JPH10106601A - Fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen dispersion of supply quantity of oxygen containing gas to each oxygen containing gas flow path or supply quantity of fuel gas to each fuel gas flow path with a simple constitution. SOLUTION: In a fuel cell in which plural cells C' are arranged in parallel in their laminated state, a cell laminator NC is constituted, an opening o of an oxygen containing gas flow path s and an opening o of a fuel gas flow path f are provided at an outer circumference of the cell laminator NC, gas communicating paths F and S that communicates with the opening of the oxygen containing gas flow path s or the opening o of the fuel gas flow path f are provided, respectively, a gas passage adjuster P integrally formed so as to be provided with a passage adjustment part p for adjusting gas passage corresponding each operating o is additionally provided so as to equalize supply quantity of gas to be supplied to each of flow paths f and s through each opening o from the gas communicating paths F and S at an outer circumference part at which respective openings o of the oxygen containing gas flow path s and of the fuel gas flow path f are disposed, respectively, in the cell laminator NC.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fuel cell having an oxygen electrode on one side of an electrolyte layer and a fuel electrode on the other side, wherein an oxygen-containing gas is provided on a side facing the oxygen electrode. A cell stack is provided side by side in a stacked state with a flow path, and a fuel gas flow path on the side facing the fuel electrode, and a cell stack is formed. A fuel cell provided with an opening of a passage and an opening of the fuel gas passage, and a gas passage communicating with each of the openings of the oxygen-containing gas passage or the openings of the fuel gas passage. About.

[0002]

2. Description of the Related Art In such a fuel cell, an oxygen-containing gas is supplied from a predetermined supply point in a gas passage so as to flow through the gas passage.
Distributing and supplying the oxygen-containing gas flow path from each opening of the oxygen-containing gas flow path to each of the oxygen-containing gas flow paths, or supplying the fuel gas from a predetermined supply point in the gas passage, causing the fuel gas to flow through the gas passage, Gas is distributed and supplied to each of the fuel gas flow paths from each of the openings of the fuel gas flow path.

[0003]

By the way, the dynamic pressure of the gas flowing through the gas passage varies depending on the position with respect to the supply point in the gas passage. The opening area and the opening area of each opening of the fuel gas flow path vary. Therefore, conventionally, the supply amount of the oxygen-containing gas to each oxygen-containing gas passage or the variation in the supply amount of the fuel gas to each fuel gas passage has been large.

Incidentally, in order to reduce the variation in the gas supply amount to each flow path, it is conceivable to separately provide a flow rate limiting member for limiting the flow rate of the gas flowing into each opening (for example, the applicant of the present invention). Proposed Japanese Patent Application No. 7-
252218). However, in this case, although the variation in the gas supply amount to each flow path is reduced, the flow rate limiting member needs to be provided separately for each opening, so that the configuration becomes complicated and there is still room for improvement. there were.

The present invention has been made in view of the above circumstances, and has as its object the purpose of providing a simple structure with a supply amount of an oxygen-containing gas to each oxygen-containing gas passage or a fuel supply to each fuel gas passage. An object of the present invention is to reduce the variation in gas supply amount.

[0006]

According to the first aspect of the present invention, the passage adjusting section adjusts the supply amount of gas supplied to each flow path through each opening so as to be uniform. You. In addition, the gas passage adjuster adjusts gas passage corresponding to each of the openings so as to equalize the amount of gas supplied from the gas passage to each of the flow paths through each of the openings. Since the gas passage adjusting member is integrally formed so as to include the portion, the gas passage adjusting member can be easily attached to the outer peripheral portion of the cell stack. Therefore, with a simple configuration, it is possible to reduce the variation in the supply amount of the oxygen-containing gas to each oxygen-containing gas passage or the supply amount of the fuel gas to each fuel gas passage.

