JP2002280052A - Structure to uniformly apply load on each power generating cell of fuel cell - Google Patents
Structure to uniformly apply load on each power generating cell of fuel cellInfo
- Publication number
- JP2002280052A JP2002280052A JP2001075144A JP2001075144A JP2002280052A JP 2002280052 A JP2002280052 A JP 2002280052A JP 2001075144 A JP2001075144 A JP 2001075144A JP 2001075144 A JP2001075144 A JP 2001075144A JP 2002280052 A JP2002280052 A JP 2002280052A
- Authority
- JP
- Japan
- Prior art keywords
- power generation
- cell
- fuel
- separators
- electrode layer
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数枚の発電セル
を積層して構成された燃料電池の各発電セルに均等に荷
重をかけるための構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for uniformly applying a load to each power generation cell of a fuel cell constituted by stacking a plurality of power generation cells.
【０００２】[0002]
【従来の技術】従来、燃料電池として、発電セルがアノ
ード、固体電解質及びカソードからなり、セパレート板
が上記発電セルに交互に積層され、セパレート板のうち
のリブ付多孔質基材に形成されたリブが燃料ガス及び酸
化剤ガスを上記アノード及びカソードに個別に分配する
ように構成された固体電解質形燃料電池が開示されてい
る（特開平３−１２９６７５号）。この燃料電池では、
上記リブが反応ガスをリブ付多孔質基材の中央部から周
縁部の反応ガス排出口に向って流すように構成される。
また反応ガス排出口はセパレート板と発電セルの積層体
であるスタックの周縁部に均一に分布するように配置さ
れる。更にスタックの中央部には燃料ガス導入管及び酸
化剤ガス導入管が積層方向に貫通して設けられ、これら
の導入管から反応ガスがセパレート板に供給されるよう
に構成される。このように構成された固体電解質形燃料
電池では、反応ガスがスタックの中央部から周縁部に向
って流れるので、発電セルとセパレート板との間のガス
シールが不要になる。また反応ガス排出口から出た反応
ガスは燃料電池の周囲で燃焼するけれども、上記排出口
の分布が均一であるため、燃料電池の周囲の温度は均一
に保たれるようになっている。2. Description of the Related Art Conventionally, as a fuel cell, a power generating cell is composed of an anode, a solid electrolyte and a cathode, and separate plates are alternately laminated on the power generating cell and formed on a ribbed porous substrate of the separate plate. There is disclosed a solid oxide fuel cell in which ribs are configured to distribute fuel gas and oxidizing gas to the anode and the cathode individually (Japanese Patent Application Laid-Open No. 3-129675). In this fuel cell,
The rib is configured to flow the reaction gas from the center of the ribbed porous substrate toward the reaction gas outlet at the periphery.
Further, the reaction gas outlets are arranged so as to be evenly distributed around the periphery of the stack, which is a laminate of the separate plate and the power generation cell. Further, a fuel gas introduction pipe and an oxidizing gas introduction pipe are provided in the center of the stack so as to penetrate in the stacking direction, and the reaction gas is supplied to the separate plate from these introduction pipes. In the solid oxide fuel cell configured as described above, the reaction gas flows from the center of the stack toward the peripheral edge, so that a gas seal between the power generation cell and the separate plate becomes unnecessary. Although the reaction gas discharged from the reaction gas discharge port burns around the fuel cell, the temperature distribution around the fuel cell is kept uniform because the distribution of the discharge port is uniform.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来の特
開平３−１２９６７５号公報に示された固体電解質形燃
料電池では、発電セルとセパレート板とを交互に鉛直方
向に積上げると、燃料電池下部の発電セルに、多くのセ
パレート板及び発電セルの自重が作用することにより大
きな荷重がかかるため、燃料電池下部の発電セルが破損
するおそれがあった。本発明の目的は、下部の発電セル
に大きな荷重がかかるのを阻止することにより、下部の
発電セルの破損を防止できる、燃料電池の各発電セルに
均等に荷重をかける構造を提供することにある。However, in the conventional solid electrolyte fuel cell disclosed in JP-A-3-129675, when the power generation cells and the separate plates are alternately stacked in the vertical direction, Since a large load is applied to the lower power generation cell due to the weight of the separate plates and the power generation cells acting on the lower power generation cell, the power generation cell below the fuel cell may be damaged. An object of the present invention is to provide a structure in which a load is uniformly applied to each power generation cell of a fuel cell, which can prevent a lower power generation cell from being damaged by preventing a large load from being applied to the lower power generation cell. is there.
【０００４】[0004]
【課題を解決するための手段】請求項１に係る発明は、
図１に示すように、固体電解質層１１ａとこの固体電解
質層１１ａの両面に配設された燃料極層１１ｂ及び酸化
剤極層１１ｃとからなる発電セル１１が（ｎ＋１）枚
（ｎは正の整数である。）積層された燃料電池１０であ
って、ｉ番目（ｉ＝１，２，…，ｎ）の発電セル１１の
燃料極層１１ｂとこの燃料極層１１ｂに隣接する（ｉ＋
１）番目の発電セル１１の酸化剤極層１１ｃとの間に導
電性材料により板状に形成されたセパレータ１２がそれ
ぞれ１枚ずつ合計ｎ枚介装され、（ｎ＋１）枚の発電セ
ル１１及びｎ枚のセパレータ１２を積層するときに、ｎ
枚のセパレータ１２が個々に、或いは１枚置きに又は複
数枚置きに固定部材２０により連結部材１８に固定され
たことを特徴とする燃料電池の各発電セルに均等に荷重
をかける構造である。この請求項１に記載された燃料電
池の各発電セルに均等に荷重をかける構造では、（ｎ＋
１）枚の発電セル１１及びｎ枚のセパレータ１２を積層
しても、セパレータ１２が個々に、或いは１枚置きに又
は複数枚置きに固定部材２０により連結部材１８に固定
されているため、燃料電池１０の下部に位置する発電セ
ル１１であっても或いは燃料電池１０の上部に位置する
発電セル１１であっても、各発電セル１１にはその位置
に拘らず比較的小さくかつ略均等な荷重がかかる。According to the first aspect of the present invention,
As shown in FIG. 1, (n + 1) power generation cells 11 each including a solid electrolyte layer 11a and a fuel electrode layer 11b and an oxidant electrode layer 11c disposed on both surfaces of the solid electrolyte layer 11a (where n is a positive This is an integer.) In the stacked fuel cells 10, the fuel electrode layer 11b of the i-th (i = 1, 2,..., N) power generation cell 11 and the adjacent fuel electrode layer 11b (i +
1) A total of n sheets of separators 12 each made of a conductive material are interposed between the oxidant electrode layer 11c of the first power generation cell 11 and the oxidizer electrode layer 11c, and (n + 1) power generation cells 11 and When laminating n separators 12, n
A structure in which a load is evenly applied to each power generation cell of a fuel cell, in which a plurality of separators 12 are fixed to a connecting member 18 by a fixing member 20 individually, every other sheet, or every other sheet. In the structure for uniformly applying a load to each power generation cell of the fuel cell according to the first aspect, (n +
1) Even when the number of power generation cells 11 and the number of separators 12 are stacked, the separators 12 are fixed to the connecting member 18 by the fixing member 20 individually, or alternately or alternately. Regardless of the position of the power generation cell 11 located at the lower part of the battery 10 or the power generation cell 11 located at the upper part of the fuel cell 10, a relatively small and substantially uniform load is applied to each power generation cell 11. It takes.
【０００５】また図１及び図２に示すように、連結部材
１８を、ｎ枚のセパレータ１２の外周部にこれらのセパ
レータ１２の積層方向に電気的に絶縁して挿通し、ｎ枚
のセパレータ１２を個々に、或いは１枚置きに又は複数
枚置きに固定部材２０により連結部材１８に固定した
り、或いは連結部材１８のうち固定部材２０の接触する
部分を平面状に形成することが好ましい。また図１及び
図２に示すように、連結部材１８を、金属製の棒状又は
筒状の芯部１８ａと、この芯部１８ａの外周面を被覆す
る電気絶縁膜１８ｂとにより構成したり、或いは図７及
び図８に示すように、連結部材１１８を、長手方向に延
びる凹溝１１８ｃを有する金属製の棒状の芯部１１８ａ
と、凹溝１１８ｃを除く芯部１１８ａの外周面を被覆す
る電気絶縁膜１１８ｂと、上記凹溝１１８ｃに充填され
電気絶縁材料により形成されかつ固定部材２０が接触可
能な絶縁フィラー１１８ｄとにより構成することができ
る。また図１及び図２に示すように、固定部材２０がセ
パレータ１２にねじ込まれかつ連結部材１８に圧接され
る押しねじであるか、或いは図示しないが固定部材がセ
パレータに打込まれかつ連結部材に圧接されるテーパピ
ンであることが好ましく、更に図示しないが固定部材の
先端に電気絶縁材料により形成された圧接部を固着して
もよい。As shown in FIGS. 1 and 2, a connecting member 18 is inserted through the outer periphery of the n separators 12 while electrically insulating the separators 12 in the laminating direction. It is preferable that the fixing member 20 is fixed to the connecting member 18 individually, every other sheet, or every other sheet, or a portion of the connecting member 18 that contacts the fixing member 20 is formed in a planar shape. As shown in FIGS. 1 and 2, the connecting member 18 is constituted by a metal rod-shaped or cylindrical core 18 a and an electric insulating film 18 b covering the outer peripheral surface of the core 18 a, or As shown in FIGS. 7 and 8, the connecting member 118 is formed by a metal rod-shaped core portion 118 a having a concave groove 118 c extending in the longitudinal direction.
