JPH11144746A - Phosphoric acid type fuel cell - Google Patents
Phosphoric acid type fuel cellInfo
- Publication number
- JPH11144746A JPH11144746A JP9308156A JP30815697A JPH11144746A JP H11144746 A JPH11144746 A JP H11144746A JP 9308156 A JP9308156 A JP 9308156A JP 30815697 A JP30815697 A JP 30815697A JP H11144746 A JPH11144746 A JP H11144746A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- phosphoric acid
- fuel
- electrode
- gas flow
- 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
Classifications
-
- 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
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、電解質としてり
ん酸を用い、電気化学反応により電気エネルギを得るり
ん酸型燃料電池に係わり、特にセル内部のガス流路の構
成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphoric acid type fuel cell which uses phosphoric acid as an electrolyte and obtains electric energy by an electrochemical reaction, and more particularly to a gas flow path inside a cell.
【０００２】[0002]
【従来の技術】図２は、従来のりん酸型燃料電池の電池
積層体の基本構成例を示す分解斜視図である。電解質と
してのりん酸を保持した方形平板状のマトリックス層１
１を燃料電極１２と酸化剤電極１３とにより挟持し、燃
料電極１２の外面に燃料ガス通流用の溝を備えた燃料電
極基板１４を、また酸化剤電極１３の外面に酸化剤ガス
通流用の溝を備えた酸化剤電極基板１５を配して単電池
１が構成されている。本構成の単電池１をガス不透過性
材料よりなるセパレータを介して複数個積層してブロッ
クを形成し、このブロックを冷却板３を介装してさらに
積層することにより、電池積層体が構成されている。燃
料電極基板１４の燃料ガス通流用の溝と酸化剤電極基板
１５の酸化剤ガス通流用の溝は、図に見られるように直
交して配されるのが通例であり、電池積層体の各側面に
ガス供給排出用のマニホールドを組み込んで、一方の側
面から相対する側面へと水素を含んだ燃料ガスと酸素を
含んだ酸化剤ガス、例えば空気を通流させて発電が行わ
れる。なお、冷却板３に冷却水を流すことにより発電に
伴う発熱を除去し、電池積層体の温度を一定温度に保持
して発電運転が行われる。2. Description of the Related Art FIG. 2 is an exploded perspective view showing a basic configuration example of a conventional cell stack of a phosphoric acid type fuel cell. Square flat matrix layer 1 holding phosphoric acid as electrolyte
1 is sandwiched between the fuel electrode 12 and the oxidant electrode 13, and a fuel electrode substrate 14 having a groove for fuel gas flow on the outer surface of the fuel electrode 12 and an oxidant gas flow groove on the outer surface of the oxidant electrode 13. The unit cell 1 is constituted by disposing the oxidant electrode substrate 15 having the groove. By forming a block by stacking a plurality of unit cells 1 of this configuration via a separator made of a gas-impermeable material, and further stacking the blocks with a cooling plate 3 interposed therebetween, a battery stack is formed. Have been. The grooves for the flow of the fuel gas of the fuel electrode substrate 14 and the grooves for the flow of the oxidant gas of the oxidant electrode substrate 15 are generally arranged orthogonally as shown in the figure. A power supply / discharge manifold is incorporated in the side surface, and a fuel gas containing hydrogen and an oxidizing gas containing oxygen, such as air, flow from one side to the opposite side to generate power. The power generation operation is performed by flowing the cooling water through the cooling plate 3 to remove the heat generated by the power generation and keeping the temperature of the battery stack at a constant temperature.
