JP2014149930A - Fuel cell - Google Patents

Fuel cell Download PDF

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JP2014149930A
JP2014149930A JP2013016515A JP2013016515A JP2014149930A JP 2014149930 A JP2014149930 A JP 2014149930A JP 2013016515 A JP2013016515 A JP 2013016515A JP 2013016515 A JP2013016515 A JP 2013016515A JP 2014149930 A JP2014149930 A JP 2014149930A
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fuel
spacers
spacer
fuel cell
air
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JP6022368B2 (en
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Hiroaki Yagi
宏明 八木
Yoshikuni Sato
美邦 佐藤
Nobuyuki Hotta
信行 堀田
Atsushi Mizuno
敦史 水野
Tetsuya Morikawa
哲也 森川
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Niterra Co Ltd
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NGK Spark Plug Co Ltd
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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

Abstract

PROBLEM TO BE SOLVED: To provide a fuel cell in which fastening of a collector member is prevented.SOLUTION: The fuel cell comprises: a first interconnector 12 and a second interconnector 13; a cell body 20 disposed between the first and second interconnectors and having an electrolyte 2, an air electrode 14, and a fuel electrode 15 respectively; a separator 23 having an opening to which the cell body is connected and dividing an interval between the first and second interconnectors into a fuel chamber 17 and an air chamber 16; a set of collector members 18, 19 disposed in the fuel chamber, having a connector contact part 19a adjoining the first interconnector, a cell body contact part 19b adjoining the cell body, and a junction part 19c for connecting the connector contact part and the cell body contact part, and disposed in a row; and a spacer 581, the spacer being disposed between the connector contact part and the cell body contact part of the set of collector members.

Description

本発明は，燃料電池に関する。   The present invention relates to a fuel cell.

電解質，燃料極，空気極を積層したセル本体に，燃料ガス，酸化剤ガスを供給することで，発電する燃料電池が用いられている。燃料電池では，集電部材を介して，複数のセル本体を積層することで，燃料電池スタックを構成し，発電のパワーの増加が図られる。
ここで，セル本体の変位に追従して電気的導通を確保するために，板状の本体分と，この本体分から突出する舌片を有する導電性接合部材（集電部材）を用いた燃料電池が公開されている（特許文献１参照）。 A fuel cell that generates electricity by supplying fuel gas and oxidant gas to a cell body in which an electrolyte, a fuel electrode, and an air electrode are stacked is used. In a fuel cell, by stacking a plurality of cell bodies via current collecting members, a fuel cell stack is formed, and the power of power generation is increased.
Here, in order to follow the displacement of the cell main body and ensure electrical conduction, a fuel cell using a plate-like main body portion and a conductive joining member (current collecting member) having a tongue piece protruding from the main body portion. Is disclosed (see Patent Document 1).

特開２００７−２６５８９６号公報JP 2007-265896 A

しかしながら，特許文献１記載の技術では，舌片と本体部分間が焼結し固着する可能性がある。舌片と本体部分が固着すると，セル本体の変位に追従して電気的導通を確保することが困難になる畏れがある。
上記に鑑み，本発明は，集電部材の固着を防止した燃料電池を提供することを目的とする。 However, in the technique described in Patent Document 1, there is a possibility that the tongue piece and the body portion are sintered and fixed. If the tongue piece and the main body are fixed, it may be difficult to ensure electrical continuity following the displacement of the cell main body.
In view of the above, an object of the present invention is to provide a fuel cell in which the current collecting member is prevented from sticking.

（１）本発明の一態様に係る燃料電池は，第１のインターコネクタおよび第２のインターコネクタと，前記第１および第２のインターコネクタの間に配置され，電解質，空気極，および燃料極を，それぞれ有するセル本体と，前記セル本体が接続される開口部を有し，前記第１および第２のインターコネクタの間を燃料室，空気室に区分するセパレータと，前記燃料室内に配置され，前記第１のインターコネクタに当接するコネクタ当接部と，前記セル本体に当接するセル本体当接部と，前記コネクタ当接部と前記セル本体当接部をつなぐ連接部とを有し，列をなして配置される集電部材の組と，スペーサーと，を具備し，前記スペーサーが，前記集電部材の組のコネクタ当接部とセル本体当接部の間に配置される。   (1) A fuel cell according to an aspect of the present invention is disposed between a first interconnector and a second interconnector, and the first and second interconnectors, and includes an electrolyte, an air electrode, and a fuel electrode. Each having a cell main body, an opening to which the cell main body is connected, and a separator that divides the first and second interconnectors into a fuel chamber and an air chamber, and a fuel chamber. A connector abutting portion that abuts on the first interconnector, a cell body abutting portion that abuts on the cell body, and a connecting portion that connects the connector abutting portion and the cell body abutting portion, A set of current collecting members arranged in a row and a spacer are provided, and the spacer is arranged between a connector contact portion and a cell body contact portion of the current collection member set.

スペーサーが，集電部材のコネクタ当接部とセル本体当接部の間に配置されるため，コネクタ当接部とセル本体当接部間での焼結（固着）を防止できる。また，スペーサーが，燃料室内の集電部材の組（複数の集電部材）に対応する。このため，単一の集電部材それぞれに別個のスペーサーを配置する場合に比べて，スペーサーの配置のバラツキに起因する燃料ガスの流れの阻害（圧力損失の発生）を防止できる。   Since the spacer is disposed between the connector contact portion and the cell body contact portion of the current collecting member, sintering (adherence) between the connector contact portion and the cell body contact portion can be prevented. The spacer corresponds to a set of current collecting members (a plurality of current collecting members) in the fuel chamber. For this reason, compared with the case where separate spacers are arranged on each single current collecting member, it is possible to prevent obstruction of the flow of fuel gas (occurrence of pressure loss) due to variations in the arrangement of spacers.

（２）前記集電部材の組が複数並んで配置され，前記複数の組の集電部それぞれに対応して配置される，複数のスペーサーを具備しても良い。
複数の組の集電部材に複数のスペーサーが配置されることで，集電部材の複数の組それぞれにおいて，単一の集電部材それぞれに別個のスペーサーを配置する場合に比べて，スペーサーの配置のバラツキに起因する燃料ガスの流れの阻害（圧力損失の発生）を防止できる。 (2) A plurality of sets of the current collecting members may be arranged side by side, and a plurality of spacers arranged corresponding to the plurality of current collecting portions of the plurality of sets may be provided.
By arranging multiple spacers on multiple sets of current collecting members, the arrangement of spacers in each of multiple sets of current collecting members is different from when separate spacers are arranged on each single current collecting member. Inhibition of the flow of fuel gas (occurrence of pressure loss) due to variations in pressure can be prevented.

（３）前記複数のスペーサーが，複数のスペーサー同士を接続する接続部をさらに有して，スペーサー集合体となっていても良い。
複数のスペーサーが互いに接続されることで，複数のスペーサーの配置のバラツキに起因する燃料ガスの流れの阻害（圧力損失の発生）を防止できる。 (3) The plurality of spacers may further have a connection part for connecting the plurality of spacers to form a spacer assembly.
By connecting the plurality of spacers to each other, it is possible to prevent the obstruction of fuel gas flow (occurrence of pressure loss) due to the variation in the arrangement of the plurality of spacers.

（４）前記複数のスペーサーがそれぞれ，両端部で接続されても良い。
複数のスペーサーが両端部で接続されることで，スペーサーの配置のバラツキがさらに低減され，複数のスペーサーによる燃料ガスの流れの阻害（圧力損失の発生）を防止できる。 (4) Each of the plurality of spacers may be connected at both ends.
By connecting a plurality of spacers at both ends, variations in the arrangement of the spacers can be further reduced, and obstruction of fuel gas flow (generation of pressure loss) by the plurality of spacers can be prevented.

（５）複数のスペーサーおよび前記接続部が，1枚のシートから一体的に構成されても良い。
複数のスペーサーおよび前記接続部が，1枚のシートから一体的に構成されることで，スペーサー集合体を，容易に作成することが可能となる。 (5) The plurality of spacers and the connecting portion may be integrally formed from a single sheet.
Since the plurality of spacers and the connecting portion are integrally formed from a single sheet, a spacer assembly can be easily created.

（６）前記接続部の厚さが，前記複数のスペーサーの厚さより薄くても良い。
接続部の厚さが，前記複数のスペーサーの厚さより薄いことで，接続部による燃料ガスの流れの阻害（圧力損失の発生）を低減できる。 (6) The thickness of the connection portion may be smaller than the thickness of the plurality of spacers.
Since the thickness of the connecting portion is smaller than the thickness of the plurality of spacers, obstruction of fuel gas flow (generation of pressure loss) by the connecting portion can be reduced.

