JPH08203553A - Solid polymer electrolyte fuel cell - Google Patents
Solid polymer electrolyte fuel cellInfo
- Publication number
- JPH08203553A JPH08203553A JP7007859A JP785995A JPH08203553A JP H08203553 A JPH08203553 A JP H08203553A JP 7007859 A JP7007859 A JP 7007859A JP 785995 A JP785995 A JP 785995A JP H08203553 A JPH08203553 A JP H08203553A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- solid polymer
- polymer electrolyte
- fuel cell
- fastening
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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
【０００１】[0001]
【産業上の利用分野】この発明は固体高分子電解質型燃
料電池の構造に係り、特にスタックの積層および冷却の
構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a solid polymer electrolyte fuel cell, and more particularly to a stacking and cooling structure of a stack.
【０００２】[0002]
【従来の技術】固体高分子電解質型燃料電池は固体高分
子電解質膜の二つの主面にそれぞれ電極であるアノード
とカソードを配して形成される。アノードまたはカソー
ドの各電極は電極基材上に電極触媒層を配している。固
体高分子電解質膜（固体高分子膜と略称する）はスルホ
ン酸基を持つポリスチレン系の陽イオン交換膜をカチオ
ン導電性膜として使用したもの、フロロカーボンスルホ
ン酸とポリビニリデンフロライドの混合膜、あるいはフ
ロロカーボンマトリックスにトリフロロエチレンをグラ
フト化したものなどが知られているが最近ではパーフロ
ロカーボンスルホン酸膜を用いて燃料電池の長寿命化を
図ったものが知られるに至った。2. Description of the Related Art A solid polymer electrolyte fuel cell is formed by disposing an anode and a cathode, which are electrodes, on two main surfaces of a solid polymer electrolyte membrane. Each electrode of the anode or the cathode has an electrode catalyst layer arranged on an electrode base material. The solid polymer electrolyte membrane (abbreviated as solid polymer membrane) uses a polystyrene cation exchange membrane having a sulfonic acid group as a cation conductive membrane, a mixed membrane of fluorocarbon sulfonic acid and polyvinylidene fluoride, or A fluorocarbon matrix grafted with trifluoroethylene is known, but recently, a perfluorocarbon sulfonic acid membrane has been used to extend the life of a fuel cell.
【０００３】固体高分子電解質膜は分子中にプロトン
（水素イオン）交換基を有し、飽和に含水させることに
より常温で２０Ω・ｃｍ以下の比抵抗を示しプロトン導
電性電解質として機能する。飽和含水量は温度によって
可逆的に変化する。電極基材は多孔質体で燃料電池の反
応ガス供給手段または反応ガス排出手段および集電体と
して機能する。アノード（燃料極）またはカソード（空
気極）の電極においては三相界面が形成され電気化学反
応が起こる。The solid polymer electrolyte membrane has a proton (hydrogen ion) exchange group in the molecule, and when it is saturated with water, it exhibits a specific resistance of 20 Ω · cm or less at room temperature and functions as a proton conductive electrolyte. The saturated water content changes reversibly with temperature. The electrode base material is a porous body and functions as a reaction gas supply means or a reaction gas discharge means and a current collector of the fuel cell. At the anode (fuel electrode) or cathode (air electrode) electrode, a three-phase interface is formed and an electrochemical reaction occurs.
【０００４】アノードでは（１）式の反応が起こる。 Ｈ2 ＝２Ｈ+ ＋２ｅ （１） カソードでは（２）式の反応が起こる。 １／２Ｏ2 ＋２Ｈ+ ＋２ｅ＝Ｈ2 Ｏ （２） つまりアノードにおいては系の外部より供給された水素
がプロトンと電子を生成する。生成したプロトンはイオ
ン交換膜中をカソードに向かって移動し電子は外部回路
を通ってカソードに移動する。一方カソードにおいては
系の外部より供給された酸素とイオン交換膜中をアノー
ドより移動してきたプロトンと外部回路より移動してき
た電子が反応し、水を生成する。At the anode, the reaction of the formula (1) occurs. H 2 = 2H + + 2e (1) At the cathode, the reaction of the formula (2) occurs. 1 / 2O 2 + 2H + + 2e = H 2 O (2) That is, at the anode, hydrogen supplied from the outside of the system produces protons and electrons. The generated protons move toward the cathode in the ion exchange membrane, and the electrons move to the cathode through an external circuit. On the other hand, in the cathode, oxygen supplied from the outside of the system reacts with protons moving from the anode in the ion exchange membrane and electrons moving from the external circuit to generate water.