According to a second aspect of the present invention, the gas passage adjusting member is formed of a metal plate having a plurality of holes functioning as the passage adjusting portion in a dispersed state in a plane direction. Have been. That is, even if the gas passage adjusting member is integrally formed so as to include the passage adjusting portion for adjusting the gas passage corresponding to each of the openings, the gas passage adjusting member is simply formed on a metal plate. This is an extremely simple configuration in which a plurality of holes functioning as an adjustment unit are formed in a dispersed state in the plane direction. In addition, the metal plate is inexpensive and easy to form holes, as compared with ceramic members and the like. Therefore, the gas passage adjusting body has a simple configuration and can be formed at low cost.
The cost for carrying out the present invention can be further reduced.

According to a third aspect of the present invention, the gas passage forming member that defines the gas passage is formed of the metal plate so as to define the gas passage using the metal plate. And is formed of a metal casing member connected to the plate-like member. That is, since the gas passage forming member is formed of a metal casing member, it is inexpensive as compared with, for example, a case of forming a ceramic member or the like. In addition, since the metal casing member is connected to the metal plate, that is, the metal members can be connected to each other, for example, compared to the case where the metal member and the ceramic member are connected. Then, processing is easy. Therefore, since the gas passage can be defined by a material that is inexpensive and easy to process,
It has become possible to further reduce the cost of the fuel cell.

According to a fourth aspect of the present invention, the flow path forming member is provided on one of the surface of the cell facing the oxygen electrode and the surface facing the fuel electrode. A cell with a flow path forming member is formed by partitioning and forming a flow path or an internal flow path functioning as one of the fuel gas flow paths. The cell with a flow path forming member is formed in a rectangular plate shape, and one pair of opposed end faces is an open end face having an opening of the intra-cell flow path, and the other opposed pair of end faces is , The intra-cell flow path is configured to be a closed closed end face. Then, a plurality of such cells with a flow path forming member are juxtaposed in a stacked state while being held at a distance from each other by a pair of spacing members, thereby forming a cell stack. Then, in the cell stack, any one of the fuel gas flow path or the oxygen-containing gas flow path is partitioned between the cells with flow path forming members adjacent to each other in the cell stacking direction and the flow path in the cell. An inter-cell flow path functioning as one of them can be formed. The inter-cell flow path is configured to be closed by the pair of spacing members on the pair of open end faces of the cell with the flow path forming member, and to have an opening on the pair of closed end faces. ing. Each of the cells between the flow path forming members adjacent in the cell stacking direction is filled with a flexible conductive material formed so as to allow the flow of gas, so that the gas can flow through the flow path between the cells. And the adjacent cells with flow path forming members are connected to each other in a conductive state.

That is, the flow path forming member as described above is
One cell is attached to each of the cells to form a cell with a flow path forming member, and a plurality of such cells with a flow path forming member are stacked in a state where the distance is held by a pair of distance holding members. Simply by juxtaposing, it is possible to provide each cell with an oxygen-containing gas flow path and a fuel gas flow path. Therefore, a stacked structure in which a plurality of cells are juxtaposed in a stacked state in a state where an oxygen-containing gas flow path and a fuel gas flow path are provided for each cell can be extremely simplified.

Further, even if the temperature rises with the operation of the fuel cell and each component constituting the fuel cell expands or warps, the flexibility of the flexible conductive material increases the flexibility of the flexible conductive material. And a cell with a flow path forming member on both sides thereof (one side is a flow path forming member, the other side is a fuel electrode or an oxygen electrode of the cell), and a good contact state is maintained between the adjacent flow paths. It is possible to always keep the electrical connection state between the cells with forming members good, and it is possible to suppress power loss. Further, even if each component constituting the fuel cell expands or warps, stress can be suppressed from being generated due to the flexibility of the flexible conductive material, so that reliability can be improved. .

