JP2010277869A - Solid polymer fuel cell - Google Patents

Solid polymer fuel cell Download PDF

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JP2010277869A
JP2010277869A JP2009129871A JP2009129871A JP2010277869A JP 2010277869 A JP2010277869 A JP 2010277869A JP 2009129871 A JP2009129871 A JP 2009129871A JP 2009129871 A JP2009129871 A JP 2009129871A JP 2010277869 A JP2010277869 A JP 2010277869A
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band
band member
cell stack
engaging portion
fuel cell
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Shigeyuki Unoki
重幸 鵜木
Kiichi Shibata
礎一 柴田
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Panasonic Corp
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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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel battery cell stack capable of preventing short circuit of both end current collector plates when insulation of a fastening band itself as a fuel cell structural member or insulation between the fastening band and a cell stack is destroyed. <P>SOLUTION: In the fuel cell having a cell stack 12 where a plurality of cells are stacked, the current collector plate 14 arranged on both ends in the stacking direction of the cells, and a pair of end plates 18 for sandwiching the cell stack 12 and the current collector plate 14, fastening bands 22, 23 having a first band engagement section and a second band engagement section on both ends and extending to the periphery of a cell stack body 10 so as to cover the pair of end plates and a pair of opposite side faces of the cell stack body 10 are provided. The band member engagement section is provided on an end of a band member, the band member engagement sections are engaged via band engaging bodies 24a, 24b, and the band connection bodies 24a, 24b have insulation property. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、燃料電池のセルスタック及び燃料電池のセルスタックの締結方法に関し、締結バンドおよび絶縁性を有するバンド係合体を用いてセルスタック本体を締結した燃料電池のセルスタック及び燃料電池のセルスタックの締結方法に関する。   The present invention relates to a cell stack for a fuel cell and a method for fastening a cell stack for a fuel cell, and a cell stack for a fuel cell and a cell stack for a fuel cell in which a cell stack body is fastened using a fastening band and a band engaging body having insulation properties. It is related with the fastening method.

一般的な燃料電池のセルスタックは、複数のセル（単電池）が積層されたセル積層体の両端に、集電板、絶縁板及び端板がこの順に配設され、これらの積層体を締結ロッド（ボルト及びナット）により積層方向に締め付けることにより構成されている（例えば、特許文献１参照）。このような締結ロッド（ボルト及びナット）を用いた締結構造では、端板の表面からボルトの頭部及び先端部並びにナットが突出するため、燃料電池のサイズが大きくなるという問題があった。   In a general fuel cell stack, a current collector plate, an insulating plate, and an end plate are arranged in this order at both ends of a cell stack in which a plurality of cells (single cells) are stacked, and these stacks are fastened. It is configured by tightening in the stacking direction with rods (bolts and nuts) (see, for example, Patent Document 1). In such a fastening structure using fastening rods (bolts and nuts), there is a problem in that the size of the fuel cell is increased because the bolt head and tip and the nut protrude from the surface of the end plate.

このため、セルスタックの締結構造をより小さくすることによって、燃料電池を小型化する技術が種々開発されており、厚さの薄い締結バンドを用いてセルスタックを締結する技術が開示されている（例えば、特許文献２及び特許文献３参照）。特許文献２及び特許文献３に開示されている燃料電池のように、セル積層体及び端板等の締結に締結バンドを用いると、締結バンドが端板の表面から大きく突出することがないので、燃料電池のサイズを小さくすることができる。   For this reason, various technologies for reducing the size of the fuel cell by making the cell stack fastening structure smaller have been developed, and a technology for fastening the cell stack using a thin fastening band is disclosed ( For example, see Patent Document 2 and Patent Document 3). As in the fuel cells disclosed in Patent Document 2 and Patent Document 3, when the fastening band is used for fastening the cell laminate and the end plate, the fastening band does not protrude greatly from the surface of the end plate. The size of the fuel cell can be reduced.

