JPH07226220A - Fuel cell - Google Patents

Fuel cell

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Publication number
JPH07226220A
JPH07226220A JP3545894A JP3545894A JPH07226220A JP H07226220 A JPH07226220 A JP H07226220A JP 3545894 A JP3545894 A JP 3545894A JP 3545894 A JP3545894 A JP 3545894A JP H07226220 A JPH07226220 A JP H07226220A
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JP
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Patent type
Prior art keywords
fuel
separator
cell
grooves
air
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
Application number
JP3545894A
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Japanese (ja)
Inventor
Norihisa Kamiya
規寿 神家
Original Assignee
Osaka Gas Co Ltd
大阪瓦斯株式会社
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/50Fuel cells

Abstract

PURPOSE: To enhance reliability in gas seal on the cell edge surface of a fuel cell.
CONSTITUTION: In a fuel cell, a plurality of gas passing grooves 11 through which fuel or air is passed are formed on at least one of facing surfaces of electrode plates 7, 8 and a separating plate 10, the gas passing grooves 11 in the electrodes 7, 8 are arranged so as to perpendicularly cross each other, and manifolds for supplying fuel or air to gas passing grooves 11 of the electrodes 7, 8 are connected to the facing two surfaces in the circumference of cell stack. A gasket or a sealant 14 is placed in each side between the electrode plates 7, 8 and the separating plate 10 or between an electrolyte impregnating plate 9 and the separating plate 10, continuity grooves 15 parallel to the gas passing grooves 11 are formed on the sealing surface of the separating plate 10 or on the facing surface, and both edges of each continuity groove 11 are opened on the outside of each manifold on the side edge surface of the cell stack.
COPYRIGHT: (C)1995,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、工場、ホテル、病院、 The present invention relates to a factory, hotel, hospital,
スポーツクラブ等の施設に電力及び熱を供給する需要地設置型の燃料電池に関するものである。 To facilities such as sports club is a fuel cell of the demand area installation type that provides power and heat.

【0002】 [0002]

【従来の技術】図1はこの種の燃料電池の概略系統図を示したもので、燃料改質装置1には天然ガスとエゼクタ17で吸入された水蒸気とが供給され、これらを触媒中で反応させることによって得た水素を燃料電池本体2に供給しており、燃料電池本体2で発生する電気はインバータ3で一般用途用の交流に変換される。 BACKGROUND OF THE INVENTION Figure 1 shows a schematic diagram of a fuel cell of this type, the fuel reformer 1 is supplied with the steam sucked in natural gas and the ejector 17, these in the catalyst hydrogen obtained by reacting and supplied to the fuel cell main body 2, the electricity generated in the fuel cell main body 2 is converted into alternating current for general purpose inverter 3. 4は燃料改質装置1の排ガスから水を回収する排ガス凝縮器、5は燃料電池本体2で発生する熱を回収する排熱回収装置、6 4 an exhaust gas condenser for recovering water from the fuel reformer 1 of the exhaust gas, 5 exhaust heat recovery apparatus for recovering heat generated in the fuel cell main body 2, 6
は排ガス凝縮器4で回収した水と燃料電池本体3からの排熱で水蒸気を発生させる蒸気発生器である。 Is a steam generator for generating steam in the exhaust heat from the water and the fuel cell body 3 recovered in the exhaust gas condenser 4.

【0003】燃料電池本体2は、図2に示すように、白金触媒を用いた燃料極7及び空気極8の間に電解質を含浸した多孔質板9を挟持させて構成した単位電池(セル)を隔離板10を介して多数積層して直方体形のセルスタックを構成したもので、各極板7,8と隔離板10 [0003] The fuel cell main body 2, as shown in FIG. 2, the fuel electrode 7 and the unit cell (cell) in which the porous plate 9 was impregnated with an electrolyte constituted by held between the air electrode 8 using a platinum catalyst the by multiple laminated via a separator 10 obtained by forming the cell stack of the cuboid, separator 10 and the electrode plates 7 and 8
の相対する面の少なくとも一方に(同図では極板7及び8に)燃料又は空気を通す複数本の通気溝11が設けられている。 A plurality of ventilation grooves 11 on at least one passing fuel or air (in the figure the plate 7 and 8) are provided in opposing surfaces. 両極7,8に設けられた通気溝11は互いに直交して、それぞれ両端がセルスタックの四周の相対する2面に開口しており、各極7,8の通気溝11へ燃料あるいは空気を供給するマニホールド12a,12bがそれぞれ対応する面に設けられ、各対面に排出側のマニホールドが設けられている。 Ventilation groove 11 provided on both electrodes 7 and 8 perpendicular to each other, opposite ends are opened to the four sides of two opposite sides of the cell stack, supplying fuel or air to the ventilation channel 11 of each pole 7,8 manifold 12a for, 12b are provided on the corresponding surface, respectively, the discharge side of the manifold are provided on each face.