【０００３】図３は、図２に用いられている燃料電極基
板１４の燃料ガス通流用流路の構成を簡略化して示す平
面図である。本構成は、高い利用率で使用される燃料ガ
スの流量変動範囲を広くすることのできる、いわゆるリ
ターンフロー方式の流路を備えたものである。リブを形
成することにより燃料電極基板１４の面内には、第１流
路３１、第２流路３２、第３流路３３の三組のガス流路
が設けられており、空気供給側マニホールド２３ならび
に空気排出側マニホールド２４に面する両側端には、そ
れぞれシール部材１４ｃ，１４ｄが配されており、例え
ば耐りん酸性粒子を充填し、その部分にりん酸を蓄えて
液シールする等の方法によりシールされている。本構成
においては、燃料供給側マニホールド２１より供給され
た燃料ガスは、第１流路３１を通って燃料排出側マニホ
ールド２２のリターン部２２ａへと達し、復流して第２
流路３２を通って燃料供給側マニホールド２１へと流
れ、リターン部２１ａで再び復流し、第３流路３３を通
って燃料排出側マニホールド２２の出口より外部へと排
出されることとなる。FIG. 3 is a simplified plan view showing the configuration of the fuel gas flow passage of the fuel electrode substrate 14 used in FIG. This configuration is provided with a so-called return flow type flow path that can widen the fluctuation range of the flow rate of the fuel gas used at a high utilization rate. By forming the ribs, three sets of gas flow paths of a first flow path 31, a second flow path 32, and a third flow path 33 are provided in the plane of the fuel electrode substrate 14, and the air supply side manifold is provided. Sealing members 14c and 14d are disposed at both ends facing the air discharge side manifold 23 and the air discharge side manifold 24. For example, a method of filling phosphoric acid resistant particles, storing phosphoric acid in the portion, and performing liquid sealing is used. Sealed by In this configuration, the fuel gas supplied from the fuel supply side manifold 21 reaches the return portion 22a of the fuel discharge side manifold 22 through the first flow path 31 and returns to the second section.
The fuel flows to the fuel supply side manifold 21 through the flow path 32, returns again at the return portion 21 a, and is discharged to the outside from the outlet of the fuel discharge side manifold 22 through the third flow path 33.
【０００４】[0004]
【発明が解決しようとする課題】上記のように、従来の
りん酸型燃料電池においては、リターンフロー方式の流
路構成を採用し、供給ガスの流量変動許容範囲を広くし
て運転している。一方、りん酸型燃料電池の運転に際し
ては、蒸発したりん酸が反応ガスとともに飛散すること
が知られており、その飛散量は、反応ガスの流量にほぼ
比例し、運転温度の高いほど多量となる。したがって、
図３に表示したごときリターンフロー方式の流路構成の
場合には、第１流路３１を通流するガスは、蒸発したり
ん酸を含んで燃料排出側マニホールド２２のリターン部
２２ａへと達し、第２流路３２を通流するガスは、蒸発
したりん酸を含んで燃料供給側マニホールド２１のリタ
ーン部２１ａへと達することとなる。しかるにリターン
部２２ａおよびリターン部２１ａは、発熱を生じる電池
積層体に比較して温度が低いので、燃料ガスは冷却さ
れ、含まれるりん酸はリターン部２２ａあるいはリター
ン部２１ａの内部に一部凝縮して保持されることとな
り、本リターンフロー方式の流路構成においては、りん
酸の飛散喪失量が大きくなるという難点がある。As described above, in the conventional phosphoric acid type fuel cell, the flow path configuration of the return flow system is adopted, and the operation is performed with the allowable range of the flow rate fluctuation of the supply gas widened. . On the other hand, during the operation of a phosphoric acid fuel cell, it is known that the evaporated phosphoric acid scatters together with the reaction gas, and the amount of the scattered phosphoric acid is almost proportional to the flow rate of the reaction gas. Become. Therefore,
In the case of the return flow type flow path configuration as shown in FIG. 3, the gas flowing through the first flow path 31 contains the evaporated phosphoric acid and reaches the return portion 22a of the fuel discharge side manifold 22, The gas flowing through the second flow path 32 reaches the return portion 21a of the fuel supply side manifold 21 including the evaporated phosphoric acid. However, since the temperature of the return section 22a and the return section 21a is lower than that of the battery stack that generates heat, the fuel gas is cooled, and the phosphoric acid contained is partially condensed in the return section 22a or the inside of the return section 21a. In this return flow type flow path configuration, there is a disadvantage that the amount of scattering loss of phosphoric acid is increased.
