JP2007115503A - Sealing structure of fuel cell - Google Patents

Sealing structure of fuel cell Download PDF

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Publication number
JP2007115503A
JP2007115503A JP2005305233A JP2005305233A JP2007115503A JP 2007115503 A JP2007115503 A JP 2007115503A JP 2005305233 A JP2005305233 A JP 2005305233A JP 2005305233 A JP2005305233 A JP 2005305233A JP 2007115503 A JP2007115503 A JP 2007115503A
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Japan
Prior art keywords
seal
separator
rib
amount adjusting
fuel cell
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JP2005305233A
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Japanese (ja)
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Haruto Takao
治人 高尾
Yoshikatsu Kakedai
吉活 掛鯛
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Tigers Polymer Corp
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Tigers Polymer Corp
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Priority to JP2005305233A priority Critical patent/JP2007115503A/en
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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 sealing structure of a fuel cell in which a rib sealing can be easily provided without creating a concave groove on a separator into which a sealing material is to be filled up as a rib seal and a tightening extent and strength of the separator can be adjusted, and a gas leaking can be prevented without fail. <P>SOLUTION: On a surface of the separator 1 are formed tightening extent adjusting seals 21, 22 of a plate shape and a convex rib seal 23 thicker than the tightening extent adjusting seals 21, 22. On both sides of the rib seal 23 are provided the tightening extent adjusting seal 21, 22 with gaps 31, 31 in between. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、燃料電池を構成するセパレータの表面に形成されるガス漏れ防止用のシール構造に関する。   The present invention relates to a gas leak prevention seal structure formed on the surface of a separator constituting a fuel cell.

従来、燃料電池を構成するセパレータに形成されるガス漏れ防止用の燃料電池のシール構造は、セパレータに凹溝を設け、その凹溝にシール材を充填している。また、特許文献１には予め別体で成形したシールゴムをセパレータのシール必要箇所に設けた凹溝に後付けで接着する構造が記載されている。
特開２００２−３３１０９号公報 2. Description of the Related Art Conventionally, in a fuel cell seal structure for preventing gas leakage formed in a separator constituting a fuel cell, a concave groove is provided in the separator, and the concave groove is filled with a sealing material. Further, Patent Document 1 describes a structure in which a seal rubber molded in advance as a separate body is attached to a concave groove provided in a required portion of a separator by retrofitting.
JP 2002-33109 A

しかしながら、凹溝へのシール材の充填作業は煩わしく、特に、緻密な構造では作業に多大な費用と時間が費やされる。また、セルを組立する際、セパレータ間に絶縁が必要な場合、その間に別途絶縁層を形成する必要があるなど種々の問題があった。本発明は、上記問題に鑑み、セパレータ表面に厚みの異なるシールを設けることで、セパレータに凹溝を設けることなく、また、容易にシールを設置できるなどの効果を知見し、本発明を完成するに至ったものである。   However, the filling operation of the sealing material into the concave groove is troublesome. In particular, in a dense structure, a great deal of cost and time are spent on the work. In addition, when assembling the cells, if insulation is required between the separators, there are various problems such as the need to separately form an insulating layer therebetween. In view of the above-mentioned problems, the present invention provides an effect that a seal having a different thickness is provided on the separator surface, so that a seal can be easily installed without providing a groove in the separator, and the present invention is completed. Has been reached.

本発明は燃料電池を構成するセパレータの周縁部表面に形成されるガス漏れ防止用のシール構造であって、締付量調整用シールと前記締付量調整用シールより厚肉のリブシールからなり、前記締付量調整用シールと前記リブシールの間に空間が形成されている。また、セパレータの表面にゴム溶液をスクリーン印刷によりコーティングした後、加硫硬化させて締付量調整用シールおよびリブシールが成形一体化されている。   The present invention is a gas leakage prevention seal structure formed on the peripheral surface of the separator constituting the fuel cell, comprising a tightening amount adjusting seal and a rib seal that is thicker than the tightening amount adjusting seal, A space is formed between the tightening amount adjusting seal and the rib seal. Further, a rubber solution is coated on the surface of the separator by screen printing, and then vulcanized and cured, and a tightening amount adjusting seal and a rib seal are formed and integrated.

本発明の燃料電池のシール構造は、セパレータ表面に形成された締付量調整用シールとリブシールとの間に空間を設けることにより、セルを組立する際、セパレータを締付することで、リブシールが容易に変形される。また、従来、セパレータ表面に形成されていたシール材を充填する凹溝が不要になり、煩わしい充填作業も不要になる。   According to the fuel cell seal structure of the present invention, by providing a space between the tightening amount adjusting seal formed on the separator surface and the rib seal, when assembling the cells, the rib seal is secured by tightening the separator. It is easily deformed. Further, the groove for filling the sealing material that has been conventionally formed on the separator surface becomes unnecessary, and the troublesome filling work becomes unnecessary.

