JP4258998B2 - Case for fuel cell - Google Patents

Case for fuel cell Download PDF

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Publication number
JP4258998B2
JP4258998B2 JP2001171442A JP2001171442A JP4258998B2 JP 4258998 B2 JP4258998 B2 JP 4258998B2 JP 2001171442 A JP2001171442 A JP 2001171442A JP 2001171442 A JP2001171442 A JP 2001171442A JP 4258998 B2 JP4258998 B2 JP 4258998B2
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JP
Japan
Prior art keywords
fuel cell
case
hydrogen
cell case
ventilation
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.)
Expired - Lifetime
Application number
JP2001171442A
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Japanese (ja)
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JP2002367647A (en
Inventor
秀幸 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2001171442A priority Critical patent/JP4258998B2/en
Priority to US10/158,906 priority patent/US6803142B2/en
Priority to DE10224962A priority patent/DE10224962B4/en
Publication of JP2002367647A publication Critical patent/JP2002367647A/en
Priority to US11/545,821 priority patent/USRE42720E1/en
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Publication of JP4258998B2 publication Critical patent/JP4258998B2/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

Description

【０００１】
【発明の属する技術分野】
本発明は、燃料電池用ケースに関し、詳しくは、燃料電池スタックを収納する燃料電池用ケースに関する。
【０００２】
【従来の技術】
車載用の燃料電池は、通常、燃料としての水素や酸化剤としての空気，冷却水のシール部材からのわずかな透過を除いて燃料電池スタックからリークしないようシール部材によりシールされており、外部からの雨水の浸入などを防止すると共に感電などの防止を図るために密閉性の高いケースに収納されている。
【０００３】
【発明が解決しようとする課題】
シール部材からわずかに透過した空気や冷却水については何ら問題は生じないが、シール部材からわずかに透過した水素については、その着火性を考慮すれば、水素をケースから外気に解放する必要が生じる。また、水素や空気のリークを防止するシール部材は、経年使用による老化を生じるのが一般的であり、燃料電池スタックから水素や空気などがリークする場合もある。この場合も同様に水素をケースから外気に解放する必要が生じる。
【０００４】
本発明の燃料電池用ケースは、燃料電池スタックのシール部材を透過するわずかな水素や燃料電池スタックからリークした水素をケースから外気に解放してケース内の水素濃度を低くすることを目的の一つとする。
【０００５】
【課題を解決するための手段およびその作用・効果】
本発明の燃料電池用ケースは、上述の目的の少なくとも一部を達成するために以下の手段を採った。
【０００６】
本発明の燃料電池用ケースは、
気体燃料を用いて燃料電池スタックを収納する燃料電池用ケースであって、
液体は透過しないが気体は透過する気体透過部
を備えることを要旨とする。
【０００７】
この本発明の燃料電池用ケースでは、気体透過部で液体は透過させずに気体を透過するから、即ち雨水などの液体の侵入を防止するが水素や空気などの気体を透過するから、ケース内の換気を行なうことができる。
【０００８】
こうした本発明の燃料電池用ケースにおいて、前記気体透過部は、水は透過しないが少なくとも水素を透過する水素透過部であるものとすることもできる。この態様の本発明の燃料電池用ケースにおいて、前記水素透過部は、ケースに形成された貫通孔と、該貫通孔を密封する水素透過膜とにより構成されてなるものとすることもできる。
【０００９】
また、本発明の燃料電池用ケースにおいて、前記気体透過部はケースの上部に形成されてなるものとすることもできる。こうすれば、空気より軽い水素をより多く外部に透過することができ、換気の効率を高くすることができる。
【００１０】
【００１１】
【００１２】
【００１３】
【発明の実施の形態】
次に、本発明の実施の形態を実施例を用いて説明する。図１は、本発明の実施例である燃料電池用ケース２０の構成の概略を示す構成図である。実施例の燃料電池用ケース２０には、図示するように、換気用の換気口２４と換気口２４を密封する水素透過膜２６とにより構成された換気部２２がケース最上部に設けられており、換気部２２以外の部位は収納されている燃料電池スタック１０が外部から完全に密封されるようシールされている。
【００１４】
水素透過膜２２は、水は透過しないが水素や空気などの気体は透過する材料、例えば多孔質材料により形成されており、例えば、住友電工社製の商品名「ポアフロン」を用いることができる。
【００１５】
いま、こうして構成された実施例の燃料電池用ケース２０が収納している燃料電池スタック１０から燃料としての水素がわずかではあるがシール部材を透過した場合やシール部材の劣化により水素がリークした場合を考える。燃料電池スタック１０からの水素は、ケース内に拡散するが、空気より軽いためケース最上部に設けられた換気部２２に集まる。この換気部２２に集まった水素は、水素透過膜２６を透過してケースから排出される。
【００１６】
以上説明した実施例の燃料電池用ケース２０によれば、燃料電池スタック１０のシール部材をわずかではあるが透過した水素や燃料電池スタック１０からリークした水素を換気部２２により換気するから、ケース内の水素濃度の上昇を抑制することができる。しかも、換気部２２をケース最上部に設けたから、水素の換気効率を高くすることができる。
【００１７】
実施例の燃料電池用ケース２０では、ケース最上部に換気部２２を設けたが、換気ができればよいから、ケース上部であれば最上部でなくても構わない。実施例の燃料電池用ケース２０では、ケース最上部に一つだけ換気部２２を設けるものとしたが、複数の換気部を設けるものとしてもよい。
【００１８】
【００１９】
【００２０】
【００２１】
【００２２】
【００２３】
【００２４】
【００２５】
以上、本発明の実施の形態について実施例を用いて説明したが、本発明はこうした実施例に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。
【図面の簡単な説明】
【図１】 本発明の実施例である燃料電池用ケース２０の構成の概略を示す構成図である。
【符号の説明】
２０ 燃料電池用ケース、２２ 換気部、２４ 換気口、２６ 水素透過膜。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel cell case, and more particularly to a fuel cell case that houses a fuel cell stack.
[0002]
[Prior art]
In-vehicle fuel cells are usually sealed by a sealing member so as not to leak from the fuel cell stack except for slight permeation from the sealing member of hydrogen as fuel, air as oxidant, and cooling water. In order to prevent the intrusion of rainwater and prevent electric shock, it is housed in a highly airtight case.
[0003]
[Problems to be solved by the invention]
There is no problem with air or cooling water that has permeated slightly from the sealing member, but hydrogen that has permeated slightly from the sealing member needs to be released from the case to the outside air, considering its ignitability. . Further, a seal member for preventing leakage of hydrogen or air generally causes aging due to aging, and hydrogen or air may leak from the fuel cell stack. In this case as well, it is necessary to release hydrogen from the case to the outside air.