In the cell laminate having the above-described structure, the opening area of the opening of the inter-cell flow path is larger than the opening area of the opening of the intra-cell flow path, and the flow resistance of the inter-cell flow path is reduced. Is smaller than the flow resistance of the flow path in the cell. Therefore, the variation of the gas supply amount to each inter-cell flow path is
This is larger than the variation in the gas supply amount to each cell flow path. Therefore, as described above, in a fuel cell employing a laminated structure that is excellent both in cost and performance, in particular, the gas passage adjusting body, in the cell laminated body, a pair of the inter-cell flow path The provision of the oxygen-containing gas to each oxygen-containing gas flow path while minimizing the cost for carrying out the present invention by being attached to the outer peripheral portion where each of the openings is disposed. Any variation in the amount and the supply amount of the fuel gas to each fuel gas passage can be kept within an allowable range.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 7,
A cell C 'of a rectangular flat fuel cell having a solid electrolyte layer 1 having an oxygen electrode 2 on one surface and a fuel electrode 3 on the other surface.
Are provided side by side in a stacked state in a state where an oxygen-containing gas flow path s is provided on the side facing the oxygen electrode 2 and a fuel gas flow path f is provided on the side facing the fuel electrode 3. Is configured. An opening o of the oxygen-containing gas flow path s and an opening o of the fuel gas flow path f are provided on the outer periphery of the cell stack NC. An oxygen-side gas passage S communicating with each opening o of the oxygen-containing gas passage s and a fuel-side gas passage F communicating with each opening o of the fuel gas passage f are provided.

The fuel gas flow path f in the cell stack NC
In order to equalize the supply amount of the fuel gas supplied from the fuel-side gas passage F to each fuel gas flow path f through each opening o on the outer peripheral portion where each of the openings o is arranged, each of the openings fo A gas passage adjusting member P integrally formed so as to have a passage adjusting portion p for adjusting gas passage corresponding to the above is provided.

First, a cell C 'of a fuel cell and a cell C with a rectangular plate-like separator corresponding to a cell with a flow path forming member will be described with reference to FIGS. On a surface of the solid electrolyte layer 1 having a rectangular plate-like shape, a pair of opposed side edges of the solid electrolyte layer 1 are formed with an electrolyte layer exposed portion 1a over the entire length of the solid electrolyte layer 1. An oxygen electrode 2 is integrally provided, and a film-shaped or plate-shaped fuel electrode 3 is integrally provided on the other surface over the entire surface or almost the entire surface, and an electromotive force is generated from the oxygen electrode 2 and the fuel electrode 3. To form a rectangular three-layer plate-shaped cell C '.

On the side of the cell C ′ facing the oxygen electrode 2, a conductive separator 4 as a flow path forming member is provided so as to define a flow path x in the cell, thereby forming a rectangular plate-like separator-equipped cell. C is formed. To further explain,
The conductive separator 4 includes a plate-shaped portion 4a and the plate-shaped portion 4a.
, And a plurality of ridges 4c located between the pair of band-shaped protrusions 4b.
And are integrally formed of a conductive material. By attaching the pair of strip-shaped protrusions 4b to each of the electrolyte layer exposed portions 1a in a state where the conductive separator 4 is in contact with the oxygen electrode 2 in each of the plurality of ridges 4c, the cell C with separator is formed. It is formed.

Then, the oxygen electrode 2 and the conductive separator 4 are connected in a conductive state, and a cell opened between the oxygen electrode 2 and the conductive separator 4 at one pair of opposite end faces of the cell C with separator. An inner channel x is formed. That is, in the cell C with separator, the pair of end faces facing each other is formed by the conductive separator 4.
It is configured such that it becomes an open end face having an opening o of the intracell flow path x, and a pair of opposite end faces becomes a closed end face in which the intracell flow path x is closed. The in-cell flow path x faces the oxygen electrode 2 and functions as an oxygen-containing gas flow path s through which the oxygen-containing gas flows. In the following description, in the cell C with separator, the edge where the oxygen-containing gas flow path s is open is the open edge, the end face where the oxygen-containing gas flow path s is open is the open end face, and the oxygen-containing gas flow The end faces where the path s is closed are abbreviated as closed end faces.