（７）複数の接続部を具備し，前記複数のスペーサーおよび前記複数の接続部が，前記複数のスペーサーに対応する第１の部位と，前記複数の接続部の何れかに対応する第２の部位と，を有する第１の板材と，前記複数のスペーサーに対応する第３の部位と，前記複数の接続部の他の何れかに対応する第４の部位と，を有し，前記第１の板材に積層される第２の板材と，から構成されても良い。
第１，第２の板材を組み合わせることで，スペーサーおよびこのスペーサーより薄い接続部の組み合わせを容易に作成できる。 (7) A plurality of connecting portions, wherein the plurality of spacers and the plurality of connecting portions correspond to a first portion corresponding to the plurality of spacers and a second portion corresponding to any of the plurality of connecting portions. A first plate member having a portion; a third portion corresponding to the plurality of spacers; and a fourth portion corresponding to any other of the plurality of connection portions. And a second plate laminated on the plate.
By combining the first and second plate members, a combination of a spacer and a connection portion thinner than this spacer can be easily created.

（８）複数の接続部を具備し，前記複数のスペーサーおよび前記複数の接続部が，前記複数のスペーサーに対応する第１の部位と，前記複数の接続部に対応する第２の部位と，を有する第１の板材と，前記複数のスペーサーに対応し，前記第１の板材に積層される複数の第２の板材と，から構成されても良い。
第１，第２の板材を組み合わせることで，スペーサーおよびこのスペーサーより薄い接続部の組み合わせを容易に作成できる。 (8) comprising a plurality of connecting portions, wherein the plurality of spacers and the plurality of connecting portions are a first portion corresponding to the plurality of spacers, and a second portion corresponding to the plurality of connecting portions; And a plurality of second plate members corresponding to the plurality of spacers and stacked on the first plate member.
By combining the first and second plate members, a combination of a spacer and a connection portion thinner than this spacer can be easily created.

本発明によれば，集電部材の固着を防止した燃料電池を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the fuel cell which prevented the adhering of the current collection member can be provided.

実施形態に係る燃料電池を表す斜視図である。It is a perspective view showing the fuel cell concerning an embodiment. 燃料電池セルの分解斜視図である。It is a disassembled perspective view of a fuel cell. 燃料電池セルの分解斜視図である。It is a disassembled perspective view of a fuel cell. 燃料電池セルの概略図および断面図である。It is the schematic and sectional drawing of a fuel cell. 集電部材の斜視図である。It is a perspective view of a current collection member. 集電部材の拡大斜視図である。It is an expansion perspective view of a current collection member. スペーサー集合体装着前の集電部材の斜視図である。It is a perspective view of the current collection member before spacer assembly mounting. スペーサー集合体の斜視図である。It is a perspective view of a spacer assembly. 比較例に係る燃料電池セルの概略図および断面図である。It is the schematic and sectional drawing of a fuel cell concerning a comparative example. 変形例１に係るスペーサー集合体の斜視図である。10 is a perspective view of a spacer assembly according to Modification 1. FIG. 変形例２に係るスペーサー集合体の斜視図である。10 is a perspective view of a spacer assembly according to Modification 2. FIG. 変形例３に係るスペーサー集合体の斜視図である。It is a perspective view of the spacer aggregate | assembly which concerns on the modification 3. FIG. 変形例４に係る燃料電池セルの概略図および断面図である。FIG. 10 is a schematic view and a cross-sectional view of a fuel battery cell according to Modification 4. 変形例４に係るスペーサー集合体の分解斜視図である。It is a disassembled perspective view of the spacer aggregate | assembly which concerns on the modification 4. FIG. 変形例４に係るスペーサー集合体の分解斜視図である。It is a disassembled perspective view of the spacer aggregate | assembly which concerns on the modification 4. FIG.

以下，図面を参照して，本発明の実施の形態を詳細に説明する。
図１〜図４は，実施形態に係る燃料電池１を表す図である。燃料電池１は，例えば，ＺｒＯ２系セラミックを電解質２とする固体酸化物形燃料電池（ＳＯＦＣ）である。この燃料電池１は，発電の最小単位である燃料電池セル３と，該燃料電池セル３に空気を供給する空気供給流路４と，その空気を外部に排出する空気排気流路５と，同じく燃料電池セル３に燃料ガスを供給する燃料供給流路６と，その燃料ガスを外部に排出する燃料排気流路７と，該燃料電池セル３を複数セット積層してセル群となし該セル群を固定して燃料電池スタック８となす固定部材９と，燃料電池スタック８で発電した電気を出力する出力部材１１と，から概略構成される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1-4 is a figure showing the fuel cell 1 which concerns on embodiment. The fuel cell 1 is, for example, a solid oxide fuel cell (SOFC) having a ZrO 2 ceramic as an electrolyte 2. The fuel cell 1 includes a fuel cell 3 that is a minimum unit of power generation, an air supply passage 4 that supplies air to the fuel cell 3, and an air exhaust passage 5 that discharges the air to the outside. A fuel supply channel 6 for supplying fuel gas to the fuel cell 3, a fuel exhaust channel 7 for discharging the fuel gas to the outside, and a plurality of sets of the fuel cells 3 are stacked to form a cell group. Is fixed to a fuel cell stack 8 and an output member 11 for outputting electricity generated by the fuel cell stack 8.

燃料電池セル３は平面視正方形であり，図２に示したように，インターコネクタ１２，１３，セル本体２０，空気室１６，燃料室１７，集電部材１８，１９と，を有する。   The fuel cell 3 has a square shape in plan view, and includes interconnectors 12 and 13, a cell body 20, an air chamber 16, a fuel chamber 17, and current collecting members 18 and 19, as shown in FIG. 2.

インターコネクタ１２，１３はそれぞれ，セル本体２０の上下に配置され，四角い板形態で導電性を有するフェライト系ステンレス等で形成される。インターコネクタ１２，１３は，固定部材９の後述する締め付け部材４６ａ〜４６ｄを通すコーナー通孔４７を有する。   Each of the interconnectors 12 and 13 is disposed above and below the cell body 20 and is formed of a ferritic stainless steel having conductivity in the form of a square plate. The interconnectors 12 and 13 have corner through holes 47 through which fastening members 46a to 46d (described later) of the fixing member 9 are passed.

セル本体２０は，インターコネクタ１２，１３のほぼ中間に位置し，電解質２，および電解質２の上下に配置される空気極１４，燃料極１５を有する。
電解質２は，ＺｒＯ２系セラミックの他，ＬａＧａＯ３系セラミック，ＢａＣｅＯ３系セラミック，ＳｒＣｅＯ３系セラミック，ＳｒＺｒＯ３系セラミック，ＣａＺｒＯ３系セラミック等で形成されてもよい。 The cell main body 20 has an air electrode 14 and a fuel electrode 15 that are positioned substantially in the middle of the interconnectors 12 and 13 and are disposed above and below the electrolyte 2 and the electrolyte 2.
The electrolyte 2 may be formed of a LaGaO 3 ceramic, a BaCeO 3 ceramic, a SrCeO 3 ceramic, a SrZrO 3 ceramic, a CaZrO 3 ceramic, or the like in addition to a ZrO 2 ceramic.

燃料極１５の材質は，Ｎｉ及びＦｅ等の金属と，Ｓｃ，Ｙ等の希土類元素のうちの少なくとも１種により安定化されたジルコニア等のＺｒＯ２系セラミック，ＣｅＯ２系セラミック等のセラミックのうちの少なくとも１種との混合物が挙げられる。
また，燃料極１５の材質は，Ｐｔ，Ａｕ，Ａｇ，Ｐｂ，Ｉｒ，Ｒｕ，Ｒｈ，Ｎｉ及びＦｅ等の金属でもよく，これらの金属は１種のみでもよいし，２種以上の合金にしてもよい。
さらに，燃料極１５の材質は，これらの金属及び／又は合金と，上記セラミックの各々の少なくとも１種との混合物（サーメットを含む。）が挙げられる。また，燃料極１５の材質は，Ｎｉ及びＦｅ等の金属の酸化物と，上記セラミックの各々の少なくとも１種との混合物等が挙げられる。 The material of the fuel electrode 15 is made of a metal such as Ni and Fe and a ceramic such as a ZrO 2 ceramic such as zirconia stabilized by at least one of rare earth elements such as Sc and Y, and a CeO 2 ceramic. And a mixture with at least one of the above.
Further, the material of the fuel electrode 15 may be a metal such as Pt, Au, Ag, Pb, Ir, Ru, Rh, Ni, and Fe. These metals may be only one kind or two or more kinds of alloys. Also good.
Furthermore, the material of the fuel electrode 15 includes a mixture (including cermet) of these metals and / or alloys and at least one of each of the ceramics. Examples of the material of the fuel electrode 15 include a mixture of a metal oxide such as Ni and Fe and at least one of each of the ceramics.