【０００５】図４は従来の固体高分子電解質型燃料電池
の単セルを示す断面図である。アノード１Ｂおよびカソ
ード１Ｃは厚さ１００μｍの固体高分子電解質膜１Ａの
両主面に接して積層され固体高分子膜／電極集合体１を
構成する。電極の厚さは３００μｍである。電極は前述
のように電極基材上に電極触媒層を配して構成されるが
この電極触媒層は一般に微小な粒子状の白金触媒と水に
対する撥水性を有するフッ素樹脂から構成されており、
三相界面と反応ガスの効率的な拡散を維持するための細
孔が十分形成される。電極基材は前記触媒層を支持す
る。FIG. 4 is a sectional view showing a unit cell of a conventional solid polymer electrolyte fuel cell. The anode 1B and the cathode 1C are laminated in contact with both main surfaces of a solid polymer electrolyte membrane 1A having a thickness of 100 μm to form a solid polymer membrane / electrode assembly 1. The thickness of the electrode is 300 μm. The electrode is formed by disposing the electrode catalyst layer on the electrode base material as described above, but the electrode catalyst layer is generally composed of a fine particulate platinum catalyst and a fluororesin having water repellency,
Sufficient pores are formed to maintain efficient diffusion of the reaction gas with the three-phase interface. The electrode base material supports the catalyst layer.
【０００６】電極の配置された固体高分子電解質膜１Ａ
の外側には反応ガスを外部から導いてアノード１Ｂまた
はカソード１Ｃに供給する一対の例えばカーボンからな
るセパレータ２Ａ，２Ｂが設けられる。セパレータ２
Ａ，２Ｂはその主面に反応ガスを導く燃料ガス室３Ａま
たは酸化剤ガス室３Ｂを備えるガス不透過性板である。
燃料ガス室３Ａまたは酸化剤ガス室３Ｂの寸法は深さ１
ｍｍ，幅員１ｍｍである。セパレータ２Ａ，２Ｂには燃
料ガス供給孔３１、酸化剤ガス供給孔３２、燃料ガス排
出孔３４、酸化剤ガス排出孔３５が設けられる。固体高
分子膜／電極集合体１はセパレータ２Ａと２Ｂによりガ
スシール５を介して挟まれ固体高分子膜／電極集合体１
を構成する。ガスシール５は切り込み３３を備え、固体
高分子膜／電極集合体１への燃料ガスと酸化剤ガスの選
択的な供給、排出を行う。Solid polymer electrolyte membrane 1A in which electrodes are arranged
A pair of separators 2A, 2B made of, for example, carbon for guiding the reaction gas from the outside and supplying it to the anode 1B or the cathode 1C is provided on the outside of the. Separator 2
A and 2B are gas impermeable plates provided with a fuel gas chamber 3A or an oxidant gas chamber 3B for guiding the reaction gas to the main surface thereof.
The fuel gas chamber 3A or the oxidant gas chamber 3B has a depth of 1
mm, width 1 mm. The separators 2A and 2B are provided with a fuel gas supply hole 31, an oxidant gas supply hole 32, a fuel gas discharge hole 34, and an oxidant gas discharge hole 35. The solid polymer membrane / electrode assembly 1 is sandwiched between the separators 2A and 2B via a gas seal 5 and the solid polymer membrane / electrode assembly 1
Is configured. The gas seal 5 has a notch 33, and selectively supplies and discharges the fuel gas and the oxidant gas to the solid polymer membrane / electrode assembly 1.
【０００７】図５は従来の締結板を示す斜視図である。
締結板１０は金属からなる中実板であり締結ボルトが間
挿する貫通孔１６と反応ガス供給孔１４と反応ガス排出
孔１５を備える。反応ガス供給孔１４はシール溝１４Ａ
と図示しないガス配管の取り付けネジ１４Ｂを備える。
反応ガス排出孔１５はシール溝１５Ａと図示しないガス
配管の取り付けネジ１５Ｂを備える。FIG. 5 is a perspective view showing a conventional fastening plate.
The fastening plate 10 is a solid plate made of metal and has a through hole 16 into which a fastening bolt is inserted, a reaction gas supply hole 14, and a reaction gas discharge hole 15. The reaction gas supply hole 14 has a seal groove 14A.
And a mounting screw 14B for a gas pipe (not shown).
The reaction gas discharge hole 15 is provided with a seal groove 15A and a mounting screw 15B for a gas pipe (not shown).
【０００８】図６は従来の固体高分子電解質型燃料電池
を示す斜視図である。単セル６は複数個が積層されて単
セル集合体となり、集電板８は上記単セル集合体の電流
を取り出す。電気絶縁板９は単セル集合体と締結板１０
を絶縁する。電池集合体は締結板１０と締結ボルト１
１，締結具１３，皿バネ１２を用い組み立てられる。単
セル６内では反応ガスは鉛直方向に流れる。FIG. 6 is a perspective view showing a conventional solid polymer electrolyte fuel cell. A plurality of the single cells 6 are stacked to form a single cell assembly, and the current collector 8 takes out the current of the single cell assembly. The electric insulating plate 9 is a single cell assembly and a fastening plate 10.