特開２００７−５９１８７号公報JP 2007-59187 A 特開２００５−１４２１４５号公報JP 2005-142145 A

しかしながら、特許文献２に開示されている高分子電解質形燃料電池では、一つの締結バンドで両端の集電板側面上を通過するため、振動や衝撃などによりセル積層体がずれた場合、締結バンドで両端集電板を短絡するという問題があった。また、特許文献２には、締結バンドとセル積層体の間に絶縁フィルムを介することにより短絡を回避する方法が開示されているが、燃料電池のセルスタックに強い衝撃が加わった場合には、絶縁フィルムが破ける可能性があり、絶縁体としては不十分であるという問題があった。   However, in the polymer electrolyte fuel cell disclosed in Patent Document 2, the fastening band passes through the side surfaces of the current collector plates at both ends with one fastening band. There was a problem of short-circuiting the current collector plates at both ends. Patent Document 2 discloses a method of avoiding a short circuit by interposing an insulating film between the fastening band and the cell stack, but when a strong impact is applied to the cell stack of the fuel cell, There is a possibility that the insulating film may be broken, and there is a problem that the insulating film is insufficient.

本発明は、上記課題を解決するためになされたもので、締結バンド自体の絶縁性または締結バンドとセルスタック間の絶縁性が破壊された場合においても、両端集電板の短絡を防ぐことができる、燃料電池のセルスタック及び燃料電池のセルスタックの締結方法を提供することを目的とする。   The present invention has been made to solve the above-described problems, and prevents short-circuiting of the current collector plates at both ends even when the insulation of the fastening band itself or the insulation between the fastening band and the cell stack is broken. It is an object of the present invention to provide a fuel cell stack and a method for fastening the fuel cell stack.

上記課題を解決するために、本発明に係る燃料電池のセルスタックは、複数のセルが積層されたセル積層体と、前記セル積層体の前記セルの積層方向の両端に配設された集電板と、さらに前記集電板の端に配設された弾性部材と、前記セル積層体と前記弾性部材とを挾持する一対の端板と、有するセルスタック本体と、両端部に第１バンド係合部と第２バンド係合部とを有し、前記セルスタック本体の一対の端面と互いに対向する一対の側面とを覆うように前記セルスタック本体の周囲に延在する締結バンドと、を備え、前記締結バンドは、Ｕ字状の第１バンド部材とＵ字状の第２バンド部材とから構成されている。   In order to solve the above problems, a cell stack of a fuel cell according to the present invention includes a cell stack in which a plurality of cells are stacked, and current collectors disposed at both ends of the cell stack in the cell stacking direction. A cell stack body having a plate, an elastic member disposed at an end of the current collector plate, a pair of end plates sandwiching the cell stack and the elastic member, and first band members at both ends. A fastening band extending around the cell stack main body so as to cover a pair of side surfaces facing each other and a pair of end surfaces of the cell stack main body The fastening band includes a U-shaped first band member and a U-shaped second band member.

前記第１バンド部材の一方の端部には第１バンド部材係合部が設けられ、前記第１バンド部材の他方の端部には第２バンド部材係合部が設けられ、
前記第２バンド部材の一方の端部には第３バンド部材係合部が設けられ、前記第２バンド部材の他方の端部には第４バンド部材係合部が設けられ、
前記第１バンド部材係合部と前記第３バンド部材係合部とが第一のバンド係合体を介して係合され、かつ、
前記第２バンド部材係合部と前記第４バンド部材係合部とが第二のバンド係合体を介して係合することにより、前記セルスタック本体が前記締結バンドにより締結されており、
前記第一及び第二のバンド係合体が絶縁性を有している。 A first band member engaging portion is provided at one end of the first band member, and a second band member engaging portion is provided at the other end of the first band member,
A third band member engaging portion is provided at one end of the second band member, and a fourth band member engaging portion is provided at the other end of the second band member.
The first band member engaging portion and the third band member engaging portion are engaged via a first band engaging body, and
The cell stack body is fastened by the fastening band by engaging the second band member engaging portion and the fourth band member engaging portion via a second band engaging body,
The first and second band engaging bodies are insulative.

これにより、締結バンド自体の絶縁性または締結バンドとセルスタック間の絶縁性が破壊された場合においても、両端集電板の短絡を防ぐことができる。   Thereby, even when the insulation property of the fastening band itself or the insulation property between the fastening band and the cell stack is broken, it is possible to prevent short-circuiting of the current collector plates at both ends.

また、本発明に係る燃料電池のセルスタックでは、前記バンド係合体は表面を絶縁処理した金属であってもよい。   Moreover, in the cell stack of the fuel cell according to the present invention, the band engaging body may be a metal whose surface is insulated.

また、本発明に係る燃料電池のセルスタックでは、前記バンド係合体の材質は絶縁性ゴムであってもよい。   In the cell stack of the fuel cell according to the present invention, the material of the band engaging body may be an insulating rubber.

