JPH0367466A - Seal structure for solid electrolyte fuel cell - Google Patents
Seal structure for solid electrolyte fuel cellInfo
- Publication number
- JPH0367466A JPH0367466A JP1202646A JP20264689A JPH0367466A JP H0367466 A JPH0367466 A JP H0367466A JP 1202646 A JP1202646 A JP 1202646A JP 20264689 A JP20264689 A JP 20264689A JP H0367466 A JPH0367466 A JP H0367466A
- Authority
- JP
- Japan
- Prior art keywords
- section
- seal
- sealing
- solid electrolyte
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 38
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 238000010248 power generation Methods 0.000 claims description 32
- 239000000565 sealant Substances 0.000 claims description 27
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 19
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000003792 electrolyte Substances 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000155 melt Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- NFYLSJDPENHSBT-UHFFFAOYSA-N chromium(3+);lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[La+3] NFYLSJDPENHSBT-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固体電解質燃料電池の高温がスシール部の構造
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a high-temperature seal portion of a solid electrolyte fuel cell.
本発明は固体電解質電解装置や固体電解質酸素センサー
等の固体電解質のイオノ導電性を利用する機器全般に利
用できる。The present invention can be used in general devices that utilize the ionoconductivity of solid electrolytes, such as solid electrolyte electrolyzers and solid electrolyte oxygen sensors.
平板形の固体電解質燃料電池は、例えば第４図に示すよ
うな構造となる０発電部１は、燃料電極２、固体電解質
（以下電解質という）３釦よび酸素電極４の３層の固体
層を接合積層した構造となる０発電部１は、燃料流路５
と酸素流路６とにはさまれ、燃料電極側は燃料流路を通
る燃料に、酸素電極側は酸素流路を通る酸素あるいは空
気に曝される位置に配置される。発電部１の縁は１発電
部支持構造体７で、支持される。固体電解質燃料電池は
、発電部１を直列あるいは並列に複数個接合して発電ユ
ニットを構成することが多い。複数の発電部１を接合す
る場合は、隣接する発電部１０間に電気を導通する機能
と燃料流路５を流れる燃料と酸素流路６を流れる酸素あ
るいは空気との２種のガスを隔離する機能とを有するイ
ンタコネクタ部８を設ける。インタコネクタ部８は燃料
流路渡り部９．ガス隔離部１０．釦よび酸素流路渡シ部
１ノで構成される。ガス隔離部１０は縁部でインタコネ
クタ部支持構造体１２で支持される。A flat plate solid electrolyte fuel cell has a structure as shown in FIG. The power generation unit 1 having a bonded and laminated structure has a fuel flow path 5.
and the oxygen flow path 6, and is placed at a position where the fuel electrode side is exposed to the fuel passing through the fuel flow path, and the oxygen electrode side is exposed to oxygen or air passing through the oxygen flow path. The edges of the power generation section 1 are supported by a power generation section support structure 7. In solid electrolyte fuel cells, a power generation unit is often constructed by connecting a plurality of power generation sections 1 in series or in parallel. When a plurality of power generation sections 1 are connected, the function is to conduct electricity between adjacent power generation sections 10 and to isolate two types of gases: fuel flowing through the fuel flow path 5 and oxygen or air flowing through the oxygen flow path 6. An interconnector section 8 having the following functions is provided. The interconnector section 8 includes a fuel flow path crossing section 9. Gas isolation section 10. It consists of a button and an oxygen flow path crossing section. The gas separator 10 is supported at the edges by an interconnect support structure 12 .
燃料と酸素あるいは空気と會隔離する部分の接合部には
ガスシールの機能を持つ材料・接合法を用いる必要があ
る。第４図の例では発電部１と発電部支持構造体７との
間の接合部、インタコネクタ（がス隔離部）Ｊ（＋とイ
ンタコネクタ部支持構造体１２との間の接合部１発電部
支持構造体７とインタコネクタ部支持構造体１２との間
の接合部、が、ガスシール機能を必要とする接合部に該
当する。It is necessary to use materials and bonding methods that have a gas sealing function for the joints of the parts that isolate the fuel and oxygen or air. In the example shown in FIG. The joint between the interconnector support structure 7 and the interconnector support structure 12 corresponds to a joint that requires a gas sealing function.