Insulate. The battery assembly includes a fastening plate 10 and a fastening bolt 1.
1, the fastener 13 and the disc spring 12 are used for assembly. In the unit cell 6, the reaction gas flows in the vertical direction.
【０００９】固体高分子電解質型燃料電池の運転温度は
固体高分子電解質膜の電気抵抗を小さくして発電効率を
高めるために通常５０ないし１００℃の温度で運転され
る。この単セルの発生する電圧は１Ｖ以下であるので、
実用上は電圧を高めるために前記単セルを複数個直列に
積層してスタックとして使用される。燃料電池では、一
般に発生電力にほぼ相当する熱量を熱として発生し、こ
の熱により単セルを多数積層したスタックにおいてはス
タック内に温度の分布が生じる。そこでスタックでは、
冷却板を内蔵してスタックの温度を単セルの面方向，積
層方向にできるだけ均一になるようにする。ここで一般
に冷却媒体としては水、空気等が用いられる。冷却板は
冷却媒体を供給することで余剰熱を除去して冷却をす
る。The operating temperature of the solid polymer electrolyte fuel cell is usually 50 to 100 ° C. in order to reduce the electric resistance of the solid polymer electrolyte membrane and increase the power generation efficiency. Since the voltage generated by this single cell is 1 V or less,
In practice, a plurality of the single cells are stacked in series to increase the voltage and used as a stack. In a fuel cell, generally, a heat amount substantially equivalent to the generated power is generated as heat, and this heat causes a temperature distribution in the stack in a stack in which a large number of single cells are stacked. So in the stack,
A cooling plate is built in to make the stack temperature as uniform as possible in the plane and stacking directions of the unit cells. Here, water, air or the like is generally used as the cooling medium. The cooling plate is cooled by supplying a cooling medium to remove excess heat.
【００１０】前述のとおり固体高分子電解質型燃料電池
では、固体高分子電解質膜１Ａを飽和に含水させること
により膜の比抵抗が小さくなり、膜はプロトン導電性電
解質として機能する。したがって、固体高分子電解質型
燃料電池の発電効率を高く維持するためには、膜の含水
状態を飽和状態に維持することが必要である。膜の乾燥
を防いで発電効率を維持するために、反応ガスには水蒸
気が添加され、膜からガスへの水の蒸発が抑えられる。As described above, in the solid polymer electrolyte fuel cell, the specific resistance of the membrane is reduced by making the solid polymer electrolyte membrane 1A saturated with water, and the membrane functions as a proton conductive electrolyte. Therefore, in order to keep the power generation efficiency of the solid polymer electrolyte fuel cell high, it is necessary to keep the water content of the membrane saturated. In order to prevent the membrane from drying and maintain power generation efficiency, water vapor is added to the reaction gas to suppress evaporation of water from the membrane to the gas.
【００１１】[0011]
【発明が解決しようとする課題】しかしながらこのよう
な従来の固体高分子電解質型燃料電池にあっては締結板
は最も重量の大きな構成部材であり、固体高分子電解質
型燃料電池全体の重量の約３０ないし５０％を占める。
今後発電面積が拡大し単セル積層枚数が増加するにつれ
て締結板の重量は一層増大することが予想される。締結
板の重量が大きいと固体高分子電解質型燃料電池の組み
立て作業が困難となり、製品輸送の効率も低下する。However, in such a conventional solid polymer electrolyte fuel cell, the fastening plate is the heaviest component member, and is about the weight of the solid polymer electrolyte fuel cell as a whole. It accounts for 30 to 50%.
It is expected that the weight of the fastening plate will further increase as the power generation area increases and the number of single cell stacks increases. If the weight of the fastening plate is large, it becomes difficult to assemble the solid polymer electrolyte fuel cell, and the efficiency of product transportation is also reduced.
【００１２】また締結板は固体高分子電解質型燃料電池
の放熱体として作用し、締結板と接する単セルの温度が
低下し締結板と接する単セルの発電効率が低下する。さ
らに従来の締結板にあっては締結板を貫通する反応ガス
供給孔１４，反応ガス排出孔１５内を反応ガスが通流す
る際に反応ガスが冷却され反応ガス供給孔１４，反応ガ
ス排出孔１５内に水滴が発生し反応ガスの流れを悪く
し、結果として固体高分子電解質型燃料電池の発電効率
を下げるという問題があった。Further, the fastening plate acts as a radiator of the solid polymer electrolyte fuel cell, and the temperature of the single cell in contact with the fastening plate is lowered, so that the power generation efficiency of the single cell in contact with the fastening plate is lowered. Further, in the conventional fastening plate, the reaction gas is cooled when the reaction gas flows through the reaction gas supply hole 14 and the reaction gas discharge hole 15 penetrating the fastening plate, and the reaction gas supply hole 14 and the reaction gas discharge hole are formed. There has been a problem that water droplets are generated in 15 and the flow of the reaction gas is deteriorated, resulting in lowering the power generation efficiency of the solid polymer electrolyte fuel cell.
