JPS6273576A - Fuel cell - Google Patents
Fuel cellInfo
- Publication number
- JPS6273576A JPS6273576A JP60212464A JP21246485A JPS6273576A JP S6273576 A JPS6273576 A JP S6273576A JP 60212464 A JP60212464 A JP 60212464A JP 21246485 A JP21246485 A JP 21246485A JP S6273576 A JPS6273576 A JP S6273576A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- gas
- insulating layer
- flow path
- electrode end
- 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.)
- Granted
Links
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】 〔発明の利用分野〕 本発明は燃料電池に関するものである。[Detailed description of the invention] [Field of application of the invention] The present invention relates to fuel cells.
従来、燃料電池の電極端部におけるガス漏れによる燃料
ガスと酸化剤ガスとの混合すなわち異種ガスの混合を防
止するための電極端部シールの技術としては特開昭５８
−４４６７２号公報、特開昭５９−６８１７１号公報、
特開昭５９−４６７６７号公報、特開昭６０−１０５６
４号公報、特開昭６０−１０５６５号公報、特開昭５９
−２０５１６４号公報、特開昭５９−２０７５６３号公
報、特開昭６０−６６号公報などがある。Conventionally, a technique for sealing the electrode end to prevent the mixing of fuel gas and oxidizing gas due to gas leakage at the electrode end of a fuel cell, that is, the mixing of different gases, was disclosed in Japanese Patent Laid-Open No. 58.
-44672 publication, JP-A-59-68171 publication,
JP-A-59-46767, JP-A-60-1056
Publication No. 4, JP-A-60-10565, JP-A-59
JP-A-205164, JP-A-59-207-563, JP-A-60-66, etc.
このうち例えば特開昭５９ ２０７５６３−％公報では
電極端部を貫通するガス漏れに対しては有効であるが、
電極端部とセパレータとの界面を通るガス漏れに対して
は電極表面が十分に平滑でない場合は別途対策が必要で
ある。また、例えば特開昭６０−１０５６４号公報や特
開昭６０−１０５６５号公報では電極端部を貫通するガ
ス漏れと、電極端部とセパレータとの界面を通るガス漏
れとの両方に対して有効であるが、セパレータの形状が
複雑になる。Among these, for example, JP-A-59-207563-% is effective against gas leakage penetrating the electrode end, but
To prevent gas leakage through the interface between the electrode end and the separator, separate measures are required if the electrode surface is not sufficiently smooth. In addition, for example, Japanese Patent Application Laid-Open No. 60-10564 and No. 60-10565 are effective against both gas leakage penetrating through the electrode end and gas leakage through the interface between the electrode end and the separator. However, the shape of the separator becomes complicated.
本発明は以上の点に鑑みなされたものであり、電極端部
から異種ガスが漏れ込んできても電池性能、電池劣化に
悪影響を及ぼさないようにすることを可能とした燃料電
池を提供することを目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a fuel cell that can prevent cell performance and cell deterioration from being adversely affected even if a foreign gas leaks from the electrode end. The purpose is to
すなわち本発明は電解質マトリックスを間に挟んで対向
配置され、かつガス流路を有する一対のガス拡散電極と
、このガス拡散電極に積層されたセパレータとを備えて
いる燃料電池において、前記電極の少なくとも一方の電
極の端部に、前記ガス流路と平行な端部を覆い、かつ前
記電極端部に、前記ガス流路と平行な端部を覆う絶縁層
を設けたことを特徴とするものであり、これによって電
極端部から異種ガスが電極端部に、前記ガス流路に漏れ
込んできても絶縁層でその影響を遮断されるようになる
。That is, the present invention provides a fuel cell comprising a pair of gas diffusion electrodes that are arranged opposite to each other with an electrolyte matrix in between and have a gas flow path, and a separator laminated on the gas diffusion electrodes. An insulating layer is provided at an end of one electrode to cover an end parallel to the gas flow path, and an insulating layer is provided at the end of the electrode to cover an end parallel to the gas flow path. As a result, even if a foreign gas leaks from the electrode end to the electrode end and into the gas flow path, the insulating layer blocks the influence.