【0004】図3は燃料電池本体2の燃料極7と空気極8の断面を同時に示したもので、水素(H2 )と空気(O2 )とは、それぞれ供給側のマニホールド12a, [0004] Figure 3 shows a cross section of the fuel cell main body 2 of the fuel electrode 7 and air electrode 8 at the same time, hydrogen (H2) and air (O2), respectively the supply side manifold 12a,
12bから極板7,8と隔離板10との重合面に形成された通気溝11を通って互いに直交する方向に進み、途中相互に反応して電気及び熱を発生させたのち、余剰の水素及び空気は排出側のマニホールド13a,13bを通って排出されるようになっており、例えば水素ガス用のマニホールド12a又は13a中に空気が漏出したり、空気用のマニホールド12b又は13b中に水素ガスが漏出したりしないように、各極7,8の側端部はシール剤14あるいはガスケットによってガスシールされている。 Proceeds through the vent grooves 11 formed in the polymerization surface of the separator 10 and the electrode plate 7 and 8 from 12b in directions perpendicular to each other, after which caused the electrical and thermal react each other in the middle, the excess hydrogen and air discharge side manifold 13a, through 13b is adapted to be discharged, for example, to air leaks into the manifold 12a or 13a for hydrogen gas, the hydrogen gas in the manifold 12b or 13b of the air so they do not or leakage, the side end portion of each pole 7,8 is gas sealed by a sealing agent 14 or a gasket.

【0005】 [0005]

【発明が解決しようとする課題】しかし上述の構成においては、ガスケットやシール剤14が経年変化により劣化したり、組立中や輸送中に偏荷重や振動等によってシール性が損なわれて、ガスが他側のマニホールド内に漏出するおそれがあり、それによって水素ガスの局部的な燃焼が生じると、更にセル端面が劣化してガス漏れが増大するという悪循環が起こり、ついには急激なセルの焼損が発生して運転不能に至る。 In the [0008] However the above-described structure, or a gasket or sealant 14 is deteriorated due to aging, impaired sealing properties by offset load or vibration or the like during or during transport assembly, gas There is a risk of leakage into the other side manifold, whereby the local combustion of hydrogen gas occurs, occurs vicious cycle gas leakage deteriorates further cell edge is increased, finally the burnout of rapid cell leading to the non-operation occurred. そこで本発明は、セル側端面のシール性が劣化しても異種ガスがマニホールド内に漏出するおそれのない燃料電池の構造を提供することを目的とするものである。 The present invention is different gases also sealing of the cell side end surface is deteriorated and has an object to provide a structure of a fuel cell with no risk of leakage into the manifold.

【0006】 [0006]

【課題を解決するための手段】本発明による燃料電池は、図4〜6に示すように、燃料極7及び空気極8の間に電解質を含浸した多孔質板9を挟持させてなるセルを隔離板10を介して多数積層して直方体形のセルスタックを構成すると共に、各極板7及び8と隔離板10の相対する面の少なくとも一方に燃料又は空気を通す複数本の通気溝11を設け、両極7,8の通気溝11が互いに直交するように配設して、セルスタックの四周の相対する2面に各極7,8の通気溝11へ燃料あるいは空気を供給するマニホールド12a,12b,13a,13b The fuel cell according to the present invention SUMMARY OF THE INVENTION As shown in FIGS. 4-6, the cell comprising by sandwiching the porous plate 9 impregnated with electrolyte between the anode 7 and cathode 8 together constitute a cell stack of a rectangular parallelepiped-shaped with a large number laminated via a separator 10, a plurality of ventilation grooves 11 through which fuel or air to at least one of the opposing surfaces of the separator 10 and the electrode plates 7 and 8 provided, and arranged such ventilation grooves 11 of the both electrodes 7 and 8 are orthogonal to each other, the manifold 12a supplying fuel or air to the ventilation channel 11 of Kakukyoku 7,8 to four sides of two opposite sides of the cell stack, 12b, 13a, 13b
を接続してなる燃料電池の上記各セルの通気溝11と平行な側辺部において、各極板7,8と隔離板10間又は電解質含浸板9と隔離板10間にガスケットあるいはシール剤14を介在させて、各極7,8の通気溝11を通るガスが側辺部から漏洩するのを防止すると共に、各隔離板10の上記シール面又はその対向面に上記通気溝1 In parallel side portions and the ventilation groove 11 of the respective cells of the fuel cell formed by connecting the respective electrode plates 7 and 8 between the separator 10 or the electrolyte impregnated plate 9 with a gasket or sealant between the separator 10 14 the interposed therebetween, along with gas through the ventilation groove 11 of each pole 7,8 is prevented from leaking from the side portion, the ventilation groove 1 on the sealing surface or the opposing surfaces of the separator 10
1と平行な導通溝15を設けて、該導通溝11の両端をセルスタックの側端面のマニホールド12a,12b, Provided 1 parallel communication slit 15, the manifold 12a of the side end face of the cell stack at both ends of the conductor through the grooves 11, 12b,
13a,13bの外側に開口させたものである。 13a, it is obtained by opening the outer 13b.