【００１３】この発明は上述の点に鑑みてなされ、その
目的は締結板の軽量化と放熱性の低下を図ることにより
製造容易で特性に優れる固体高分子電解質型燃料電池を
提供することにある。The present invention has been made in view of the above points, and an object thereof is to provide a solid polymer electrolyte fuel cell which is easy to manufacture and has excellent characteristics by reducing the weight of a fastening plate and reducing the heat dissipation. .
【００１４】[0014]
【課題を解決するための手段】上述の目的はこの発明に
よれば固体高分子電解質膜とその両面に配設された電極
からなる固体高分子膜／電極集合体を反応ガス供給孔と
反応ガス排出孔を備えた二つのセパレータで挟んで単セ
ルを構成し、該単セルの複数個を二つの締結板の間にお
いて積層し締結ボルトを介して締結してスタックを形成
し、前記スタックに締結板を介して燃料ガスと酸化剤ガ
スの反応ガスを供給する固体高分子電解質型燃料電池に
おいて、締結板はハニカム板の両主面に板状パッキング
を介して端板を固定してなり、ここにハニカム板はハニ
カム体をフレームに支持したものであり、板状パッキン
グと端板はそれぞれ相互に連通するガス通流孔と支持孔
を備え、板状パッキングは端板によりハニカム体の主面
に圧接されるとともに板状パッキングのガス通流孔がハ
ニカム体の中空部と連通するとすることにより達成され
る。According to the present invention, a solid polymer membrane / electrode assembly comprising a solid polymer electrolyte membrane and electrodes arranged on both sides thereof is provided with a reaction gas supply hole and a reaction gas. A single cell is formed by sandwiching it with two separators having discharge holes, a plurality of the single cells are stacked between two fastening plates and fastened via fastening bolts to form a stack, and the fastening plates are attached to the stack. In a solid polymer electrolyte fuel cell in which a reaction gas of a fuel gas and an oxidant gas is supplied via a fastening plate, end plates are fixed to both main surfaces of a honeycomb plate through plate-like packings, and a honeycomb plate is formed on the fastening plate. The plate supports the honeycomb body on a frame, and the plate-like packing and the end plate each have a gas flow hole and a support hole that communicate with each other, and the plate-like packing is pressed against the main surface of the honeycomb body by the end plate. Toto Gas through holes of the plate packing is achieved by a communication with the hollow portion of the honeycomb body.
【００１５】上述の発明において一端にガス配管取り付
け用のテーパネジ、他端にはシール溝を有するとともに
二つの端板の間を間挿し且つ二つの端板の支持孔に支持
される熱伝導率の低いフィッティングを備えるとするこ
とが有効である。またフィッティングはフッ素樹脂であ
るとすることが有効である。In the above-described invention, a fitting having a taper screw for attaching a gas pipe at one end and a seal groove at the other end, which is interposed between two end plates and is supported by the support holes of the two end plates, has a low thermal conductivity. It is effective to have Further, it is effective that the fitting is made of fluororesin.
【００１６】[0016]
【作用】ハニカム体の中空部は締結板の軽量化と機械的
な補強の効果を持つとともにガス通流の働きを持つ。締
結板にハニカム体を使用するとハニカム体は薄肉ででき
ているから熱伝導性が低い上に空気による保温性が加わ
って放熱性の低い締結板が得られる。The function of the hollow portion of the honeycomb body is to reduce the weight of the fastening plate and mechanically reinforce it, and also to let gas flow. When the honeycomb body is used for the fastening plate, the honeycomb body is made of a thin wall, so that the fastening plate has low heat conductivity and heat retention due to air, and thus has low heat dissipation.
【００１７】フィッティングを用いて反応ガスを通流さ
せると、フィッティングは熱伝導率が低いので反応ガス
が直接ハニカム体の内部を通流する場合に比較して締結
板により冷却される度合が一層少なくなる。フッ素樹脂
は熱伝導率が小さくフィッティングに好適に用いられ
る。When the reaction gas is passed through the fitting, the fitting has a low thermal conductivity, so that the reaction gas is cooled by the fastening plate to a lesser degree than when the reaction gas is directly passed through the inside of the honeycomb body. Become. Fluororesin has a small thermal conductivity and is suitably used for fitting.
【００１８】[0018]
【実施例】次にこの発明の実施例を図面に基いて説明す
る。 実施例１ 図１はこの発明の実施例に係る固体高分子電解質型燃料
電池の締結板を示す分解斜視図である。Embodiments of the present invention will now be described with reference to the drawings. Example 1 FIG. 1 is an exploded perspective view showing a fastening plate of a solid polymer electrolyte fuel cell according to an example of the present invention.