リブシールの厚みを締付量調整用シールより厚肉にすることで、セルを組立する際、セパレータに形成されたリブシールが最初、低い締付力で変形される。その後、受圧面積の大きい締付量調整用シールが変形される。この時、セパレータを締付する力が急激に高まることにより、締付量の調整を容易に行うことができ、一定の力で確実に締付することができる。   By making the rib seal thicker than the tightening amount adjusting seal, the rib seal formed on the separator is first deformed with a low tightening force when the cell is assembled. Thereafter, the tightening amount adjusting seal having a large pressure receiving area is deformed. At this time, the tightening force of the separator is rapidly increased, so that the tightening amount can be easily adjusted, and the tightening can be surely performed with a certain force.

本発明によれば、セパレータにリブシールとなるシール材を充填する凹溝を設けることなく、リブシールの設置が容易にできる。また、セパレータの締付量および締付力を調整でき、確実にガス漏れを防止することができる。   According to the present invention, it is possible to easily install a rib seal without providing a concave groove for filling a separator with a sealing material to be a rib seal. Further, the tightening amount and tightening force of the separator can be adjusted, and gas leakage can be reliably prevented.

以下、本発明の燃料電池のシール構造について実施例を参照して説明する。   Hereinafter, the seal structure of the fuel cell of the present invention will be described with reference to examples.

図１はセパレータ全体平面図であり、図２は図１のＡ―Ａ矢視拡大断面図である。セパレータ１の表面には厚みｔの板状の締付量調整用シール２１,２２、厚みｔより厚肉の凸状のリブシール２３が形成されている。なお、締付量調整用シール２１の形状は、実施例に限定されず、例えば、図３に示すようなスリット状（ａ）、波状（ｂ）、格子状（ｃ）であってもよい。また、締付量調整用シール２２も締付量調整用シール２１と同様の形状に形成することができる。締付量調整用シール２１,２２の表面は安定した締付力を得るため、平滑なものが望ましい。リブシール２３は締付量調整用シール２１,２２の厚みｔより厚肉であればよく、その形状は実施例に限らず、例えば、図４に示すような三角状（ａ）、半楕円状（ｂ）であってもよい。   1 is an overall plan view of the separator, and FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. On the surface of the separator 1, plate-like tightening amount adjusting seals 21 and 22 having a thickness t and convex rib seals 23 having a thickness thicker than the thickness t are formed. The shape of the tightening amount adjusting seal 21 is not limited to the embodiment, and may be, for example, a slit shape (a), a wave shape (b), or a lattice shape (c) as shown in FIG. The tightening amount adjusting seal 22 can also be formed in the same shape as the tightening amount adjusting seal 21. The surfaces of the tightening amount adjusting seals 21 and 22 are preferably smooth in order to obtain a stable tightening force. The rib seal 23 only needs to be thicker than the thickness t of the tightening amount adjusting seals 21, 22, and the shape is not limited to the embodiment. For example, the rib seal 23 is triangular (a), semi-elliptical ( b).

締付量調整用シール２１,２２に挟まれたリブシール２３の両側には空間３１,３１が形成されている。本実施例では締付量調整用シール２１,２２はリブシール２３の両側に形成されているが、リブシール２３の外側４、もしくは内側５の片側のみに設置してもよい。   Spaces 31, 31 are formed on both sides of the rib seal 23 sandwiched between the tightening amount adjusting seals 21, 22. In this embodiment, the tightening amount adjusting seals 21 and 22 are formed on both sides of the rib seal 23, but may be installed only on one side of the outer side 4 or the inner side 5 of the rib seal 23.

空間３１,３１には締付量調整用シール２１,２２の厚みｔより小さい絶縁層３２,３３が形成されている。絶縁層３２,３３は必要であれば設置すればよく、任意に設置することができる。   Insulation layers 32 and 33 smaller than the thickness t of the tightening amount adjusting seals 21 and 22 are formed in the spaces 31 and 31, respectively. The insulating layers 32 and 33 may be installed if necessary, and can be arbitrarily installed.

セパレータ１はカーボン樹脂で形成されている。締付量調整用シール２１,２２、リブシール２３、絶縁層３２,３３はエチレン―プロピレン―ジエンゴム（ＥＰＤＭ）で形成されている。なお、締付量調整用シール２１,２２、リブシール２３、絶縁層３２,３３を形成する材料は実施例に限らず、例えば、フッ素ゴム、シリコーンゴムを用いることもできる。   The separator 1 is made of a carbon resin. The tightening amount adjusting seals 21 and 22, the rib seal 23, and the insulating layers 32 and 33 are made of ethylene-propylene-diene rubber (EPDM). The materials for forming the tightening amount adjusting seals 21 and 22, the rib seal 23, and the insulating layers 32 and 33 are not limited to the embodiment, and, for example, fluorine rubber or silicone rubber can be used.