And an electric insulating film 118b covering the outer peripheral surface of the core portion 118a excluding the concave groove 118c, and an insulating filler 118d filled in the concave groove 118c, formed of an electric insulating material, and capable of contacting the fixing member 20. be able to. As shown in FIGS. 1 and 2, the fixing member 20 is a push screw screwed into the separator 12 and pressed against the connecting member 18, or, though not shown, the fixing member is driven into the separator and is connected to the connecting member. It is preferable that the tapered pin be pressed. Further, although not shown, a pressure contact portion formed of an electrically insulating material may be fixed to the tip of the fixing member.
【０００６】請求項９に係る発明は、図４に示すよう
に、固体電解質層１１ａとこの固体電解質層１１ａの両
面に配設された燃料極層１１ｂ及び酸化剤極層１１ｃと
からなる発電セル１１が（ｎ＋１）枚（ｎは正の整数で
ある。）積層された燃料電池５０であって、ｉ番目（ｉ
＝１，２，…，ｎ）の発電セル１１の燃料極層１１ｂと
この燃料極層１１ｂに隣接する（ｉ＋１）番目の発電セ
ル１１の酸化剤極層１１ｃとの間に導電性材料により板
状に形成されたセパレータ５２がそれぞれ１枚ずつ合計
ｎ枚介装され、（ｎ＋１）枚の発電セル１１及びｎ枚の
セパレータ５２が積層された状態でケース５８に収容さ
れ、このケース５８がｎ枚のセパレータ５２の外周縁に
接近して積層方向に延びかつ互いに対向する一対の保持
壁５８ｂ，５８ｂを有し、（ｎ＋１）枚の発電セル１１
及びｎ枚のセパレータ５２をケース５８に収容するとき
に、ｎ枚のセパレータ５２が個々に、或いは１枚置きに
又は複数枚置きに、固定部材６０により一対の保持壁５
８ｂ，５８ｂに固定されたことを特徴とする燃料電池の
各発電セルに均等に荷重をかける構造である。As shown in FIG. 4, the invention according to claim 9 is a power generation cell comprising a solid electrolyte layer 11a and a fuel electrode layer 11b and an oxidizer electrode layer 11c disposed on both surfaces of the solid electrolyte layer 11a. Reference numeral 11 denotes a fuel cell 50 in which (n + 1) (n is a positive integer) stacked fuel cells, and the i-th fuel cell 50 (i.
= 1, 2,..., N) between the fuel electrode layer 11b of the power generation cell 11 and the oxidant electrode layer 11c of the (i + 1) -th power generation cell 11 adjacent to the fuel electrode layer 11b by using a conductive material. A total of n pieces of separators 52 formed in a shape are interposed one by one, and are housed in a case 58 in a state where (n + 1) pieces of power generation cells 11 and n pieces of separators 52 are stacked. A pair of holding walls 58b, 58b extending in the laminating direction near the outer peripheral edge of the two separators 52 and facing each other, and (n + 1) power generation cells 11
When the n separators 52 are accommodated in the case 58, the n separators 52 are individually or alternately or alternately arranged by the fixing member 60 so as to form a pair of holding walls 5.
8b and 58b, wherein a load is evenly applied to each power generation cell of the fuel cell.
【０００７】この請求項９に記載された燃料電池の各発
電セルに均等に荷重をかける構造では、（ｎ＋１）枚の
発電セル１１及びｎ枚のセパレータ５２を積層しても、
セパレータ５２が個々に、或いは１枚置きに又は複数枚
置きに固定部材６０により一対の保持壁５８ｂ，５８ｂ
に固定されているため、燃料電池５０の下部に位置する
発電セル１１であっても或いは燃料電池５０の上部に位
置する発電セル１１であっても、各発電セル１１にはそ
の位置に拘らず比較的小さくかつ略均等な荷重がかか
る。また図４及び図５に示すように、固定部材６０が保
持壁５８ｂにねじ込まれ、かつセパレータ５２の外周面
に圧接される押しねじであるか、或いは図示しないが固
定部材が保持壁に打込まれ、かつセパレータの外周面に
圧接されるテーパピンであることが好ましい。In the structure according to the ninth aspect, in which the load is evenly applied to each power generation cell of the fuel cell, even if (n + 1) power generation cells 11 and n number of separators 52 are stacked,
The separators 52 are individually, or alternately or alternately, fixed by the fixing member 60 to form a pair of holding walls 58b, 58b.
Irrespective of the position of the power generation cell 11, regardless of the position of the power generation cell 11 located at the lower part of the fuel cell 50 or the power generation cell 11 located at the upper part of the fuel cell 50. A relatively small and substantially uniform load is applied. As shown in FIGS. 4 and 5, the fixing member 60 is a push screw that is screwed into the holding wall 58b and pressed against the outer peripheral surface of the separator 52, or the fixing member is driven into the holding wall (not shown). It is preferable that the tapered pin be rare and be pressed against the outer peripheral surface of the separator.
【０００８】[0008]
【発明の実施の形態】次に本発明の第１の実施の形態を
図面に基づいて説明する。図１及び図２に示すように、
発電セル１１は円板状の固体電解質層１１ａと、この固
体電解質層１１ａの両面に配設された円板状の燃料極層
１１ｂ及び空気極層１１ｃ（酸化剤極層）とからなり、
燃料電池１０は上記発電セル１１を（ｎ＋１）枚積層す
ることにより構成される。ここで、ｎは正の整数であ
る。上からｉ番目（ｉ＝１，２，…，ｎ）の発電セル１
１の燃料極層１１ｂとこの燃料極層１１ｂに隣接する上
から（ｉ＋１）番目の発電セル１１の空気極層１１ｃと
の間には導電性材料により形成されたセパレータ１２が
それぞれ１枚ずつ合計ｎ枚介装される。また上からｉ番
目の発電セル１１の燃料極層１１ｂと上からｊ番目（ｊ
＝１，２，…，ｎ）のセパレータ１２との間には円板状
に形成されかつ導電性を有する多孔質の燃料極集電体１
３が介装され、上から（ｉ＋１）番目の発電セル１１の
空気極層１１ｃと上からｊ番目のセパレータ１２との間
には円板状に形成されかつ導電性を有する多孔質の空気
極集電体１４（酸化剤極集電体）が介装される。更に上
から１番目（最上段）の発電セル１１の空気極層１１ｃ
には空気極集電体１４を介して導電性材料により形成さ
れた単一の空気用端板１６（酸化剤用端板）が積層さ
れ、上から（ｎ＋１）番目（最下段）の発電セル１１の
燃料極層１１ｂには燃料極集電体１３を介して導電性材
料により形成された単一の燃料用端板１７が積層され
る。上記セパレータ１２、空気用端板１６及び燃料用端
板１７は燃料極層１１ｂ等より一回り大きな正方形板状
にそれぞれ形成される。但し、セパレータ１２の４つの
コーナ部、空気用端板１６の４つのコーナ部及び燃料用
端板１７の４つのコーナ部はエッジがそれぞれ除去され
る、即ち面取りが施される。なお、固体電解質層、燃料
極層、空気極層、燃料極集電体及び空気極集電体は円板
状ではなく、四角形板状、六角形板状、八角形板状等の
多角形板状に形成してもよい。また、セパレータ、空気
用端板及び燃料用端板は正方形板状ではなく、円板状、
或いは長方形板状、六角形板状、八角形板状等の多角形
板状に形成してもよい。更に上からｊ番目のセパレータ
とは、上からｉ番目の発電セルと上から（ｉ＋１）番目
の発電セルとの間に位置するセパレータを意味する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2,
The power generation cell 11 includes a disc-shaped solid electrolyte layer 11a, and a disc-shaped fuel electrode layer 11b and an air electrode layer 11c (oxidant electrode layer) disposed on both surfaces of the solid electrolyte layer 11a.