また、本発明に係る燃料電池のセルスタックでは、前記バンド係合体の材質は樹脂であってもよい。   In the cell stack of the fuel cell according to the present invention, the material of the band engaging body may be a resin.

また、本発明に係る燃料電池のセルスタックでは、前記バンド係合体はピンであってもよい。   In the cell stack of the fuel cell according to the present invention, the band engaging body may be a pin.

本発明の燃料電池のセルスタック及び燃料電池のセルスタックの締結方法では、締結バンド自体の絶縁性または締結バンドとセルスタック間の絶縁性が破壊された場合においても、両端集電板の短絡を防ぐことが可能となる。   In the fuel cell stack and the method for fastening the fuel cell stack according to the present invention, even if the insulation of the fastening band itself or the insulation between the fastening band and the cell stack is broken, the current collector plates at both ends are short-circuited. It becomes possible to prevent.

図１は、本発明の実施の形態１に係る燃料電池のセルスタック概略構成を模式的に示す平面図FIG. 1 is a plan view schematically showing a schematic configuration of a cell stack of a fuel cell according to Embodiment 1 of the present invention. 図２は、図１に示す燃料電池のセルスタックの係合部側正面図2 is a front view of the engaging portion side of the cell stack of the fuel cell shown in FIG. 図３は、図１に示す燃料電池のセルスタックの第１バンド部材及び第２バンド部材の斜視図3 is a perspective view of the first band member and the second band member of the cell stack of the fuel cell shown in FIG. 図４は、図３に示す第１バンド部材及び第２バンド部材のバンド部材係合部を含む断面図(I―I´)4 is a cross-sectional view (II ′) including band member engaging portions of the first band member and the second band member shown in FIG. 図５は、本発明の実施の形態２に係る燃料電池のセルスタックの概略構成を模式的に示す平面図FIG. 5 is a plan view schematically showing a schematic configuration of a cell stack of a fuel cell according to Embodiment 2 of the present invention. 図６は、図５に示す燃料電池のセルスタックの係合部側正面図6 is a front view of the engaging portion side of the cell stack of the fuel cell shown in FIG. 図７は、図２に示す燃料電池のセルスタックの第１バンド部材及び第２バンド部材の斜視図7 is a perspective view of the first band member and the second band member of the cell stack of the fuel cell shown in FIG. 図８は、図７に示す第１バンド部材及び第２バンド部材のバンド部材係合部を含む断面図(II−II´、III−III´)8 is a cross-sectional view (II-II ′, III-III ′) including band member engaging portions of the first band member and the second band member shown in FIG.

以下、本発明の好ましい実施の形態を、図面を参照しながら説明する。なお、全ての図面において、同一または相当部分には同一符号を付し、重複する説明は省略する。また、以下に示す各実施の形態では、本発明を固体高分子形燃料電池（ＰＥＦＣ）に適用したものであるが、本発明は、固体酸化物形燃料電池（ＳＯＦＣ）またはリン酸形燃料電池（ＰＡＦＣ）等のような他の形式の燃料電池にも幅広く適用可能である。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. In the following embodiments, the present invention is applied to a polymer electrolyte fuel cell (PEFC). However, the present invention is not limited to a solid oxide fuel cell (SOFC) or a phosphoric acid fuel cell. It can be widely applied to other types of fuel cells such as (PAFC).

（実施の形態１）
［燃料電池のセルスタックの構成］
図１は、本発明の実施の形態１に係る燃料電池のセルスタックの概略構成を模式的に示す平面図であり、図２は、図１に示す燃料電池のセルスタックの構成を示す係合部側正面図である。なお、図１及び図２において、燃料電池のセルスタックにおける上下方向を図における上下方向として表している。図４は、図３に示す第１バンド部材及び第２バンド部材のバンド部材係合部を含む断面図(I―I´)である。 (Embodiment 1)
[Configuration of fuel cell stack]
1 is a plan view schematically showing a schematic configuration of a cell stack of a fuel cell according to Embodiment 1 of the present invention, and FIG. 2 is an engagement showing a configuration of the cell stack of the fuel cell shown in FIG. FIG. 1 and 2, the vertical direction in the cell stack of the fuel cell is shown as the vertical direction in the drawings. 4 is a cross-sectional view (II ′) including band member engaging portions of the first band member and the second band member shown in FIG.