締付量調整用シール２１,２２、リブシール２３はセパレータ１の表面にゴム溶液をスクリーン印刷によりコーティングした後、加硫硬化させて成形一体化している。   The tightening amount adjusting seals 21 and 22 and the rib seal 23 are molded and integrated by coating the surface of the separator 1 with a rubber solution by screen printing and then curing and curing.

図示しないセルを組立する際、セパレータ１に形成されたリブシール２３が最初に低い締付力で変形される。その後、受圧面積の大きい、厚みｔの締付量調整用シール２１,２２が変形される。厚みｔはリブシール２３の厚みを超えない範囲で調整でき、厚みｔにより、締付量、締付力を調整することができる。   When assembling a cell (not shown), the rib seal 23 formed on the separator 1 is first deformed with a low tightening force. Thereafter, the tightening amount adjusting seals 21, 22 having a large pressure receiving area and having a thickness t are deformed. The thickness t can be adjusted within a range not exceeding the thickness of the rib seal 23, and the tightening amount and the tightening force can be adjusted by the thickness t.

セパレータ全体平面図である。It is a separator whole top view. 図１のＡ―Ａ矢視拡大断面図である。It is an AA arrow expanded sectional view of FIG. 他の実施例の締付量調整用シールの形状を示す上面図である。It is a top view which shows the shape of the seal | sticker for tightening amount adjustment of another Example. 他の実施例のリブシールの形状を示す断面図である。It is sectional drawing which shows the shape of the rib seal of another Example.

符号の説明Explanation of symbols

１ セパレータ
２１,２２ 締付量調整用シール
２３ リブシール
３１ 空間
３２,３３ 絶縁層
４ 外側
５ 内側
ｔ 厚み 1 Separator 21, 22 Tightening amount adjusting seal 23 Rib seal 31 Space 32, 33 Insulating layer 4 Outside 5 Inside t Thickness

Claims (2)

燃料電池を構成するセパレータの周縁部表面に形成されるガス漏れ防止用のシール構造であって、締付量調整用シールと前記締付量調整用シールより厚肉のリブシールからなり、前記締付量調整用シールと前記リブシールの間に空間が形成されていることを特徴とする燃料電池のシール構造。   A seal structure for preventing gas leakage formed on a peripheral surface of a separator constituting a fuel cell, comprising a tightening amount adjusting seal and a rib seal that is thicker than the tightening amount adjusting seal, and A fuel cell seal structure, wherein a space is formed between a quantity adjusting seal and the rib seal. セパレータの表面にゴム溶液をスクリーン印刷によりコーティングした後、加硫硬化させて締付量調整用シールおよびリブシールを成形一体化してなる請求項１に記載の燃料電池のシール構造。   2. The fuel cell seal structure according to claim 1, wherein a rubber solution is coated on the surface of the separator by screen printing and then vulcanized and cured to form and integrate a tightening amount adjusting seal and a rib seal.
JP2005305233A 2005-10-20 2005-10-20 Sealing structure of fuel cell Pending JP2007115503A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011129267A (en) * 2009-12-15 2011-06-30 Nok Corp Short circuit prevention structure of fuel battery cell
JP2017532731A (en) * 2014-09-20 2017-11-02 ダイムラー・アクチェンゲゼルシャフトＤａｉｍｌｅｒ ＡＧ Bipolar plate assembly with integral seal for fuel cells
CN110729498A (en) * 2019-10-22 2020-01-24 中国矿业大学 Sealing structure of flat plate type solid oxide fuel cell

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000182639A (en) * 1998-12-16 2000-06-30 Toyota Motor Corp Sealing member and fuel cell using it
JP2002158018A (en) * 2000-11-16 2002-05-31 Sanyo Electric Co Ltd Fuel cell
JP2005209351A (en) * 2004-01-20 2005-08-04 Tigers Polymer Corp Forming method of rubber packing for fuel cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000182639A (en) * 1998-12-16 2000-06-30 Toyota Motor Corp Sealing member and fuel cell using it
JP2002158018A (en) * 2000-11-16 2002-05-31 Sanyo Electric Co Ltd Fuel cell
JP2005209351A (en) * 2004-01-20 2005-08-04 Tigers Polymer Corp Forming method of rubber packing for fuel cell

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011129267A (en) * 2009-12-15 2011-06-30 Nok Corp Short circuit prevention structure of fuel battery cell
JP2017532731A (en) * 2014-09-20 2017-11-02 ダイムラー・アクチェンゲゼルシャフトＤａｉｍｌｅｒ ＡＧ Bipolar plate assembly with integral seal for fuel cells
CN110729498A (en) * 2019-10-22 2020-01-24 中国矿业大学 Sealing structure of flat plate type solid oxide fuel cell

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