空気極１４の材質は，例えば各種の金属，金属の酸化物，金属の複酸化物等を用いることができる。
前記金属としてはＰt，Ａｕ，Ａｇ，Ｐｂ，Ｉｒ，Ｒｕ及びＲｈ等の金属又は２種以上の金属を含有する合金が挙げられる。
さらに，金属の酸化物としては，Ｌａ，Ｓｒ，Ｃｅ，Ｃｏ，Ｍｎ及びＦｅ等の酸化物（Ｌａ２Ｏ３，ＳｒＯ，Ｃｅ２Ｏ３，Ｃｏ２Ｏ３，ＭｎＯ２及びＦｅＯ等）が挙げられる。
また，複酸化物としては，少なくともＬａ，Ｐｒ，Ｓｍ，Ｓｒ，Ｂａ，Ｃｏ，Ｆｅ及びＭｎ等を含有する複酸化物（Ｌａ１−ＸＳｒＸＣｏＯ３系複酸化物，Ｌａ１−ＸＳｒＸＦｅＯ３系複酸化物，Ｌａ１−ＸＳｒＸＣｏ１−ｙＦｅＯ３系複酸化物，Ｌａ１−ＸＳｒＸＭｎＯ３系複酸化物，Ｐｒ１−ＸＢａＸＣｏＯ３系複酸化物及びＳｍ１−ＸＳｒＸＣｏＯ３系複酸化物等）が挙げられる。 As the material of the air electrode 14, for example, various metals, metal oxides, metal double oxides, and the like can be used.
Examples of the metal include metals such as Pt, Au, Ag, Pb, Ir, Ru and Rh, or alloys containing two or more metals.
Furthermore, examples of the metal oxide include oxides such as La, Sr, Ce, Co, Mn and Fe (La 2 O 3 , SrO, Ce 2 O 3 , Co 2 O 3 , MnO 2 and FeO). It is done.
In addition, as a double oxide, a double oxide containing at least La, Pr, Sm, Sr, Ba, Co, Fe, Mn and the like (La 1-X Sr X CoO 3 -based double oxide, La 1-X Sr X FeO 3 -based double oxide, La 1-X Sr X Co 1-y FeO 3 -based double oxide, La 1-X Sr X MnO 3 -based double oxide, Pr 1-X Ba X CoO 3 -based double oxide And Sm 1-X Sr X CoO 3 -based double oxide).

空気室１６，燃料室１７はそれぞれ，図３，４に示したように，インターコネクタ１２と空気極１４との間，インターコネクタ１３と燃料極１５との間に形成された部屋である。   As shown in FIGS. 3 and 4, the air chamber 16 and the fuel chamber 17 are chambers formed between the interconnector 12 and the air electrode 14, and between the interconnector 13 and the fuel electrode 15, respectively.

燃料室１７は，燃料極ガス流路形成用絶縁フレーム（以下，「燃料極絶縁フレーム」ともいう。）２１と，燃料極フレーム２２と，によって，四角い部屋状に形成されている。燃料極絶縁フレーム２１は，集電部材１９の周りを囲うように，インターコネクタ１３の上面に設置された額縁形態の絶縁フレームである。燃料極フレーム２２は，額縁形態であって，前記燃料極絶縁フレーム２１の上面に設置される。   The fuel chamber 17 is formed in a square chamber shape by an anode gas flow path forming insulating frame (hereinafter also referred to as “fuel electrode insulating frame”) 21 and a fuel electrode frame 22. The fuel electrode insulating frame 21 is a frame-shaped insulating frame installed on the upper surface of the interconnector 13 so as to surround the current collecting member 19. The fuel electrode frame 22 has a frame shape and is installed on the upper surface of the fuel electrode insulating frame 21.

空気室１６は，金属製のセパレータ２３と，空気極ガス流路形成用絶縁フレーム（以下，「空気極絶縁フレーム」ともいう。）２４と，によって四角い部屋状に形成されている。金属製のセパレータ２３は，四角い額縁形態であって下面に前記電解質２が取着された導電性を有する薄い金属製のセパレータである。空気極絶縁フレーム２４は，セパレータ２３とインターコネクタ１２との間に設置されて集電部材１８の周りを囲う額縁形態の絶縁フレームである。   The air chamber 16 is formed in a square chamber shape by a metal separator 23 and an air electrode gas flow path forming insulating frame (hereinafter also referred to as “air electrode insulating frame”) 24. The metallic separator 23 is a thin metallic separator having a rectangular frame shape and having the conductivity 2 attached to the lower surface thereof. The air electrode insulating frame 24 is a frame-shaped insulating frame that is installed between the separator 23 and the interconnector 12 and surrounds the current collecting member 18.

集電部材１８，１９はそれぞれ，空気室１６，燃料室１７の内部に配置され，空気極１４とインターコネクタ１２，燃料極１５とインターコネクタ１３を電気的に接続する。   The current collecting members 18 and 19 are disposed inside the air chamber 16 and the fuel chamber 17, respectively, and electrically connect the air electrode 14 and the interconnector 12, and the fuel electrode 15 and the interconnector 13.

空気室１６側の集電部材１８は，細長い角材形状で，緻密な導電部材である例えばステンレス材で形成され，電解質２の上面の空気極１４とインターコネクタ１２の下面（内面）に当接する状態にして複数本を平行に且つ一定の間隔をおいて配設されている。   The current collecting member 18 on the air chamber 16 side is in the shape of an elongated square member, formed of a dense conductive member such as stainless steel, and is in contact with the air electrode 14 on the upper surface of the electrolyte 2 and the lower surface (inner surface) of the interconnector 12. A plurality of them are arranged in parallel and at regular intervals.

尚，上記実施形態では，空気室１６側の集電部材１８と，インターコネクタ１２とは，別体として，形成されているが，これに限ることはない。例えば，空気室１６側の集電部材１８と，インターコネクタ１２とを，一体的に形成してもよい。   In the above embodiment, the current collecting member 18 on the air chamber 16 side and the interconnector 12 are formed as separate bodies, but the present invention is not limited to this. For example, the current collecting member 18 on the air chamber 16 side and the interconnector 12 may be integrally formed.

燃料室１７側の集電部材１９は，例えば，真空中１０００℃で１時間の熱処理をして焼き鈍しを行ったＮｉの板材（ＨＶ硬度で２００以下）で形成される。集電部材１９は，図４に示したように，インターコネクタ１３に当接するコネクタ当接部１９ａと，セル本体２０の燃料極１５に当接するセル本体当接部１９ｂと，コネクタ当接部１９ａとセル本体当接部１９ｂとをつなぐＵ字状の連接部１９ｃとが一連に形成される。連接部１９ｃのＵ字に曲がった部分の弾性により，コネクタ当接部１９ａとセル本体当接部１９ｂがそれぞれインターコネクタ１３とセル本体２０に向けて付勢される。   The current collecting member 19 on the fuel chamber 17 side is formed of, for example, a Ni plate material (HV hardness of 200 or less) that is annealed by heat treatment at 1000 ° C. for one hour in a vacuum. As shown in FIG. 4, the current collecting member 19 includes a connector contact portion 19a that contacts the interconnector 13, a cell body contact portion 19b that contacts the fuel electrode 15 of the cell body 20, and a connector contact portion 19a. A U-shaped connecting portion 19c that connects the cell main body abutting portion 19b is formed in series. The connector abutting portion 19a and the cell main body abutting portion 19b are urged toward the interconnector 13 and the cell main body 20, respectively, by the elasticity of the U-shaped portion of the connecting portion 19c.

なお，燃料室１７側の集電部材１９は，前記のように板材で形成する場合の他，例えばＮｉ製の多孔質金属又は金網又はワイヤーで形成するようにしてもよい。また，燃料室１７側の集電部材１９は，Ｎｉの他，Ｎｉ合金やステンレス鋼など酸化に強い金属で形成するようにしてもよい。   Note that the current collecting member 19 on the fuel chamber 17 side may be formed of, for example, a porous metal made of Ni, a metal mesh, or a wire in addition to the case of forming the plate as described above. The current collecting member 19 on the fuel chamber 17 side may be formed of a metal resistant to oxidation such as Ni alloy or stainless steel in addition to Ni.