固体電解質燃料電池は８００℃〜１１００℃の高温で運
転されることが多い。高温で運転されかつ酸化雰囲気に
曝されるため発電部支持構造体７およびインタコネクタ
部支持構造体１２には金属を用いることが困難で、酸化
物系セラミックスの焼結体を用いることが多い。筐た発
電部１の構造的骨格を形成する電解質３は、例えばイツ
トリア安定化シリコニアのような酸化物系セラミックス
であることが多い。また、インクコネクタ（ガス隔離部
）１０には例えばランタンクロマイト（ＬａＣｒＯ３）
のような電子導電性を持つセラミックスを用いることが
多い。この場合、ガスシールの機能を要する接合部は異
種セラミックス相互間の接合となる。Solid electrolyte fuel cells are often operated at high temperatures of 800°C to 1100°C. Since they are operated at high temperatures and exposed to an oxidizing atmosphere, it is difficult to use metal for the power generation section support structure 7 and the interconnector section support structure 12, and sintered bodies of oxide ceramics are often used. The electrolyte 3 forming the structural framework of the power generating section 1 is often an oxide-based ceramic such as yttria-stabilized siliconia. In addition, the ink connector (gas isolation part) 10 is made of, for example, lanthanum chromite (LaCrO3).
Ceramics with electronic conductivity, such as , are often used. In this case, the joint that requires a gas sealing function is a joint between different types of ceramics.
各々のセラミックス材料は、熱膨張率が必ずしも一致し
てｋらず、また、運転状態では温度の不均一も生じ得る
ので、部品により熱膨張による伸びは異なる。熱膨張の
異なるセラミックスを剛に接合すると、部材内に熱応力
が発生し１発電部１が破損するかそれがある。そのため
、接合部では。Each ceramic material does not necessarily have the same coefficient of thermal expansion, and non-uniformity in temperature may occur during operating conditions, so elongation due to thermal expansion differs depending on the component. If ceramics having different thermal expansions are rigidly joined, thermal stress will be generated within the members and the power generation section 1 may be damaged or damaged. Therefore, at the joint.
変位拘束をできるだけ少なくするようにすることが望ま
しい。It is desirable to minimize displacement constraints as much as possible.
第４図の例での発電部縁のシール部１３、インタコネク
タ部縁のシール部１４、支持構造体相互間のシール部１
５のような接合部ではガス・シールの機能を有し、かつ
変位拘束のできるだけ少ないような接合材料接合法を採
用する必要がある。In the example shown in FIG. 4, the seal portion 13 on the edge of the power generation section, the seal portion 14 on the edge of the interconnector portion, and the seal portion 1 between the supporting structures
For joints such as No. 5, it is necessary to adopt a joining method using a joining material that has a gas sealing function and minimizes displacement restriction as much as possible.
従来の構造としては、接合部にセラミックス接着剤を塗
布し焼付ける構造がとられているがセラミックス接着剤
は、焼付ける時に多孔質体になるために、変位拘束は比
較的弱くなり、がスシールの機能は十分ではない。The conventional structure is to apply ceramic adhesive to the joint and bake it, but since ceramic adhesive becomes porous when baked, displacement restraint is relatively weak, making it difficult to seal. function is not sufficient.
また、接合部に釉薬を塗布する方法もとられることがあ
るが、釉薬はガラス系の材料で運転温度付近では溶融し
、運転時には液体となる。そのため変位拘束はほとんど
なくがスシールの機能もすぐれているが、長時間使用し
ているうちに流失してガスシール機能をそこなう訃それ
がある。また、液体となるので、滴下するような場所に
は使用できず、水平面内での接合に限られる。Alternatively, a method of applying glaze to the joint may be used, but the glaze is a glass-based material that melts near the operating temperature and becomes liquid during operation. Therefore, there is almost no displacement restriction and the gas seal function is excellent, but there is a risk that the gas seal function will be lost due to water loss after long-term use. Also, since it is a liquid, it cannot be used in places where it will drip, and is limited to joining in a horizontal plane.
他方電解質の板は製造時にうねり波うちが生ずることが
あり、液体シール単独使用の場合、１面程度以上の大き
なすき壕があると液体シール剤の溶融液膜が破断し、が
スシールの機能を維持することができなくなるかそれが
ある。そのため電解質の板のうねり波うちを液膜破断が
生じない８度に抑えることが必要となり、を解質板製造
時の品質管理基準を高めたり、平坦度金玉げるための矯
５正工程を追加することが必要になる。On the other hand, electrolyte plates may cause undulations during manufacturing, and if a liquid seal is used alone, if there is a large groove on one side or more, the molten liquid film of the liquid sealant will break and the seal will no longer function. It may become impossible to maintain it. Therefore, it is necessary to suppress the undulation of the electrolyte plate to 8 degrees, which does not cause liquid film breakage, and to improve the quality control standards when manufacturing the electrolyte plate, and to improve the flatness of the plate. It will be necessary to add.