【０００５】また、りん酸型燃料電池においては、図２
に示したごとく、近接する２枚の冷却板３の間には複数
の単電池が積層されており、冷却水により冷却される冷
却板３に隣接する単電池は温度が低くなるのに対して、
冷却板３より離れて配置される単電池の温度は相対的に
高くなり、このため、りん酸の蒸発、飛散量も多量とな
る。リターン部２２ａにおいては、複数の単電池１の第
１流路３１を通流してきた燃料ガスが混合され、分割さ
れて第２流路３２へと流れることとなるので、ガス中に
含まれるりん酸のうちリターン部２２ａで凝縮を免れ、
第２流路３２へと送られるりん酸量は、各単電池に均一
化されることとなる。このため、冷却板３より隔たって
配置された、温度が高く、蒸発量の多い単電池において
は、蒸発量に比べて戻り量が少ないので、りん酸量が減
少することとなり、発電特性が低下するという問題点が
ある。In a phosphoric acid fuel cell, FIG.
As shown in, a plurality of cells are stacked between two adjacent cooling plates 3, and the temperature of a cell adjacent to the cooling plate 3 cooled by the cooling water decreases. ,
The temperature of the unit cells arranged farther from the cooling plate 3 becomes relatively high, and therefore, the evaporation and scattering amount of phosphoric acid also becomes large. In the return section 22a, the fuel gas flowing through the first flow path 31 of the plurality of unit cells 1 is mixed and divided and flows to the second flow path 32, so that the phosphorus contained in the gas is mixed. Condensation in the return portion 22a of the acid escaped,
The amount of phosphoric acid sent to the second flow path 32 is made uniform for each unit cell. For this reason, in a unit cell arranged at a distance from the cooling plate 3 and having a high temperature and a large amount of evaporation, the amount of return is small as compared with the amount of evaporation, so that the amount of phosphoric acid is reduced and the power generation characteristics are reduced. There is a problem that.
【０００６】本発明の目的は、リターンフロー方式を用
いるものにあっても、マニホールドへのりん酸の飛散、
凝縮が回避され、各単電池のりん酸量が確保されて長期
にわたり安定して運転できるりん酸型燃料電池を提供す
ることにある。An object of the present invention is to provide a method using a return flow method, in which phosphoric acid scatters into a manifold,
It is an object of the present invention to provide a phosphoric acid fuel cell which can avoid condensation, secure the amount of phosphoric acid in each cell, and operate stably for a long period of time.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明においては、りん酸を保持した方形平板状
のマトリックス層を燃料電極と酸化剤電極により挟持
し、さらにその両外面にガス通流溝を備えた電極基材を
配して単電池を構成し、該単電池を、ガス不透過性材料
よりなるセパレータを介し、さらに適宜冷却板を介装し
て、複数個積層して直方体状の電池積層体を形成し、そ
の側面にそれぞれガスマニホールドを配して、燃料電極
に相対する電極基材のガス通流溝に燃料ガスを、また酸
化剤電極に相対する電極基材のガス通流溝に酸化剤ガス
を通流させて電気化学反応により電気エネルギを得るり
ん酸型燃料電池において、燃料電極に相対する電極基材
と酸化剤電極に相対する電極基材のうち、少なくともい
ずれか一方の電極基材が、前記各ガスを同一面内で複数
回往復させて流すリターンフロー方式のガス流路を有
し、かつ、前記各ガスをガスマニホールドへ排出させる
ことなくガス通流方向を反転させる折り返し部を有する
ように構成することとし、例えば、電極基材に備えられ
たリブとリブとの間に形成される溝によりリターンフロ
ー方式のガス流路を形成し、リブの一部を切除してガス
を復流する複数のガス通流溝の連通部とすることとす
る。In order to achieve the above-mentioned object, in the present invention, a rectangular flat matrix layer holding phosphoric acid is sandwiched between a fuel electrode and an oxidizing electrode, and furthermore, on both outer surfaces thereof. A unit cell is formed by arranging an electrode substrate having a gas flow groove, the unit cell is interposed through a separator made of a gas-impermeable material, and further appropriately interposed with a cooling plate. To form a cell stack in the shape of a rectangular parallelepiped, arranging gas manifolds on the side surfaces thereof, supplying a fuel gas to the gas flow grooves of the electrode substrate facing the fuel electrode, and an electrode substrate facing the oxidizing electrode. In a phosphoric acid type fuel cell in which an oxidizing gas is passed through a gas flow groove to obtain electric energy by an electrochemical reaction, of an electrode substrate facing the fuel electrode and an electrode substrate facing the oxidizing electrode, At least one of the electrode bases However, it has a return flow type gas flow path in which each gas is reciprocated a plurality of times in the same plane, and a folded portion that reverses the gas flow direction without discharging each gas to the gas manifold. For example, a return flow type gas flow path is formed by a groove formed between a rib provided on an electrode substrate and a rib provided on an electrode substrate, and a part of the rib is cut off to remove gas. It is defined as a communicating portion of a plurality of gas flow grooves that return.