The fuel cell 10 is configured by stacking (n + 1) power generation cells 11 described above. Here, n is a positive integer. I-th (i = 1, 2,..., N) power generation cell 1 from the top
One separator 12 made of a conductive material is provided between each of the first fuel electrode layer 11b and the air electrode layer 11c of the (i + 1) th power generation cell 11 from the top adjacent to this fuel electrode layer 11b. n sheets are interposed. The fuel electrode layer 11b of the i-th power generation cell 11 from the top and the j-th (j
= 1, 2,..., N) between the separator 12 and a porous fuel electrode current collector 1 having a disc shape and having conductivity
3 is provided between the air electrode layer 11c of the (i + 1) -th power generation cell 11 from the top and the j-th separator 12 from the top, and has a disc-shaped porous air electrode having conductivity. A current collector 14 (an oxidant electrode current collector) is interposed. The air electrode layer 11c of the first (uppermost) power generation cell 11 from above
Is stacked with a single air end plate 16 (oxidant end plate) formed of a conductive material via an air electrode current collector 14, and the (n + 1) th (lowest) power generation cell from the top A single fuel end plate 17 made of a conductive material is stacked on the fuel electrode layer 11b of the fuel cell 11 with a fuel electrode current collector 13 interposed therebetween. The separator 12, the air end plate 16 and the fuel end plate 17 are each formed in a square plate shape which is slightly larger than the fuel electrode layer 11b and the like. However, the four corners of the separator 12, the four corners of the air end plate 16, and the four corners of the fuel end plate 17 have their edges removed, that is, chamfered. The solid electrolyte layer, the fuel electrode layer, the air electrode layer, the fuel electrode current collector, and the air electrode current collector are not disc-shaped, but are polygonal plates such as rectangular plates, hexagonal plates, and octagonal plates. It may be formed in a shape. In addition, the separator, the end plate for air and the end plate for fuel are not square plate, but disk-shaped,
Alternatively, it may be formed in a polygonal plate shape such as a rectangular plate shape, a hexagonal plate shape, and an octagonal plate shape. Further, the j-th separator from the top means a separator located between the i-th power generation cell from the top and the (i + 1) -th power generation cell from the top.
【０００９】固体電解質層１１ａは次の一般式（１）等
で示される酸化物イオン伝導体により形成される。 Ｌｎ１ Ａ Ｇａ Ｂ１ Ｂ２ Ｂ３ Ｏ ……（１） 燃料極層１１ｂはＮｉ等の金属により多孔質に形成さ
れ、更に空気極層１１ｃは次の一般式（２）等で示され
る酸化物イオン伝導体により多孔質に形成される。 Ｌｎ２1-x Ｌｎ３x Ｅ1-y Ｃｏy Ｏ3+d ……（２） 上記一般式（１）において、Ｌｎ１はＬａ，Ｃｅ，Ｐ
ｒ，Ｎｄ及びＳｍからなる群より選ばれた１種又は２種
以上の元素であり、ＡはＳｒ，Ｃａ及びＢａからなる群
より選ばれた１種又は２種以上の元素であり、Ｂ１はＭ
ｇ，Ａｌ及びＩｎからなる群より選ばれた１種又は２種
以上の元素であり、Ｂ２はＣｏ，Ｆｅ，Ｎｉ及びＣｕか
らなる群より選ばれた１種又は２種以上の元素であり、
Ｂ３はＡｌ，Ｍｇ，Ｃｏ，Ｎｉ，Ｆｅ，Ｃｕ，Ｚｎ，Ｍ
ｎ及びＺｒからなる群より選ばれた１種又は２種以上の
元素である。また上記一般式（２）において、Ｌｎ２は
Ｌａ又はＳｍのいずれか一方又は双方の元素であり、Ｌ
ｎ３はＢａ，Ｃａ又はＳｒのいずれか一方又は双方の元
素であり、ＥはＦｅ又はＣｕのいずれか一方又は双方の
元素である。なお、固体電解質層をイオン交換樹脂膜に
より形成し、燃料極層及び空気極層を触媒金属粉末若し
くは白金担持カーボン粉末とポリテトラフルオロエチレ
ンとイオン交換樹脂との混合物により形成してもよい。The solid electrolyte layer 11a is formed of an oxide ion conductor represented by the following general formula (1). Ln1AGaB1B2B3O (1) The fuel electrode layer 11b is formed of a porous material such as Ni, and the air electrode layer 11c is an oxide ion conductor represented by the following general formula (2) or the like. Is formed porous. Ln2 1-x Ln3 x E 1 -y Co y O 3 + d ...... (2) In the above general formula (1), Ln1 is La, Ce, P
A is one or more elements selected from the group consisting of r, Nd and Sm, A is one or two or more elements selected from the group consisting of Sr, Ca and Ba, and B1 is M
g, Al and In are one or more elements selected from the group consisting of In, B2 is one or two or more elements selected from the group consisting of Co, Fe, Ni and Cu;
B3 is Al, Mg, Co, Ni, Fe, Cu, Zn, M
One or more elements selected from the group consisting of n and Zr. In the general formula (2), Ln2 is one or both elements of La and Sm.
n3 is one or both elements of Ba, Ca or Sr, and E is one or both elements of Fe or Cu. The solid electrolyte layer may be formed of an ion exchange resin membrane, and the fuel electrode layer and the air electrode layer may be formed of a catalyst metal powder or a mixture of platinum-supporting carbon powder, polytetrafluoroethylene, and an ion exchange resin.
【００１０】セパレータ１２、空気用端板１６及び燃料
用端板１７はステンレス鋼、ニッケル基合金又はクロム
基合金により形成される。また燃料極集電体１３はステ
ンレス鋼、ニッケル基合金又はクロム基合金、或いはニ
ッケル、銀又は銅により多孔質に形成され、空気極集電
体１４はステンレス鋼、ニッケル基合金又はクロム基合
金、或いは銀又は白金により多孔質に形成される。The separator 12, the air end plate 16 and the fuel end plate 17 are made of stainless steel, nickel-based alloy or chromium-based alloy. The anode current collector 13 is made of stainless steel, nickel-based alloy or chromium-based alloy, or nickel, silver or copper, and the cathode electrode current collector 14 is made of stainless steel, nickel-based alloy or chromium-based alloy, Alternatively, it is formed porous with silver or platinum.
【００１１】セパレータ１２の４つのコーナ部、空気用
端板１６の４つのコーナ部及び燃料用端板１７の４つの
コーナ部には、連結部材１８を挿通可能な通孔１２ａ，
１６ａ，１７ａがそれぞれ形成される。連結部材１８は
金属製の棒状の芯部１８ａと、この芯部１８ａの外周面
を被覆する電気絶縁膜１８ｂとにより構成される。芯部
１８ａはステンレス鋼、ニッケル基合金又はクロム基合
金により形成され、電気絶縁膜１８ｂはアルミナ短繊維
の集合体（以下、アルミナウールという）や、セラミッ
クの筒状体により形成される。上記のように芯部１８ａ
の外周面を電気絶縁膜１８ｂにて被覆することにより、
連結部材１８をセパレータ１２の通孔１２ａ、空気用端
板１６の通孔１６ａ及び燃料用端板１７の通孔１７ａに
挿通したときにセパレータ１２、空気用端板１６及び燃
料用端板１７がそれぞれ電気的に絶縁されるようになっ
ている。また芯部１８ａの下端には雄ねじ１８ｃが形成
され、この雄ねじ１８ｃは燃料電池１０を載せるベース
板１９の４つのねじ孔１９ａにそれぞれ螺合可能に構成
される。The four corners of the separator 12, the four corners of the air end plate 16, and the four corners of the fuel end plate 17 have through holes 12 a through which a connecting member 18 can be inserted.
16a and 17a are respectively formed. The connecting member 18 includes a metal rod-shaped core 18a and an electric insulating film 18b covering the outer peripheral surface of the core 18a. The core portion 18a is formed of stainless steel, a nickel-based alloy, or a chromium-based alloy, and the electrical insulating film 18b is formed of an aggregate of alumina short fibers (hereinafter, referred to as alumina wool) or a ceramic cylindrical body. Core 18a as described above
Is covered with an electric insulating film 18b,
When the connecting member 18 is inserted into the through hole 12a of the separator 12, the through hole 16a of the air end plate 16 and the through hole 17a of the fuel end plate 17, the separator 12, the air end plate 16 and the fuel end plate 17 Each is electrically insulated. A male screw 18c is formed at the lower end of the core portion 18a, and the male screw 18c is configured to be screwed into four screw holes 19a of the base plate 19 on which the fuel cell 10 is mounted.