[0004]
The fuel cell case of the present invention is intended to reduce the hydrogen concentration in the case by releasing a slight amount of hydrogen permeating through the seal member of the fuel cell stack or hydrogen leaking from the fuel cell stack to the outside air from the case. I will.
[0005]
[Means for solving the problems and their functions and effects]
The fuel cell case of the present invention employs the following means in order to achieve at least a part of the above object.
[0006]
The fuel cell case of the present invention comprises:
A fuel cell case for storing a fuel cell stack using gaseous fuel ,
The gist is to provide a gas permeable portion that does not allow liquid to pass through but allows gas to pass therethrough.
[0007]
In the fuel cell case according to the present invention , the gas does not permeate through the gas permeation section, that is, the liquid such as rainwater is prevented from entering, but the gas such as hydrogen or air is permeated. Ventilation can be performed.
[0008]
In the fuel cell case of the present invention , the gas permeable portion may be a hydrogen permeable portion that does not transmit water but transmits at least hydrogen. In the fuel cell case of the present invention according to this aspect, the hydrogen permeable portion may be constituted by a through hole formed in the case and a hydrogen permeable membrane that seals the through hole.
[0009]
In the fuel cell case of the present invention , the gas permeable part may be formed on an upper part of the case. If it carries out like this, hydrogen lighter than air can permeate | transmit to the exterior more, and the efficiency of ventilation can be made high.
[0010]
[0011]
[0012]
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram showing an outline of the configuration of a fuel cell case 20 according to an embodiment of the present invention. As shown in the figure, the fuel cell case 20 of the embodiment is provided with a ventilation part 22 composed of a ventilation opening 24 for ventilation and a hydrogen permeable membrane 26 for sealing the ventilation opening 24 at the top of the case. The parts other than the ventilation part 22 are sealed so that the stored fuel cell stack 10 is completely sealed from the outside.
[0014]
The hydrogen permeable membrane 22 is made of a material that does not transmit water but allows gas such as hydrogen and air to pass therethrough, for example, a porous material.
[0015]
The fuel cell stack 10 of the embodiment configured in this way now has a small amount of hydrogen as fuel passing through the seal member or when hydrogen leaks due to deterioration of the seal member. think of. Hydrogen from the fuel cell stack 10 diffuses into the case, but collects in the ventilation part 22 provided at the top of the case because it is lighter than air. The hydrogen collected in the ventilation unit 22 passes through the hydrogen permeable membrane 26 and is discharged from the case.
[0016]
According to the fuel cell case 20 of the embodiment described above, since the hydrogen permeated through the seal member of the fuel cell stack 10 and the hydrogen leaked from the fuel cell stack 10 are ventilated by the ventilation unit 22, The increase in the hydrogen concentration can be suppressed. Moreover, since the ventilation part 22 is provided at the uppermost part of the case, the ventilation efficiency of hydrogen can be increased.
[0017]
In the fuel cell case 20 of the embodiment , the ventilation part 22 is provided at the uppermost part of the case. However, the ventilation part 22 only needs to be ventilated. In the fuel cell case 20 of the embodiment, only one ventilation part 22 is provided at the uppermost part of the case, but a plurality of ventilation parts may be provided.
[0018]
[0019]
[0020]
[0021]
[0022]
[0023]
[0024]
[0025]
The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course you get.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of a configuration of a fuel cell case 20 according to an embodiment of the present invention.
[Explanation of symbols]
20 Fuel cell case, 22 Ventilation part, 24 Ventilation port, 26 Hydrogen permeable membrane.