〔発明の実施例〕
以下、図示した実施例に基づいて本発明を説明する。第
１図には本発明の一実施例が示されている。同図に示さ
れているように燃料電池は電解質マトリックス１を間に
挟んで対向配置され、かつガス流路２．ａｏ を有する
一対のガス拡散電極（以下、電極と称する）２ａ、２ｂ
このガス拡散電極２ａ、２ｂに積層されたセパレータ３
＋ｉ、３ｂ等を備えている。このように構成された燃料
電池で本実施例では電極２ａ、２ｂの少なくとも−７一
方の電極２ａの端部（電ｔｉ端部）２ａ１に、ガス流路
２ａｏと平行な端部を覆い、かつ電極端部２．′ｌｌに
、前記ガス流路２ａｏと平行な端部を覆う絶縁層を設け
た。そしてこの絶縁層を樹脂膜４で形成した。[Embodiments of the Invention] The present invention will be described below based on illustrated embodiments. FIG. 1 shows an embodiment of the invention. As shown in the figure, the fuel cells are arranged facing each other with an electrolyte matrix 1 in between, and gas flow channels 2. A pair of gas diffusion electrodes (hereinafter referred to as electrodes) 2a, 2b having ao
Separator 3 laminated on these gas diffusion electrodes 2a, 2b
+i, 3b, etc. In the fuel cell configured as described above, in this embodiment, at least one of the electrodes 2a and 2b is covered with an end parallel to the gas flow path 2ao at the end 2a1 of one of the electrodes 2a, and Electrode end 2. 'll was provided with an insulating layer covering the end parallel to the gas flow path 2ao. This insulating layer was then formed of a resin film 4.
このようにすることにより電極２ａ、２ｂの少なくとも
一方の電極２ａの端部２ａｉに、ガス流路２ａｏと平行
な端部を覆い、かつ電極端部２ａｘに、前記ガス流路２
ａｏと平行な端部を覆う樹脂膜４が投けられるようにな
って、電極端部２ａｒから異種がスが電極端部２ａｘに
、前記ガス流路２ａｏに漏れ込んできても樹脂膜４でそ
の影響が遮断されるようになり、電極端部２８１から異
種ガスが漏れ込んできても電池性能、電池劣化に悪影響
を及ぼさないようにすることを可能とした燃料電池を得
ることができる。By doing this, the end 2ai of at least one of the electrodes 2a, 2b is covered with the end parallel to the gas flow path 2ao, and the gas flow path 2a is covered with the electrode end 2ax.
Since the resin film 4 covering the end parallel to the ao is thrown, even if foreign gas leaks from the electrode end 2ar to the electrode end 2ax and into the gas flow path 2ao, the resin film 4 will prevent it. This influence can be blocked, and a fuel cell can be obtained in which even if a foreign gas leaks from the electrode end 281, it will not have an adverse effect on battery performance and battery deterioration.
すなわち電極端部２ａｚに樹脂膜４を設けたが、この樹
脂膜４を電極端部２ａ１に、前記ガス流路２ａｏの幅だ
けセパレータ３ａ側よりも電解質マトリックス１側の電
極２８面での幅を大きくし、電極端部２ａｚに、前記ガ
ス流路２ａｏの下部にわたって被覆するようにした。こ
のようにすることにより、電極端部２ａｓから異種ガス
が漏れ込んできても電池性能、電池劣化に悪影響を及ぼ
さないようにすることができるようになる６すなわち電
極端部２ａｉ を樹脂膜などで被覆し端部シールを設け
ることによって、多孔質な電極端部２ｎｘを貫通しての
異種ガスの混入は防止できるが、セパレータ３ａと電極
端部２ａｘ との界面からの異種ガスの漏れ込みは、電
極端部２ａ１、セパレータ３ａおよび端部シールの厚み
の微小な凹凸により防止できない恐れがある。That is, the resin film 4 is provided on the electrode end 2az, and the resin film 4 is placed on the electrode end 2a1 so that the width on the electrode 28 surface on the electrolyte matrix 1 side is wider than the separator 3a side by the width of the gas flow path 2ao. It was made large enough to cover the electrode end 2az and the lower part of the gas flow path 2ao. By doing so, it is possible to prevent the battery performance and battery deterioration from being adversely affected even if a foreign gas leaks from the electrode end 2as.6 In other words, the electrode end 2ai is covered with a resin film or the like. By covering and providing an end seal, it is possible to prevent foreign gas from penetrating the porous electrode end 2nx, but leakage of foreign gas from the interface between the separator 3a and the electrode end 2ax is prevented. There is a possibility that the problem cannot be prevented due to minute irregularities in the thickness of the electrode end 2a1, the separator 3a, and the end seal.