図１及び図２に示すように、本発明の実施の形態１に係る燃料電池のセルスタック１０は、直方体状のセル積層体１２と、Ｕ字状の第１バンド部材２２とＵ字状の第２バンド部材２３とから構成される締結バンドと、一対のバンド係合体２４ａ、２４ｂと、を備えている。   As shown in FIGS. 1 and 2, the cell stack 10 of the fuel cell according to Embodiment 1 of the present invention includes a rectangular parallelepiped cell stack 12, a U-shaped first band member 22, and a U-shaped A fastening band constituted by the second band member 23 and a pair of band engaging bodies 24a and 24b are provided.

セル積層体１２（図１）は、起電力を生じさせる複数のセル（単電池）２８を積層するとともに、これらを直列接続することによって構成された積層電池である。各セル２８は、アノード（燃料極）とカソード（空気極）とこれらに挟まれた固体高分子膜（イオン交換膜）とからなるＭＥＡ（膜／電極接合体）を、２枚の導電性のセパレータ（バイポーラプレート）で挟みこんだ四角板状の部品であり、隣接するセル２８のセパレータどうしが接触することによって、全てのセル２８が直列に接続されている。   The cell stack 12 (FIG. 1) is a stacked battery configured by stacking a plurality of cells (unit cells) 28 that generate electromotive force and connecting them in series. Each cell 28 is composed of an MEA (membrane / electrode assembly) composed of an anode (fuel electrode), a cathode (air electrode), and a solid polymer membrane (ion exchange membrane) sandwiched between the two conductive layers. It is a square plate-like component sandwiched between separators (bipolar plates), and all the cells 28 are connected in series when the separators of the adjacent cells 28 are in contact with each other.

集電板１４は、図１および図２に示すように、緻密質カーボンまたは銅等のようなガス不透過性かつ導電性の材料からなる四角板状の集電部１４ａを有しており、集電部１４ａの一つの側端縁には、出力端子１４ｂが一体に形成されている。   As shown in FIGS. 1 and 2, the current collector plate 14 has a square plate-shaped current collector 14a made of a gas-impermeable and conductive material such as dense carbon or copper, An output terminal 14b is integrally formed on one side edge of the current collector 14a.

絶縁板１６は、集電板１４の端板１８と対向する側の面を絶縁するものであり、ゴムまたはプラスチック等のような絶縁性の材料を用いて四角板状に形成されている。   The insulating plate 16 insulates the surface of the current collector plate 14 facing the end plate 18 and is formed in a square plate shape using an insulating material such as rubber or plastic.

端板１８は、第１バンド部材２２、第２バンド部材２３による締結力をセル積層体１２および集電板１４に対して均等な面圧で付与するものであり、締結力による変形を防止するために硬質プラスチックまたは鋼等のような高剛性材料を用いて四角板状に形成されている。   The end plate 18 applies a fastening force by the first band member 22 and the second band member 23 to the cell stack 12 and the current collector plate 14 with an equal surface pressure, and prevents deformation due to the fastening force. Therefore, it is formed in a square plate shape using a highly rigid material such as hard plastic or steel.

圧縮ばね２０は、セル積層体１２および集電板１４等を含む積層体に対して積層方向の押圧力を付与するものであり、図１に示すように、各辺４×４＝１６個の圧縮ばね２０がセル積層体１２の面に対し等間隔の位置に配設されている。   The compression spring 20 applies a pressing force in the stacking direction to the stack including the cell stack 12 and the current collector plate 14. As shown in FIG. 1, each side 4 × 4 = 16 The compression springs 20 are arranged at equally spaced positions with respect to the surface of the cell stack 12.

第１バンド部材２２及び第２バンド部材２３は、セル積層体１２、集電板１４、絶縁板１６、端板１８および圧縮ばね２０を積層方向において締め付ける断面四角形の帯状部材であり、セル積層体１２の上面（上端面）、下面（下端面）、及び互いに対向する一対の側面を覆って、セル積層体１２の周囲に延在するように配置されている。   The first band member 22 and the second band member 23 are band-shaped members having a quadrangular cross section that fasten the cell stack 12, the current collector plate 14, the insulating plate 16, the end plate 18 and the compression spring 20 in the stacking direction. The upper surface (upper end surface), the lower surface (lower end surface), and a pair of side surfaces facing each other are covered so as to extend around the cell stack 12.