The solid electrolyte layer 1 is made of tetragonal or cubic ZrO _{2 in} which about 3 to 10 mol% of Yt is dissolved, the oxygen electrode 2 is made of LaMnO ₃ , and the fuel electrode 3 is made of Ni.
And a cermet of ZrO ₂ . The conductive separator 4 is made of LaCrO ₃ having excellent oxidation resistance and reduction resistance.

Next, based on FIG. 2 to FIG. 7, in a state where a plurality of cells C with separators are electrically connected in series,
A stacked structure for forming the cell stack NC in a stacked state will be described. In order to form a plurality of cells C with separators between adjacent cells C with separators, and to form an inter-cell flow path y functioning as a fuel gas flow path f, an end on the pair of open end faces between adjacent cells C with separators. The cell stack NC is formed by juxtaposing them in a stacked state in a state where they are held at an interval from each other by a pair of interval holding members 9 provided separately from each other.

Then, both sides between the cells C with separators adjacent in the cell stacking direction are partitioned by a pair of spacing members 9, so that an inter-cell flow path y is formed between the cells C with separators adjacent in the cell stacking direction. It is formed. The fuel gas flow path f is configured to be closed by a pair of spacing members 9 on the pair of open end faces of the cell C with separator and to have the opening o on the pair of closed end faces of the cell C with separator. . The flexible conductive material 8 is filled between adjacent cells C with separators, that is, the intercell flow passage y, so that adjacent cells C with separators are connected to each other in a conductive state.

The inter-cell flow path y faces the fuel electrode 3 and functions as a fuel gas flow path f through which fuel gas containing hydrogen gas flows.

The cell stack NC formed as described above is
It has a substantially rectangular parallelepiped shape, and among the four side surface portions in the rectangular parallelepiped shape, an opening o of the oxygen-containing gas flow path s is disposed on one pair of facing side surfaces, and the other facing pair of side surfaces is provided on the other facing side surface. The openings o of the fuel gas flow path f are respectively arranged.

Next, a configuration for extracting electric power from the cell stack NC will be described with reference to FIGS. A conductive felt material 13 is applied to each of the separator-attached cells C at both ends in the cell stacking direction in the cell stack NC.
Are provided in a state where they are in contact with each other, and furthermore, a current collector 15 supported by the current collector support member 14 is provided so as to be in contact with the conductive felt material 13, and the power is extracted by the current collector 15. It is.

In addition, the current collector supporting member 14 supporting the current collector 15 is connected to the separator C in the same manner as the cell C with separator.
The cell stack NC is held by a pair of spacing members 9.

Next, based on FIG. 2 to FIG. 7, the oxygen-side gas passage S communicating with the opening o of the oxygen-containing gas passage s and the opening o of the fuel gas passage f communicate with each other. The fuel gas passage F will be described. The spacing member 9 is formed in a plate shape having a length longer than the length of the opening edge of the cell C with separator. Then, each of the pair of interval holding members 9 is disposed between the cells C with separator along the opening edge of the cell C with separator.
By arranging both ends so as to protrude from the closed end face of the cells with separators C, the distance between the cells with separators C is maintained.

Furthermore, by connecting the frame forming member W to each of the spacing members 9, the oxygen-side gas passages S are connected in series in the cell stacking direction and communicate with the respective openings o of the oxygen-containing gas passage s. Are formed. Then, one of the two oxygen-side gas passages S is used as a supply oxygen-side gas passage Si for supplying the oxygen-containing gas to each of the oxygen-containing gas passages s, and the other is supplied with the oxygen-containing gas from each of the oxygen-containing gas passages s. It is designed to be used as a discharge oxygen side gas passage Se to be discharged.

