JP4715498B2 - Case for fuel cell - Google Patents

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JP4715498B2
JP4715498B2 JP2005364052A JP2005364052A JP4715498B2 JP 4715498 B2 JP4715498 B2 JP 4715498B2 JP 2005364052 A JP2005364052 A JP 2005364052A JP 2005364052 A JP2005364052 A JP 2005364052A JP 4715498 B2 JP4715498 B2 JP 4715498B2
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case
fuel cell
pressure
hydrogen
predetermined
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JP2006140163A (en
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秀幸 田中
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Toyota Motor Corp
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Description

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。   The present invention relates to a fuel cell case, and more particularly to a fuel cell case that houses a fuel cell stack.

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。   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. It is housed in a highly sealed case to prevent the intrusion of rainwater and prevent electric shock.

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。更に、燃料電池スタックから水素がリークした場合、リークした水素の着火によりケース内の圧力が急上昇したときの対応も必要となる。   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. Furthermore, when hydrogen leaks from the fuel cell stack, it is necessary to cope with the case where the pressure in the case suddenly increases due to ignition of the leaked hydrogen.

本発明の燃料電池用ケースは、ケース内の圧力の急上昇に対処することを目的とする。 An object of the fuel cell case of the present invention is to cope with a sudden rise in pressure in the case.

本発明の燃料電池用ケースは、上述の目的を達成するために以下の手段を採った。 The fuel cell case of the present invention employs the following means in order to achieve the above object .

本発明の燃料電池用ケースは、
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、
ケースに形成された所定面積の貫通孔と、該貫通孔を所定の密着強度をもって密封する密封部材と、により構成されてなり、ケース内が所定の圧力となったときに該圧力を解放する圧力解放部
を備え、
前記所定面積は、前記所定の圧力が作用したときに前記所定の密着強度に打ち勝つ力が作用する面積である
ことを備えることを要旨とする。 The fuel cell case of the present invention comprises:
A fuel cell case for storing a fuel cell stack,
A pressure formed by a through-hole having a predetermined area formed in the case and a sealing member for sealing the through-hole with a predetermined adhesion strength, and releasing the pressure when the inside of the case reaches a predetermined pressure A release part ,
The predetermined area is an area where a force that overcomes the predetermined adhesion strength acts when the predetermined pressure is applied.
The gist is to provide this.

この本発明の第２の燃料電池用ケースでは、圧力解放部がケース内が所定の圧力となったときに圧力を解放するから、ケース内が異常圧力になるのを防止することができる。   In the second fuel cell case of the present invention, since the pressure release portion releases the pressure when the inside of the case reaches a predetermined pressure, it is possible to prevent the inside of the case from becoming an abnormal pressure.

次に、本発明を実施するための最良の形態を実施例を用いて説明する。   Next, the best mode for carrying out the present invention will be described using examples.

図１は、本発明の参考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。参考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。 FIG. 1 is a configuration diagram showing an outline of a configuration of a fuel cell case 20 which is a reference example of the present invention. In the fuel cell case 20 of the reference example , as shown in the figure, a ventilation part 22 composed of a ventilation opening 24 for ventilation and a hydrogen permeable membrane 26 for sealing the ventilation opening 24 is provided 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.

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。   The hydrogen permeable membrane 22 is formed of a material that does not transmit water but allows gas such as hydrogen and air to pass therethrough, for example, a porous material. For example, a trade name “Poreflon” manufactured by Sumitomo Electric Co., Ltd. can be used.

いま、こうして構成された参考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。 The fuel cell stack 10 of the fuel cell case 20 of the reference example configured as described above has a small amount of hydrogen as fuel that has permeated through the seal member or has leaked 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.

以上説明した参考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。 According to the fuel cell case 20 of the reference example 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.

参考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。参考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。 In the fuel cell case 20 of the reference example , 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 reference example , only one ventilation part 22 is provided at the uppermost part of the case, but a plurality of ventilation parts may be provided.