【０００８】上記のごとく、リターンフロー方式の流路
構成において、ガス通流溝の連通部をガスマニホールド
と気密を保持して配し、この連通部でガスをリターンさ
せることとすれば、ガスは温度の低いガスマニホールド
を経由することなく、基材内を通流してリターンフロー
を形成するので、従来見られたごときガスマニホールド
へのりん酸の凝縮が回避される。また、各単電池がそれ
ぞれ独立したリターンフロー回路を形成しているので、
冷却板から離れ、温度の高く、りん酸の蒸発、飛散量の
多い単電池にあっても、蒸発、飛散したりん酸は自身の
回路中を通流して戻されるので、従来例のごとき積層位
置によるりん酸量の不足を生じる恐れはない。As described above, in the flow configuration of the return flow system, if the communicating portion of the gas flow groove is disposed so as to be airtight with the gas manifold, and the gas is returned at the communicating portion, the gas can be returned. Since the return flow is formed by flowing through the base material without passing through the low-temperature gas manifold, the condensation of phosphoric acid in the gas manifold as conventionally observed is avoided. In addition, since each cell forms an independent return flow circuit,
Even in a unit cell that is away from the cooling plate and has a high temperature and a large amount of phosphoric acid evaporates and scatters, the evaporated and scattered phosphoric acid flows back into its own circuit and returns. There is no danger that the amount of phosphoric acid will be insufficient.
【０００９】[0009]
【発明の実施の形態】図１は、本発明のりん酸型燃料電
池の実施例の燃料ガス通流用流路の構成を簡略化して示
す平面図である。本構成においても、従来例と同様に、
第１流路３１、第２流路３２、および第３流路３３を連
結してなるリターンフロー方式のガス通路が用いられて
いる。FIG. 1 is a plan view schematically showing the structure of a fuel gas flow passage in an embodiment of a phosphoric acid fuel cell according to the present invention. In this configuration, as in the conventional example,
A return flow type gas passage formed by connecting the first flow path 31, the second flow path 32, and the third flow path 33 is used.
【００１０】図３に示した従来の構成においては、第１
流路３１と第２流路３２を連通する折り返し部、および
第２流路３２と第３流路３３を連通する折り返し部が、
それぞれ燃料排出側マニホールド２２および燃料供給側
マニホールド２１に配されていたのに対して、本実施例
では、これらの折り返し部を、シール部材によってマニ
ホールドと気密に隔てられた燃料電極基板１４の面内に
形成している点が特徴である。すなわち、本実施例で
は、燃料電極基板１４の空気供給側マニホールド２３に
相対する側端および燃料排出側マニホールド２２の第１
流路３１と第２流路３２の部分に相対する側端にシール
部材１４ｂが、また、空気排出側マニホールド２４に相
対する側端および燃料供給側マニホールド２１の第２流
路３２と第３流路３３の部分に相対する側端にシール部
材１４ａが配され、さらに、燃料排出側マニホールド２
２とシール部材１４ｂにより隔てられた部分にリブを備
えないリブ切除部４１を形成して、第１流路３１と第２
流路３２を連通する折り返し部とし、燃料供給側マニホ
ールド２１とシール部材１４ａにより隔てられた部分に
リブを備えないリブ切除部４２を形成して、第２流路３
２と第３流路３３を連通する折り返し部としている。In the conventional configuration shown in FIG.