The frame forming member W will be described. The frame forming member W includes a pair of first square rods 10 that are respectively connected to protruding ends 9a protruding from the closed end surface of the cell C with separator in the spacing member 9, and a pair of first square rods 10 respectively. And a second square rod-shaped body 11 connecting the ends. First square rod 10 and second square rod 11
In each case, the thickness in the cell stacking direction is the same as the thickness of the cell C with separator plus the thickness of the spacing member 9. Then, in order to fit the protruding end 9 a of the spacing member 9 into one end of each of the first square rod-shaped bodies 10,
A recess 10 a having the same depth as the thickness of the spacing member 9 is formed. Therefore, in the first square rod-shaped body 10, the recess 10
The thickness of the thin portion left by forming a becomes the same as the thickness of the cell C with separator. First square bar 1
A recess 10b is formed at each other end, and a recess 10b of the first square bar 10 is formed at each end of the second square bar 11.
A concave portion 11a for fitting b is formed. When connecting the first square rod 10 to the protruding end 9a of the spacing member 9, the side of the first square rod 10 is connected to the cell C with separator.
The opening o of the oxygen-containing gas flow path s and the opening o of the fuel gas flow path f are thereby hermetically sealed.

At one end of the cell stack NC in the cell stacking direction, a cover member 18 is provided so as to close the opening formed by the spacing member 9 and the frame forming member W, and the supply oxygen side is closed. One end of each of the gas passage Si and the discharge oxygen side gas passage Se is closed. Further, a pair of frame members 17 having the same frame shape as the frame formed by the spacing member 9 and the frame forming member W is provided at the other end of the cell stack NC in the cell stacking direction.

The fuel gas flow path f in the cell stack NC
A gas passage adjusting member P is attached to one of a pair of side surfaces on which the openings o are arranged. The gas passage adjusting body P is constituted by a metal plate-like body 5 provided with a plurality of holes 5h functioning as a passage adjusting unit p in a plane direction in a dispersed state. Then, each side portion of the plate-shaped body 5 is bonded to each side wall surface formed by the first square rod-shaped body 10 in a laminated state with a sealing material 6 to thereby form the plate-shaped body 5.
Is provided on the side surface of the cell stack NC. The plurality of holes 5h provided in the plate-like body 5 are formed by connecting the plate-like body 5 to the cell laminate NC.
In the state attached to the side surface portion, the plate 5 is formed so as to be dispersed in the plane direction so that the plurality of holes 5h are arranged in opposition to the openings o of the fuel gas flow path f.

The gas passage forming member M which defines the fuel gas passage F is connected to the metal plate 5 so as to define the fuel gas passage F using the metal plate 5. And a metal casing member 7. The casing member 7 has a shape having three side surfaces and an upper surface portion, and the casing member 7 is provided with a plate-like body 5 inside thereof.
In a state where all the holes 5h are located, the peripheral portion is connected to the metal plate-like body 5. The plate-like body 5 and the casing member 7 define a fuel-side gas passage F that communicates with each of the openings o of the fuel gas passage f. f It is used as a supply fuel side gas passage Fi for supplying a fuel gas to each of them. The supply fuel side gas passage Fi is closed at the same end as the supply oxygen side gas passage Si and the discharge oxygen side gas passage Se closed, and the supply oxygen side gas passage Si and the discharge The oxygen side gas passage Se for use is open at the same end as the open end.

Flexible conductive material 8 and conductive felt material 13
Has air permeability and is made of a felt material of Ni. Each of the spacing member 9, the first rectangular rod-shaped body 10, and the second rectangular rod-shaped body 11 is made of ceramic having electrical insulation and excellent heat resistance, oxidation resistance, and reduction resistance. The sealing material 6 is made of a glass material or a ceramic material as a main component, has an adhesive action, and has airtightness.

Next, the overall structure of the fuel cell will be described with reference to FIGS. The cell stack NC formed as described above is placed on the base with the end where the supply oxygen-side gas passage Si, the discharge oxygen-side gas passage Se, and the supply fuel-side gas passage Fi are opened downward. It is placed on the table 16.