第１バンド部材２２及び第２バンド部材２３は、樹脂（エンジニアリングプラスチック、エラストマー等）、ステンレス鋼（ＳＵＳ３０４等）またはクロムモリブデン鋼等のような引張強度及び防錆性に優れた材料によって構成されている。組立て性の観点から、Ｕ字形状であることが好ましい。   The first band member 22 and the second band member 23 are made of a material excellent in tensile strength and rust resistance, such as resin (engineering plastic, elastomer, etc.), stainless steel (SUS304, etc.), or chromium molybdenum steel. Yes. From the viewpoint of assemblability, a U-shape is preferable.

バンド係合体２４ａ及び２４ｂは、第１バンド部材２２及び第２バンド部材２３を係合する部材である。絶縁性を有し、締結に耐える剛性を有する材料であればよく、クロムモリブデン鋼、ステンレス鋼（ＳＵＳ３０４等）などの金属材料の表面を絶縁処理したもの、絶縁性ゴム、硬質プラスチックなどの樹脂が好ましい。   The band engaging bodies 24 a and 24 b are members that engage the first band member 22 and the second band member 23. Any material can be used as long as it has an insulating property and a rigidity capable of withstanding fastening, such as a metal material such as chrome molybdenum steel and stainless steel (SUS304, etc.), an insulating rubber, a resin such as hard plastic. preferable.

第１バンド部材２２の一方の端部には第１バンド部材係合部２２ａ、他方の端部には第２バンド部材係合部２２ｂが設けられ、第２バンド部材の一方の端部には第３バンド部材係合部２３ａ、他方の端部には第４バンド部材係合部２３ｂが設けられている。第１バンド部材係合部２２ａ、第３バンド部材係合部２３ａは、バンド接合体２４aを介して第１バンド部材２２と第２バンド部材２３を係合させるためにバンド端部に設けられた構造であり、例えば、ナットやロッドを通すための孔、バンド接合体２４aと直接係り合う係止形状としてもよい。   A first band member engaging portion 22a is provided at one end of the first band member 22, a second band member engaging portion 22b is provided at the other end, and one end of the second band member is provided at one end. A third band member engaging portion 23a is provided at the other end, and a fourth band member engaging portion 23b is provided at the other end. The first band member engaging portion 22a and the third band member engaging portion 23a are provided at the end of the band in order to engage the first band member 22 and the second band member 23 via the band joined body 24a. For example, a hole for passing a nut or a rod or a locking shape that directly engages with the band joined body 24a may be employed.

ここで、図１から図４を参照しながら、第１バンド部材２２の第１バンド部材係合部２６ａと第２バンド部材係合部２６ｂ及び第２バンド部材２３の第３バンド部材係合部２７ａと第４バンド部材係合部２７ｂの構成を詳細に説明する。なお、第１バンド部材２２の第１バンド部材係合部２６ａ及び第２バンド部材係合部２６ｂと第２バンド部材２３の第３バンド部材係合部２７ａ及び第４バンド部材係合部２７ｂは、同様に構成されているため、以下の説明では、第１バンド部材２２の第１バンド部材係合部２６ａと第２バンド部材２３の第４バンド部材係合部２７ａについて説明する。   Here, with reference to FIGS. 1 to 4, the first band member engaging portion 26 a and the second band member engaging portion 26 b of the first band member 22 and the third band member engaging portion of the second band member 23. The structure of 27a and the 4th band member engaging part 27b is demonstrated in detail. The first band member engaging portion 26a and the second band member engaging portion 26b of the first band member 22 and the third band member engaging portion 27a and the fourth band member engaging portion 27b of the second band member 23 are In the following description, the first band member engagement portion 26a of the first band member 22 and the fourth band member engagement portion 27a of the second band member 23 will be described.

図２（ｂ）に示したように、第１バンド部材２２の第１バンド部材係合部２６ａと第２バンド部材２３の第４バンド部材係合部２７ａはセル積層体１２の側面側においてバンド係合体２４aを介して係り合った状態となって固定されている。本実施形態では、第１バンド部材係合部２６aとバンド係合体２４aは、連結ねじ２２aによって固定されている。連結ねじ２２aのような第１バンド部材係合部２６aとバンド係合体２４aを固定するための部材は必ずしも必要ではなく、例えば、第１バンド部材係合部２６aとバンド係合体２４aが直接係り合い係止するような形状としてもよい。   As shown in FIG. 2B, the first band member engaging portion 26 a of the first band member 22 and the fourth band member engaging portion 27 a of the second band member 23 are banded on the side surface side of the cell stack 12. It is fixed in an engaged state via the engagement body 24a. In the present embodiment, the first band member engaging portion 26a and the band engaging body 24a are fixed by the connecting screw 22a. A member such as the connecting screw 22a for fixing the first band member engaging portion 26a and the band engaging body 24a is not necessarily required. For example, the first band member engaging portion 26a and the band engaging body 24a are directly engaged with each other. It is good also as a shape which latches.