この集電部材１９は，燃料室１７に数十〜百個程度設けられる（燃料室の大きさにより異なる）。   The current collecting member 19 is provided in the fuel chamber 17 by several tens to hundreds (depending on the size of the fuel chamber).

スペーサー集合体５８は，図４〜８に示したように，スペーサー５８１，接続部５８２に区分され，複数のスペーサー５８１と，接続部５８２とで，一体化されて形成されている。また，スペーサー集合体５８は，コネクタ当接部１９ａとセル本体当接部１９ｂの間に配置され，厚さ方向に弾性力を有する。スペーサー集合体５８の材質としては，コネクタ当接部１９ａと，セル本体当接部１９ｂとの固着を防止する観点から，マイカ，アルミナフェルト，バーミキュライト，カーボン繊維，炭化珪素繊維，シリカの何れか１種か，或は複数種を組み合わせたものを利用できる。また，これらを例えばマイカのような薄い板状体の積層構造とすることで，積層方向への荷重に対し，適度な弾性を確保できる。   As shown in FIGS. 4 to 8, the spacer assembly 58 is divided into a spacer 581 and a connection portion 582, and is integrally formed by a plurality of spacers 581 and the connection portion 582. The spacer aggregate 58 is disposed between the connector abutting portion 19a and the cell main body abutting portion 19b and has an elastic force in the thickness direction. The spacer assembly 58 is made of any one of mica, alumina felt, vermiculite, carbon fiber, silicon carbide fiber, and silica from the viewpoint of preventing the connector contact portion 19a and the cell body contact portion 19b from sticking. Species or a combination of multiple species can be used. Moreover, by making these into a laminated structure of thin plate-like bodies such as mica, for example, appropriate elasticity can be secured against the load in the stacking direction.

複数の集電部材１９それぞれを個別に形成するより，図５，図６に示すように，複数の集電部材１９を一体として形成した方が，作業効率上，好ましい。但し，これに限ることは無く，個々の集電部材１９を，インターコネクタ１３上に並べて，溶接（例えば，レーザー溶接や抵抗要セル）してもよい。   From the viewpoint of work efficiency, it is preferable to form the plurality of current collecting members 19 integrally as shown in FIGS. 5 and 6 rather than individually form the plurality of current collecting members 19. However, the present invention is not limited to this, and the individual current collecting members 19 may be arranged on the interconnector 13 and welded (for example, laser welding or resistance required cells).

集電部材１９は，次のようにして作成できる。具体的には，図７に示すように，箔材１９０を四角い平板１９ｐに加工し，この平板１９ｐにセル本体当接部１９ｂと連接部１９ｃに対応する切込線１９ｄを形成する。そして，図６に示すように，連接部１９ｃをＵ字状に曲げて，セル本体当接部１９ｂがコネクタ当接部１９ａの上方に被さるようにする。セル本体当接部１９ｂを折り曲げることで，平板１９ｐが穴あき状態となる。穴あき状態の平板１９ｐが，コネクタ当接部１９ａの集合体となる。   The current collecting member 19 can be created as follows. Specifically, as shown in FIG. 7, the foil material 190 is processed into a rectangular flat plate 19p, and a cut line 19d corresponding to the cell main body contact portion 19b and the connecting portion 19c is formed on the flat plate 19p. Then, as shown in FIG. 6, the connecting portion 19c is bent in a U shape so that the cell main body contact portion 19b covers the connector contact portion 19a. The flat plate 19p is in a perforated state by bending the cell main body contact portion 19b. The perforated flat plate 19p is an assembly of the connector contact portions 19a.

スペーサー集合体５８は，図８に示すように，横格子状とした，一枚の材料シートから構成できる。この材料シートは，平板１９ｐとほぼ同幅で，平板１９ｐより若干短い，四角形状を有する。この材料シートから，セル本体当接部１９ｂと連接部１９ｃに対応する部分を横１列分ずつ纏めて切り抜くことにより，横格子状のスペーサー集合体５８を作成する。   As shown in FIG. 8, the spacer assembly 58 can be composed of a single sheet of material in the form of a horizontal lattice. This material sheet has a rectangular shape that is substantially the same width as the flat plate 19p and slightly shorter than the flat plate 19p. A portion corresponding to the cell main body abutting portion 19b and the connecting portion 19c is cut out from the material sheet for each horizontal row, thereby creating a horizontal lattice spacer assembly 58.

このスペーサー集合体５８を平板１９ｐ（集電部材１９への加工前，図７参照）に重ね，連接部１９ｃで曲げることで，スペーサー集合体５８を組み込んだ集電部材１９を作成できる。   The spacer assembly 58 is overlapped on the flat plate 19p (before processing into the current collecting member 19, see FIG. 7), and bent at the connecting portion 19c, whereby the current collecting member 19 incorporating the spacer assembly 58 can be created.

以上のように，インターコネクタ１３と，燃料極絶縁フレーム２１と，燃料極フレーム２２と，セパレータ２３と，空気極絶縁フレーム２４と，インターコネクタ１２と，の組合せによって燃料室１７と空気室１６が形成される。燃料室１７と空気室１６は，電解質２で仕切られる。燃料極絶縁フレーム２１と空気極絶縁フレーム２４によって，燃料極１５側と空気極１４側とが電気的に絶縁される。   As described above, the fuel chamber 17 and the air chamber 16 are formed by a combination of the interconnector 13, the fuel electrode insulating frame 21, the fuel electrode frame 22, the separator 23, the air electrode insulating frame 24, and the interconnector 12. It is formed. The fuel chamber 17 and the air chamber 16 are partitioned by the electrolyte 2. The fuel electrode 15 side and the air electrode 14 side are electrically insulated by the fuel electrode insulating frame 21 and the air electrode insulating frame 24.

燃料電池セル３は，図２，図３に示したように，空気供給部２５，空気排気部２６，燃料供給部２７，燃料排気部２８を備える。   As shown in FIGS. 2 and 3, the fuel battery cell 3 includes an air supply unit 25, an air exhaust unit 26, a fuel supply unit 27, and a fuel exhaust unit 28.

空気供給部２５は，空気室１６の内部に空気を供給するものであり，空気供給通孔２９，空気供給連絡室３０，空気供給連絡部３２，空気供給流路４（図１，図４参照）を備える。空気供給通孔２９は，四角い燃料電池セル３の一辺側中央に上下方向に開設される。空気供給連絡室３０は，空気供給通孔２９に連通するように空気極絶縁フレーム２４に開設される。空気供給連絡部３２は，空気供給連絡室３０と空気室１６の間を仕切る隔壁３１の上面を間隔に窪ませて複数個形成される。空気供給流路４は，空気供給通孔２９に挿通して外部から空気供給連絡室３０に空気を供給する。   The air supply unit 25 supplies air into the air chamber 16, and includes an air supply through hole 29, an air supply communication chamber 30, an air supply communication unit 32, and an air supply channel 4 (see FIGS. 1 and 4). ). The air supply through hole 29 is opened in the vertical direction at the center of one side of the square fuel cell 3. The air supply communication chamber 30 is opened in the air electrode insulating frame 24 so as to communicate with the air supply through hole 29. A plurality of air supply communication portions 32 are formed by recessing the upper surface of the partition wall 31 partitioning between the air supply communication chamber 30 and the air chamber 16 at intervals. The air supply flow path 4 is inserted into the air supply through hole 29 and supplies air to the air supply communication chamber 30 from the outside.

空気排気部２６は，空気室１６から空気を外部に排出するものであり，空気排気通孔３３，空気排気連絡室３４，空気排気連絡部３６，空気排気流路５（図１，図４参照）と，を備える。空気排気通孔３３は，燃料電池セル３の空気供給部２５の反対側の一辺側中央に上下方向に開設される。空気排気連絡室３４は，空気排気通孔３３に連通するように空気極絶縁フレーム２４に開設される。空気排気連絡部３６は，空気排気連絡室３４と空気室１６の間を仕切る隔壁３５の上面を間隔に窪ませて複数個形成される。空気排気流路５は，空気排気通孔３３に挿通して空気排気連絡室３４から外部に空気を排出する。   The air exhaust unit 26 discharges air from the air chamber 16 to the outside. The air exhaust unit 33, the air exhaust communication chamber 34, the air exhaust communication unit 36, and the air exhaust channel 5 (see FIGS. 1 and 4). ) And. The air exhaust hole 33 is opened in the vertical direction at the center of one side of the fuel cell 3 opposite to the air supply unit 25. The air exhaust communication chamber 34 is opened in the air electrode insulating frame 24 so as to communicate with the air exhaust through hole 33. A plurality of air exhaust communication portions 36 are formed by recessing the upper surface of the partition wall 35 separating the air exhaust communication chamber 34 and the air chamber 16 at intervals. The air exhaust passage 5 is inserted into the air exhaust passage 33 and exhausts air from the air exhaust communication chamber 34 to the outside.