【００１９】アルミニウム製のハニカム体１７Ｂが同じ
くアルミニウム製のフレーム１７Ａに溶接により支持さ
れハニカム板１７となる。ハニカム体１７Ｂはアルミニ
ウム製の六角パイプを所定の長さに切断し、得られた中
空六角柱を並列的に接着して製造される。接着により得
られたハニカム体１７Ｂの主面はフレーム１７Ａの開口
面と同一平面上にある。板状パッキング１８はエチレン
プロピレン共重合体またはニトリルゴム製の板材であ
り、ガス通流孔１８Ａが四個と貫通孔１８Ｂが六個穿設
されている。端板１９はアルミニウム製であり、貫通孔
１９Ｂが六個と支持孔１９Ａが四個穿設されている。端
板１９の貫通孔１９Ｂと端板２０の貫通孔２０Ｂには締
結ボルトが間挿する。支持孔１９Ａは座ぐり穴である。
端板２０はアルミニウム製であり、貫通孔２０Ｂが六個
と支持孔２０Ａが四個穿設されている。フィッティング
２２はその一端にシール溝２４があり他端にはテーパネ
ジが設けてある。フィッティング２２はフッ素樹脂製で
あり、端板１９の支持孔１９Ａから始まり板状パッキン
グ１８のガス通流孔１８Ａと、ハニカム板１７のハニカ
ム体１７Ｂを構成する中空六角柱の中空部を間挿し、端
板２０の支持孔２０Ａに終わる。四個の支持孔１９Ａは
それぞれ燃料ガス供給孔と酸化剤ガス供給孔と燃料ガス
排出孔と酸化剤ガス排出孔に対応している。The honeycomb body 17B made of aluminum is supported on the frame 17A made of aluminum by welding to form the honeycomb plate 17 . The honeycomb body 17B is manufactured by cutting a hexagonal pipe made of aluminum into a predetermined length and bonding the obtained hollow hexagonal columns in parallel. The main surface of the honeycomb body 17B obtained by bonding is flush with the opening surface of the frame 17A. The plate-like packing 18 is a plate material made of ethylene propylene copolymer or nitrile rubber, and has four gas through holes 18A and six through holes 18B. The end plate 19 is made of aluminum and has six through holes 19B and four support holes 19A. Fastening bolts are inserted in the through holes 19B of the end plate 19 and the through holes 20B of the end plate 20. The support hole 19A is a counterbore.
The end plate 20 is made of aluminum and has six through holes 20B and four support holes 20A. The fitting 22 has a seal groove 24 at one end and a taper screw at the other end. The fitting 22 is made of fluororesin, and starts from the support hole 19A of the end plate 19 and inserts the gas flow hole 18A of the plate-like packing 18 and the hollow portion of the hollow hexagonal column forming the honeycomb body 17B of the honeycomb plate 17 , It ends in the support hole 20A of the end plate 20. The four support holes 19A correspond to the fuel gas supply hole, the oxidant gas supply hole, the fuel gas discharge hole, and the oxidant gas discharge hole, respectively.
【００２０】端板１９，２０と板状パッキング１８とハ
ニカム板１７はエチレンプロピレン共重合体系またはニ
トリルゴム系接着剤を介して接合される。テーパネジは
図示しないガス配管を接続する。シール溝２４は図示し
ないパッキングがはめ込まれ単セル６に押しつけられ
る。図２はこの発明の実施例に係る固体高分子電解質型
燃料電池を示す斜視図である。The end plates 19 and 20, the plate-like packing 18 and the honeycomb plate 17 are joined together through an ethylene-propylene copolymer-based or nitrile rubber-based adhesive. The taper screw connects a gas pipe (not shown). The seal groove 24 is fitted with packing (not shown) and pressed against the unit cell 6. FIG. 2 is a perspective view showing a solid polymer electrolyte fuel cell according to an embodiment of the present invention.
【００２１】単セル６の複数個を積層し、単セル６の積
層方向の両側を集電板８の一対と電気絶縁板９の一対を
用いて順次挟持し、フィッティング２２，２３を締結板
２１の支持孔１９Ａに装着し、締結板２１の一対により
締結ボルト１１、締結具１３、皿バネ１２を介して、単
セル６と集電板８と電気絶縁板９の積層体を締結する。A plurality of unit cells 6 are stacked, and both sides in the stacking direction of the unit cells 6 are sequentially sandwiched by a pair of current collector plates 8 and a pair of electric insulating plates 9, and the fittings 22 and 23 are fastened by fastening plates 21. And is fastened to the support hole 19A of the above, and the laminated body of the unit cell 6, the current collector plate 8 and the electrical insulating plate 9 is fastened by the pair of fastening plates 21 via the fastening bolt 11, the fastener 13 and the disc spring 12.