燃料電池スタック１０を組み立てる際には、第２バンド部材２３上に、セル積層体１２の積層方向両側に集電板１４、絶縁板１６および端板１８を配置するとともに、一方の絶縁板１６と端板１８との間に圧縮ばね２０を配置し、さらにその上から第１バンド部材２２を配置する。これらを第１バンド部材２２、第２バンド部材２３の外側から押圧し、積層方向に締め付けながら、第１バンド部材係合部２６ａ、バンド係合体２４ａ、第２バンド部材係合部２７ａの位置を合わせて貫通孔を一致させた後、一致した貫通孔に連結ネジ２２ａ、２３ａを貫通させ、接続部を形成し締結する。したがって、第１バンド部材２２と第２バンド部材２３は絶縁性を有するバンド係合体２４ａを挟んで係合されることになり、第１バンド部材２２と第２バンド部材２３は電気的に絶縁することができる。   When assembling the fuel cell stack 10, the current collector plate 14, the insulating plate 16, and the end plate 18 are disposed on both sides of the cell stack 12 in the stacking direction on the second band member 23. The compression spring 20 is disposed between the end plate 18 and the first band member 22 is disposed thereon. While pressing these from the outside of the first band member 22 and the second band member 23 and tightening them in the stacking direction, the positions of the first band member engaging portion 26a, the band engaging body 24a, and the second band member engaging portion 27a are adjusted. After matching the through-holes together, the connecting screws 22a and 23a are passed through the matched through-holes to form connection portions and fasten. Therefore, the 1st band member 22 and the 2nd band member 23 will be engaged on both sides of the band engaging body 24a which has insulation, and the 1st band member 22 and the 2nd band member 23 will be electrically insulated. be able to.

なお、第１実施形態では、セル２８、集電板１４、絶縁板１６および端板１８を四角板状に形成しているが、これらの形状は特に限定されるものではなく、長円板状または六画板状等であってもよい。   In the first embodiment, the cell 28, the current collector plate 14, the insulating plate 16 and the end plate 18 are formed in a square plate shape, but these shapes are not particularly limited, and are in the shape of an oval plate. Alternatively, it may be a hexagonal plate shape.

（実施の形態２）
図５は、本発明の実施の形態２に係る燃料電池のセルスタックの概略構成を模式的に示す平面図であり、図６は、図５に示す燃料電池のセルスタックの構成を示す係合部側正面図である。なお、図５及び図６において、燃料電池のセルスタックにおける上下方向を図における上下方向として表している。図８は、図７に示す第１バンド部材及び第２バンド部材の断面図(II−II´、III−III´)である。 (Embodiment 2)
5 is a plan view schematically showing a schematic configuration of a cell stack of a fuel cell according to Embodiment 2 of the present invention, and FIG. 6 is an engagement showing a configuration of the cell stack of the fuel cell shown in FIG. FIG. 5 and 6, the vertical direction in the cell stack of the fuel cell is represented as the vertical direction in the drawings. 8 is a cross-sectional view (II-II ′, III-III ′) of the first band member and the second band member shown in FIG.

図５及び図６に示すように、本発明の実施の形態２に係る燃料電池のセルスタック１０は、実施の形態１に係る燃料電池のセルスタック１０と基本的構成は同じであるが、第１バンド部材２２の第１バンド部材係合部２６ａ及び第２バンド部材係合部２６ｂ、第２バンド部材２３の第３バンド部材係合部２７ａ及び第４バンド部材係合部２７ｂの構成が異なる。   As shown in FIGS. 5 and 6, the cell stack 10 of the fuel cell according to Embodiment 2 of the present invention has the same basic configuration as the cell stack 10 of the fuel cell according to Embodiment 1, The configurations of the first band member engaging portion 26a and the second band member engaging portion 26b of the 1 band member 22 and the third band member engaging portion 27a and the fourth band member engaging portion 27b of the second band member 23 are different. .