燃料供給部２７は，燃料室１７の内部に燃料ガスを供給するものであり，燃料供給通孔３７，燃料供給連絡室３８，燃料供給連絡部４０，燃料供給流路６（図１，図４参照）と，を備える。燃料供給通孔３７は，四角い燃料電池セル３の残り二辺のうちの一辺側中央に上下方向に開設される。燃料供給連絡室３８は，燃料供給通孔３７に連通するように燃料極絶縁フレーム２１に開設される。燃料供給連絡部４０は。燃料供給連絡室３８と燃料室１７の間を仕切る隔壁３９の上面を間隔に窪ませて複数個形成される。燃料供給流路６は，燃料供給通孔３７に挿通して外部から前記燃料供給連絡室３８に燃料ガスを供給する。   The fuel supply unit 27 supplies fuel gas to the inside of the fuel chamber 17, and includes a fuel supply through-hole 37, a fuel supply communication chamber 38, a fuel supply communication unit 40, and a fuel supply flow path 6 (FIGS. 1 and 4). See). The fuel supply through-hole 37 is opened in the vertical direction at the center of one side of the remaining two sides of the square fuel cell 3. The fuel supply communication chamber 38 is opened in the fuel electrode insulating frame 21 so as to communicate with the fuel supply through hole 37. The fuel supply communication unit 40. A plurality of the upper surfaces of the partition walls 39 partitioning between the fuel supply communication chamber 38 and the fuel chamber 17 are formed at intervals. The fuel supply channel 6 is inserted into the fuel supply through hole 37 and supplies fuel gas to the fuel supply communication chamber 38 from the outside.

燃料排気部２８は，燃料室１７から燃料ガスを外部に排出するものであり，燃料排気通孔４１，燃料排気連絡室４２，燃料排気連絡部４４，燃料排気流路７（図１，図４参照）と，を備える。燃料排気通孔４１は，燃料電池セル３の燃料供給部２７の反対側の一辺側中央に上下方向に開設される。燃料排気連絡室４２は，燃料排気通孔４１に連通するように燃料極絶縁フレーム２１に開設される。燃料排気連絡部４４は，燃料排気連絡室４２と燃料室１７の間を仕切る隔壁４３の上面を間隔に窪ませて複数個形成される。燃料排気流路７は，前記燃料排気通孔４１に挿通して燃料排気連絡室４２から外部に燃料ガスを排出する。   The fuel exhaust 28 discharges the fuel gas from the fuel chamber 17 to the outside. The fuel exhaust 28, the fuel exhaust communication chamber 42, the fuel exhaust communication unit 44, and the fuel exhaust passage 7 (FIGS. 1 and 4). See). The fuel exhaust hole 41 is opened vertically in the center of one side of the fuel cell 3 opposite to the fuel supply unit 27. The fuel exhaust communication chamber 42 is opened in the fuel electrode insulating frame 21 so as to communicate with the fuel exhaust passage hole 41. A plurality of fuel exhaust communication portions 44 are formed by recessing the upper surface of the partition wall 43 separating the fuel exhaust communication chamber 42 and the fuel chamber 17 at intervals. The fuel exhaust passage 7 is inserted into the fuel exhaust passage 41 and discharges fuel gas from the fuel exhaust communication chamber 42 to the outside.

燃料電池スタック８は，図１に示したように，複数の燃料電池セル３を固定部材９で固定して構成される。なお，複数の燃料電池セル３を積層した場合，図面に於ける，下側に位置する燃料電池セル３の上のインターコネクタ１２と，その上側に載る燃料電池セル３の下のインターコネクタ１３とは，一体として上下の燃料電池セル３，３同士で共有される。   As shown in FIG. 1, the fuel cell stack 8 is configured by fixing a plurality of fuel cells 3 with fixing members 9. When a plurality of fuel cells 3 are stacked, an interconnector 12 above the fuel cells 3 located on the lower side and an interconnector 13 below the fuel cells 3 placed on the upper side are shown in the drawing. Is shared by the upper and lower fuel cells 3, 3 as a unit.

固定部材９は，一対のエンドプレート４５ａ，４５ｂ，四組の締め付け部材４６ａ〜４６ｄと，を組み合わせたものである。エンドプレート４５ａ，４５ｂは，燃料電池セル群（３，３）の上下を挟む。締め付け部材４６ａ〜４６ｄは，エンドプレート４５ａ，４５ｂ，複数の燃料電池セル３を締め付けるものであり，その材質は，例えばインコネル６０１である。   The fixing member 9 is a combination of a pair of end plates 45a and 45b and four sets of fastening members 46a to 46d. The end plates 45a and 45b sandwich the upper and lower sides of the fuel cell group (3, 3). The fastening members 46 a to 46 d fasten the end plates 45 a and 45 b and the plurality of fuel cells 3, and the material thereof is, for example, Inconel 601.

出力部材１１は，燃料電池スタック８で発電した電気を出力するものであり，締め付け部材４６ａ〜４６ｄから構成される。締め付け部材４６ａ，４６ｃは，正極である上のエンドプレート４５ａに電気的に接続される。締め付け部材４６ｂ，４６ｄは，負極である下のエンドプレート４５ｂに電気的に接続される。   The output member 11 outputs electricity generated by the fuel cell stack 8, and is composed of fastening members 46a to 46d. The fastening members 46a and 46c are electrically connected to the upper end plate 45a which is a positive electrode. The fastening members 46b and 46d are electrically connected to the lower end plate 45b which is a negative electrode.

正極に接続した締め付け部材４６ａ，４６ｄや負極に接続した締め付け部材４６ｂ，４６ｃは，他極のエンドプレート４５ａ（４５ｂ）に対しては絶縁座金５５（図１参照）を介在させ，また，燃料電池スタック８に対してはコーナー通孔４７との間に隙間を設けるなどして絶縁される。   The fastening members 46a and 46d connected to the positive electrode and the fastening members 46b and 46c connected to the negative electrode interpose an insulating washer 55 (see FIG. 1) with respect to the end plate 45a (45b) of the other electrode. The stack 8 is insulated by providing a gap between the corner through-hole 47 and the like.

燃料電池（燃料電池セル）が，発電する原理（電解質，燃料極，空気極を積層したセル本体に，燃料ガス，酸化剤ガスを供給することで，発電する詳細な説明）については，周知の技術の為，本実施形態では，詳細な説明を省略する。   The principle that a fuel cell (fuel cell) generates electricity (detailed explanation of generating electricity by supplying fuel gas and oxidant gas to the cell body in which the electrolyte, fuel electrode, and air electrode are stacked) is well known. Detailed description is omitted in this embodiment because of technology.

空気供給流路４に空気を供給すると，その空気は，空気供給流路４と，空気供給連絡室３０と，空気供給連絡部３２とからなる空気供給部２５を通って空気室１６に供給される。この空気は，この空気室１６の集電部材１８同士の間の隙間によって形成された空気用のガス流路５６を通り抜け，さらに空気排気連絡部３６と，空気排気連絡室３４と，空気排気流路５とからなる空気排気部２６を通って外部に排出される。   When air is supplied to the air supply channel 4, the air is supplied to the air chamber 16 through the air supply unit 25 including the air supply channel 4, the air supply communication chamber 30, and the air supply communication unit 32. The This air passes through the air gas flow path 56 formed by the gap between the current collecting members 18 of the air chamber 16, and further, the air exhaust communication portion 36, the air exhaust communication chamber 34, the air exhaust flow The air is discharged to the outside through the air exhaust portion 26 formed of the passage 5.