【００２２】集電板８と電気絶縁板９にはそれぞれ締結
板２１の四個の支持孔１９Ａ，２０Ａと連通する貫通孔
があり、これらは単セル６の燃料ガス供給孔，酸化剤ガ
ス供給孔，燃料ガス排出孔，酸化剤ガス排出孔にそれぞ
れ連通する。締結板２１はハニカム板１７を用いている
ために軽量であり、燃料電池組み立てや燃料電池の輸送
の効率を高める。Each of the current collector plate 8 and the electric insulating plate 9 has a through hole which communicates with the four support holes 19A and 20A of the fastening plate 21, which are a fuel gas supply hole of the single cell 6 and an oxidant gas supply. The hole, the fuel gas discharge hole, and the oxidant gas discharge hole communicate with each other. Since the fastening plate 21 uses the honeycomb plate 17 , it is lightweight and enhances the efficiency of fuel cell assembly and fuel cell transportation.
【００２３】また締結板２１はハニカム板１７を用いて
いるために熱伝導率が低いから締結板は放熱体として機
能することがなく、締結板２１と接する単セルが締結板
により冷却されることがないので締結板２１と接する単
セルは温度低下を起こさず締結板と接する単セルの発電
効率が良好である。反応ガスがフッ素樹脂製のフィッテ
ィング２２，２３を通流する際に、フッ素樹脂は熱伝導
率が低いために、反応ガスは締結板により冷却すること
が少なく、従って締結板に水滴が溜まって締結板２１と
接する単セルが水滴により閉塞するということがない。
これは締結板２１と接する単セルに反応ガスが充分に供
給されることを意味する。 実施例２ 図３はこの発明の異なる実施例に係る固体高分子電解質
型燃料電池の締結板を示す斜視図である。Further, since the fastening plate 21 uses the honeycomb plate 17 and has a low thermal conductivity, the fastening plate does not function as a heat radiator, and the single cells in contact with the fastening plate 21 are cooled by the fastening plate. Therefore, the unit cell in contact with the fastening plate 21 does not cause a temperature drop, and the power generation efficiency of the unit cell in contact with the fastening plate is good. When the reaction gas flows through the fittings 22 and 23 made of fluororesin, since the fluororesin has a low thermal conductivity, the reaction gas is less likely to be cooled by the fastening plate. The single cell that is in contact with the plate 21 will not be blocked by water droplets.
This means that the reaction gas is sufficiently supplied to the unit cell in contact with the fastening plate 21. Embodiment 2 FIG. 3 is a perspective view showing a fastening plate of a solid polymer electrolyte fuel cell according to a different embodiment of the present invention.
【００２４】締結板２１にはフィッティングは装着され
ない。反応ガスは直接的にハニカム体１７Ｂの中空六角
柱と端板１９，２０の支持孔１９Ａ，２０Ｂの内部を流
れる。端板１９にはシール溝２４Ａが設けられており、
シール溝２４Ａが単セル６に圧接される。端板２０の支
持孔２０Ａには図示しないガス配管取り付けネジが設け
られる。No fitting is attached to the fastening plate 21. The reaction gas directly flows through the hollow hexagonal column of the honeycomb body 17B and the inside of the support holes 19A and 20B of the end plates 19 and 20. The end plate 19 is provided with a seal groove 24A,
The seal groove 24A is pressed against the unit cell 6. A gas pipe mounting screw (not shown) is provided in the support hole 20A of the end plate 20.
【００２５】上述の実施例においてはハニカム体の中空
部は六角柱型としたが、これに限定されるものではなく
八角柱型等の中空の孔部を有していれば良い。In the above-mentioned embodiments, the hollow portion of the honeycomb body has a hexagonal prism type, but the present invention is not limited to this, and it may have an octagonal prism type hollow hole.
【００２６】[0026]
【発明の効果】この発明によれば締結板の内部がハニカ
ム構造となっているので、締結板の軽量化が達成され固
体高分子電解質型燃料電池の製造や運搬が容易になる。
また締結板の放熱性が低下するために締結板に接する単
セルに水滴が流れたり締結板に接する単セル温度が低下
するようなことがなく特性に優れる固体高分子電解質型
燃料電池が得られる。According to the present invention, since the inside of the fastening plate has a honeycomb structure, the weight of the fastening plate is reduced, and the manufacture and transportation of the solid polymer electrolyte fuel cell are facilitated.
Also, because the heat dissipation of the fastening plate is reduced, water droplets do not flow into the unit cells in contact with the fastening plate and the temperature of the unit cells in contact with the fastening plate does not drop, and a solid polymer electrolyte fuel cell with excellent characteristics can be obtained. .
【００２７】さらに締結板にフッ素樹脂製のフィッティ
ングを装着すると反応ガスの締結板による冷却が一層低
減する効果が得られる。Further, when a fitting made of fluororesin is attached to the fastening plate, the effect of further reducing the cooling of the reaction gas by the fastening plate can be obtained.