【００１２】またセパレータ１２の４つのコーナ部、空
気用端板１６の４つのコーナ部及び燃料用端板１７の４
つのコーナ部には、外周面から通孔１２ａ，１６ａ，１
７ａに臨みかつ押しねじ２０を螺合可能なねじ孔１２
ｂ，１６ｂ，１７ｂがそれぞれ形成される。押しねじ２
０はステンレス鋼、ニッケル基合金又はクロム基合金に
より形成されるか、或いはセラミックにより形成され
る。連結部材１８の外周面のうち上記ねじ孔１２ｂ，１
６ｂ，１７ｂに対向する側の外周面は平面状に形成され
る。これにより押しねじ２０の先端が連結部材１８に対
して面接触するので、押しねじ２０の緩みを防止できる
とともに、押しねじ２０の締付け時の過大な圧力により
電気絶縁膜１８ｂが損傷するのを防止できる。The four corners of the separator 12, the four corners of the air end plate 16, and the four corners of the fuel end plate 17.
One of the corners has through holes 12a, 16a, 1
7a and a screw hole 12 in which the push screw 20 can be screwed.
b, 16b, and 17b are respectively formed. Push screw 2
O is made of stainless steel, nickel-based alloy or chromium-based alloy, or made of ceramic. In the outer peripheral surface of the connecting member 18, the screw holes 12b, 1
The outer peripheral surface on the side facing 6b, 17b is formed in a planar shape. As a result, the tip of the push screw 20 comes into surface contact with the connecting member 18, so that the looseness of the push screw 20 can be prevented and the electrical insulating film 18 b is prevented from being damaged by excessive pressure when the push screw 20 is tightened. it can.
【００１３】なお、連結部材の芯部は棒状ではなく筒状
であってもよい。またセパレータ、空気用端板及び燃料
用端板の各通孔は互いに対向する２つのコーナ部に形成
してもよい。この場合、ねじ孔もセパレータ、空気用端
板及び燃料用端板にそれぞれ２つずつ形成される。また
セパレータ、空気用端板及び燃料用端板の各通孔はコー
ナ部以外の外周部に形成してもよく、固定部材がセパレ
ータに打込まれかつ連結部材に圧接されるテーパピンで
あってもよい。更に固定部材の先端に電気絶縁材料によ
り形成された圧接部を固着してもよい。この場合、圧接
部は緻密なアルミナ等により形成され、この圧接部を固
定部材の先端に接着剤を用いて固定される。この接着剤
は燃料電池が作動する高温雰囲気になると気化してしま
うけれども、圧接部は固定部材と連結部材とにより挟持
されているので、ずれたり或いは外れたりすることはな
い。The core of the connecting member may be cylindrical instead of rod-shaped. In addition, the through holes of the separator, the end plate for air, and the end plate for fuel may be formed in two corner portions facing each other. In this case, two screw holes are formed in each of the separator, the air end plate, and the fuel end plate. Further, each through hole of the separator, the end plate for air and the end plate for fuel may be formed in the outer peripheral portion other than the corner portion, and the fixing member may be a tapered pin that is driven into the separator and pressed against the connecting member. Good. Further, a pressure contact portion formed of an electrically insulating material may be fixed to the tip of the fixing member. In this case, the press contact portion is formed of dense alumina or the like, and the press contact portion is fixed to the tip of the fixing member using an adhesive. Although this adhesive is vaporized in a high-temperature atmosphere in which the fuel cell operates, since the pressure contact portion is sandwiched between the fixing member and the connecting member, it does not shift or come off.
【００１４】一方、セパレータ１２には、隣接する燃料
極層１１ｂの中央に燃料ガスを供給するセパレータ用燃
料通路１２ｃと、隣接する空気極層１１ｃの中央に空気
（酸化剤ガス）を供給するセパレータ用空気通路１２ｄ
とが形成される。セパレータ用燃料通路１２ｃの入口に
は燃料供給パイプ（図示せず）が接続され、セパレータ
用空気通路１２ｄの入口には空気供給パイプ（図示せ
ず）が接続される。また空気用端板１６には空気極層１
１ｃの中央に空気を供給する端板用空気通路１６ｃが形
成され、燃料用端板１７には燃料極層１１ｂの中央に燃
料ガスを供給する端板用燃料通路１７ｃが形成される。
端板用空気通路１６ｃの入口には空気供給パイプ（図示
せず）が接続され、端板用燃料通路１７ｃの入口には燃
料供給パイプ（図示せず）が接続される。なお、上記ベ
ース板１９はステンレス鋼などの金属材料により形成さ
れ、燃料用端板１７とベース板１９との間にはアルミナ
ウール等の電気絶縁材料により形成された絶縁シート
（図示せず）が介装される。On the other hand, the separator 12 has a separator fuel passage 12c for supplying fuel gas to the center of the adjacent fuel electrode layer 11b, and a separator for supplying air (oxidizing gas) to the center of the adjacent air electrode layer 11c. Air passage 12d
Are formed. A fuel supply pipe (not shown) is connected to an inlet of the separator fuel passage 12c, and an air supply pipe (not shown) is connected to an inlet of the separator air passage 12d. The air electrode layer 1 is provided on the end plate 16 for air.
An end plate air passage 16c for supplying air is formed in the center of 1c, and an end plate fuel passage 17c for supplying fuel gas to the center of the fuel electrode layer 11b is formed in the fuel end plate 17.
An air supply pipe (not shown) is connected to an inlet of the end plate air passage 16c, and a fuel supply pipe (not shown) is connected to an inlet of the end plate fuel passage 17c. The base plate 19 is formed of a metal material such as stainless steel, and an insulating sheet (not shown) formed of an electrically insulating material such as alumina wool is provided between the fuel end plate 17 and the base plate 19. Interposed.
【００１５】このように構成された燃料電池１０の組立
手順を説明する。予め固体電解質層１１ａの両面に燃料
極層１１ｂ及び空気極層１１ｃをそれぞれ焼付けて発電
セル１１を組立ておく。またセパレータ１２の上面及び
燃料用端板１７の上面に燃料極集電体１３をそれぞれ接
合し、セパレータ１２の下面及び空気用端板１６の下面
に空気極集電体１４をそれぞれ接合しておく。The procedure for assembling the fuel cell 10 configured as described above will be described. The fuel cell layer 11 is assembled by previously baking the fuel electrode layer 11b and the air electrode layer 11c on both surfaces of the solid electrolyte layer 11a. Also, the anode current collector 13 is joined to the upper surface of the separator 12 and the top surface of the fuel end plate 17, respectively, and the cathode current collector 14 is joined to the lower surface of the separator 12 and the bottom surface of the air end plate 16. .
【００１６】先ずベース板１９の４つのねじ孔１９ａに
４本の連結部材１８の芯部１８ａ下端の雄ねじ１８ｃを
それぞれ螺合することにより、ベース板１９に４本の連
結部材１８を立設する。次いで絶縁シート（図示せず）
を介して燃料用端板１７の４つの通孔１７ａを４本の連
結部材１８に遊嵌することにより、ベース板１９上に燃
料用端板１７を載せる。この状態で燃料用端板１７の４
つのねじ孔１７ｂに４本の押しねじ２０をそれぞれ螺合
し、これらの押しねじ２０の先端を連結部材１８の外周
面に所定の圧力で押付ける。これにより燃料用端板１７
が連結部材１８に固定される。次に燃料用端板１７上に
発電セル１１を載せた後に、セパレータ１２の４つの通
孔１２ａを４本の連結部材１８に遊嵌することにより、
発電セル１１上にセパレータ１２を載せる。この状態で
セパレータ１２の４つのねじ孔１２ｂに４本の押しねじ
２０をそれぞれ螺合し、これらの押しねじ２０の先端を
連結部材１８の外周面に所定の圧力で押付ける。これに
よりセパレータ１２が連結部材１８に固定される。First, four connecting members 18 are erected on the base plate 19 by screwing male screws 18c at the lower ends of the core portions 18a of the four connecting members 18 into the four screw holes 19a of the base plate 19, respectively. . Next, an insulating sheet (not shown)
The fuel end plate 17 is placed on the base plate 19 by loosely fitting the four through holes 17a of the fuel end plate 17 into the four connecting members 18 through the. In this state, the fuel end plate 17-4
Four push screws 20 are screwed into the respective screw holes 17b, and the tips of these push screws 20 are pressed against the outer peripheral surface of the connecting member 18 with a predetermined pressure. Thereby, the fuel end plate 17
Are fixed to the connecting member 18. Next, after the power generation cell 11 is placed on the fuel end plate 17, the four through holes 12 a of the separator 12 are loosely fitted to the four connection members 18,
The separator 12 is placed on the power generation cell 11. In this state, four push screws 20 are screwed into the four screw holes 12 b of the separator 12, and the tips of the push screws 20 are pressed against the outer peripheral surface of the connecting member 18 with a predetermined pressure. Thereby, the separator 12 is fixed to the connecting member 18.