燃料供給流路６に燃料ガスとして例えば水素を供給すると，その燃料ガスは，燃料供給流路６と，燃料供給連絡室３８と，燃料供給連絡部４０とからなる燃料供給部２７を通って燃料室１７に供給される。この燃料ガスは，この燃料室１７の集電部材１９，１９…の間，厳密にはセル本体当接部１９ｂ，１９ｂ…同士の間の燃料ガス用のガス流路５７を拡散しながら通り抜け，さらに燃料排気連絡部４４と，燃料排気連絡室４２と，燃料排気流路７とからなる燃料排気部２８を通って外部に排気される。
なお，集電部材１９が，前記のように，多孔質金属又は金網又はワイヤーで形成されている場合には，ガス流路５７を，燃料ガスが通過し易く，かつ燃料ガスの拡散性が向上する為，好ましい。 When, for example, hydrogen is supplied to the fuel supply channel 6 as a fuel gas, the fuel gas passes through the fuel supply unit 27 including the fuel supply channel 6, the fuel supply communication chamber 38, and the fuel supply communication unit 40. It is supplied to the chamber 17. This fuel gas passes between the current collecting members 19, 19... Of the fuel chamber 17, strictly speaking, while diffusing through the fuel gas gas flow path 57 between the cell main body contact portions 19 b, 19 b. Further, the fuel is exhausted to the outside through the fuel exhaust section 28 including the fuel exhaust communication section 44, the fuel exhaust communication chamber 42, and the fuel exhaust passage 7.
When the current collecting member 19 is formed of a porous metal, a metal mesh, or a wire as described above, the fuel gas easily passes through the gas flow path 57 and the diffusibility of the fuel gas is improved. Therefore, it is preferable.

図４に示したように，複数の燃料供給連絡部４０，燃料排気連絡部４４それぞれの開口が，燃料室１７の２辺に配置される。複数の燃料供給連絡部４０，燃料排気連絡部４４それぞれの開口が対向して配置され，燃料ガスが図４（ａ）の上から下に向かって流れる。即ち，燃料ガスの流れ方向は，図４（ａ）の上から下に向かう方向となっている。   As shown in FIG. 4, the openings of the plurality of fuel supply communication units 40 and the fuel exhaust communication unit 44 are arranged on two sides of the fuel chamber 17. The openings of the plurality of fuel supply communication sections 40 and the fuel exhaust communication sections 44 are arranged to face each other, and the fuel gas flows from the top to the bottom in FIG. That is, the flow direction of the fuel gas is a direction from the top to the bottom of FIG.

本実施形態では，既に，図４，図８に示したように，スペーサー集合体５８が，スペーサー５８１と接続部５８２に区分される。   In the present embodiment, as shown in FIGS. 4 and 8, the spacer assembly 58 is already divided into the spacer 581 and the connection portion 582.

スペーサー５８１は，一列に並ぶ複数の集電部材１９（即ち，列をなして配置される集電部材１９の組）で共通に用いられ，コネクタ当接部１９ａとセル本体当接部１９ｂの間に配置される。このため，スペーサー５８１の配置，特に，コネクタ当接部１９ａとセル本体当接部１９ｂからのはみ出し部分の配置が集電部材１９の列方向（即ち，燃料ガスの流れ方向）で揃っている。   The spacer 581 is used in common by a plurality of current collecting members 19 arranged in a row (that is, a set of current collecting members 19 arranged in a row), and is provided between the connector contact portion 19a and the cell main body contact portion 19b. Placed in. For this reason, the arrangement of the spacers 581, particularly the arrangement of the protruding portions from the connector abutting portions 19 a and the cell main body abutting portions 19 b are aligned in the row direction of the current collecting members 19 (that is, the fuel gas flow direction).

接続部５８２は，複数のスペーサー５８１を接続する。ここでは，スペーサー５８１の両端それぞれに一対の接続部５８２が配置される。このため，スペーサー５８１の配置，特に，コネクタ当接部１９ａとセル本体当接部１９ｂからのはみ出し部分の配置が複数の集電部材１９の列（集電部材１９の複数の組）間で揃っている。   The connection unit 582 connects the plurality of spacers 581. Here, a pair of connection portions 582 are disposed at both ends of the spacer 581. For this reason, the arrangement of the spacers 581, particularly the arrangement of the protruding portions from the connector abutting portion 19 a and the cell main body abutting portion 19 b are aligned between the rows of the plurality of current collecting members 19 (a plurality of sets of current collecting members 19). ing.

本発明の実施形態では，上記のように，スペーサー５８１が一列に並ぶ複数の集電部材１９で共通に用いられることから，スペーサー５８１の不揃いな配置が無いため，燃料ガスの流れの阻害（即ち，圧力損失の発生）を防止できる。更に，複数のスペーサー５８１が接続部５８２で接続されていることから，後述の比較例と比べて，スペーサー５８１の不揃いな配置が無い為，燃料ガスの圧力損失のバラツキが低減され，燃料ガスの均一な流れを確保できることが可能となる。   In the embodiment of the present invention, as described above, since the spacer 581 is used in common by the plurality of current collecting members 19 arranged in a line, there is no uneven arrangement of the spacers 581, so that the flow of the fuel gas is obstructed (that is, , Pressure loss). Further, since the plurality of spacers 581 are connected by the connecting portion 582, the spacers 581 are not arranged unevenly as compared with the comparative example described later, and thus the variation in the pressure loss of the fuel gas is reduced, and the fuel gas It becomes possible to ensure a uniform flow.

（比較例）
図９は，比較例に係る燃料電池（燃料電池セル３ｘ）の上面図および断面図である。
燃料電池セル３ｘでは，本発明とは異なる構造となっている。具体的には，集電部材１９毎に，個別のスペーサー５８ｘが，それぞれ配置されている。具体的には，図９では，集電部材１００個（縦１０個かける横１０個）について，スペーサー１００個が，個別に，それぞれ配置されている。このため，集電部材１９毎に，スペーサー５８ｘの配置が一定しない（位置や方向のバラツキ，ズレが有る）。この結果，燃料ガスの流れにもバラツキが生じる。例えば，ガス流路５７それぞれに於いて，ガスの流量にバラツキが生じる。 (Comparative example)
FIG. 9 is a top view and a cross-sectional view of a fuel cell (fuel cell 3x) according to a comparative example.
The fuel cell 3x has a structure different from that of the present invention. Specifically, each spacer 58 x is arranged for each current collecting member 19. Specifically, in FIG. 9, 100 spacers are individually arranged for 100 current collecting members (10 vertical × 10 horizontal). For this reason, the arrangement of the spacers 58x is not constant for each current collecting member 19 (there is variation in position and direction and deviation). As a result, the fuel gas flow also varies. For example, the gas flow rate varies among the gas flow paths 57.

このような燃料ガスの流れのバラツキは，燃料電池の発電量や発熱量（温度分布）の局所的な偏りを生じ，燃料電池の特性，耐久性の劣化の原因ともなる。また，積層された燃料電池スタックの燃料電池セルでの特性，耐久性の劣化の原因となる。   Such variations in the flow of the fuel gas cause local deviations in the power generation amount and heat generation amount (temperature distribution) of the fuel cell, and cause deterioration in the characteristics and durability of the fuel cell. In addition, the characteristics and durability of the stacked fuel cell stack in the fuel cell are deteriorated.

（変形例１〜３）
図１０，図１１，図１２は，それぞれ，本発明の実施形態における，変形例１〜３に係る燃料電池のスペーサー集合体５８ａ〜５８ｃの斜視図である。
尚，以下の実施形態では，スペーサー集合体以外の燃料電池の部材の構成については，上記の実施形態の燃料電池と同様の構成になるため，詳細の説明は省略する。具体的には，スペーサー集合体以外は，図１から図７までの説明と同様の，燃料電池の構成となる。 (Modifications 1 to 3)
10, 11 and 12 are perspective views of spacer assemblies 58a to 58c of the fuel cell according to Modifications 1 to 3, respectively, in the embodiment of the present invention.
In the following embodiments, the configuration of the members of the fuel cell other than the spacer assembly is the same as that of the fuel cell of the above-described embodiment, and thus detailed description thereof is omitted. Specifically, the configuration of the fuel cell is the same as that described with reference to FIGS. 1 to 7 except for the spacer assembly.

（変形例１）
スペーサー集合体５８ａは，スペーサー５８１のみであり，上記の実施形態のように接続部５８２を有しない。この場合でも，スペーサー５８１が一列に並ぶ複数の集電部材１９で共通に用いられるため，スペーサー５８１の配置，特に，コネクタ当接部１９ａとセル本体当接部１９ｂからのはみ出し部分の配置が集電部材１９の列方向で揃っている為，燃料ガスの流れが均一となる効果を奏する。 (Modification 1)
The spacer aggregate 58a is only the spacer 581 and does not have the connection portion 582 as in the above embodiment. Even in this case, since the spacer 581 is commonly used by the plurality of current collecting members 19 arranged in a line, the arrangement of the spacer 581, particularly the arrangement of the protruding portion from the connector abutting portion 19 a and the cell main body abutting portion 19 b is collected. Since the electric members 19 are aligned in the row direction, there is an effect that the flow of the fuel gas becomes uniform.