A folded portion that communicates the flow path 31 with the second flow path 32 and a folded part that communicates the second flow path 32 with the third flow path 33 include:
In the present embodiment, these folded portions are formed in the plane of the fuel electrode substrate 14 which is air-tightly separated from the manifold by a seal member, whereas the fuel discharge side manifold 22 and the fuel supply side manifold 21 are arranged respectively. The feature is that it is formed in. That is, in the present embodiment, the side end of the fuel electrode substrate 14 facing the air supply side manifold 23 and the first end of the fuel discharge side manifold 22
A seal member 14b is provided at a side end of the flow passage 31 and the second flow passage 32, and a second end of the fuel supply side manifold 21 and a third flow passage of the fuel supply side manifold 21. A seal member 14a is disposed at a side end opposite to the portion of the passage 33, and furthermore, a fuel discharge side manifold 2 is provided.
A rib cut portion 41 having no rib is formed in a portion separated by the seal member 14b from the second flow path 2 so that the first flow path 31 and the second flow path
A rib cut portion 42 having no rib is formed at a portion separated by the fuel supply side manifold 21 and the seal member 14 a as a folded portion that communicates the flow channel 32, and the second flow channel 3 is formed.
The second and third flow paths 33 are turned back to communicate with each other.
【００１１】すなわち、本構成においては、燃料供給側
マニホールド２１より供給された燃料ガスは、第１流路
３１を流れてリブ切除部４１へと達し、折り返して第２
流路３２を流れ、リブ切除部４２へと達し、再び折り返
して第３流路３３を流れ、燃料排出側マニホールド２２
より外部へ排出されることとなり、中途でマニホールド
部へ入ることなく、一貫して燃料電極基板の面内を流れ
ることとなる。したがって、発電運転に伴って燃料ガス
中へりん酸が蒸発、飛散しても、従来のごとくマニホー
ルド部へ凝縮することなく自身の回路内に止まり、回収
される。また、各単電池がそれぞれ独立したリターンフ
ロー回路を形成しているので、冷却板から離れた位置に
積層された、りん酸の蒸発、飛散量の多い単電池にあっ
ても、蒸発、飛散したりん酸は自身の回路中を通流し、
回収されるので、従来例のごとき積層位置によるりん酸
量の不足を生じる恐れはない。That is, in the present configuration, the fuel gas supplied from the fuel supply side manifold 21 flows through the first flow path 31 and reaches the rib cutout 41, where it is turned back to the second position.
After flowing through the flow path 32, reaching the rib cutout section 42, turning back again and flowing through the third flow path 33, the fuel discharge side manifold 22
The gas is further discharged to the outside, and flows consistently in the plane of the fuel electrode substrate without entering the manifold partway. Therefore, even if the phosphoric acid evaporates and scatters in the fuel gas during the power generation operation, the phosphoric acid stops in its own circuit and is collected without being condensed to the manifold portion as in the related art. In addition, since each unit cell forms an independent return flow circuit, even a unit cell with a large amount of phosphoric acid evaporated and scattered, which was stacked at a position away from the cooling plate, was evaporated and scattered. Phosphoric acid flows through its own circuit,
Since it is recovered, there is no possibility that the amount of phosphoric acid will be insufficient due to the lamination position as in the conventional example.