【００１７】同様に発電セル１１とセパレータ１２を交
互に積層し、その都度セパレータ１２を押しねじ２０で
連結部材に固定する。ｎ枚の発電セル１１とｎ枚のセパ
レータ１２とを積層した後に、最上段のセパレータ１２
上に最上段の発電セル１１を載せ、更に空気用端板１６
の４つの通孔１６ａを４本の連結部材１８に遊嵌するこ
とにより、発電セル１１上に空気用端板１６を載せる。
この状態で空気用端板１６の４つのねじ孔１６ｂに４本
の押しねじ２０をそれぞれ螺合し、これらの押しねじ２
０の先端を連結部材１８の外周面に所定の圧力で押付け
る。これにより空気用端板１６が連結部材１８に固定さ
れる。Similarly, the power generation cells 11 and the separators 12 are alternately laminated, and each time the separators 12 are fixed to the connecting member with the set screws 20. After laminating n power generation cells 11 and n separators 12, the uppermost separator 12
The uppermost power generation cell 11 is placed on top, and the air end plate 16
The air end plate 16 is placed on the power generation cell 11 by loosely fitting the four through holes 16 a into the four connecting members 18.
In this state, four push screws 20 are screwed into the four screw holes 16b of the air end plate 16, respectively.
0 is pressed against the outer peripheral surface of the connecting member 18 with a predetermined pressure. As a result, the air end plate 16 is fixed to the connecting member 18.
【００１８】このように組立てられた燃料電池１０で
は、セパレータ１２、空気用端板１６及び燃料用端板１
７が個々に押しねじ２０により連結部材１８に固定され
ているため、燃料電池１０の下部に位置する発電セル１
１であっても或いは燃料電池１０の上部に位置する発電
セル１１であっても、各発電セル１１にはその位置に拘
らず比較的小さくかつ略均等な荷重がかかる。この結
果、各発電セル１１には過大な荷重がかかることがない
ため、発電セル１１が破損するのを防止できる。In the fuel cell 10 thus assembled, the separator 12, the air end plate 16 and the fuel end plate 1
7 are individually fixed to the connecting member 18 by the set screws 20, so that the power generation cells 1
1 or the power generation cells 11 located above the fuel cell 10, a relatively small and substantially uniform load is applied to each power generation cell 11 regardless of its position. As a result, since an excessive load is not applied to each power generation cell 11, damage to the power generation cell 11 can be prevented.
【００１９】なお、この実施の形態では、固定部材とし
て押しねじを挙げたが、テーパピンでもよい。この場
合、セパレータの４つのコーナ部、空気用端板の４つの
コーナ部及び燃料用端板の４つのコーナ部に、外周面か
ら通孔に臨みかつテーパピンを挿入可能なテーパ孔がそ
れぞれ形成され、テーパピンの先端が連結部材の外周面
に圧接されることにより、セパレータ等が連結部材に固
定される。In this embodiment, the fixing member is a push screw, but may be a taper pin. In this case, tapered holes are formed in the four corners of the separator, the four corners of the end plate for air, and the four corners of the end plate for fuel. By pressing the tip of the tapered pin against the outer peripheral surface of the connecting member, the separator and the like are fixed to the connecting member.
【００２０】図３は本発明の第２の実施の形態を示す。
図３において図１と同一符号は同一部品を示す。この実
施の形態では、積層されたｎ枚のセパレータ１２が１枚
置きに押しねじ２０により連結部材１８に固定される。
上記以外は第１の実施の形態と同一に構成される。この
ように構成された燃料電池３０では、第１の実施の形態
より押しねじ２０の本数や、セパレータ１２に形成され
るねじ孔１２ａの総数が少なくて済むので、部品点数、
加工工数及び組立工数を低減できる。上記以外の作用は
第１の実施の形態と略同様であるので、繰返しの説明を
省略する。なお、積層されたｎ枚のセパレータを２枚置
きに、或いは３枚以上置きに押しねじにより連結部材に
固定してもよい。FIG. 3 shows a second embodiment of the present invention.
3, the same reference numerals as those in FIG. 1 indicate the same parts. In this embodiment, the stacked n sheets of separators 12 are fixed to the connecting member 18 by the push screws 20 every other sheet.
Except for the above, the configuration is the same as that of the first embodiment. In the fuel cell 30 configured as described above, the number of the set screws 20 and the total number of the screw holes 12a formed in the separator 12 are smaller than those in the first embodiment.
Processing man-hours and assembly man-hours can be reduced. The operation other than the above is substantially the same as that of the first embodiment, and thus the repeated description is omitted. Note that the stacked n separators may be fixed to the connecting member by pressing screws every two or three or more sheets.
【００２１】図４及び図５は本発明の第３の実施の形態
を示す。図４及び図５において図１及び図２と同一符号
は同一部品を示す。この実施の形態では、燃料電池５０
がケース５８に収容される。このケース５８は燃料電池
５０が載るベース部５８ａと、ベース部５８ａに立設さ
れかつ互いに対向する一対の保持壁５８ｂ，５８ｂと、
ベース部５８ａに立設され一対の保持壁５８ｂ，５８ｂ
の両側縁を連結する一対の連結壁５８ｃ，５８ｃとを有
する。一対の保持壁５８ｂ，５８ｂはｎ枚のセパレータ
５２、単一の空気用端板５６及び単一の燃料用端板５７
の外周縁に接近して鉛直方向に延びて設けられる。また
これらの保持壁５８ｂ，５８ｂには、発電セル１１、セ
パレータ５２、燃料極集電体１３、空気極集電体１４、
空気用端板５６及び燃料用端板５７を積層した状態で、
各セパレータ５２の両側面、空気用端板５６の両側面及
び燃料用端板５７の両側面に対向する位置に、所定の間
隔をあけて押しねじ６０を螺合可能なねじ孔５８ｄが２
つずつそれぞれ形成される。上記ケース５８はステンレ
ス鋼などの金属材料により形成され、燃料用端板１７と
ベース部５８ａとの間にはアルミナウール等の電気絶縁
材料により形成された絶縁シート（図示せず）が介装さ
れる。FIGS. 4 and 5 show a third embodiment of the present invention. 4 and 5, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. In this embodiment, the fuel cell 50
Are accommodated in the case 58. The case 58 includes a base portion 58a on which the fuel cell 50 is mounted, a pair of holding walls 58b, 58b erected on the base portion 58a and facing each other.
A pair of holding walls 58b, 58b erected on the base portion 58a
And a pair of connecting walls 58c, 58c that connect both side edges of the connecting member. The pair of holding walls 58b, 58b are composed of n separators 52, a single air end plate 56 and a single fuel end plate 57.
Is provided so as to extend in the vertical direction close to the outer peripheral edge of the main body. The power generation cell 11, the separator 52, the fuel electrode current collector 13, the air electrode current collector 14,
With the air end plate 56 and the fuel end plate 57 stacked,
Two screw holes 58d are formed at positions facing both sides of each separator 52, both sides of the end plate for air 56, and both sides of the end plate 57 for fuel.
Each is formed one by one. The case 58 is made of a metal material such as stainless steel, and an insulating sheet (not shown) made of an electrically insulating material such as alumina wool is interposed between the fuel end plate 17 and the base portion 58a. You.
【００２２】上記押しねじ６０はステンレス鋼等の金属
により形成され上記ねじ孔５８ｄに螺合する雄ねじ部６
０ａと、雄ねじ部６０ａの先端に固着されセラミック等
の電気絶縁材料により形成された圧接部６０ｂとを有す
る。図５の符号５８ｅ及び５８ｆは一対の連結壁５８
ｃ，５８ｃにそれぞれ形成された開口部であり、開口部
５８ｅには図示しない燃料供給パイプが遊挿され、開口
部５８ｆには図示しない空気供給パイプが遊挿される。
上記以外は第１の実施の形態と同一に構成される。The push screw 60 is formed of a metal such as stainless steel and the male screw portion 6 screwed into the screw hole 58d.
0a and a press contact portion 60b fixed to the tip of the male screw portion 60a and formed of an electrically insulating material such as ceramic. Reference numerals 58e and 58f in FIG.
The fuel supply pipe (not shown) is loosely inserted into the opening 58e, and the air supply pipe (not shown) is loosely inserted into the opening 58f.