（変形例２）
スペーサー集合体５８ｂでは，複数のスペーサー５８１が，その端部以外（中央付近の１箇所）で，接続部５８２により接続される。
（変形例３）
スペーサー集合体５８ｃでは，複数のスペーサー５８１が，その端部以外（２箇所）で，接続部５８２により接続される。
本発明の実施形態の変形例１〜３に於いては，このように，複数のスペーサー５８１をその端部以外で接続しても，複数のスペーサー５８１間でのバラツキを低減し，燃料ガスの均一な流れを確保できる。 (Modification 2)
In the spacer aggregate 58b, a plurality of spacers 581 are connected by a connecting portion 582 except for the end portions (one place near the center).
(Modification 3)
In the spacer aggregate 58c, a plurality of spacers 581 are connected by a connecting portion 582 at other than the end portions (two locations).
In the first to third modifications of the embodiment of the present invention, even when the plurality of spacers 581 are connected at a portion other than the end portion, variation between the plurality of spacers 581 is reduced, and the fuel gas is reduced. A uniform flow can be secured.

（変形例４）
図１３は，本発明の実施形態における，変形例４に係る燃料電池セル３ｃの概略図および断面図である。変形例４は，本発明（図１〜図３）の燃料電池のスペーサー集合体に於いて，スペーサーの厚みと，接続部との厚みが異なる例である。
燃料電池セル３ｃでは，スペーサー集合体５８ｄにおいて，スペーサー５８１の厚みより，接続部５８２の厚みが薄くなっている。このため，接続部５８２による燃料ガスの流れへの影響が低減される（燃料ガスの流路が，より確保されて，燃料ガスが流れやすくなる）。 (Modification 4)
FIG. 13 is a schematic view and a cross-sectional view of a fuel cell 3c according to Modification 4 in the embodiment of the present invention. Modification 4 is an example in which the thickness of the spacer is different from the thickness of the connecting portion in the spacer assembly of the fuel cell of the present invention (FIGS. 1 to 3).
In the fuel cell 3c, the thickness of the connecting portion 582 is thinner than the thickness of the spacer 581 in the spacer assembly 58d. For this reason, the influence on the flow of the fuel gas by the connecting portion 582 is reduced (the flow path of the fuel gas is further secured, and the fuel gas flows easily).

図１３（ｃ）に示すように，本発明の変形例４では，セル本体２０側においてスペーサー５８１と接続部５８２間に段差がある。一方，インターコネクタ１３側においてスペーサー５８１と接続部５８２間には段差が無い。   As shown in FIG. 13C, in Modification 4 of the present invention, there is a step between the spacer 581 and the connection portion 582 on the cell body 20 side. On the other hand, there is no step between the spacer 581 and the connecting portion 582 on the interconnector 13 side.

この変形例４のように，セル本体２０側に段差がある構成であると，セル本体２０側に段差が無い場合と比較して，セル本体２０への燃料ガスの供給が，より容易となるので，好ましい。但し，この構成に限ることは無く，段差が，セル本体２０側に無くても，スペーサー集合体５８ｄにおいて，スペーサー５８１の厚みより，接続部５８２の厚みが薄い構成であればよい。この構成だと，接続部５８２の厚さがスペーサー５８１の厚さと同じ場合と比較して，燃料室１７の空間が広くなるので，セル本体２０への燃料ガスの供給が容易となる。また，複数の接続部５８２において，セル本体２０側に段差があるものと無いものが混在しても良い。   If the structure has a step on the side of the cell body 20 as in the fourth modification, it is easier to supply the fuel gas to the cell body 20 than when there is no step on the side of the cell body 20. So it is preferable. However, the present invention is not limited to this configuration, and even if there is no step on the cell body 20 side, the spacer assembly 58d may have a configuration in which the thickness of the connection portion 582 is smaller than the thickness of the spacer 581. With this configuration, the space of the fuel chamber 17 becomes wider as compared with the case where the thickness of the connection portion 582 is the same as the thickness of the spacer 581, so that the fuel gas can be easily supplied to the cell body 20. Further, in the plurality of connection portions 582, those having a step on the cell body 20 side and those having no step may be mixed.

スペーサー集合体５８ｄは，場所により厚さの異なる型等を用いて，一体的に形成することができる。
また，複数のシートを組み合わせて，スペーサー集合体５８ｄを作成しても良い。 The spacer aggregate 58d can be integrally formed by using a mold having a different thickness depending on the location.
Further, the spacer aggregate 58d may be created by combining a plurality of sheets.

図１４は，２つのシート５８ｅ，５８ｆからスペーサー集合体５８ｄを構成する例を示す斜視図である。シート５８ｅ，５８ｆを例えば，接着剤で接着したり，熱で圧着したりすることで，一体化して（１枚のシートとすることで），スペーサー集合体５８ｄとすることができる。   FIG. 14 is a perspective view showing an example in which a spacer assembly 58d is configured from two sheets 58e and 58f. For example, the sheets 58e and 58f can be integrated with each other by bonding them with an adhesive or by press-bonding them with heat to form a spacer assembly 58d.

図１４では，シート５８ｅは，スペーサー５８３および接続部５８４を有し，複数のスペーサーに対応する第１の部位と，複数の接続部の何れかに対応する第２の部位と，を有する第１の板材に対応する。また，シート５８ｆは，スペーサー５８５および接続部５８６を有し，複数のスペーサーに対応する第３の部位と，前記複数の接続部の他の何れかに対応する第４の部位と，を有する第２の板材であり，前記第１の板材に積層され一体化されることにより，スペーサー集合体５８ｄを構成する。   In FIG. 14, the sheet 58 e includes a spacer 583 and a connection portion 584, and includes a first portion corresponding to a plurality of spacers and a second portion corresponding to any of the plurality of connection portions. It corresponds to the plate material. The sheet 58f includes a spacer 585 and a connection portion 586. The sheet 58f includes a third portion corresponding to the plurality of spacers and a fourth portion corresponding to any other of the plurality of connection portions. The spacer assembly 58d is configured by being laminated on and integrated with the first plate material.

スペーサー５８３，５８５は，略同一形状，同一厚さを有し，積層して用いられる。即ち，シート５８ｅ，５８ｆが重ねられることで，スペーサー５８３，５８５は全体として，スペーサー５８３，５８５個別の個別の厚さと比べて，２倍の厚さを有するスペーサー集合体５８ｄとなる。   The spacers 583 and 585 have substantially the same shape and the same thickness, and are used by being laminated. That is, by stacking the sheets 58e and 58f, the spacers 583 and 585 as a whole become a spacer assembly 58d having a thickness twice as large as the individual thickness of the spacers 583 and 585.

以上では，シート５８ｅ，５８ｆの厚さが同一であるとしているが，シート５８ｅ，５８ｆの厚さが異なっても良い。   In the above description, the thicknesses of the sheets 58e and 58f are the same, but the thicknesses of the sheets 58e and 58f may be different.

接続部５８４，５８６は，シート５８ｅ，５８ｆを重ねたときに，互いに異なる場所に配置される。即ち，シート５８ｅ，５８ｆが重ねられることで，接続部５８４，５８６は異なる箇所に配置され，重ならない。このため，接続部５８４，５８６は交互に配置される。複数の接続部５８２において，セル本体２０側に段差があるものと無いものが混在する。   The connecting portions 584 and 586 are arranged at different locations when the sheets 58e and 58f are overlapped. In other words, by overlapping the sheets 58e and 58f, the connecting portions 584 and 586 are arranged at different locations and do not overlap. For this reason, the connecting portions 584 and 586 are alternately arranged. In the plurality of connection portions 582, those having a step on the cell body 20 side and those having no step are mixed.

図１５では，シート５８ｇと複数のスペーサー５８５を組み合わせることで，スペーサー集合体５８ｄが構成される，別の例を示す斜視図である。シート５８ｇは，スペーサー５８３および接続部５８４を有し，複数のスペーサーに対応する第１の部位と，前記複数の接続部に対応する第２の部位と，を有する第１の板材に対応する。複数のスペーサー５８５は，複数のスペーサーに対応し，前記第１の板材に積層される複数の第２の板材に対応する。   FIG. 15 is a perspective view showing another example in which a spacer assembly 58d is configured by combining a sheet 58g and a plurality of spacers 585. The sheet 58g includes a spacer 583 and a connection portion 584, and corresponds to a first plate member having a first portion corresponding to the plurality of spacers and a second portion corresponding to the plurality of connection portions. The plurality of spacers 585 correspond to the plurality of spacers and correspond to the plurality of second plate members stacked on the first plate member.