また、燃料ガスと、酸素または空気ガスとの間に差圧が
あると液体シール剤が吹き飛びやすく、運転時に差圧を
最小限に抑えるような制御が必要となる。Further, if there is a pressure difference between the fuel gas and oxygen or air gas, the liquid sealant is likely to be blown away, and control to minimize the pressure difference during operation is required.
本発明はこれらの問題を解決する燃料電池のシール構造
を提供することを目的とする。An object of the present invention is to provide a seal structure for a fuel cell that solves these problems.
本発明に係る固体電解質燃料電池のシール構造は。 The seal structure of the solid electrolyte fuel cell according to the present invention is as follows.
（１）燃料電極２と固体電解質３と酸素電極４からなる
発電部１とインタコネクタ部８１に具備する燃料電池に
おいて１発電部１と発電部支持構造体７の接合部訃よび
インタコネクタ部８とインタコネクタ部支持構造体１２
の接合部のいずれかのシール構造としてシール部の下層
には充填剤を塗布し、シール部の表面には液体シール剤
ｔ−塗布することによυシールすることを％徴とする。(1) In a fuel cell equipped with a power generation section 1 consisting of a fuel electrode 2, a solid electrolyte 3, and an oxygen electrode 4, and an interconnector section 81, the junction between the power generation section 1 and the power generation section support structure 7 and the interconnector section 8 and interconnector support structure 12
As a sealing structure for any of the joints, a filler is applied to the lower layer of the sealing part, and a liquid sealant is applied to the surface of the sealing part to form a seal.
（２）前記（１）の固体電解質燃料電池のシール構造に
おいて、シール部に充填剤と液体シール剤を予め混合し
て塗布することによりシールすることを特徴とする。(2) The solid electrolyte fuel cell seal structure of (1) above is characterized in that sealing is achieved by applying a mixture of a filler and a liquid sealant to the seal portion in advance.
（３）前記（１）又は（２）の固体電解質燃料電池のシ
ール構造において、充填剤には多孔質の接着剤を使用し
、液体シール剤には釉薬および高温運転時に液体状にな
る金属のいずれかを使用することを特徴とする。(3) In the seal structure of the solid electrolyte fuel cell described in (1) or (2) above, a porous adhesive is used as the filler, and a glaze and a metal that becomes liquid during high-temperature operation are used as the liquid sealant. It is characterized by the use of either.
（４）前記（３）の固体電解質燃料電池のシール構造に
おいて、接合部のシール構造として、液体シール剤を保
持するための液体溜めを設けることを特徴とする。(4) In the seal structure for a solid electrolyte fuel cell as described in (3) above, the seal structure for the joint portion is characterized in that a liquid reservoir for holding a liquid sealant is provided.
（１）第２図に示すようにセラミックス接着剤のような
多孔質の充填剤は、焼きつけられると、多孔質の骨格と
なり、接合部の比較的大きなすき間を埋める。釉薬のよ
うな液体シール剤は、常温では粉状の固体で、充填剤の
表層あるいは内部に存在している。運転時に８００℃〜
１１００℃程度の高温にすると、液体シール剤が溶融し
、充填剤骨格の細孔に浸透し１表層を埋める。そこで両
者を併用することにより骨格が多孔質であるので接合部
の変位拘束は比較的弱くなう、各部品の破損を防止し、
液体シール剤が多孔質骨格の細孔を埋めるので、液体シ
ール剤単独使用の場合と同様にガスシールの機能を確保
できる。筐た。多孔質骨格が、液体シール剤の担持体と
して機能するので、液体シール剤の流失が抑制されるの
で長時間の使用み耐えるようになる。また、担持体があ
るために、鉛直な接合線に対しても適用てきる。(1) As shown in FIG. 2, when a porous filler such as a ceramic adhesive is baked, it becomes a porous skeleton and fills a relatively large gap in the joint. A liquid sealant such as a glaze is a powdery solid at room temperature, and exists on the surface or inside the filler. 800℃~ during operation
When the temperature is raised to a high temperature of about 1100° C., the liquid sealant melts, penetrates into the pores of the filler skeleton, and fills the first surface layer. Therefore, by using both together, since the skeleton is porous, the displacement restraint of the joint is relatively weak, preventing damage to each part,
Since the liquid sealant fills the pores of the porous skeleton, the gas sealing function can be ensured in the same way as when the liquid sealant is used alone. It was a cabinet. Since the porous skeleton functions as a carrier for the liquid sealant, the liquid sealant is prevented from flowing away, so that it can be used for a long time. Furthermore, since there is a carrier, it can also be applied to vertical joining lines.