【００１２】なお、上記の実施例では、折り返し部を２
ヶ所備えたリターンフロー回路を備える構成としている
が、折り返し部は２ヶ所に限るものではなく、より多数
の折り返し部を持つものでも良い。また、上記の実施例
では、燃料電極基板に設ける燃料ガス流路を上記のごと
く構成するものとしているが、酸化剤電極基板に設ける
酸化剤ガス流路を上記のごとく構成するものとしても同
様の効果が得られることは例示するまでもなく明らかで
ある。In the above-described embodiment, the folded portion is formed by two.
Although the return flow circuit is provided at two locations, the number of return portions is not limited to two, and a return flow circuit having a larger number of return portions may be used. Further, in the above embodiment, the fuel gas flow channel provided on the fuel electrode substrate is configured as described above. However, the same applies when the oxidant gas flow channel provided on the oxidant electrode substrate is configured as described above. It is obvious that the effect can be obtained without need of illustration.
【００１３】[0013]
【発明の効果】上述のごとく、本発明によれば、りん酸
を保持した方形平板状のマトリックス層を燃料電極と酸
化剤電極により挟持し、さらにその両外面にガス通流溝
を備えた電極基材を配して単電池を構成し、該単電池
を、ガス不透過性材料よりなるセパレータを介し、さら
に適宜冷却板を介装して、複数個積層して直方体状の電
池積層体を形成し、その側面にそれぞれガスマニホール
ドを配して、燃料電極に相対する電極基材のガス通流溝
に燃料ガスを、また酸化剤電極に相対する電極基材のガ
ス通流溝に酸化剤ガスを通流させて電気化学反応により
電気エネルギを得るりん酸型燃料電池において、燃料電
極に相対する電極基材と酸化剤電極に相対する電極基材
のうち、少なくともいずれか一方の電極基材が、前記各
ガスを同一面内で複数回往復させて流すリターンフロー
方式のガス流路を有し、かつ、前記各ガスをガスマニホ
ールドへ排出させることなくガス通流方向を反転させる
折り返し部を有するよう構成することとし、例えば、電
極基材に備えられたリブとリブとの間に形成される溝に
よりリターンフロー方式のガス流路を形成し、リブの一
部を切除してガスを復流する複数のガス通流溝の連通部
とすることとしたので、リターンフロー方式を用いるも
のにあっても、マニホールドへのりん酸の飛散、凝縮が
回避され、各単電池のりん酸量が確保されて長期にわた
り安定して運転できるりん酸型燃料電池が得られること
となった。As described above, according to the present invention, according to the present invention, a rectangular flat matrix layer holding phosphoric acid is sandwiched between a fuel electrode and an oxidant electrode, and further, an electrode provided with gas flow grooves on both outer surfaces thereof. A unit cell is formed by arranging a base material, the unit cell is interposed via a separator made of a gas-impermeable material, and a cooling plate is further interposed appropriately, and a plurality of units are stacked to form a rectangular parallelepiped battery stack. A gas manifold is disposed on each side of the fuel cell, and a fuel gas is supplied to a gas flow groove of the electrode substrate facing the fuel electrode, and an oxidant is supplied to a gas flow groove of the electrode substrate facing the oxidant electrode. In a phosphoric acid fuel cell in which gas is passed to obtain electric energy by an electrochemical reaction, at least one of an electrode substrate facing the fuel electrode and an electrode substrate facing the oxidizing electrode. However, each of the above gases is It has a return flow type gas flow path which is reciprocated and flows, and has a folded portion for reversing the gas flow direction without discharging each gas to the gas manifold, for example, an electrode base A communication part of a plurality of gas flow grooves for forming a return flow gas flow path by means of a groove formed between ribs provided on the material and cutting off a part of the rib to return gas. Therefore, even if the return flow method is used, the phosphoric acid is prevented from scattering and condensing into the manifold, the phosphoric acid amount of each cell is secured, and the phosphoric acid can be operated stably for a long period of time. An acid fuel cell was obtained.
【図１】本発明のりん酸型燃料電池の実施例の燃料ガス
通流用流路の構成を簡略化して示す平面図FIG. 1 is a plan view schematically showing the configuration of a fuel gas flow passage in an embodiment of a phosphoric acid fuel cell according to the present invention.