Except for the above, the configuration is the same as that of the first embodiment.
【００２３】このように構成された燃料電池５０の組立
手順を説明する。予め固体電解質層１１ａの両面に燃料
極層１１ｂ及び空気極層１１ｃをそれぞれ焼付けて発電
セル１１を組立ておく。またセパレータ５２の上面及び
燃料用端板５７の上面に燃料極集電体１３をそれぞれ接
合し、セパレータ５２の下面及び空気用端板５６の下面
に空気極集電体１４をそれぞれ接合しておく。The procedure for assembling the fuel cell 50 thus configured will be described. The fuel cell layer 11 is assembled by previously baking the fuel electrode layer 11b and the air electrode layer 11c on both surfaces of the solid electrolyte layer 11a. Further, the anode current collector 13 is joined to the upper surface of the separator 52 and the top surface of the fuel end plate 57, respectively, and the cathode current collector 14 is joined to the lower surface of the separator 52 and the bottom surface of the air end plate 56, respectively. .
【００２４】先ずケース５８内のベース部５８ａ上に絶
縁シート（図示せず）を介して燃料用端板５７を載せ
る。この状態で一対の保持壁５８ｂ，５８ｂにそれぞれ
形成されかつ燃料用端板５７の両側面に臨む２つずつの
ねじ孔５８ｄ、合計４つのねじ孔５８ｄに４本の押しね
じ６０をそれぞれ螺合し、これらの押しねじ６０の先端
を燃料用端板５７の両側面に所定の圧力で押付ける。こ
れにより燃料用端板５７が一対の保持壁５８ｂ，５８ｂ
に固定される。次に燃料用端板５７上に発電セル１１を
載せた後に、セパレータ５２を発電セル１１上に載せ
る。この状態で一対の保持壁５８ｂ，５８ｂにそれぞれ
形成されかつセパレータ５２の両側面に臨む２つずつの
ねじ孔５８ｄ、合計４つのねじ孔５８ｄに４本の押しね
じ６０をそれぞれ螺合し、これらの押しねじ６０の先端
をセパレータ５２の両側面に所定の圧力で押付ける。こ
れによりセパレータ５２が一対の保持壁５８ｂ，５８ｂ
に固定される。First, a fuel end plate 57 is placed on a base 58a in a case 58 via an insulating sheet (not shown). In this state, four push screws 60 are respectively screwed into a total of four screw holes 58d formed on the pair of holding walls 58b, 58b and facing both side surfaces of the fuel end plate 57, respectively. Then, the tips of the set screws 60 are pressed against both side surfaces of the fuel end plate 57 with a predetermined pressure. As a result, the fuel end plate 57 is connected to the pair of holding walls 58b, 58b.
Fixed to Next, after the power generation cell 11 is mounted on the fuel end plate 57, the separator 52 is mounted on the power generation cell 11. In this state, four push screws 60 are respectively screwed into a total of four screw holes 58d formed on the pair of holding walls 58b, 58b and facing the both side surfaces of the separator 52, respectively. Of the set screw 60 is pressed against both side surfaces of the separator 52 with a predetermined pressure. As a result, the separator 52 is connected to the pair of holding walls 58b, 58b.
Fixed to
【００２５】同様に発電セル１１とセパレータ５２を交
互に積層し、その都度セパレータ５２を押しねじ６０で
一対の保持壁５８ｂ，５８ｂに固定する。ｎ枚の発電セ
ル１１とｎ枚のセパレータ５２とを積層した後に、最上
段のセパレータ５２上に最上段の発電セル１１を載せ、
更にこの発電セル１１上に空気用端板５６を載せる。こ
の状態で一対の保持壁５８ｂ，５８ｂにそれぞれ形成さ
れかつ空気用端板５６の両側面に臨む２つずつのねじ孔
５８ｄ、合計４つのねじ孔５８ｄに４本の押しねじ６０
をそれぞれ螺合し、これらの押しねじ６０の先端を空気
用端板５６の両側面に所定の圧力で押付ける。これによ
り空気用端板５６が一対の保持壁５８ｂ，５８ｂに固定
される。Similarly, the power generation cells 11 and the separators 52 are alternately stacked, and each time the separators 52 are fixed to the pair of holding walls 58b, 58b with the set screw 60. After laminating the n number of power generation cells 11 and the n number of separators 52, the uppermost power generation cell 11 is placed on the uppermost separator 52,
Further, the air end plate 56 is placed on the power generation cell 11. In this state, four screw holes 58d are formed on the pair of holding walls 58b and 58b and face each side surface of the air end plate 56.
Are screwed into each other, and the tips of the push screws 60 are pressed against both side surfaces of the air end plate 56 with a predetermined pressure. As a result, the air end plate 56 is fixed to the pair of holding walls 58b, 58b.
【００２６】このように組立てられた燃料電池５０で
は、セパレータ５２、空気用端板５６及び燃料用端板５
７が個々に押しねじ６０により一対の保持壁５８ｂ，５
８ｂに固定されているため、燃料電池５０の下部に位置
する発電セル１１であっても或いは燃料電池５０の上部
に位置する発電セル１１であっても、各発電セル１１に
はその位置に拘らず比較的小さくかつ略均等な荷重がか
かる。この結果、各発電セル１１には過大な荷重がかか
ることがないため、発電セル１１が破損するのを防止で
きる。In the fuel cell 50 thus assembled, the separator 52, the air end plate 56 and the fuel end plate 5
7 are individually held by a pair of holding screws 58 b, 5
8b, the power generation cell 11 located at the lower part of the fuel cell 50 or the power generation cell 11 located at the upper part of the fuel cell 50 is attached to each power generation cell 11 regardless of its position. Relatively small and a substantially uniform load is applied. As a result, since an excessive load is not applied to each power generation cell 11, damage to the power generation cell 11 can be prevented.
【００２７】なお、上記第２の実施の形態では、固定部
材として押しねじを挙げたが、テーパピンでもよい。こ
の場合、一対の保持壁には、発電セル、セパレータ、燃
料極集電体、空気極集電体、空気用端板及び燃料用端板
を積層した状態で、各セパレータの両側面、空気用端板
の両側面及び燃料用端板の両側面に対向する位置に、所
定の間隔をあけて上記テーパピンを挿入可能なテーパ孔
が２つずつそれぞれ形成され、テーパピンの先端がセパ
レータ等の側面に圧接されることにより、セパレータ等
が一対の保持壁に固定される。In the second embodiment, a set screw is used as the fixing member, but a tapered pin may be used. In this case, in a state where the power generation cell, the separator, the fuel electrode current collector, the air electrode current collector, the end plate for air and the end plate for fuel are laminated on the pair of holding walls, both sides of each separator, the air Two taper holes into which the taper pins can be inserted at predetermined intervals are formed at positions opposite to both side surfaces of the end plate and both side surfaces of the fuel end plate, respectively. By being pressed, the separator and the like are fixed to the pair of holding walls.
【００２８】図６は本発明の第４の実施の形態を示す。
図６において図４と同一符号は同一部品を示す。この実
施の形態では、積層されたｎ枚のセパレータ５２が１枚
置きに押しねじ６０により一対の保持壁５８ｂ，５８ｂ
に固定される。上記以外は第３の実施の形態と同一に構
成される。このように構成された燃料電池８０では、第
３の実施の形態より押しねじ６０の本数や、一対の保持
壁５８ｂ，５８ｂに形成されるねじ孔５８ｄの総数が少
なくて済むので、部品点数、加工工数及び組立工数を低
減できる。上記以外の作用は第３の実施の形態と略同様
であるので、繰返しの説明を省略する。なお、積層され
たｎ枚のセパレータを２枚置きに、或いは３枚以上置き
に押しねじにより一対の保持壁に固定してもよい。FIG. 6 shows a fourth embodiment of the present invention.
6, the same reference numerals as those in FIG. 4 indicate the same parts. In this embodiment, a stack of n separators 52 is provided with a pair of holding walls 58b,
Fixed to Except for the above, the configuration is the same as that of the third embodiment. In the fuel cell 80 configured as described above, the number of the push screws 60 and the total number of the screw holes 58d formed in the pair of holding walls 58b, 58b are smaller than in the third embodiment. Processing man-hours and assembly man-hours can be reduced. The operation other than the above is substantially the same as that of the third embodiment, and thus the repeated description is omitted. Note that the stacked n sheets of separators may be fixed to a pair of holding walls by a push screw every two or three or more sheets.