具体的には、本実施の形態２に係る燃料電池のセルスタック１０では、第１バンド部材係合部２６ａ〜第４バンド部材係合部２７ｂは、第１バンド部材２２及び第２バンド部材２３の端から面方向（ここでは、鉛直方向）に沿って突出するように形成されており、鉛直方向に締結ピン２５a、２５ｂを通すための挿通孔が形成されている(図８)。また、第１バンド部材２２の第１バンド部材係合部２６ａと第２バンド部材２３の第４バンド部材係合部２７ａは、互いに接触しないように形成されていて、同様に、第１バンド部材２２の第２バンド部材係合部２６ｂと第２バンド部材２３の第３バンド部材係合部２７ｂは、互いに接触しないように形成されている。   Specifically, in the cell stack 10 of the fuel cell according to Embodiment 2, the first band member engaging portion 26 a to the fourth band member engaging portion 27 b are the first band member 22 and the second band member 23. Are formed so as to protrude along the surface direction (in this case, the vertical direction), and through holes for passing the fastening pins 25a and 25b are formed in the vertical direction (FIG. 8). Further, the first band member engaging portion 26a of the first band member 22 and the fourth band member engaging portion 27a of the second band member 23 are formed so as not to contact each other. Similarly, the first band member The 22nd band member engaging part 26b of 22 and the 3rd band member engaging part 27b of the 2nd band member 23 are formed so that it may not contact mutually.

そして、第１バンド部材２２の挿通穴（第１バンド部材係合部２６a）と第２バンド部材２３の挿通穴（第４バンド部材係合部２７ａ）には、絶縁性を有する締結ピン２５ａ(バンド係合体)が挿通され、同様に、第１バンド部材２２の挿通穴（第２バンド部材係合部２６ｂ）と第２バンド部材２３の挿通穴（第３バンド部材係合部２７ｂには、絶縁性を有する締結ピン２５ｂ(バンド係合体)が挿通され、第１バンド部材２２と第２バンド部材２３が係合されている。したがって、第１バンド部材２２と第２バンド部材２３は絶縁性を有する締結ピン２５ａを挟んで係合されることになり、第１バンド部材２２と第２バンド部材２３を電気的に絶縁することができる。   In addition, in the insertion hole (first band member engagement portion 26a) of the first band member 22 and the insertion hole (fourth band member engagement portion 27a) of the second band member 23, an insulating fastening pin 25a ( The band engagement body) is inserted, and similarly, the insertion hole (second band member engagement portion 26b) of the first band member 22 and the insertion hole (third band member engagement portion 27b) of the second band member 23 include An insulating fastening pin 25b (band engagement body) is inserted, and the first band member 22 and the second band member 23 are engaged, so that the first band member 22 and the second band member 23 are insulative. Therefore, the first band member 22 and the second band member 23 can be electrically insulated.

このように構成された本実施の形態２に係る燃料電池のセルスタック１０であっても、実施の形態１に係る燃料電池のセルスタック１０と同様の作用効果を奏する。   Even the cell stack 10 of the fuel cell according to the second embodiment configured as described above has the same effects as the cell stack 10 of the fuel cell according to the first embodiment.

本発明の燃料電池のセルスタック及び燃料電池のセルスタックの締結方法は、締結バンド自体の絶縁性または締結バンドとセルスタック間の絶縁性が破壊された場合においても、両端集電板の短絡を防ぐことができるため、燃料電池の技術分野で有用である。   According to the fuel cell stack of the present invention and the method of fastening the fuel cell stack, even if the insulation of the fastening band itself or the insulation between the fastening band and the cell stack is broken, the collector plates at both ends are short-circuited. This is useful in the technical field of fuel cells.