（２） がスシールを必要とする接合部すなわち発電
部縁のシール部、インタコネクタ部縁のシール部、及び
支持構造体相互間のシール部に、それぞれ液体溜めを設
け、常温の状態で、各液体溜めに、ガラス系釉薬あるい
は常温では固体であるが運転温度付近で溶融し液体とな
る金属を液体シール剤として充填するため運転時には液
体シール剤が溶融し、液体溜めを満たし、毛細管現象に
よりがスシールを必要とする接合部のすき１１−埋めが
スシールの機能を持つようになる。そして、液体溜めが
あることによう液体シール剤が安定に保持され。(2) Liquid reservoirs are provided at the joints where seals are required, that is, the seals at the edges of the power generation section, the seals at the edges of the interconnector, and the seals between the supporting structures, and each The liquid reservoir is filled with a glass-based glaze or a metal that is solid at room temperature but melts and becomes liquid near the operating temperature as a liquid sealant. During operation, the liquid sealant melts and fills the liquid reservoir, causing capillary action. Filling the gap 11 at a joint that requires a seal has the function of a seal. The presence of the liquid reservoir ensures that the liquid sealant is stably retained.
また燃料ガスと酸素あるいは空気がスとの間の差圧変動
等によシすき筐の液体シール剤が一時的に喪失しても、
毛細管現象により液体溜めからすきまに自動的に液体シ
ール剤が補給され、長時間にわたって良好ながスシール
機能全維持することができる。In addition, even if the liquid sealant in the casing is temporarily lost due to fluctuations in the differential pressure between the fuel gas and oxygen or air,
Liquid sealing agent is automatically replenished from the liquid reservoir into the gap due to capillary action, making it possible to maintain good sealing function over a long period of time.
また、運転時には、発電部等と発電部支持構造体等との
間が液体シール剤を介して接触するため、発電部等と発
電部支持構造体等との間の変位拘束はほとんどない。そ
のため熱膨張率の異なる材料の使用が可能になる。Furthermore, during operation, since the power generation section and the power generation section support structure and the like come into contact via the liquid sealant, there is almost no displacement restriction between the power generation section and the power generation section support structure and the like. This allows the use of materials with different coefficients of thermal expansion.
本発明の実施例を第１図〜第３図に示す。 Examples of the present invention are shown in FIGS. 1 to 3.
第１図は本発明の第１実施例を示す。第１図にかいて電
解質３は１例えばイツトリア安定化ジルフェアの厚さ０
．０１〜１ｍ程度の板である。電解質３と発電部支持構
造体７との間等のがスシール機能を必要とする接合部に
は、本発明のシール構造が適用できる。シール部の下層
にはセラミックス接着剤のような充填材を焼きつけて製
造する多孔質骨格１６がある。骨格を製造するのに使用
する接着剤はできるだけ電解質３や発電部支持構造体７
と熱膨張率が近いことが望ましい。多孔質骨格１６の表
層にはガラス系釉薬のような液体シール剤１７を塗布す
る。この液体シール剤１７は運転時には溶融して、多孔
質骨格１６０表層及び内部に浸透し、担持される。FIG. 1 shows a first embodiment of the invention. In Figure 1, the electrolyte 3 is 1, for example, the thickness of yttria-stabilized silphea is 0.
．． The board is about 0.01 to 1 m long. The seal structure of the present invention can be applied to joints that require a sealing function, such as between the electrolyte 3 and the power generation part support structure 7. The lower layer of the sealing portion has a porous skeleton 16 manufactured by baking a filler such as a ceramic adhesive. The adhesive used to manufacture the skeleton should be as close to the electrolyte 3 and the power generation part support structure 7 as possible.