【００２９】図７及び図８は本発明の第５の実施の形態
を示す。図７及び図８において図１及び図２と同一符号
は同一部品を示す。この実施の形態では、連結部材１１
８が、長手方向に延びる凹溝１１８ｃを有する金属製の
棒状の芯部１１８ａと、凹溝１１８ｃを除く芯部１１８
ａの外周面を被覆する電気絶縁膜１１８ｂと、凹溝１１
８ｃに充填された絶縁フィラー１１８ｄとにより構成さ
れる。電気絶縁膜１１８ｂはアルミナウール等の電気絶
縁材料により形成され、絶縁フィラー１１８ｄはアルミ
ナウール等の電気絶縁材料を比較的大きな圧力で充填す
ることにより形成される。また絶縁フィラー１１８ｄの
露出面には押しねじ２０の先端が接触するように構成さ
れ、この露出面は平面状に形成される。これにより押し
ねじ２０の先端が絶縁フィラー１１８ｄに対して面接触
するので、押しねじ２０の緩みを防止できる。上記以外
は第１の実施の形態と同一に構成される。FIGS. 7 and 8 show a fifth embodiment of the present invention. 7 and 8, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. In this embodiment, the connecting member 11
8 is a metal rod-shaped core portion 118a having a concave groove 118c extending in the longitudinal direction, and a core portion 118 excluding the concave groove 118c.
a electrical insulating film 118b covering the outer peripheral surface of the groove 11a;
8c is filled with the insulating filler 118d. The electric insulating film 118b is formed of an electric insulating material such as alumina wool, and the insulating filler 118d is formed by filling an electric insulating material such as alumina wool with a relatively large pressure. The tip of the set screw 20 is configured to contact the exposed surface of the insulating filler 118d, and the exposed surface is formed in a planar shape. As a result, the tip of the push screw 20 comes into surface contact with the insulating filler 118d, so that the looseness of the push screw 20 can be prevented. Except for the above, the configuration is the same as that of the first embodiment.
【００３０】このように構成された燃料電池では、押し
ねじ２０を絶縁フィラー１１８ｄに比較的大きな力で圧
接しても、絶縁フィラー１１８ｄが芯部１１８ａの凹溝
１１８ｃに収容された堅牢な構造であるため、絶縁フィ
ラー１１８ｄが変形したり、或いは損傷することはな
い。上記以外の動作は第１の実施の形態の燃料電池と略
同様であるので、繰返しの説明を省略する。なお、上記
第１〜第５の実施の形態では、酸化剤ガスとして空気を
用いたが、酸素又はその他の酸化剤ガスを用いてもよ
い。In the fuel cell configured as described above, even if the set screw 20 is pressed against the insulating filler 118d with a relatively large force, the insulating filler 118d has a robust structure housed in the concave groove 118c of the core 118a. Therefore, the insulating filler 118d is not deformed or damaged. Operations other than those described above are substantially the same as those of the fuel cell according to the first embodiment, and a description thereof will not be repeated. In the first to fifth embodiments, air is used as the oxidizing gas, but oxygen or another oxidizing gas may be used.
【００３１】[0031]
【発明の効果】以上述べたように、本発明によれば、
（ｎ＋１）枚の発電セル及びｎ枚のセパレータを積層す
るときに、ｎ枚のセパレータを個々に、或いは１枚置き
に又は複数枚置きに固定部材により連結部材に固定した
ので、燃料電池の下部に位置する発電セルであっても或
いは燃料電池の上部に位置する発電セルであっても、各
発電セルにはその位置に拘らず比較的小さくかつ略均等
な荷重がかかる。この結果、各発電セルには過大な荷重
がかかることがないので、発電セルが破損するのを防止
できる。As described above, according to the present invention,
When (n + 1) number of power generation cells and n number of separators are stacked, the n number of separators are fixed to the connecting member by the fixing member individually, or alternately or alternately, so that the lower part of the fuel cell , Or a power generation cell located above the fuel cell, a relatively small and substantially uniform load is applied to each power generation cell regardless of its position. As a result, since no excessive load is applied to each power generation cell, it is possible to prevent the power generation cells from being damaged.
【００３２】また（ｎ＋１）枚の発電セル及びｎ枚のセ
パレータをケースに収容するときに、ｎ枚のセパレータ
を個々に、或いは１枚置きに又は複数枚置きに固定部材
により一対の保持壁に固定すれば、上記と同様に、燃料
電池の下部に位置する発電セルであっても或いは燃料電
池の上部に位置する発電セルであっても、各発電セルに
はその位置に拘らず比較的小さくかつ略均等な荷重がか
かる。この結果、上記と同様に、各発電セルには過大な
荷重がかかることがないので、発電セルが破損するのを
防止できる。When (n + 1) number of power generation cells and n number of separators are accommodated in a case, the n number of separators are individually or alternately placed on a pair of holding walls by a fixing member. If fixed, the power generation cells located at the lower part of the fuel cell or the power generation cells located at the upper part of the fuel cell are relatively small regardless of their positions, as described above. In addition, a substantially uniform load is applied. As a result, similarly to the above, since an excessive load is not applied to each power generation cell, it is possible to prevent the power generation cells from being damaged.
【図１】本発明第１実施形態の燃料電池を示す図２のＡ
−Ａ線断面図。FIG. 1A shows a fuel cell according to a first embodiment of the present invention; FIG.
-A line sectional drawing.
【図２】図１のＢ−Ｂ線断面図。FIG. 2 is a sectional view taken along line BB of FIG. 1;
【図３】本発明の第２実施形態を示す図１に対応する断
面図。FIG. 3 is a sectional view showing a second embodiment of the present invention and corresponding to FIG. 1;
【図４】本発明第３実施形態の燃料電池を示す図５のＣ
−Ｃ線断面図。FIG. 4C shows a fuel cell according to a third embodiment of the present invention;
-C sectional drawing.
【図５】図４のＤ−Ｄ線断面図。FIG. 5 is a sectional view taken along line DD of FIG. 4;
【図６】本発明の第４実施形態を示す図４に対応する断
面図。FIG. 6 is a sectional view showing a fourth embodiment of the present invention and corresponding to FIG. 4;
【図７】本発明の第５実施形態を示す図８のＥ−Ｅ線断
面図。FIG. 7 is a sectional view taken along line EE of FIG. 8, showing a fifth embodiment of the present invention.
【図８】図７のＦ−Ｆ線断面図。FIG. 8 is a sectional view taken along line FF of FIG. 7;
１０，３０，５０，８０ 燃料電池 １１ 発電セル １１ａ 固体電解質層 １１ｂ 燃料極層 １１ｃ 空気極層（酸化剤極層） １２，５２ セパレータ １８，１１８ 連結部材 １８ａ，１１８ａ 芯部 １８ｂ，１１８ｂ 電気絶縁膜 ２０，６０ 押しねじ（固定部材） ５８ ケース ５８ｂ 保持壁 １１８ｃ 凹溝 １１８ｄ 絶縁フィラー 10, 30, 50, 80 Fuel cell 11 Power generation cell 11a Solid electrolyte layer 11b Fuel electrode layer 11c Air electrode layer (oxidant electrode layer) 12,52 Separator 18,118 Connecting member 18a, 118a Core 18b, 118b Electric insulating film 20, 60 Push screw (fixing member) 58 Case 58b Holding wall 118c Groove 118d Insulating filler
Claims (11)
(11a)の両面に配設された燃料極層(11b)及び酸化剤極層
(11c)とからなる発電セル(11)が（ｎ＋１）枚（ｎは正
の整数である。）積層された燃料電池であって、 ｉ番目（ｉ＝１，２，…，ｎ）の発電セル(11)の燃料極
層(11b)とこの燃料極層(11b)に隣接する（ｉ＋１）番目
の発電セル(11)の酸化剤極層(11c)との間に導電性材料
により板状に形成されたセパレータ(12)がそれぞれ１枚
ずつ合計ｎ枚介装され、 前記（ｎ＋１）枚の発電セル(11)及び前記ｎ枚のセパレ
ータ(12)を積層するときに、前記ｎ枚のセパレータ(12)
が個々に、或いは１枚置き又は複数枚置きに、固定部材
(20)により連結部材(18)に固定されたことを特徴とする
燃料電池の各発電セルに均等に荷重をかける構造。1. A solid electrolyte layer (11a) and the solid electrolyte layer
Fuel electrode layer (11b) and oxidizer electrode layer disposed on both sides of (11a)
A fuel cell in which (n + 1) (n is a positive integer) power generation cells (11) composed of (11c) are stacked, and i-th (i = 1, 2,..., N) power generation A plate made of a conductive material is formed between the fuel electrode layer (11b) of the cell (11) and the oxidant electrode layer (11c) of the (i + 1) -th power generation cell (11) adjacent to the fuel electrode layer (11b). When n (n + 1) power generation cells (11) and the n separators (12) are stacked, the n Separator (12)
Can be fixed individually or every other or multiple
A structure for equally applying a load to each power generation cell of a fuel cell, wherein the power generation cell is fixed to the connecting member (18) by (20).