１０ 燃料電池セルスタック
１２ セル積層体
１４ 集電板
１４ａ 集電部
１４ｂ 出力端子
１６ 絶縁板
１８ 端板
２０ 圧縮ばね
２２ 第１バンド部材
２３ 第２バンド部材
２２ａ，２２ｂ，２３ａ，２３ｂ 連結ネジ
２４ａ，２４ｂ バンド係合体
２５ａ，２５ｂ バンド係合ピン
２６ａ，２６ｂ，２７ａ，２７ｂ バンド部材係合部
２８ セル
３０ 配管 DESCRIPTION OF SYMBOLS 10 Fuel cell stack 12 Cell laminated body 14 Current collecting plate 14a Current collecting part 14b Output terminal 16 Insulating plate 18 End plate 20 Compression spring 22 First band member 23 Second band member 22a, 22b, 23a, 23b Connecting screw 24a, 24b Band engaging body 25a, 25b Band engaging pin 26a, 26b, 27a, 27b Band member engaging part 28 Cell 30 Piping

Claims (5)

複数のセルが積層されたセル積層体と、前記セル積層体の前記セルの積層方向の両端に配設された集電板と、さらに前記集電板の端に配設された弾性部材と、前記セル積層体と前記弾性部材とを挾持する一対の端板と、有するセルスタック本体と、
両端部に第１バンド係合部と第２バンド係合部とを有し、前記セルスタック本体の一対の端面と互いに対向する一対の側面とを覆うように前記セルスタック本体の周囲に延在する締結バンドと、を備え、
前記締結バンドは、第１バンド部材と第２バンド部材とから構成され、
前記第１バンド部材の一方の端部には第１バンド部材係合部が設けられ、前記第１バンド部材の他方の端部には第２バンド部材係合部が設けられ、
前記第２バンド部材の一方の端部には第３バンド部材係合部が設けられ、前記第２バンド部材の他方の端部には第４バンド部材係合部が設けられ、
前記第１バンド部材係合部と前記第３バンド部材係合部とが第一のバンド係合体を介して係合され、かつ、
前記第２バンド部材係合部と前記第４バンド部材係合部とが第二のバンド係合体を介して係合することにより、前記セルスタック本体が前記締結バンドにより締結されており、
前記第一及び第二のバンド係合体が絶縁性を有する、燃料電池のセルスタック。 A cell stack in which a plurality of cells are stacked, current collectors disposed at both ends of the cells in the cell stacking direction, and an elastic member disposed at an end of the current collector; A pair of end plates that sandwich the cell laminate and the elastic member, and a cell stack body having
A first band engaging portion and a second band engaging portion are provided at both ends, and extends around the cell stack body so as to cover a pair of end faces of the cell stack body and a pair of side surfaces facing each other. A fastening band to
The fastening band is composed of a first band member and a second band member,
A first band member engaging portion is provided at one end of the first band member, and a second band member engaging portion is provided at the other end of the first band member,
A third band member engaging portion is provided at one end of the second band member, and a fourth band member engaging portion is provided at the other end of the second band member.
The first band member engaging portion and the third band member engaging portion are engaged via a first band engaging body, and
The cell stack body is fastened by the fastening band by engaging the second band member engaging portion and the fourth band member engaging portion via a second band engaging body,
A cell stack of a fuel cell, wherein the first and second band engaging bodies have insulating properties. 前記バンド係合体は表面を絶縁処理した金属である、請求項１に記載の燃料電池のセルスタック。 The cell stack of a fuel cell according to claim 1, wherein the band engaging body is a metal whose surface is insulated. 前記バンド係合体の材質は絶縁性ゴムである、請求項１に記載の燃料電池のセルスタック。 The cell stack of the fuel cell according to claim 1, wherein a material of the band engaging body is an insulating rubber. 前記バンド係合体の材質は樹脂である、請求項１に記載の燃料電池のセルスタック。 The cell stack of the fuel cell according to claim 1, wherein a material of the band engaging body is resin. 前記バンド係合体はピンである、請求項１乃至４いずれかに記載の燃料電池のセルスタック。 The cell stack of a fuel cell according to any one of claims 1 to 4, wherein the band engaging body is a pin.
JP2009129871A 2009-05-29 2009-05-29 Solid polymer fuel cell Pending JP2010277869A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016506047A (en) * 2012-12-21 2016-02-25 インテリジェント エナジー リミテッドＩｎｔｅｌｌｉｇｅｎｔ Ｅｎｅｒｇｙ Ｌｉｍｉｔｅｄ Fuel cell stack assembly and method of assembly
JP2018532235A (en) * 2015-10-16 2018-11-01 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Electrode stack restraint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016506047A (en) * 2012-12-21 2016-02-25 インテリジェント エナジー リミテッドＩｎｔｅｌｌｉｇｅｎｔ Ｅｎｅｒｇｙ Ｌｉｍｉｔｅｄ Fuel cell stack assembly and method of assembly
JP2018532235A (en) * 2015-10-16 2018-11-01 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Electrode stack restraint

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