【図１】この発明の実施例に係る固体高分子電解質型燃
料電池の締結板を示す分解斜視図FIG. 1 is an exploded perspective view showing a fastening plate of a solid polymer electrolyte fuel cell according to an embodiment of the present invention.
【図２】この発明の実施例に係る固体高分子電解質型燃
料電池を示す斜視図FIG. 2 is a perspective view showing a solid polymer electrolyte fuel cell according to an embodiment of the present invention.
【図３】この発明の異なる実施例に係る固体高分子電解
質型燃料電池の締結板を示す斜視図FIG. 3 is a perspective view showing a fastening plate of a solid polymer electrolyte fuel cell according to another embodiment of the present invention.
【図４】従来の固体高分子電解質型燃料電池の単セルを
示す断面図FIG. 4 is a sectional view showing a single cell of a conventional solid polymer electrolyte fuel cell.
【図５】従来の締結板を示す斜視図FIG. 5 is a perspective view showing a conventional fastening plate.
【図６】従来の固体高分子電解質型燃料電池を示す斜視
図FIG. 6 is a perspective view showing a conventional solid polymer electrolyte fuel cell.
１ 固体高分子膜／電極集合体 １Ａ 固体高分子膜 １Ｂ アノード １Ｃ カソード ２Ａ セパレータ ２Ｂ セパレータ ３Ａ 燃料ガス室 ３Ｂ 酸化剤ガス室 ６ 単セル ８ 集電板 ９ 電気絶縁板 １０ 締結板 １１ 締結ボルト １２ 皿バネ １３ 締結具 １４ 反応ガス供給孔 １４Ａ シール溝 １４Ｂ 取り付けネジ １５ 反応ガス排出孔 １５Ａ シール溝 １５Ｂ 取り付けネジ １６ 貫通孔 １７ ハニカム板 １７Ａ フレーム １７Ｂ ハニカム体 １８ 状板パッキング １８Ｂ ガス通流孔 １９ 端板 １９Ａ 支持孔 １９Ｂ 貫通孔 ２０ 端板 ２０Ａ 支持孔 ２０Ｂ 貫通孔 ２１ 締結板 ２２ フィッティング ２３ フィッティング ２４ シール溝 ２４Ａ シール溝 1 Solid Polymer Membrane / Electrode Assembly 1A Solid Polymer Membrane 1B Anode 1C Cathode 2A Separator 2B Separator 3A Fuel Gas Chamber 3B Oxidant Gas Chamber 6 Single Cell 8 Current Collector Plate 9 Electrical Insulation Plate 10 Fastening Plate 11 Fastening Bolt 12 Plates Spring 13 Fasteners 14 Reaction gas supply hole 14A Seal groove 14B Mounting screw 15 Reaction gas discharge hole 15A Seal groove 15B Mounting screw 16 Through hole 17 Honeycomb plate 17A Frame 17B Honeycomb body 18 Plate packing 18B Gas flow hole 19 End plate 19A Support hole 19B Through hole 20 End plate 20A Support hole 20B Through hole 21 Fastening plate 22 Fitting 23 Fitting 24 Seal groove 24A Seal groove
Claims (3)
た電極からなる固体高分子膜／電極集合体を反応ガス供
給孔と反応ガス排出孔を備えた二つのセパレータで挟ん
で単セルを構成し、該単セルの複数個を二つの締結板の
間において積層し締結ボルトを介して締結してスタック
を形成し、前記スタックに締結板を介して燃料ガスと酸
化剤ガスの反応ガスを供給する固体高分子電解質型燃料
電池において、締結板はハニカム板の両主面に板状パッ
キングを介して端板を固定してなり、ここにハニカム板
はハニカム体をフレームに支持したものであり、板状パ
ッキングと端板はそれぞれ相互に連通するガス通流孔と
支持孔を備え、板状パッキングは端板によりハニカム体
の主面に圧接されるとともに板状パッキングのガス通流
孔がハニカム体の中空部と連通するものであることを特
徴とする固体高分子電解質型燃料電池。1. A single cell in which a solid polymer membrane / electrode assembly comprising a solid polymer electrolyte membrane and electrodes arranged on both sides thereof is sandwiched between two separators having a reaction gas supply hole and a reaction gas discharge hole. A plurality of unit cells are stacked between two fastening plates and fastened via fastening bolts to form a stack, and a reaction gas of a fuel gas and an oxidant gas is supplied to the stack through the fastening plates. In the solid polymer electrolyte fuel cell in which the fastening plate has end plates fixed to both main surfaces of the honeycomb plate via plate-shaped packing, the honeycomb plate is one in which the honeycomb body is supported by a frame, The plate-like packing and the end plate each have a gas passage hole and a support hole that communicate with each other. The plate-like packing is pressed against the main surface of the honeycomb body by the end plate, and the gas passage hole of the plate-like packing has a honeycomb body body. of Solid polymer electrolyte fuel cell characterized in that communicating with the hollow portion.