外周部にこれらのセパレータ(12)の積層方向に電気的に
絶縁されて挿通され、前記ｎ枚のセパレータ(12)が個々
に、或いは１枚置きに又は複数枚置きに固定部材(20)に
より前記連結部材(18)に固定された請求項１記載の燃料
電池の各発電セルに均等に荷重をかける構造。2. A connecting member (18) is inserted around the outer periphery of the n separators (12) while being electrically insulated in the laminating direction of the separators (12), and the n separators (12) are The structure for equally applying a load to each power generation cell of the fuel cell according to claim 1, wherein the power generation cells of the fuel cell are fixed to the connecting member (18) individually, every other sheet, or every other sheet by a fixing member (20).
する部分が平面状に形成された請求項１又は２記載の燃
料電池の各発電セルに均等に荷重をかける構造。3. The structure according to claim 1 or 2, wherein a portion of the connecting member (18) in contact with the fixing member (20) is formed in a flat shape.
の芯部(18a)と、この芯部(18a)の外周面を被覆する電気
絶縁膜(18b)とにより構成された請求項１ないし３いず
れか記載の燃料電池の各発電セルに均等に荷重をかける
構造。4. The connecting member (18) includes a metal rod-shaped or cylindrical core (18a) and an electric insulating film (18b) covering the outer peripheral surface of the core (18a). A structure for equally applying a load to each power generation cell of the fuel cell according to any one of claims 1 to 3.
溝(118c)を有する金属製の棒状の芯部(118a)と、前記凹
溝(118c)を除く前記芯部(118a)の外周面を被覆する電気
絶縁膜(118b)と、前記凹溝(118c)に充填され電気絶縁材
料により形成されかつ固定部材(20)が接触可能な絶縁フ
ィラー(118d)とにより構成された請求項１ないし３いず
れか記載の燃料電池の各発電セルに均等に荷重をかける
構造。5. A connecting member (118) comprising a metal rod-shaped core (118a) having a longitudinally extending groove (118c), and a core (118a) excluding the groove (118c). An electric insulating film (118b) covering the outer peripheral surface, and an insulating filler (118d) formed of an electric insulating material filled in the concave groove (118c) and capable of contacting the fixing member (20). 4. A structure for equally applying a load to each power generation cell of the fuel cell according to any one of 1 to 3.
まれかつ連結部材(18)に圧接される押しねじである請求
項１ないし５いずれか記載の燃料電池の各発電セルに均
等に荷重をかける構造。6. The fuel cell according to claim 1, wherein the fixing member is a push screw that is screwed into the separator and pressed against the connecting member. Structure to apply load.
結部材に圧接されるテーパピンである請求項１ないし５
いずれか記載の燃料電池の各発電セルに均等に荷重をか
ける構造。7. The fixing member according to claim 1, wherein the fixing member is a tapered pin that is driven into the separator and pressed against the connecting member.
A structure for equally applying a load to each power generation cell of the fuel cell according to any one of the above.
成された圧接部が固着された請求項６又は７記載の燃料
電池の各発電セルに均等に荷重をかける構造。8. The structure for equally applying a load to each power generation cell of a fuel cell according to claim 6, wherein a pressure contact portion formed of an electrically insulating material is fixed to a tip of the fixing member.
(11a)の両面に配設された燃料極層(11b)及び酸化剤極層
(11c)とからなる発電セル(11)が（ｎ＋１）枚（ｎは正
の整数である。）積層された燃料電池であって、 ｉ番目（ｉ＝１，２，…，ｎ）の発電セル(11)の燃料極
層(11b)とこの燃料極層(11b)に隣接する（ｉ＋１）番目
の発電セル(11)の酸化剤極層(11c)との間に導電性材料
により板状に形成されたセパレータ(52)がそれぞれ１枚
ずつ合計ｎ枚介装され、 前記（ｎ＋１）枚の発電セル(11)及び前記ｎ枚のセパレ
ータが積層された状態でケース(58)に収容され、 前記ケース(58)が前記ｎ枚のセパレータ(52)の外周縁に
接近して積層方向に延びかつ互いに対向する一対の保持
壁(58b,58b)を有し、 前記（ｎ＋１）枚の発電セル(11)及び前記ｎ枚のセパレ
ータを前記ケース(58)に収容するときに、前記ｎ枚のセ
パレータ(52)が個々に、或いは１枚置きに又は複数枚置
きに、固定部材(60)により前記一対の保持壁(58b,58b)
に固定されたことを特徴とする燃料電池の各発電セルに
均等に荷重をかける構造。9. Solid electrolyte layer (11a) and this solid electrolyte layer
Fuel electrode layer (11b) and oxidizer electrode layer disposed on both sides of (11a)
A fuel cell in which (n + 1) (n is a positive integer) power generation cells (11) composed of (11c) are stacked, and i-th (i = 1, 2,..., N) power generation A plate made of a conductive material is formed between the fuel electrode layer (11b) of the cell (11) and the oxidant electrode layer (11c) of the (i + 1) -th power generation cell (11) adjacent to the fuel electrode layer (11b). A total of n sheets of the separators (52) are interposed one by one, and the (n + 1) sheets of the power generation cells (11) and the n sheets of the separators are stacked and housed in a case (58). The case (58) has a pair of holding walls (58b, 58b) extending in the laminating direction near the outer peripheral edge of the n separators (52) and facing each other, and the (n + 1) power generators When accommodating the cell (11) and the n sheets of separators in the case (58), the n sheets of separators (52) are fixed individually, or every other sheet or every other sheet. The pair of retaining walls by wood (60) (58b, 58b)
A structure for equally applying a load to each power generation cell of a fuel cell, wherein the power generation cell is fixed to the power generation cell.
まれ、かつセパレータ(52)の外周面に圧接される押しね
じである請求項９記載の燃料電池の各発電セルに均等に
荷重をかける構造。10. The fuel cell according to claim 9, wherein the fixing member (60) is a push screw screwed into the holding wall (58b) and pressed against the outer peripheral surface of the separator (52). Structure to apply load.
パレータの外周面に圧接されるテーパピンである請求項
９記載の燃料電池の各発電セルに均等に荷重をかける構
造。11. The structure according to claim 9, wherein the fixing member is a tapered pin driven into the holding wall and pressed against the outer peripheral surface of the separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075144A JP2002280052A (en) | 2001-03-16 | 2001-03-16 | Structure to uniformly apply load on each power generating cell of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075144A JP2002280052A (en) | 2001-03-16 | 2001-03-16 | Structure to uniformly apply load on each power generating cell of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002280052A true JP2002280052A (en) | 2002-09-27 |
Family
ID=18932264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001075144A Withdrawn JP2002280052A (en) | 2001-03-16 | 2001-03-16 | Structure to uniformly apply load on each power generating cell of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002280052A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006004678A (en) * | 2004-06-15 | 2006-01-05 | Ngk Spark Plug Co Ltd | Solid electrolyte type fuel cell |
| US7482087B2 (en) | 2003-12-26 | 2009-01-27 | Honda Motor Co., Ltd. | Fuel cell |
| WO2010125945A1 (en) | 2009-04-27 | 2010-11-04 | 本田技研工業株式会社 | Fuel cell module |
| US8709672B2 (en) | 2009-04-27 | 2014-04-29 | Honda Motor Co., Ltd. | Fuel cell module |
-
2001
- 2001-03-16 JP JP2001075144A patent/JP2002280052A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7482087B2 (en) | 2003-12-26 | 2009-01-27 | Honda Motor Co., Ltd. | Fuel cell |
| US7491460B2 (en) | 2003-12-26 | 2009-02-17 | Honda Motor Co., Ltd. | Fuel cell and fuel cell stack |
| JP2006004678A (en) * | 2004-06-15 | 2006-01-05 | Ngk Spark Plug Co Ltd | Solid electrolyte type fuel cell |
| JP4658524B2 (en) * | 2004-06-15 | 2011-03-23 | 日本特殊陶業株式会社 | Solid electrolyte fuel cell |
| WO2010125945A1 (en) | 2009-04-27 | 2010-11-04 | 本田技研工業株式会社 | Fuel cell module |
| US8709672B2 (en) | 2009-04-27 | 2014-04-29 | Honda Motor Co., Ltd. | Fuel cell module |
| US9379407B2 (en) | 2009-04-27 | 2016-06-28 | Honda Motor Co., Ltd. | Fuel cell module |
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| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
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