【0007】 [0007]

【作用】ガスケットやシール剤14が劣化した場合、隔離板10と極板7,8の重合面あるいは隔離板10と電解質含浸板9の重合面に形成される隙間からガスが漏出しようとするが、導通溝15が設けられていると、導通溝15まで漏れてきたガスは導通溝15を通ってセルスタックの外部へ導かれるので、これ以上異種ガス用のマニホールド側へは漏出せず、セルスタック端面における焼損が発生するおそれがない。 [Action] When the gasket or sealing material 14 is deteriorated, the gas from the gap formed in the polymerization surface of the polymer surface or separator 10 of the separator 10 and the plate 7,8 electrolyte impregnated plate 9 is to leak , conducting the grooves 15 are provided, the gas that has leaked to the communication slit 15 is led to the outside of the cell stack through the communication slit 15, without leakage to more manifold side for different gases, the cell burning in the stack end face is not likely to occur.

【0008】 [0008]

【実施例】図4〜5は本発明の一実施例を示したもので、セルスタックの1単位であるセルAは燃料極7及び空気極8の間に電解質を含浸した多孔質板9を挟持させたもので、本実施例では隔離板10の各極板7,8と相対する面に燃料又は空気を通す通気溝11が平行に複数本設けられている。 DETAILED DESCRIPTION FIG. 4-5 shows one embodiment of the present invention, the porous plate 9 impregnated with electrolyte between the cell A is a unit of the cell stack the fuel electrode 7 and air electrode 8 one obtained by sandwiching, in the present embodiment the ventilation groove 11 through which fuel or air to the surface facing the respective electrode plates 7, 8 of the separator 10 is provided a plurality of parallel. 図5では分かり易いように隔離板1 Figure 5 separator 1, the easy understanding
0の上下面に同方向に通気溝11が刻設されているが、 Ventilation groove 11 in the same direction on upper and lower surfaces of 0 but is engraved,
実際には図4に示すように両極7,8の通気溝11が互いに直交するように配設されている。 In practice, venting grooves 11 of the both electrodes 7 and 8 as shown in FIG. 4 is arranged perpendicular to each other. なお便宜上、図4 For convenience, FIG. 4
には隔離板10の上面と下面を同時に示してある。 It is shown top and bottom surfaces of the separator 10 at the same time to. セルスタックの四周には相対する2面同士が一対となるように、各極7,8の通気溝11へ燃料あるいは空気を供給する給気用及び排気用のマニホールド12a,12b, As two opposite sides to each other is a pair to the four sides of the cell stack, the manifold 12a for air supply and exhaust for supplying fuel or air to the ventilation channel 11 of each pole 7, 8, 12b,
13a,13bが接続されており、従って燃料供給用マニホールド12aとその対面側のの燃料排出用マニホールド13aに各セルAの燃料極7の通気溝11が開口し、他の2面のマニホールド12b及び13bに空気極8の通気溝11が開口している。 13a, 13b are connected, therefore the ventilation grooves 11 of the fuel electrode 7 of each cell A fuel discharge manifold 13a of the fuel supply manifold 12a and the opposite side is opened, the manifold 12b, and the other two faces ventilation groove 11 of the air electrode 8 is opened to 13b. 隔離板10の両面における通気溝11と平行な側辺部には、隔離板10とその対向する部材との間にガスシール用のシール剤14が塗布されて、各極7,8の通気溝11を通過するガスが側辺部から漏洩するのを防止しており、更に各隔離板10 The side portions parallel to the ventilation groove 11 in both surfaces of the separator 10 is sealant 14 for gas seal is applied between the separator 10 and its opposing member, the ventilation grooves of each pole 7,8 11 and the gas passing through is prevented from leaking from the side portion, and further the separator 10
の上記シール面に通気溝11と平行な導通溝15を設けて、この導通溝15の両端をセルスタックの両側端面のマニホールド12a,12b,13a,13bの外側に開口させ、もしシール剤の劣化などによりシール部を通り抜けてガスが漏れてきた場合にも、このガスが異種ガス用のマニホールドに漏出するのを阻止し、安全にセルスタックの外部へ導出するようになっている。 The ventilation groove 11 and the parallel communication slit 15 in the seal surface is provided in the manifold 12a of the opposite end surfaces of the cell stack at both ends of the communication slit 15, 12b, 13a, is opened to the outside of 13b, if the deterioration of the sealant when the leaked gas passes through the seal portion due also this gas is prevented from leaking into the manifold for different gases, so as to derive safety of the cell stack to the outside.