Further, in a state where the cell laminate NC is installed,
The bottomed rectangular cylindrical body 19 is placed on the base 16. That is, the base 16 and the bottomed rectangular cylindrical body 19 form a box-shaped body B, and the cell laminate NC is provided inside the box-shaped body B.
One opening o of each fuel gas flow path f of each cell C with separator is in a state of facing the inside of the box-shaped body B. Then, the internal space of the box-shaped body B is defined by the opening o of the fuel gas flow path f.
The fuel gas passage F communicates with each of the fuel gas passages F, and the fuel gas passage F is used as a discharge fuel gas passage Fe for discharging fuel gas from each of the fuel gas passages f.

An oxygen-containing gas supply pipe 20 is connected to the supply oxygen-side gas passage Si, and an oxygen-containing gas discharge pipe 21 is connected to the discharge oxygen-side gas passage Se via the base 16. A fuel gas supply pipe 22 is connected to the supply fuel gas passage Fi, and a fuel gas discharge pipe 23 is connected to the discharge fuel gas passage Fe via the base 16.

[Another Embodiment] Next, another embodiment will be described. (A) The arrangement of the plurality of holes 5h provided in the plate-shaped body 5 is such that the plurality of holes 5h are arranged in opposition to the openings o of the fuel gas flow path f as exemplified in the above embodiment. It is not limited to a simple arrangement. For example, the arrangement may be such that they are uniformly dispersed in a staggered or lattice-like manner in the plane direction of the plate-like body 5. In this case, when attaching the plate-like body 5 to the cell stack NC, it is not necessary to align the position with the opening o of the fuel gas flow path f, so that the attaching operation is simple.

Alternatively, if the distribution density of the holes 5h is made higher at a position where the dynamic pressure of the fuel gas flowing through the supply fuel side gas passage Fi becomes lower, the supply of the fuel gas to each fuel gas flow path f is performed. The variation in the amount can be further reduced.

(B) A plurality of holes 5 provided in the plate 5
The number, shape, and size of h can be appropriately set according to the supply amount of the fuel gas to each fuel gas flow path f, the dynamic pressure of the fuel gas flowing through the supply fuel-side gas passage Fi, and the like. For example, a plurality of slit-shaped holes 5h may be provided one by one so as to face the opening o of the fuel gas flow path f.

(C) As a specific configuration of the gas passage adjusting member P, the passage adjusting section p exemplified in the above embodiment is used.
Various configurations are possible in addition to the metal plate-like body 5 having the plurality of holes 5h functioning as a surface in a dispersed state in the plane direction. For example, the plate-like body 5 is not limited to metal, but may be ceramic, for example.

The thickness of the plate 5 may be increased so that the direction of the fuel gas ejected from each hole 5h can be imparted. If the fuel gas ejected from the hole 5h has directionality, it is possible to further reduce the variation in the supply amount of the fuel gas to each fuel gas flow path f.

Further, a configuration in which a plurality of pipes functioning as the passage adjusting section p are inserted through the plate-like body may be used. Again,
Directivity can be given to the fuel gas ejected from each pipe.

Further, it may be constituted by a plate-like porous member or a plate-like felt member through which gas can flow.

(D) In the above embodiment, the case where the gas passage adjusting member P is provided for the supply fuel side gas passage Fi has been exemplified. Instead, it may be provided for the discharge fuel side gas passage Fe. Further, instead of providing the gas passage adjusting member P in the fuel-side gas passage F as in the above-described embodiment, it may be provided in the oxygen-side gas passage S. Further, the gas passage adjusting member P may be provided for both the fuel gas passage F and the oxygen gas passage S.

(E) As shown in FIG. 8, the upper surface of the casing member 7 is formed to protrude outward from the plate-like body 5, and the protruding portion 7a is placed on the upper surface of the cell stack NC. Thereby, the plate-like body 5 and the casing member 7 may be supported by the cell stack NC. in this case,
Positioning pins 24 and positioning pins 2 are respectively provided on the protruding portion 7a of the casing member 7 and the upper surface of the cell stack NC.
4 may be separately provided with the positioning holes 7h. In this case, the work of installing the plate member 5 and the casing member 7 is further simplified.