シート５８ｇ（スペーサー５８３）とスペーサー５８５とを重ね合わせることで，スペーサー５８３，５８５が一体化されて，スペーサー集合体５８ｄとなる。このスペーサー集合体５８ｄにおいて，スペーサー部の厚みは，接続部５８４の厚みよりも厚くなる。   By overlapping the sheet 58g (spacer 583) and the spacer 585, the spacers 583 and 585 are integrated to form a spacer assembly 58d. In the spacer aggregate 58d, the spacer portion is thicker than the connection portion 584.

上記では，シート５８ｇ（スペーサー５８３），スペーサー５８５の厚さが同一であるとしているが，シート５８ｇ（スペーサー５８３），スペーサー５８５の厚さが異なっても良い。   In the above description, the thickness of the sheet 58g (spacer 583) and the spacer 585 is the same, but the thickness of the sheet 58g (spacer 583) and the spacer 585 may be different.

（その他の実施形態）
本発明の実施形態は上記の実施形態に限られず拡張，変更可能であり，拡張，変更した実施形態も本発明の技術的範囲に含まれる。 (Other embodiments)
Embodiments of the present invention are not limited to the above-described embodiments, and can be expanded and modified. The expanded and modified embodiments are also included in the technical scope of the present invention.

１ 燃料電池
２ 電解質
３ 燃料電池セル
４ 空気供給流路
５ 空気排気流路
６ 燃料供給流路
７ 燃料排気流路
８ 燃料電池スタック
９ 固定部材
１１ 出力部材
１２，１３ インターコネクタ
１４ 空気極
１５ 燃料極
１６ 空気室
１７ 燃料室
１８，１９ 集電部材
１９ａ コネクタ当接部
１９ｂ セル本体当接部
１９ｃ 連接部
１９ｄ 切込線
１９ｐ 平板
２０ セル本体
２１ 燃料極絶縁フレーム
２２ 燃料極フレーム
２３ セパレータ
２４ 空気極絶縁フレーム
２５ 空気供給部
２６ 空気排気部
２７ 燃料供給部
２８ 燃料排気部
２９ 空気供給通孔
３０ 空気供給連絡室
３１ 隔壁
３２ 空気供給連絡部
３３ 空気排気通孔
３４ 空気排気連絡室
３５ 隔壁
３６ 空気排気連絡部
３７ 燃料供給通孔
３８ 燃料供給連絡室
３９ 隔壁
４０ 燃料供給連絡部
４１ 燃料排気通孔
４２ 燃料排気連絡室
４３ 隔壁
４４ 燃料排気連絡部
４５ａ，４５ｂ エンドプレート
４６ａ-４６ｄ 部材
４７ コーナー通孔
５５ 絶縁座金
５６ ガス流路
５７ ガス流路
５８ スペーサー集合体
５８１，５８３，５８５ スペーサー
５８２，５８４，５８６ 接続部 DESCRIPTION OF SYMBOLS 1 Fuel cell 2 Electrolyte 3 Fuel cell 4 Air supply flow path 5 Air exhaust flow path 6 Fuel supply flow path 7 Fuel exhaust flow path 8 Fuel cell stack 9 Fixing member 11 Output member 12, 13 Interconnector 14 Air electrode 15 Fuel electrode 16 Air chamber 17 Fuel chamber 18, 19 Current collecting member 19a Connector contact portion 19b Cell main body contact portion 19c Connection portion 19d Cut line 19p Flat plate 20 Cell main body 21 Fuel electrode insulation frame 22 Fuel electrode frame 23 Separator 24 Air electrode insulation Frame 25 Air supply unit 26 Air exhaust unit 27 Fuel supply unit 28 Fuel exhaust unit 29 Air supply through hole 30 Air supply communication chamber 31 Partition 32 Air supply communication unit 33 Air exhaust communication port 34 Air exhaust communication chamber 35 Partition 36 Air exhaust communication Portion 37 Fuel supply passage 38 Fuel supply communication chamber 39 Partition 40 Fuel supply communication portion 41 Fuel exhaust passage 42 Fuel exhaust Communicating chamber 43 partition wall 44 fuel discharge communicating portion 45a, 45b end plates 46a-46d member 47 corner holes 55 insulating washer 56 gas channel 57 gas channel 58 spacer assembly 581,583,585 spacer 582,584,586 connecting portion

Claims (8)

第１のインターコネクタおよび第２のインターコネクタと，
前記第１および第２のインターコネクタの間に配置され，電解質，空気極，および燃料極を，それぞれ有するセル本体と，
前記セル本体が接続される開口部を有し，前記第１および第２のインターコネクタの間を燃料室，空気室に区分するセパレータと，
前記燃料室内に配置され，前記第１のインターコネクタに当接するコネクタ当接部と，前記セル本体に当接するセル本体当接部と，前記コネクタ当接部と前記セル本体当接部をつなぐ連接部とを有し，列をなして配置される集電部材の組と，
スペーサーと，を具備し，
前記スペーサーが，前記集電部材の組のコネクタ当接部とセル本体当接部の間に配置される
ことを特徴とする燃料電池。 A first interconnector and a second interconnector;
A cell body disposed between the first and second interconnectors, each having an electrolyte, an air electrode, and a fuel electrode;
A separator that has an opening to which the cell body is connected, and that divides the first and second interconnectors into a fuel chamber and an air chamber;
A connector abutting portion disposed in the fuel chamber and abutting on the first interconnector; a cell body abutting portion abutting on the cell body; and a connection connecting the connector abutting portion and the cell body abutting portion. A set of current collecting members that are arranged in rows,
A spacer,
The fuel cell according to claim 1, wherein the spacer is disposed between a connector contact portion and a cell body contact portion of the set of current collecting members. 前記集電部材の組が複数並んで配置され，
前記複数の組の集電部それぞれに対応して配置される，複数のスペーサーを具備する
請求項１に記載の燃料電池。 A plurality of sets of current collecting members are arranged side by side;
The fuel cell according to claim 1, further comprising a plurality of spacers arranged corresponding to each of the plurality of sets of current collectors. 前記複数のスペーサーが，前記スペーサー同士を接続する接続部をさらに有するスペーサー集合体である
請求項２に記載の燃料電池。 3. The fuel cell according to claim 2, wherein the plurality of spacers is a spacer assembly further including a connection portion that connects the spacers. 前記複数のスペーサーがそれぞれ，両端部で接続される
請求項３に記載の燃料電池。 The fuel cell according to claim 3, wherein each of the plurality of spacers is connected at both ends. 前記複数のスペーサーおよび前記接続部が，1枚のシートから一体的に構成される
請求項２乃至４のいずれか１項に記載の燃料電池。 The fuel cell according to any one of claims 2 to 4, wherein the plurality of spacers and the connecting portion are integrally formed from a single sheet. 前記接続部の厚さが，前記複数のスペーサーの厚さより薄い
ことを特徴とする請求項２乃至５のいずれか１項に記載の燃料電池。 The fuel cell according to any one of claims 2 to 5, wherein a thickness of the connection portion is thinner than a thickness of the plurality of spacers. 複数の接続部を具備し，
前記複数のスペーサーおよび前記複数の接続部が，
前記複数のスペーサーに対応する第１の部位と，前記複数の接続部の何れかに対応する第２の部位と，を有する第１の板材と，
前記複数のスペーサーに対応する第３の部位と，前記複数の接続部の他の何れかに対応する第４の部位と，を有し，前記第１の板材に積層される第２の板材と，から構成される，
ことを特徴とする請求項６記載の燃料電池。 Comprising a plurality of connections,
The plurality of spacers and the plurality of connection portions are:
A first plate member having a first portion corresponding to the plurality of spacers and a second portion corresponding to any of the plurality of connecting portions;
A second plate member having a third portion corresponding to the plurality of spacers and a fourth portion corresponding to any other of the plurality of connection portions, and laminated on the first plate member; Consisting of
The fuel cell according to claim 6. 複数の接続部を具備し，
前記複数のスペーサーおよび前記複数の接続部が，
前記複数のスペーサーに対応する第１の部位と，前記複数の接続部に対応する第２の部位と，を有する第１の板材と，
前記複数のスペーサーに対応し，前記第１の板材に積層される複数の第２の板材と，から構成される，
ことを特徴とする請求項６記載の燃料電池。 Comprising a plurality of connections,
The plurality of spacers and the plurality of connection portions are:
A first plate member having a first portion corresponding to the plurality of spacers and a second portion corresponding to the plurality of connecting portions;
A plurality of second plate members corresponding to the plurality of spacers and stacked on the first plate member;
The fuel cell according to claim 6.
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