition, in a fuel cell in which an internal manifold is provided to form a unit cell, and the assembled battery in which the unit cells are stacked is fastened via fastening bolts with fastening plates with a current collector plate interposed between the separator plates at both ends thereof. The fuel cell is characterized in that the separator plate and the current collector plate at both ends are pressed against each other with an O-ring surrounding the internal manifold and a conductive material having flexibility or fluidity interposed.
ペーパーである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 conductive material having flexibility is carbon paper.
ーストであることを特徴とする請求項１記載の燃料電
池。3. The fuel cell according to claim 1, wherein the conductive material having fluidity is a conductive paste.
池とをガス供給溝を有するセパレータ板により挟持し、
かつ内部マニホールドを設けて単電池とし、この単電池
を積み重ねた集合電池がその両端のセパレータ板との間
に集電板を介在させた締結プレートにより締め付けボル
トを介して締め付けられている燃料電池において、前記
両端のセパレータ板と集電板とを、弾力性を有する接着
剤を空隙に練り込んだカーボンペーパーを介在させて接
合したことを特徴とする燃料電池。4. An air electrode and a fuel cell having an electrolyte membrane interposed therebetween are sandwiched by separator plates having gas supply grooves,
In addition, in a fuel cell in which an internal manifold is provided to form a unit cell, and the assembled battery in which the unit cells are stacked is fastened via fastening bolts with fastening plates with a current collector plate interposed between the separator plates at both ends thereof. A fuel cell, characterized in that the separator plate and the current collector plate at both ends are joined together with a carbon paper in which an adhesive having elasticity is kneaded into the voids interposed.
μｍのカーボン不織布であることを特徴とする請求項２
又は４記載の燃料電池。5. The carbon paper has a thickness of 10 to 500.
3. A carbon non-woven fabric having a thickness of .mu.m.
Or the fuel cell according to item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6076474A JPH07263013A (en) | 1994-03-23 | 1994-03-23 | Fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6076474A JPH07263013A (en) | 1994-03-23 | 1994-03-23 | Fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07263013A true JPH07263013A (en) | 1995-10-13 |
Family
ID=13606187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6076474A Pending JPH07263013A (en) | 1994-03-23 | 1994-03-23 | Fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07263013A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000182639A (en) * | 1998-12-16 | 2000-06-30 | Toyota Motor Corp | Sealing member and fuel cell using it |
| JP2002529890A (en) * | 1998-10-30 | 2002-09-10 | インターナショナル フュエル セルズ，エルエルシー | Improved membrane electrode assembly for PEM fuel cells |
| JP2002533869A (en) * | 1998-08-10 | 2002-10-08 | セラニーズ・ヴェンチャーズ・ゲーエムベーハー | PEM fuel cell with improved long-term performance, method of operating PEM fuel cell, and PEM fuel cell storage battery |
| KR100405479B1 (en) * | 2001-07-03 | 2003-11-14 | 현대자동차주식회사 | End plate for fuel cell stack |
| JP2006324141A (en) * | 2005-05-19 | 2006-11-30 | Toyota Motor Corp | Adhesive body and fuel cell |
| KR100813246B1 (en) * | 2006-10-12 | 2008-03-13 | 삼성에스디아이 주식회사 | Fuel cell providing stack which has improved sealing structure |
| US8076041B2 (en) | 2005-11-16 | 2011-12-13 | Toyota Jidosha Kabushiki Kaisha | Fuel cell |
| CN114864981A (en) * | 2022-05-17 | 2022-08-05 | 上海电气集团股份有限公司 | Fuel cell |
-
1994
- 1994-03-23 JP JP6076474A patent/JPH07263013A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002533869A (en) * | 1998-08-10 | 2002-10-08 | セラニーズ・ヴェンチャーズ・ゲーエムベーハー | PEM fuel cell with improved long-term performance, method of operating PEM fuel cell, and PEM fuel cell storage battery |
| JP2002529890A (en) * | 1998-10-30 | 2002-09-10 | インターナショナル フュエル セルズ，エルエルシー | Improved membrane electrode assembly for PEM fuel cells |
| JP2000182639A (en) * | 1998-12-16 | 2000-06-30 | Toyota Motor Corp | Sealing member and fuel cell using it |
| KR100405479B1 (en) * | 2001-07-03 | 2003-11-14 | 현대자동차주식회사 | End plate for fuel cell stack |
| JP2006324141A (en) * | 2005-05-19 | 2006-11-30 | Toyota Motor Corp | Adhesive body and fuel cell |
| US8076041B2 (en) | 2005-11-16 | 2011-12-13 | Toyota Jidosha Kabushiki Kaisha | Fuel cell |
| KR100813246B1 (en) * | 2006-10-12 | 2008-03-13 | 삼성에스디아이 주식회사 | Fuel cell providing stack which has improved sealing structure |
| CN114864981A (en) * | 2022-05-17 | 2022-08-05 | 上海电气集团股份有限公司 | Fuel cell |
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