【0009】図6は他の実施例を示したもので、通気溝11を隔離板10に設ける代わりに極板7及び8に設け、シール剤14の代わりにガスケット16でガスシールを行ったものであり、効果は図5の場合と全く同様である。 [0009] FIG. 6 shows another embodiment, provided plate 7 and 8 instead of providing the ventilation grooves 11 in the separator 10, having been subjected to the gas seal with a gasket 16 in place of the sealant 14 , and the effect is the same as that in the FIG.

【0010】 [0010]

【発明の効果】本発明によれば上述のように、ガスケット16やシール剤14が劣化して、隔離板10と極板7,8の重合面あるいは隔離板10と電解質含浸板9の重合面に隙間が生じても、通気溝11から側方へ向かって導通溝15まで漏れてきたガスが導通溝15を通ってセルスタックの外部へ導かれるので、これ以上異種ガス用のマニホールド側へは漏出せず、従ってセルスタック端面における焼損が発生するおそれがないという利点がある。 According to the present invention as described above, the gasket 16 and the sealing agent 14 is deteriorated, polymerized surface or polymerization face of separator 10 and the electrolyte impregnation plate 9 of the separator 10 and the electrode plate 7 and 8 to be a gap, the gas which has leaked from the vent grooves 11 to communication slit 15 toward the side is guided to the outside of the cell stack through the communication slit 15, is to further manifold side for different gases without leakage, thus there is an advantage that burning in the cell stack end face is not likely to occur.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】従来の燃料電池の概略系統図。 1 is a schematic system diagram of a conventional fuel cell.

【図2】同上の燃料電池本体の一部切欠斜視図。 [2] partially cutaway perspective view of a fuel cell main body of the same.

【図3】同上の燃料電池本体の要部の横断面図。 Figure 3 is a cross-sectional view of a main part of the fuel cell body; FIG.

【図4】本発明の一実施例における燃料電池本体の横断面図。 Figure 4 is a cross-sectional view of the fuel cell main body in an embodiment of the present invention.

【図5】同上のセル部分の縦断面図。 Figure 5 is a longitudinal sectional view of a cell portion of the same.

【図6】本発明の他の実施例のセル部分の縦断面図。 Figure 6 is a longitudinal sectional view of a cell portion of another embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 燃料改質装置 2 燃料電池本体 3 インバータ 4 排ガス凝縮器 5 排熱回収装置 6 蒸気発生器 7 燃料極(板) 8 空気極(板) 9 電解質含浸板 10 隔離板 11 通気溝 12a 供給側マニホールド(燃料) 12b 供給側マニホールド(空気) 13a 排出側マニホールド(燃料) 13b 排出側マニホールド(空気) 14 シール剤 15 導通溝 16 ガスケット 17 エゼクタ 1 fuel reforming apparatus 2 fuel cell body 3 inverter 4 gas condenser 5 exhaust heat recovery device 6 steam generator 7 anode (plate) 8 air electrode (plate) 9 electrolyte impregnated plate 10 separator 11 vent grooves 12a supply manifold (fuel) 12b supply-side manifold (air) 13a discharge-side manifold (fuel) 13b discharge-side manifold (air) 14 sealing agent 15 communication slit 16 gasket 17 ejector