It is desirable that the coefficient of thermal expansion is close to that of A liquid sealant 17 such as a glass glaze is applied to the surface layer of the porous skeleton 16. This liquid sealant 17 melts during operation, penetrates into the surface layer and inside of the porous skeleton 160, and is supported.
本発明の第２実施例を第３図に示す。ｉｔ電解質は例え
ばイツトリア安定化ジルコニア（イツトリア比率７〜１
０ｍｏ１％程度のもの）の厚さ０．Ｏ１〜１＋＋ｌｌ＋
程度の板である。ｉ解質３と発電部支持構造体７との間
、インタコネクタ（ガス隔離部）１０とインタコネクタ
部支持構造体１２との間及び発電部支持構造体７とイン
タコネクタ部支持構造体１２との間のがスシールを必要
とする接合部には、本発明のシール方法が適用できる。A second embodiment of the invention is shown in FIG. The it electrolyte is, for example, an ittria stabilized zirconia (ittria ratio 7 to 1).
Thickness of about 0mo1%) is 0. O1~1++ll+
It is a board of about. i Between the solute 3 and the power generation part support structure 7, between the interconnector (gas isolation part) 10 and the interconnector part support structure 12, and between the power generation part support structure 7 and the interconnector part support structure 12. The sealing method of the present invention can be applied to joints that require a seal between the two.
シール部には各々液体溜め１６，１７．１８ｆ設ける。Liquid reservoirs 16, 17, and 18f are provided in the seal portions, respectively.
液体溜めの形状は浅く広いことが望筐しい。例えばシー
ル部の濡れ級長が２００鴎程度の場合は。It is desirable that the shape of the liquid reservoir be shallow and wide. For example, if the wettability length of the seal part is about 200 mm.
深さ１〜２ ｍ 、幅３〜１０ｍ８度の矩形溝形の液体
溜めを設けるとよい。また、第３園の例の発電部支持構
造体７とインタコネクタ支持構造体１２との間の接合部
のように印籠形のはめ合いと液体溜めとを兼ねる場合に
は、凹部と凸部とのすき筐を１〜２ｍとシ液体溜めとす
るとよい。液体シール剤の初期充填量は、溶融時に液体
溜めを満たし、ガスシールを必要とするすきまを埋める
のに十分な量とする。It is preferable to provide a rectangular groove-shaped liquid reservoir with a depth of 1 to 2 m and a width of 3 to 10 m and 8 degrees. In addition, when the joint between the power generation unit support structure 7 and the interconnector support structure 12 in the example of the third garden serves both as an inro-shaped fitting and a liquid reservoir, the concave portion and the convex portion It is best to make the space for the liquid reservoir 1 to 2 meters long. The initial filling amount of liquid sealant is sufficient to fill the liquid reservoir when melted and fill any gaps requiring gas sealing.
本発明は前述のように構成されているので、以下に記載
するような効果を奏する。Since the present invention is configured as described above, it produces the effects described below.
（１）固体電解質燃料電池のがスシールの機能を要する
接合部についてガスシールを確実に行うことができ接合
部での変位拘束が弱く発電部等の損＊を誘発するかそれ
が少なく、がスシールの機能が長時間にわたって持続で
きるような接合を実施することができる。(1) Solid electrolyte fuel cells can reliably perform gas sealing at joints that require a seal function, and the displacement restraint at the joints is weak, causing or minimizing damage to power generation parts, etc., and sealing is possible. It is possible to create a bond that allows the function of the device to continue for a long period of time.
（２）鉛直方向の接合線に対しても１本発明のシール方
法を適用することができるため、設計、部品製造過程で
の自由度が増す。例えば発電部支持構造体は、セラミッ
クスの複雑な成形品となるが、比較的単純な形状の部品
に分割して部品金製造し、その後本発明のシール方法を
適用して組立てるというような製造過８を採用すること
ができるようになる。(2) Since the sealing method of the present invention can also be applied to vertical joining lines, the degree of freedom in the design and parts manufacturing process is increased. For example, the power generation part support structure is a complex ceramic molded product, but it can be manufactured by dividing it into parts with relatively simple shapes, manufacturing the parts, and then assembling them by applying the sealing method of the present invention. 8 can be adopted.
（３） ｖｔＬ解質の板の製造時のうねり波うちによ
るすきまは数ｔｌＩＩＩｉで許容できるようになシミ解
質の板の生産工程の簡略化と歩留まｂの向上をはかるこ
とができる。(3) The gap due to undulating waves during the manufacture of vtL solute plates can be tolerated at several tlIIIi, thereby simplifying the production process of stain solute plates and improving the yield b.