にガス配管取り付け用のテーパネジ、他端にはシール溝
を有するとともに二つの端板の間を間挿し且つ二つの端
板の支持孔に固定される熱伝導率の低いフィッティング
を備えることを特徴とする固体高分子電解質型燃料電
池。2. The fuel cell according to claim 1, wherein one end has a taper screw for attaching a gas pipe, the other end has a seal groove, and the two end plates are interposed and fixed in a support hole of the two end plates. A solid polymer electrolyte fuel cell, comprising: a fitting having a low thermal conductivity.
ッティングはフッ素樹脂であることを特徴とする固体高
分子電解質型燃料電池。3. The solid polymer electrolyte fuel cell according to claim 2, wherein the fitting is a fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00785995A JP3149716B2 (en) | 1995-01-23 | 1995-01-23 | Solid polymer electrolyte fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00785995A JP3149716B2 (en) | 1995-01-23 | 1995-01-23 | Solid polymer electrolyte fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08203553A true JPH08203553A (en) | 1996-08-09 |
| JP3149716B2 JP3149716B2 (en) | 2001-03-26 |
Family
ID=11677383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00785995A Expired - Fee Related JP3149716B2 (en) | 1995-01-23 | 1995-01-23 | Solid polymer electrolyte fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3149716B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159629A (en) * | 1998-12-17 | 2000-12-12 | Ballard Power Systems Inc. | Volume effecient layered manifold assembly for electrochemical fuel cell stacks |
| WO2003088395A1 (en) * | 2002-04-17 | 2003-10-23 | Matsushita Electric Industrial Co., Ltd. | Polymeric electrolyte type fuel cell |
| WO2006049018A1 (en) * | 2004-11-01 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
| WO2006049019A1 (en) * | 2004-11-01 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
| JP2007323931A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Fuel cell stack |
| DE102005056342B4 (en) * | 2004-11-25 | 2008-08-28 | Honda Motor Co., Ltd. | fuel cell stack |
| JP2008277303A (en) * | 2002-04-30 | 2008-11-13 | General Motors Corp <Gm> | End plate for fuel cell stack structure |
| WO2010106753A1 (en) | 2009-03-17 | 2010-09-23 | パナソニック株式会社 | Fuel cell stack |
| JP2014232664A (en) * | 2013-05-29 | 2014-12-11 | トヨタ自動車株式会社 | Fuel cell stack |
| KR20170137997A (en) * | 2016-06-03 | 2017-12-14 | (주) 세라컴 | Battery pack |
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1995
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159629A (en) * | 1998-12-17 | 2000-12-12 | Ballard Power Systems Inc. | Volume effecient layered manifold assembly for electrochemical fuel cell stacks |
| WO2003088395A1 (en) * | 2002-04-17 | 2003-10-23 | Matsushita Electric Industrial Co., Ltd. | Polymeric electrolyte type fuel cell |
| US7294423B2 (en) | 2002-04-17 | 2007-11-13 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell having improved current collector plates and method of forming the same |
| JP2008277303A (en) * | 2002-04-30 | 2008-11-13 | General Motors Corp <Gm> | End plate for fuel cell stack structure |
| WO2006049018A1 (en) * | 2004-11-01 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
| WO2006049019A1 (en) * | 2004-11-01 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
| US7799480B2 (en) | 2004-11-25 | 2010-09-21 | Honda Motor Co., Ltd. | Fuel cell stack with dummy cell |
| DE102005056342B4 (en) * | 2004-11-25 | 2008-08-28 | Honda Motor Co., Ltd. | fuel cell stack |
| JP2007323931A (en) * | 2006-05-31 | 2007-12-13 | Sanyo Electric Co Ltd | Fuel cell stack |
| WO2010106753A1 (en) | 2009-03-17 | 2010-09-23 | パナソニック株式会社 | Fuel cell stack |
| US8076017B2 (en) | 2009-03-17 | 2011-12-13 | Panasonic Corporation | Fuel cell stack |
| JP2014232664A (en) * | 2013-05-29 | 2014-12-11 | トヨタ自動車株式会社 | Fuel cell stack |
| KR20170137997A (en) * | 2016-06-03 | 2017-12-14 | (주) 세라컴 | Battery pack |
| CN109403159A (en) * | 2017-08-16 | 2019-03-01 | 张跃 | A kind of ballastless track structure |
| CN109403210A (en) * | 2017-08-16 | 2019-03-01 | 张跃 | A kind of Viaduct Structure |
| CN110380096A (en) * | 2018-04-12 | 2019-10-25 | 武汉众宇动力***科技有限公司 | Fuel cell stack device and configuration method |
| CN110380096B (en) * | 2018-04-12 | 2024-03-19 | 武汉众宇动力***科技有限公司 | Fuel cell stack device and arrangement method |
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