ところでこのような異種ガスの漏れ込みは電極端部２ａ
Ｘから１本目のガス流路２ａｏで最大で、２木目以降は
指数関数的に急激に減少することが実験的に知られてい
る。従って本実施例のように樹脂膜４を電極端部２Ｆ１
１から電極端部２ａ＋側のガス流路２ａｏと平行な端部
を覆って配置すれば、セパレータ３ａと電極端部２ａｘ
との界面から漏れこんできた異種ガスに起因する正常
な発電部分の短絡が防止されるようになって、短絡電流
が流れないようになり、電極２ａ部の損傷を防ＩＦする
ことができ、漏れ込んできたガスの悪影響を防ｌヒでき
る。すなわち異種ガスが混入した電極部分では反応ガス
が不足することにより電気化学的な電極反応が起こり慢
ず、有効な発電面積が減少し電池電圧が低下すると共に
、反応ガスの不足によって生じる非発電部分が正常な発
電部分を短絡することになり、非発電部分に短絡電流が
流れ、この短絡電流が１！ ｔ４２ ａ部を損傷するこ
とになる。ところが上述のように異種ガスが五１も多く
漏れ込んでくる′ｅｒ！、極端部２ａｘに、前記ガス流
路２ａｏと平行な端部を覆った樹脂１１１ａ４によって
、正常な発電部分が短絡されず、従って短絡電流は流れ
ない。By the way, such leakage of different gases occurs at the electrode end 2a.
It is experimentally known that it is maximum at the first gas flow path 2ao from X, and rapidly decreases exponentially from the second line onward. Therefore, as in this embodiment, the resin film 4 is attached to the electrode end 2F1.
1 to the end parallel to the gas flow path 2ao on the electrode end 2a+ side, the separator 3a and the electrode end 2ax
This prevents short-circuiting of the normal power generation section due to foreign gas leaking from the interface with the electrode 2a, preventing short-circuit current from flowing, and preventing damage to the electrode 2a section. It can prevent the harmful effects of leaking gas. In other words, in the electrode part where different gases are mixed, due to the lack of reactive gas, the electrochemical electrode reaction does not occur slowly, the effective power generation area decreases, the battery voltage decreases, and the non-power generation part caused by the lack of reactive gas. will short-circuit the normal power generating part, and a short circuit current will flow to the non-generating part, and this short circuit current will be 1! This will damage the t42 a section. However, as mentioned above, a lot of foreign gas leaks in! Due to the resin 111a4 covering the end parallel to the gas flow path 2ao at the extreme portion 2ax, the normal power generation portion is not short-circuited, and therefore no short-circuit current flows.
第２図には本発明の他の実施例を示されている。FIG. 2 shows another embodiment of the invention.
本実施例では絶縁層を樹脂膜４ａと絶縁膜５とで形成し
た。そして樹脂膜４ａで電極端部２ａｉを覆い、絶縁層
５で電極端部２ａ１に、前記ガス流路２ａｏと平行な端
部を覆うようにした。このようにすることにより電極端
部２ａｉに、前記ガス流路２ａ。In this example, the insulating layer is formed of a resin film 4a and an insulating film 5. Then, the resin film 4a covered the electrode end 2ai, and the insulating layer 5 covered the electrode end 2a1 and the end parallel to the gas flow path 2ao. By doing so, the gas flow path 2a is formed at the electrode end 2ai.
の底部は絶縁膜５で覆われるようになって、前述の場合
と同様な作用効果を奏することができる。The bottom part is covered with the insulating film 5, and the same effect as in the above case can be achieved.
すなわち電極端部２ａｔから電極端部２ａｘに、前記ガ
ス流路２ａｏの内側まで及ぶ幅を有する絶ｍ層５を、一
対の電極２ａ、２ｂ間に挿入した。That is, an absolute layer 5 having a width extending from the electrode end 2at to the electrode end 2ax to the inside of the gas flow path 2ao was inserted between the pair of electrodes 2a and 2b.
この場合に樹脂１ｊＪ４ａの幅は図中表示のように、例
えばセパレータ３ａに面する側と同一幅にして形成する
ことができる。In this case, the width of the resin 1jJ4a can be formed to be the same width as the side facing the separator 3a, for example, as shown in the figure.
なお以上の各実施例で電解質マトリックス１側の絶縁層
をガス流ｗ４２ ａ ｏの加工範囲よりも内側まで拡げ
ることにより、有効な電極面積の減少が考えられるが、
電極端部２ａ１にガス流路２ａ。In addition, in each of the above embodiments, by expanding the insulating layer on the electrolyte matrix 1 side to the inside of the processing range of the gas flow w42ao, the effective electrode area may be reduced;
A gas flow path 2a is provided at the electrode end portion 2a1.