（４）接合される部品相互間は液体シール剤を介して接
触するだけであるので、変位拘束がほとんどなく熱膨張
率の異なる材料をそれぞれに使用することができるよう
になる。例えば、電解質には。(4) Since the parts to be joined come into contact only through the liquid sealant, there is almost no displacement restriction, and materials with different coefficients of thermal expansion can be used for each part. For example, electrolytes.
導電特性に優れるイツ） ＩＪア安定化ジルコニア（イ
ツトリア比率７〜１０ ｍｏ１％程度のもの、熱膨張率
約１０ Ｘ １０”” Ｖｍ℃）、インタコネクタ（ガ
ス＠離部）には耐酸化・還元雰囲気特性に優れるランタ
ンクロマイト（ＬａＣｒＯ３１熱膨張率約１０ Ｘ １
０−６ｍ／ｍ℃）、支持構造体には、強度・加工性によ
び原料粉の経済性に優れるアルミナ（熱膨張率約７ Ｘ
１０””ｍ／ｍ ℃） 、というような材料の組合せ
を選定することができるようになシ、全体として電気特
性経済性に優れる固体電解質燃料電池を構成できる。IJA-stabilized zirconia (with a ratio of about 7 to 10 mo1%, thermal expansion coefficient of about 10 x 10" Vm℃), oxidation-resistant and reduction-resistant for interconnectors (gas @ isolated parts) Lanthanum chromite (LaCrO31 thermal expansion coefficient of approximately 10 x 1
0-6m/m℃), and the support structure is made of alumina (coefficient of thermal expansion of approximately 7
By being able to select a combination of materials such as 10"" m/m (°C), it is possible to construct a solid electrolyte fuel cell that has excellent electrical properties and economy as a whole.
（５）接合部のすき筐の液体シール剤が破断しても、液
体溜めから液体シール剤が毛細管現象により自動的に補
給されるという自己修復機能があるために、長時間のシ
ール持続機能がありシールを要する縁の長尺化もできる
ようになシ、設計製作運転維持上の自由度を増すことが
できる。(5) Even if the liquid sealant in the joint gap casing breaks, it has a self-repairing function in which liquid sealant is automatically replenished from the liquid reservoir by capillary action, so the seal can be maintained for a long time. The edges that require dovetail sealing can be made longer, increasing the degree of freedom in design, manufacturing, operation and maintenance.
第１図は本発明の第１実施例を示す図、第２図は第１実
施例のシール部の断面模式図、第３図は本発明の第２実
施例金示す図、第４図は従来のシール方法を示す図であ
る。
１・・・発電部、２・・・燃料電極、３・・・電解質、
４・・・酸素電極、５・・・燃料流路、６・・・酸素流
路２７・・・発電部支持構造体、８・・・イ／タコネク
タ部、９・・・インタコネクタ（燃料流路渡υ部）、１
０・・・インタコネクタ（ガス隔離部）、１１・・・イ
ンタコネクタ（酸素流路渡り部）、１２・・・インタコ
ネクタ部支持構造体、１３・・・発電部数のシール邪、
１４・・・インタコネクタ部数のシール部、１５・・・
支持構造体相互間のシール部、１６・・・シール部の多
孔質骨格、１７・・・シール部の液体シール剤表層、１
１６・・・発電部数のシール部の液体溜め、１１７・・
・インタコネクタ部数のシール部の液体溜め、１１８・
・・支持°構造体相互間のシール部の液体溜め、１
９・・・液
体シール剤。Fig. 1 is a diagram showing the first embodiment of the present invention, Fig. 2 is a schematic cross-sectional view of the seal portion of the first embodiment, Fig. 3 is a diagram showing the second embodiment of the invention, and Fig. 4 is a diagram showing the seal portion of the first embodiment. FIG. 3 is a diagram showing a conventional sealing method. 1... Power generation section, 2... Fuel electrode, 3... Electrolyte,
4...Oxygen electrode, 5...Fuel flow path, 6...Oxygen flow path 27...Power generation part support structure, 8...I/interconnector part, 9...Interconnector (fuel flow Michiwata υbe), 1
0... Interconnector (gas isolation part), 11... Interconnector (oxygen flow path crossing part), 12... Interconnector part support structure, 13... Seal for the number of power generation parts,
14... Seal portion of the number of interconnectors, 15...