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 燃料極及び空気極の間に電解質を含浸した多孔質板を挟持させてなるセルを隔離板を介して多数積層して直方体形のセルスタックを構成すると共に、各極板と隔離板の相対する面の少なくとも一方に燃料又は空気を通す複数本の通気溝を設け、両極の通気溝が互いに直交するように配設して、セルスタックの四周の相対する2面に各極の通気溝へ燃料あるいは空気を供給するマニホールドを接続してなる燃料電池の上記隔離板の各面の通気溝と平行な側辺部において、隔離板とこれに対向する各極板又は電解質含浸板との間にガスケットあるいはシール剤を介在させて、各極の通気溝を通過するガスが側辺部から漏洩するのを防止すると共に、各隔離板の上記シール面に上記通気溝と平行な導通溝を設けて、 Together constituting 1. A fuel electrode and the cell stack of the cuboid and many laminated via separator cell comprising by sandwiching the impregnated porous plate electrolyte between the cathode and the electrode plate a plurality of ventilation grooves passing fuel or air to at least one of the opposing surfaces of the separator is provided and arranged so as vent grooves of both electrodes orthogonal to each other, Kakukyoku two opposite sides of four sides of the cell stack in the separator ventilation groove parallel to the side portion of each side of the fuel cell formed by connecting a manifold for supplying fuel or air to the ventilation grooves, separator and each electrode plate or electrolyte impregnated plate opposed thereto conduction by interposing a gasket or sealant, with gas passing through the ventilation grooves of each pole to prevent leakage from the side portions, parallel to the vent groove in the sealing surfaces of the separator between the provided with a groove,
    該導通溝の両端を各側端面のマニホールドの外側に開口させたことを特徴とする燃料電池。 Fuel cell, characterized in that the ends of the conductor through groove is opened to the outside of the manifold of the side end face.
JP3545894A 1994-02-08 1994-02-08 Fuel cell Pending JPH07226220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3545894A JPH07226220A (en) 1994-02-08 1994-02-08 Fuel cell

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Application Number Priority Date Filing Date Title
JP3545894A JPH07226220A (en) 1994-02-08 1994-02-08 Fuel cell

Publications (1)

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JPH07226220A true true JPH07226220A (en) 1995-08-22

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6231053B1 (en) 1999-06-11 2001-05-15 Nok Corporation Gasket for fuel cell
US6337120B1 (en) 1998-06-26 2002-01-08 Nok Corporation Gasket for layer-built fuel cells and method for making the same
US7063911B1 (en) 1999-07-13 2006-06-20 Nok Corporation Gasket for fuel cell and method of forming it
JP2008084732A (en) * 2006-09-28 2008-04-10 Aisin Seiki Co Ltd Fuel cell separator
DE10028395B4 (en) * 1999-06-11 2008-05-15 Nok Corp., Fujisawa Arrangement consisting of a polymer electrolyte membrane member and a seal for fuel cells
US7579101B2 (en) 2003-10-01 2009-08-25 Samsung Sdi Co., Ltd. Direct liquid feed fuel cell stack
EP2202833A2 (en) 1999-05-20 2010-06-30 NOK Corporation Gasket for fuel cell and method of forming it
DE102010011206A1 (en) * 2010-03-09 2011-09-15 Kai Klinder Fuel cell stack i.e. proton exchange membrane fuel cell stack, for producing power, has bipolar plates whose edges rest against outer structure, where supply of fuel and oxidant and removal of products takes place over edges of plates

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337120B1 (en) 1998-06-26 2002-01-08 Nok Corporation Gasket for layer-built fuel cells and method for making the same
US6649097B2 (en) 1998-06-26 2003-11-18 Nok Corporation Method of making a gasket for layer-built fuel cells
EP2202833A2 (en) 1999-05-20 2010-06-30 NOK Corporation Gasket for fuel cell and method of forming it
US6231053B1 (en) 1999-06-11 2001-05-15 Nok Corporation Gasket for fuel cell
DE10028395B4 (en) * 1999-06-11 2008-05-15 Nok Corp., Fujisawa Arrangement consisting of a polymer electrolyte membrane member and a seal for fuel cells
US7063911B1 (en) 1999-07-13 2006-06-20 Nok Corporation Gasket for fuel cell and method of forming it
US7579101B2 (en) 2003-10-01 2009-08-25 Samsung Sdi Co., Ltd. Direct liquid feed fuel cell stack
JP2008084732A (en) * 2006-09-28 2008-04-10 Aisin Seiki Co Ltd Fuel cell separator
DE102010011206A1 (en) * 2010-03-09 2011-09-15 Kai Klinder Fuel cell stack i.e. proton exchange membrane fuel cell stack, for producing power, has bipolar plates whose edges rest against outer structure, where supply of fuel and oxidant and removal of products takes place over edges of plates

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