次に、本発明の実施例の燃料電池用ケース１２０について説明する。図２は実施例の燃料電池用ケース１２０の構成の概略を示す構成図であり、図３は図２の燃料電池用ケース１２０のＡ−Ａ断面を示す拡大断面図である。実施例の燃料電池用ケース１２０は、図示するように、圧力解放孔１２４を所定の密着強度を有する両面接着テープ１
２８を用いて圧抜きフタ１２６で密封してなる圧力解放部１２２がケース側部に設けられており、圧力解放部１２２の部位でも内部に収納されている図示しない燃料電池スタックが外部から完全に密封されるようシールされている。 Next, the fuel cell case 120 of the embodiment of the present invention will be described. Figure 2 is a block diagram showing a schematic configuration of a fuel cell case 120 of the embodiment, FIG. 3 is an enlarged sectional view showing the A-A cross section of the fuel cell case 120 of FIG. In the fuel cell case 120 of the embodiment , as shown in the drawing, the pressure release hole 124 has a double-sided adhesive tape 1 having a predetermined adhesion strength.
28 is provided on the side of the case, and the fuel cell stack (not shown) accommodated inside the pressure release portion 122 is completely externally provided. Sealed to be sealed.

圧力解放孔１２４の開口面積は、ケースの破壊圧力以下の所定の圧力（例えば、６ｋＰａＧ）が作用したときに圧抜きフタ１２６に作用する力が両面接着テープ１２８の密着強度に打ち勝つよう計算されている。なお、この所定の圧力は、ケースを形成する材質などにより設定される。   The opening area of the pressure release hole 124 is calculated so that the force acting on the pressure release lid 126 overcomes the adhesion strength of the double-sided adhesive tape 128 when a predetermined pressure (for example, 6 kPaG) equal to or lower than the breaking pressure of the case is applied. Yes. The predetermined pressure is set by the material forming the case.

こうして構成された実施例の燃料電池用ケース１２０に収納された燃料電池スタックから水素がリークして何らかの原因によりリークした水素に着火した場合を考える。水素は、酸素の存在下で着火すると爆発的に燃焼する。この爆発的な燃焼時には、ケース内部の圧力は急上昇する。しかし、ケース内圧力が所定の圧力に達すると、ケース内圧力に基づいて圧抜きフタ１２６に作用する力が両面接着テープ１２８の密着強度に打ち勝つから、ケース内の圧力は所定の圧力未満に保持される。所定の圧力はケースの破壊圧力以下に設定されているから、こういた水素の爆発的な燃焼によっても異常な圧力上昇によるケースの破壊を防止することができる。なお、圧力解放部１２２における圧力解放の圧力値（所定の圧力）は、両面接着テープ１２８の密着強度と圧力解放孔１２４の開口面積によって定めることができる。 Consider a case in which hydrogen leaks from the fuel cell stack housed in the fuel cell case 120 of the embodiment configured in this way and the leaked hydrogen ignites for some reason. Hydrogen burns explosively when ignited in the presence of oxygen. During this explosive combustion, the pressure inside the case rises rapidly. However, when the pressure in the case reaches a predetermined pressure, the force acting on the pressure release lid 126 overcomes the adhesion strength of the double-sided adhesive tape 128 based on the pressure in the case, so that the pressure in the case is kept below the predetermined pressure. Is done. Since the predetermined pressure is set to be equal to or lower than the case breaking pressure, the case can be prevented from being destroyed due to an abnormal pressure rise even by such explosive combustion of hydrogen. The pressure release pressure value (predetermined pressure) in the pressure release portion 122 can be determined by the adhesion strength of the double-sided adhesive tape 128 and the opening area of the pressure release hole 124.

以上説明した実施例の燃料電池用ケース１２０によれば、圧力解放部１２２を設けることにより、ケース内圧力が異常な高圧になることを防止することができる。この結果、異常な圧力上昇によるケースの破損を防止することができる。 According to the fuel cell case 120 of the embodiment described above, it is possible to prevent the case internal pressure from becoming an abnormally high pressure by providing the pressure release portion 122. As a result, it is possible to prevent the case from being damaged due to an abnormal pressure increase.

実施例の燃料電池用ケース１２０では、圧抜きフタ１２６を両面接着テープ１２８により圧力解放孔１２４を密封するよう接着したが、両面接着テープ１２８に代えてシール部材を用い、ボルトにより圧抜きフタ１２６を圧力解放孔１２４に取り付けるものとしてもよい。この場合、所定の圧力に基づく力が圧抜きフタ１２６に作用したときにボルトの締結強度に打ち勝って内気が解放されるようにすればよい。 In the fuel cell case 120 of the embodiment , the pressure release lid 126 is bonded so as to seal the pressure release hole 124 with the double-sided adhesive tape 128, but a seal member is used instead of the double-sided adhesive tape 128 and May be attached to the pressure release hole 124. In this case, when a force based on a predetermined pressure acts on the pressure release lid 126, it is sufficient to overcome the fastening strength of the bolt and release the inside air.