【図２】従来のりん酸型燃料電池の電池積層体の基本構
成例を示す分解斜視図FIG. 2 is an exploded perspective view showing a basic configuration example of a conventional cell stack of a phosphoric acid fuel cell.
【図３】図２の従来例に用いられている燃料電極基板の
燃料ガス通流用流路の構成を簡略化して示す平面図FIG. 3 is a plan view showing a simplified configuration of a fuel gas flow passage of a fuel electrode substrate used in the conventional example of FIG. 2;
１４ 燃料電極基板 １４ａ シール部材 １４ｂ シール部材 ２１ 燃料供給側マニホールド ２２ 燃料排出側マニホールド ２３ 空気供給側マニホールド ２４ 空気排出側マニホールド ３１ 第１流路 ３２ 第２流路 ３３ 第３流路 ４１ リブ切除部 ４２ リブ切除部 Reference Signs List 14 fuel electrode substrate 14a seal member 14b seal member 21 fuel supply-side manifold 22 fuel discharge-side manifold 23 air supply-side manifold 24 air discharge-side manifold 31 first flow path 32 second flow path 33 third flow path 41 rib cutting section 42 Rib cutout
Claims (2)
ス層を燃料電極と酸化剤電極により挟持し、さらにその
両外面にガス通流溝を備えた電極基材を配して単電池を
構成し、該単電池を、ガス不透過性材料よりなるセパレ
ータを介し、さらに適宜冷却板を介装して、複数個積層
して直方体状の電池積層体を形成し、その側面にそれぞ
れガスマニホールドを配して、燃料電極に相対する電極
基材のガス通流溝に燃料ガスを、また酸化剤電極に相対
する電極基材のガス通流溝に酸化剤ガスを通流させて電
気化学反応により電気エネルギを得るりん酸型燃料電池
において、 前記の燃料電極に相対する電極基材と酸化剤電極に相対
する電極基材のうち、少なくともいずれか一方の電極基
材が、前記各ガスを同一面内で複数回往復させて流すリ
ターンフロー方式のガス流路を有し、かつ、前記各ガス
をガスマニホールドへ排出させることなくガス通流方向
を反転させる折り返し部を有することを特徴とするりん
酸型燃料電池。1. A unit cell comprising a rectangular flat matrix layer holding phosphoric acid sandwiched between a fuel electrode and an oxidant electrode, and an electrode substrate provided with gas flow grooves on both outer surfaces thereof. Then, the unit cell, via a separator made of a gas-impermeable material, further interposed a cooling plate as appropriate, to form a stack of a plurality of rectangular parallelepiped battery stack, each side of the gas manifold on its side The fuel gas is passed through the gas flow groove of the electrode base material facing the fuel electrode, and the oxidant gas is flowed through the gas flow groove of the electrode base material facing the oxidant electrode. In a phosphoric acid fuel cell that obtains electric energy, at least one of the electrode base material facing the fuel electrode and the electrode base material facing the oxidant electrode has the same gas on the same surface. Return to reciprocate multiple times within A phosphoric acid fuel cell comprising: a flow type gas flow path; and a folded portion for reversing a gas flow direction without discharging each of the gases to a gas manifold.