を追加加工することによって、有効電極面積を減小する
ことなく、各実施例の構成を実現することができる。By performing additional processing, the configuration of each embodiment can be realized without reducing the effective electrode area.
ト述のように本発明は電極端部から異種ガスが漏れ込ん
できでも電池性能、電池劣化に悪影響を及ぼさないよう
になって、電極端部から異種ガスが漏れ込んできても電
池性能、電池劣化に悪影響を及ぼさないようにすること
を可能とした燃料電池を得ることができる。As mentioned above, the present invention prevents the battery performance and battery deterioration from being adversely affected even if a foreign gas leaks from the electrode end. It is possible to obtain a fuel cell in which deterioration is not adversely affected.
第１図および第２図は本発明の燃料電池のに々異なる実
施例を示す一対のガス拡散電極の電極端部周りの縦断面
図である。
１・・・電解質マトリックス、２ａ、２ｂ・・・ガス拡
散電極、２ａｏ ・・ガス流路、２ａ１・・・電極端
部、３ａ、３ｂ−セパレータ、４．４ａ−樹脂膜、５・
・・絶縁膜。FIGS. 1 and 2 are longitudinal sectional views around the electrode ends of a pair of gas diffusion electrodes showing different embodiments of the fuel cell of the present invention. DESCRIPTION OF SYMBOLS 1... Electrolyte matrix, 2a, 2b... Gas diffusion electrode, 2ao... Gas flow path, 2a1... Electrode end, 3a, 3b-Separator, 4.4a-Resin membrane, 5.
...Insulating film.
Claims (1)
つガス流路を有する一対のガス拡散電極と、このガス拡
散電極に積層されたセパレータとを備えている燃料電池
において、前記電極の少なくとも一方の電極の端部に、
前記ガス流路と平行な端部を覆い、かつ前記電極端部近
傍のガス流路の底部側を覆う絶縁層を設けたことを特徴
とする燃料電池。 ２、前記絶縁層が、樹脂膜で形成されたものである特許
請求の範囲第１項記載の燃料電池。 ３、前記絶縁層が、樹脂膜と絶縁膜とで形成されたもの
である特許請求の範囲第１項記載の燃料電池。[Claims] 1. A fuel cell comprising a pair of gas diffusion electrodes that are arranged opposite to each other with an electrolyte matrix in between and have a gas flow path, and a separator laminated on the gas diffusion electrodes, At the end of at least one of the electrodes,
A fuel cell characterized in that an insulating layer is provided that covers an end parallel to the gas flow path and covers a bottom side of the gas flow path near the electrode end. 2. The fuel cell according to claim 1, wherein the insulating layer is formed of a resin film. 3. The fuel cell according to claim 1, wherein the insulating layer is formed of a resin film and an insulating film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60212464A JPS6273576A (en) | 1985-09-27 | 1985-09-27 | Fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60212464A JPS6273576A (en) | 1985-09-27 | 1985-09-27 | Fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6273576A true JPS6273576A (en) | 1987-04-04 |
| JPH0530024B2 JPH0530024B2 (en) | 1993-05-07 |
Family
ID=16623071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60212464A Granted JPS6273576A (en) | 1985-09-27 | 1985-09-27 | Fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6273576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705474B2 (en) | 2006-02-03 | 2010-04-27 | Kabushiki Kaisha Toyota Jidoshokki | Connection structure for connecting flexible printed circuit to main substrate using a potting resin in a through-hole |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4408694C1 (en) * | 1994-03-15 | 1995-10-26 | Stocko Metallwarenfab Henkels | Device for feeding fasteners |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154772A (en) * | 1983-02-24 | 1984-09-03 | Toshiba Corp | Fuel cell |
| JPS6066A (en) * | 1983-06-16 | 1985-01-05 | Fuji Electric Corp Res & Dev Ltd | Sealing of fuel cell |
-
1985
- 1985-09-27 JP JP60212464A patent/JPS6273576A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154772A (en) * | 1983-02-24 | 1984-09-03 | Toshiba Corp | Fuel cell |
| JPS6066A (en) * | 1983-06-16 | 1985-01-05 | Fuji Electric Corp Res & Dev Ltd | Sealing of fuel cell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705474B2 (en) | 2006-02-03 | 2010-04-27 | Kabushiki Kaisha Toyota Jidoshokki | Connection structure for connecting flexible printed circuit to main substrate using a potting resin in a through-hole |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530024B2 (en) | 1993-05-07 |
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Legal Events
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