JPH03225766A - Liquid holding device for fuel cell - Google Patents
Liquid holding device for fuel cellInfo
- Publication number
- JPH03225766A JPH03225766A JP2019573A JP1957390A JPH03225766A JP H03225766 A JPH03225766 A JP H03225766A JP 2019573 A JP2019573 A JP 2019573A JP 1957390 A JP1957390 A JP 1957390A JP H03225766 A JPH03225766 A JP H03225766A
- Authority
- JP
- Japan
- Prior art keywords
- shim
- reservoir
- fuel
- separating plate
- gas
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 title abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 239000002737 fuel gas Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 9
- 238000002637 fluid replacement therapy Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
- H01M8/04283—Supply means of electrolyte to or in matrix-fuel cells
-
- 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
-
- 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】
（イ）産業上の利用分野
本発明はマトリックス型燃料電池の補液装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a fluid replacement device for matrix fuel cells.
（ロ）従来の技術
この種電池において燐酸などの酸性電解液は正、負極間
に介在するマトリックスに保持されているが、電池作動
中反応ガスの流通（こよりマトリックスが乾燥し電池性
能を低下させる。そのため、電池スタック内に電解液リ
ザーバーを設けて外部から補給する方法がとられる。(b) Conventional technology In this type of battery, an acidic electrolyte such as phosphoric acid is held in a matrix interposed between the positive and negative electrodes, but during battery operation, the flow of reactive gas (this causes the matrix to dry and degrade battery performance. Therefore, a method is adopted in which an electrolyte reservoir is provided inside the battery stack and refilled from the outside.
従来は第５図の要部平面図に示すように各ガス分離板（
イ）の燃料極（Ｎｌシール面にリザーバー（ロ）を形成
し、第６図の要部断面図に示すようにその上にマトリッ
クス（Ｍ＋を介して空気４ｉｌ＝（Ｐｌを配置した構成
であった。Conventionally, each gas separation plate (
A reservoir (b) is formed on the sealing surface of the fuel electrode (Nl) of the fuel electrode (b), and air 4il=(Pl) is placed on top of it through the matrix (M+), as shown in the cross-sectional view of the main part in Figure 6. Ta.
この構成ではりザーバー長が大きいなめ補液が円滑に行
われるという利点を有するが、リザーバー（ロ）外周の
Ｄ部にはシムを設けられないのでシール性が低く、リザ
ーバー（ロ）内の電解液が空気流通溝（ｐ）へ漏れやす
く、この溝内の液抜きが必要となるなどメンテナンス上
の問題があった。This configuration has the advantage that fluid replacement is performed smoothly due to the large length of the reservoir, but since no shims can be provided on the D portion of the outer periphery of the reservoir (B), the sealing performance is poor, and the electrolyte in the reservoir (B) There were maintenance problems such as easy leakage of liquid into the air circulation groove (p) and the need to drain liquid from the groove.
（ハ） 発明が解決しようとする課題
本発明は前記問題点から補液時のシール性の向上を検討
する必要性が生じ、補液能力よりもシール性に重点をお
いてリザーバーの形状、構成に改良を加え、メンテナン
スの繁雑さを解消するものである。(c) Problems to be Solved by the Invention In view of the above-mentioned problems, it became necessary to consider improving the sealing performance during fluid replacement, and the present invention focused on improving the sealing performance rather than the fluid replacement ability, and improved the shape and structure of the reservoir. This eliminates the complexity of maintenance.
（ニ）問題点を解決するための手段
本発明は燃料極・空気ｒｉ間に電解質マトリックスを介
在させたセルと、表裏各面（二人々交錯する方向の燃料
ガス及び空気の各流通溝を形設したガス分離板とを交互
に積重して電池スタックが構成され、前記各ガス分離板
の燃料極側シール面のコーナー部に、互いに貫通孔で連
通ずる略三角形状の補液用リザーバーを形設し、前記リ
ザーバーと同形状の切欠を有するシムの拡大部と隣接ガ
ス分離板の空気極側シール面に設けたシムの延長部によ
り、前記リザーバー外周がマトリックスを介して前記一
対のシムでシールされたものである。(d) Means for Solving the Problems The present invention provides a cell in which an electrolyte matrix is interposed between the fuel electrode and the air ri, and each of the front and back surfaces (the fuel gas and air flow grooves in the direction in which the two people intersect) are formed. A battery stack is constructed by alternately stacking the gas separation plates provided, and a substantially triangular replacement fluid reservoir is formed at the corner portion of the fuel electrode side sealing surface of each gas separation plate, which communicates with each other through a through hole. The outer periphery of the reservoir is sealed with the pair of shims through the matrix by the enlarged part of the shim having a notch with the same shape as the reservoir and the extended part of the shim provided on the air electrode side sealing surface of the adjacent gas separation plate. It is what was done.