Sealing portion between supporting structures, 16... Porous skeleton of sealing portion, 17... Liquid sealant surface layer of sealing portion, 1
16...Liquid reservoir in the seal part of the power generation unit, 117...
・Liquid reservoir of seal part of interconnector part, 118・
...Liquid reservoir in the sealing part between supporting structures, 19...Liquid sealing agent.
Claims (4)
４）からなる発電部（１）とインタコネクタ部（８）を
具備する燃料電池において、 発電部（１）と発電部支持構造体（７）の接合部および
インタコネクタ部（８）とインタコネクタ部支持構造体
（１２）の接合部のいずれかのシール構造として、 シール部の下層には充填剤を塗布し、シール部の表面に
は液体シール剤を塗布することによりシールすることを
特徴とする固体電解質燃料電池のシール構造。(1) Fuel electrode (2), solid electrolyte (3) and oxygen electrode (
4) In a fuel cell comprising a power generation section (1) and an interconnector section (8), the joint section between the power generation section (1) and the power generation section support structure (7) and the interconnector section (8) and the interconnector section. The sealing structure for any of the joints of the support structure (12) is characterized in that a filler is applied to the lower layer of the sealing part, and a liquid sealing agent is applied to the surface of the sealing part to achieve sealing. Seal structure for solid electrolyte fuel cells.
塗布することによりシールすることを特徴とする請求項
（１）記載の固体電解質燃料電池のシール構造。(2) The sealing structure for a solid electrolyte fuel cell according to claim (1), wherein the sealing is performed by mixing a filler and a liquid sealant in advance and applying the mixture to the sealing portion.
剤には釉薬および高温運転時に液体状になる金属のいず
れかを使用することを特徴とする請求項（１）又は（２
）記載の固体電解質燃料電池のシール構造。(3) A porous adhesive is used as the filler, and either a glaze or a metal that becomes liquid during high-temperature operation is used as the liquid sealant.
) Seal structure of the solid electrolyte fuel cell described.
するための液体溜めを設けることを特徴とする請求項（
３）記載の固体電解質燃料電池のシール構造。(4) Claim (4) characterized in that a liquid reservoir for holding a liquid sealant is provided as the seal structure of the joint part (
3) Seal structure of the solid electrolyte fuel cell described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202646A JPH0367466A (en) | 1989-08-04 | 1989-08-04 | Seal structure for solid electrolyte fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202646A JPH0367466A (en) | 1989-08-04 | 1989-08-04 | Seal structure for solid electrolyte fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0367466A true JPH0367466A (en) | 1991-03-22 |
Family
ID=16460794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1202646A Pending JPH0367466A (en) | 1989-08-04 | 1989-08-04 | Seal structure for solid electrolyte fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0367466A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005174658A (en) * | 2003-12-09 | 2005-06-30 | Ngk Spark Plug Co Ltd | Solid electrolyte fuel cell |
| JP2007323957A (en) * | 2006-05-31 | 2007-12-13 | Dainippon Printing Co Ltd | Solid oxide fuel cell, and its manufacturing method |
| US7569298B2 (en) | 2001-06-08 | 2009-08-04 | Toyota Jidosha Kabushiki Kaisha | Separator seal structure for a fuel cell |
| JP2012182069A (en) * | 2011-03-02 | 2012-09-20 | Ngk Spark Plug Co Ltd | Solid oxide fuel cell |
| JP2018032514A (en) * | 2016-08-24 | 2018-03-01 | 本田技研工業株式会社 | Fuel cell stack |
-
1989
- 1989-08-04 JP JP1202646A patent/JPH0367466A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7569298B2 (en) | 2001-06-08 | 2009-08-04 | Toyota Jidosha Kabushiki Kaisha | Separator seal structure for a fuel cell |
| JP2005174658A (en) * | 2003-12-09 | 2005-06-30 | Ngk Spark Plug Co Ltd | Solid electrolyte fuel cell |
| JP2007323957A (en) * | 2006-05-31 | 2007-12-13 | Dainippon Printing Co Ltd | Solid oxide fuel cell, and its manufacturing method |
| JP2012182069A (en) * | 2011-03-02 | 2012-09-20 | Ngk Spark Plug Co Ltd | Solid oxide fuel cell |
| JP2018032514A (en) * | 2016-08-24 | 2018-03-01 | 本田技研工業株式会社 | Fuel cell stack |
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