実施例の燃料電池用ケース１２０では、圧力解放部１２２をケース側面に設けたが、ケース上面やケース下面に設けるものとしてもよい。また、実施例の燃料電池用ケース１２０では、圧力解放部１２２を一つ設けるものとしたが、複数の圧力解放部を設けるものとしてもよい。 In the fuel cell case 120 of the embodiment , the pressure release portion 122 is provided on the side surface of the case, but may be provided on the upper surface of the case or the lower surface of the case. In the fuel cell case 120 of the embodiment , one pressure release portion 122 is provided. However, a plurality of pressure release portions may be provided.

以上、参考例の燃料電池用ケース２０と実施例の燃料電池用ケース１２０とを区別して説明したが、参考例の燃料電池用ケース２０で説明した換気部２２と実施例の燃料電池用ケース１２０で説明した圧力解放部１２２の双方を備える燃料電池用ケースとしてもよいことは勿論である。 The fuel cell case 20 of the reference example and the fuel cell case 120 of the example have been described above separately. However, the ventilation unit 22 described in the fuel cell case 20 of the reference example and the fuel cell case 120 of the example are described. Of course, it is good also as a case for fuel cells provided with both the pressure release parts 122 demonstrated by (1).

以上、本発明を実施するための最良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。   The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

本発明は、燃料電池用ケースの製造産業に利用可能である。   The present invention is applicable to the manufacturing industry of fuel cell cases.

本発明の参考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。It is a block diagram which shows the outline of a structure of the case 20 for fuel cells which is a reference example of this invention. 実施例の燃料電池用ケース１２０の構成の概略を示す構成図である。It is a block diagram which shows the outline of a structure of the case 120 for fuel cells of an Example . 図２の燃料電池用ケース１２０のＡ−Ａ断面を示す拡大断面図である。It is an expanded sectional view which shows the AA cross section of case 120 for fuel cells of FIG.

２０，１２０ 燃料電池用ケース、２２ 換気部、２４ 換気口、２６ 水素透過膜、１２２ 圧力解放部、１２４ 圧力解放孔、１２６ 圧抜きフタ、１２８ 両面接着テープ。
20, 120 Fuel cell case, 22 Ventilation part, 24 Ventilation port, 26 Hydrogen permeable membrane, 122 Pressure release part, 124 Pressure release hole, 126 Pressure release lid, 128 Double-sided adhesive tape.

Claims (1)

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、
ケースに形成された所定面積の貫通孔と、該貫通孔を所定の密着強度をもって密封する密封部材と、により構成されてなり、ケース内が所定の圧力となったときに該圧力を解放する圧力解放部
を備え、
前記所定面積は、前記所定の圧力が作用したときに前記所定の密着強度に打ち勝つ力が作用する面積である
燃料電池用ケース。

A fuel cell case for storing a fuel cell stack,
A pressure formed by a through-hole having a predetermined area formed in the case and a sealing member for sealing the through-hole with a predetermined adhesion strength, and releasing the pressure when the inside of the case reaches a predetermined pressure A release part ,
The fuel cell case , wherein the predetermined area is an area where a force that overcomes the predetermined adhesion strength acts when the predetermined pressure is applied .

JP2005364052A 2005-12-16 2005-12-16 Case for fuel cell Expired - Lifetime JP4715498B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2866830B2 (en) 1996-06-13 1999-03-08 ジャン − クロード ドコー Trash can

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121170A1 (en) 2015-01-26 2016-08-04 ブラザー工業株式会社 Fuel battery cabinet
JP6417982B2 (en) * 2015-01-30 2018-11-07 株式会社豊田自動織機 Industrial vehicle
JP6508170B2 (en) * 2016-11-16 2019-05-08 トヨタ自動車株式会社 Fuel cell system
JP7092006B2 (en) 2018-11-28 2022-06-28 トヨタ自動車株式会社 Fuel cell case

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541228A (en) * 1991-02-05 1993-02-19 Ishikawajima Harima Heavy Ind Co Ltd Fuel cell equipment
JPH0714589A (en) * 1993-06-24 1995-01-17 Toshiba Corp Ventilating device for fuel cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541228A (en) * 1991-02-05 1993-02-19 Ishikawajima Harima Heavy Ind Co Ltd Fuel cell equipment
JPH0714589A (en) * 1993-06-24 1995-01-17 Toshiba Corp Ventilating device for fuel cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2866830B2 (en) 1996-06-13 1999-03-08 ジャン − クロード ドコー Trash can

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