（ホ）′作 用
本発明では一方のガス分離板コーナー部に略三角形状の
りザーバーを設けることにより隣接ガス分離板にもシム
を設置することが可能となり、リザーバー外周は上下シ
フ、 ｌ、こよりシール性が同りし、従来のような電解
液のガス渭への漏比を防出することができる。(e)' Effect In the present invention, by providing a substantially triangular glue reservoir at the corner of one gas separation plate, it is possible to install a shim on the adjacent gas separation plate, and the outer periphery of the reservoir is vertically shifted. The sealing performance is the same, and it is possible to prevent leakage of electrolyte into the gas stream as in the conventional case.
（へ）実施例
本発明の実施例を図について説明する。第１図は単セル
の模式的分解斜面図、第２図はガス分離板の平面図、第
３図は第２図のＡ−Ａ線に沿った要部断面図である。(f) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic exploded perspective view of a single cell, FIG. 2 is a plan view of a gas separation plate, and FIG. 3 is a sectional view of a main part taken along line A--A in FIG. 2.
電池スタックは燃料極（Ｎ）と空気極（Ｐ）との間に電
解質マトリックス（Ｍ）を介在させたセル（１）と、表
裏各面に互いに交錯方向の燃料ガス流通溝（ｎ）及び空
気流通（ｐ）を形成したガス分離板（２）とを交互に積
重して構成される。The battery stack consists of a cell (1) in which an electrolyte matrix (M) is interposed between a fuel electrode (N) and an air electrode (P), and fuel gas distribution grooves (n) and air in mutually intersecting directions on the front and back surfaces. It is constructed by alternately stacking gas separation plates (2) that form a flow (p).
各ガス分離板（２）は燃料極側シール面の両側コーナー
部に、略三角形状の補液用リザーバー（３）が形設され
、シール面に貼付けたシム（４）にはこのリザーバー（
３）と同形状の切欠を有するシム拡大部（４°）を有す
る。リザーバー（３）上にはマトリックス（Ｍ）を介し
て空気ｆ！（Ｐ）が位置するが、隣接ガス分離板（２）
の空気極側シール面に貼付けたシム（５）にはコーナー
にわたる延長部（５゛）を有し、前記シム拡大部（４′
）との間でマトリックス（Ｍ＞のコーナー部を挟持して
いる。云いかえれば従来構成では空気極周辺があった６
部にもシム（５°）を設けることができる。Each gas separation plate (2) has approximately triangular fluid replacement reservoirs (3) formed at both corners of the fuel electrode side sealing surface, and the shims (4) attached to the sealing surface contain the reservoirs (3).
It has a shim enlarged part (4°) with a notch of the same shape as 3). Air f! is placed on the reservoir (3) via the matrix (M). (P) is located, but the adjacent gas separation plate (2)
The shim (5) attached to the air electrode side sealing surface of the shim has an extension part (5') extending over the corner, and the shim enlarged part (4')
) sandwich the corner part of the matrix (M>).In other words, in the conventional configuration, the area around the air electrode was 6
A shim (5°) can also be provided in the section.
以上の図は説明をわかりやすくするためリザーバー（３
）が上向きになっているが、実際は第４図の要部拡大断
面図に示すように下向きであり、この図ではりザーバー
（３）間を連通する貫通孔（３“）を介して補液時の電
解液流れが矢印で示されている。即ちリザーバー（３）
に補給された電解液は、マトリックス（Ｍ）を介して直
接空気極ｆＰ）のコーナーより順次含浸され、ついで燃
料極（Ｎ）にも浸透する。The above diagram shows the reservoir (3
) is facing upward, but in reality it is facing downward as shown in the enlarged cross-sectional view of the main part in Figure 4. The electrolyte flow in the reservoir (3) is indicated by the arrow.
The electrolytic solution replenished is sequentially impregnated directly from the corners of the air electrode fP) through the matrix (M), and then permeates into the fuel electrode (N).