て、前記のリターンフロー方式のガス流路が、電極基材
に備えられたリブとリブとの間に形成される溝を有し、
前記折り返し部が、リブの一部を切除して構成されてい
ることを特徴とするりん酸型燃料電池。2. The phosphoric acid fuel cell according to claim 1, wherein the return flow type gas flow path has a groove formed between ribs provided on an electrode substrate. ,
The phosphoric acid type fuel cell, wherein the folded portion is formed by cutting a part of a rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9308156A JPH11144746A (en) | 1997-11-11 | 1997-11-11 | Phosphoric acid type fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9308156A JPH11144746A (en) | 1997-11-11 | 1997-11-11 | Phosphoric acid type fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11144746A true JPH11144746A (en) | 1999-05-28 |
Family
ID=17977580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9308156A Pending JPH11144746A (en) | 1997-11-11 | 1997-11-11 | Phosphoric acid type fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11144746A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000294261A (en) * | 1999-04-09 | 2000-10-20 | Honda Motor Co Ltd | Fuel cell stack |
| JP2001052723A (en) * | 1999-08-13 | 2001-02-23 | Honda Motor Co Ltd | Fuel cell stack |
| KR20040000561A (en) * | 2002-06-21 | 2004-01-07 | 엘지전자 주식회사 | Fuel supply structure for fuel cell stack |
| KR100477201B1 (en) * | 2002-02-25 | 2005-03-21 | 한국과학기술연구원 | Bipolar Plate for Fuel Cell comprising Zigzag Type Gas Flow Channel |
| KR100820519B1 (en) | 2007-03-23 | 2008-04-08 | 지에스칼텍스 주식회사 | Fuel cell stack cooling system |
-
1997
- 1997-11-11 JP JP9308156A patent/JPH11144746A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000294261A (en) * | 1999-04-09 | 2000-10-20 | Honda Motor Co Ltd | Fuel cell stack |
| JP4523089B2 (en) * | 1999-04-09 | 2010-08-11 | 本田技研工業株式会社 | Fuel cell stack |
| JP2001052723A (en) * | 1999-08-13 | 2001-02-23 | Honda Motor Co Ltd | Fuel cell stack |
| JP4590047B2 (en) * | 1999-08-13 | 2010-12-01 | 本田技研工業株式会社 | Fuel cell stack |
| KR100477201B1 (en) * | 2002-02-25 | 2005-03-21 | 한국과학기술연구원 | Bipolar Plate for Fuel Cell comprising Zigzag Type Gas Flow Channel |
| KR20040000561A (en) * | 2002-06-21 | 2004-01-07 | 엘지전자 주식회사 | Fuel supply structure for fuel cell stack |
| KR100820519B1 (en) | 2007-03-23 | 2008-04-08 | 지에스칼텍스 주식회사 | Fuel cell stack cooling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6858338B2 (en) | Solid polymer electrolyte fuel cell assembly, fuel cell stack, and method of supplying reaction gas in fuel cell | |
| KR100549683B1 (en) | Solid polymer electrolyte fuel cell assembly, fuel cell stack, and method of supplying reaction gas in fuel cell | |
| CA2578009C (en) | Fuel cell having buffer with inclined surface | |
| US9123946B2 (en) | Fuel cell stack | |
| US11831047B2 (en) | Membrane humidifier for fuel cell, and fuel cell system comprising same | |
| JP5302263B2 (en) | Fuel cell | |
| JPH0238377Y2 (en) | ||
| JPH11144746A (en) | Phosphoric acid type fuel cell | |
| JPS63119166A (en) | Fuel battery | |
| US20050008921A1 (en) | Fluid flow plate for fuel cell | |
| US9634340B2 (en) | Plate-style water vapor transfer unit with integral headers | |
| KR102140468B1 (en) | A fuel cell with improving thermal distribution inside stack | |
| JP2007234405A (en) | Fuel cell stack | |
| EP4235880A1 (en) | Fuel cell membrane humidifier | |
| JPH10223240A (en) | Fuel cell | |
| JPH033958Y2 (en) | ||
| JP2659951B2 (en) | Fuel cell stack | |
| JPH06105625B2 (en) | Molten carbonate fuel cell | |
| JP2024514917A (en) | fuel cell membrane humidifier | |
| KR20220168422A (en) | Manifolds for fuel cell and fuel cell comprising the same | |
| KR20220035805A (en) | Fuel cell membrane humidifier and fuel cell system comprising it | |
| JPH02253563A (en) | Molten carbonate fuel cell | |
| JPH02253564A (en) | Molten carbonate fuel cell | |
| JPH0646574B2 (en) | Fuel cell | |
| JP2004241273A (en) | Fuel cell and its operating method |