Claims (4)

気体燃料を用いて燃料電池スタックを収納する燃料電池用ケースであって、
液体は透過しないが気体は透過する気体透過部
を備える燃料電池用ケース。A fuel cell case for storing a fuel cell stack using gaseous fuel,
A fuel cell case comprising a gas permeable portion that does not allow liquid to pass through but allows gas to pass through. 前記気体透過部は、水は透過しないが少なくとも水素を透過する水素透過部である請求項１記載の燃料電池用ケース。  The fuel cell case according to claim 1, wherein the gas permeable portion is a hydrogen permeable portion that does not transmit water but transmits at least hydrogen. 前記水素透過部は、ケースに形成された貫通孔と、該貫通孔を密封する水素透過膜とにより構成されてなる請求項２記載の燃料電池用ケース。  3. The fuel cell case according to claim 2, wherein the hydrogen permeable portion is constituted by a through hole formed in the case and a hydrogen permeable membrane that seals the through hole. 前記気体透過部はケースの上部に形成されてなる請求項１ないし３いずれか記載の燃料電池用ケース。  The fuel cell case according to claim 1, wherein the gas permeable portion is formed in an upper portion of the case.
JP2001171442A 2001-06-06 2001-06-06 Case for fuel cell Expired - Lifetime JP4258998B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2001171442A JP4258998B2 (en) 2001-06-06 2001-06-06 Case for fuel cell
US10/158,906 US6803142B2 (en) 2001-06-06 2002-06-03 Fuel cell
DE10224962A DE10224962B4 (en) 2001-06-06 2002-06-05 A fuel cell assembly
US11/545,821 USRE42720E1 (en) 2001-06-06 2006-10-11 Fuel cell mounting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001171442A JP4258998B2 (en) 2001-06-06 2001-06-06 Case for fuel cell

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2005364052A Division JP4715498B2 (en) 2005-12-16 2005-12-16 Case for fuel cell

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Publication Number Publication Date
JP2002367647A JP2002367647A (en) 2002-12-20
JP4258998B2 true JP4258998B2 (en) 2009-04-30

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Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002367648A (en) * 2001-06-06 2002-12-20 Toyota Motor Corp Case for fuel cell
JP4839581B2 (en) * 2004-06-18 2011-12-21 日産自動車株式会社 Fuel cell case structure
JP4876405B2 (en) * 2005-02-25 2012-02-15 トヨタ自動車株式会社 Case for fuel cell
JP5151715B2 (en) * 2008-06-16 2013-02-27 トヨタ自動車株式会社 Fuel cell
JP5315886B2 (en) * 2008-09-19 2013-10-16 日産自動車株式会社 Fuel cell cooling system
JP5251459B2 (en) * 2008-11-28 2013-07-31 トヨタ自動車株式会社 Fuel cell vehicle
JP5407366B2 (en) * 2009-01-27 2014-02-05 トヨタ自動車株式会社 FUEL CELL CASE AND VEHICLE HAVING FUEL CELL CASE
JP5708784B2 (en) 2013-07-04 2015-04-30 株式会社豊田自動織機 Battery pack
CN103633345A (en) * 2013-12-05 2014-03-12 新源动力股份有限公司 Fuel cell galvanic pile suitable for automobiles
EP3859873A1 (en) 2016-10-04 2021-08-04 Kabushiki Kaisha Toshiba Pressure relief case
JP6702554B2 (en) * 2016-10-04 2020-06-03 株式会社東芝 Explosion-proof waterproof case
JP6508170B2 (en) * 2016-11-16 2019-05-08 トヨタ自動車株式会社 Fuel cell system
JP6828636B2 (en) * 2017-08-09 2021-02-10 トヨタ自動車株式会社 High-pressure tank mounting structure
GB2566334B (en) * 2017-09-12 2022-11-23 Ceres Ip Co Ltd A stack of intermediate temperature, metal-supported, solid oxide fuel cell units
JP6907913B2 (en) 2017-12-08 2021-07-21 トヨタ自動車株式会社 Fuel cell vehicle
JP6897533B2 (en) 2017-12-08 2021-06-30 トヨタ自動車株式会社 Fuel cell system
JP7003721B2 (en) * 2018-02-20 2022-01-21 トヨタ自動車株式会社 Fuel cell vehicle
CN111998032A (en) * 2020-08-11 2020-11-27 新源动力股份有限公司 Device for improving vibration resistance of fuel cell

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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JPS6062064A (en) * 1983-09-14 1985-04-10 Hitachi Ltd Liquid fuel cell
JPH0475263A (en) * 1990-07-18 1992-03-10 Fuji Electric Co Ltd Package type fuel cell power generating unit
JP3576283B2 (en) * 1995-08-18 2004-10-13 東京瓦斯株式会社 Package type fuel cell power generator

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