本発明構成を従来のものと対比して表に示せば次のよう
になる。The structure of the present invention is compared with the conventional structure in a table as follows.
（ト）発明の効果
本発明によれば、セルと共に電池スタ・ンクを構成する
各ガス分離板コーナー部−面に略三角形状のりザーバー
を形設し、このリザーバーと同形の切欠を有するシム拡
大部と、隣接ガス分離板の対向面シムの延長部とにより
、リザーバー外周がマトリックスを介して上下シムでシ
ールされるので、補液性が良好となり、従来のような液
漏れがなく特にガス流通溝の液ぬきが不要となりそれだ
けメンテナンス上有利である。このように本発明では含
浸能力に劣るけれどもシール性・信頼性の向上に貢献す
る。(G) Effects of the Invention According to the present invention, a substantially triangular glue reservoir is formed on the corner surface of each gas separation plate that constitutes the battery tank together with the cells, and a shim having a notch of the same shape as the reservoir is enlarged. The outer periphery of the reservoir is sealed by the upper and lower shims via the matrix by the upper and lower shims of the adjacent gas separation plate, which improves fluid replenishment performance and prevents liquid leakage, especially in the gas distribution grooves. This eliminates the need to remove liquid, which is advantageous in terms of maintenance. As described above, although the present invention is inferior in impregnation ability, it contributes to improved sealing performance and reliability.
第１図は本発明装置の模式的な分解斜面図、第２図は要
部平面図、第３図は第２図Ａ−Ａ線による断面図、第４
図は補給時の電解液流れを示す断面図である。第５図・
第６図は従来装置を示し、第５図は要部平面図、第６図
は第５図Ｂ−Ｂ線による断面図である。
Ｎ：燃料極、ｎ；燃料ガス流通溝、Ｐ：空気極、ｐ；空
気流通溝、２；ガス分離板、３：リザーバー、３゛：貫
通孔、４．５ニ一対のシム、４゜；切欠を有する拡大部
、５′：延長部。Fig. 1 is a schematic exploded perspective view of the device of the present invention, Fig. 2 is a plan view of main parts, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4
The figure is a sectional view showing the electrolyte flow during replenishment. Figure 5・
FIG. 6 shows a conventional device, FIG. 5 is a plan view of the main part, and FIG. 6 is a sectional view taken along the line B--B in FIG. N: Fuel electrode, n: Fuel gas distribution groove, P: Air electrode, p: Air distribution groove, 2: Gas separation plate, 3: Reservoir, 3゛: Through hole, 4.5 pair of shims, 4゜; Enlarged part with notch, 5': extension part.
Claims (1)
せたセルと、表裏各面に夫々互に交錯する方向の燃料ガ
ス及び空気の各流通溝を形設したガス分離板とを交互に
積重して電池スタックが構成され、前記各ガス分離板の
燃料極側シール面のコーナー部に、互に貫通孔で連通す
る略三角形状の補液用リザーバーを形設し、前記リザー
バーと同形状の切欠を有するシムの拡大部と隣接ガス分
離板の空気極側シール面に設けたシムの延長部とにより
、前記リザーバー外周がマトリックスを介して前記一対
のシムでシールされていることを特徴とする燃料電池の
補液装置。(1) Cells in which an electrolyte matrix is interposed between the fuel electrode and the air electrode, and gas separation plates in which fuel gas and air flow grooves are formed in mutually intersecting directions on each of the front and back surfaces are stacked alternately. A battery stack is configured in which a substantially triangular replacement fluid reservoir is formed in the corner of the fuel electrode side sealing surface of each of the gas separation plates and communicates with each other through a through hole. The outer periphery of the reservoir is sealed with the pair of shims via a matrix by an expanded portion of the shim having a notch and an extended portion of the shim provided on the air electrode side sealing surface of the adjacent gas separation plate. Fuel cell fluid replacement device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019573A JPH03225766A (en) | 1990-01-30 | 1990-01-30 | Liquid holding device for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019573A JPH03225766A (en) | 1990-01-30 | 1990-01-30 | Liquid holding device for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03225766A true JPH03225766A (en) | 1991-10-04 |
Family
ID=12003027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019573A Pending JPH03225766A (en) | 1990-01-30 | 1990-01-30 | Liquid holding device for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03225766A (en) |
-
1990
- 1990-01-30 JP JP2019573A patent/JPH03225766A/en active Pending
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