(F) As the specific configuration of the frame forming member W, various configurations other than the configuration exemplified in the above embodiment are possible. For example, as shown in FIGS. 9 and 10, a pair of third rectangular bars 25 connected to the protruding ends 9 a of the pair of spacing members 9 at the intermediate portion in the longitudinal direction, respectively.
And a pair of fourth square rods 26 connected to the ends of the pair of third square rods 25, respectively. The thickness of each of the third rectangular bar 25 and the fourth rectangular bar 26 in the cell stacking direction is the same as the sum of the thickness of the cell C with separator and the thickness of the spacing member 9. A concave portion 25a having the same depth as the thickness of the spacing member 9 is formed in the middle portion in the longitudinal direction of the third rectangular rod-shaped body 25 in order to fit the protruding ends 9a of the pair of spacing members 9 respectively. is there. Therefore, in the third rectangular rod-shaped body 25, the thickness of the thin portion left by forming the concave portion 25a is the same as the thickness of the cell C with separator. In addition, the third square rod 2
5 are formed at both ends thereof, and at both ends of the fourth square bar 26, the recesses 25 of the third square bar 25 are formed.
A concave portion 26a for fitting b is formed.

When assembling the pair of third rectangular bars 25, the side surfaces of each of the thin portions are brought into close contact with the closed end surface of the cell C with a separator, whereby the oxygen-containing gas flow path s is formed. Opening o and the fuel gas flow path f
The opening o is partitioned off in an airtight state.

When the frame forming member W is configured as described above,
The opening o of the fuel gas flow path f is formed by the thin portions of the third rectangular bars 25 adjacent to each other in the cell stacking direction so as to open to the wall surface formed by the stacked third square bars 25. You. Then, the plate-like body 5 is placed in the third
It is adhered to the wall surface formed by the square rod-like body 25 with the sealing material 6. Therefore, each opening o of the fuel gas flow path f is closed by the plate-like body 5, and the hole 5h of the plate-like body 5 is
It is in communication with the opening o of the fuel gas flow path f.

In this case, the fuel gas is supplied to each fuel gas passage f only through the holes 5h communicating with the respective openings o. Can be further reduced than in the above embodiment.

(G) The laminated structure for laminating a plurality of cells C ′ can be variously modified other than the laminated structure exemplified in the above embodiment. For example, in the laminated structure of the above embodiment, the spacing member 9 and the frame forming member W may be integrally formed. In this case, the assembling work is simplified.

(H) In the above embodiment, the conductive separator 4 is provided on the side of the cell C 'facing the oxygen electrode 2 so as to define the in-cell flow path x functioning as the oxygen-containing gas flow path s. However, in place of this, the conductive separator 4 is connected to the fuel electrode 3 in the cell C ′.
May be provided on the side facing, so as to define and define an in-cell flow path x functioning as a fuel gas flow path f. The plurality of cells C with separators are held at intervals by the spacing member 9 so as to form an inter-cell flow path y functioning as an oxygen-containing gas flow path s between adjacent cells C with separators. They are juxtaposed in a stacked state.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a cell of a fuel cell and a cell with a separator.

FIG. 2 is an exploded perspective view showing a configuration of a cell stack.

FIG. 3 is a perspective view showing a configuration of a cell stack.

FIG. 4 is a cross-sectional plan view showing the entire configuration of the fuel cell.

FIG. 5 is a view as viewed from the direction of the arrows in FIG. 4;

FIG. 6 is a view as viewed from the direction of the arrow in FIG. 4;

FIG. 7 is a view as viewed from the direction of the arrow C in FIG. 4;

FIG. 8 is a longitudinal sectional side view showing the overall configuration of a fuel cell according to another embodiment.

FIG. 9 is a perspective view showing a configuration of a cell stack according to another embodiment.

FIG. 10 is a longitudinal sectional side view showing the overall configuration of a fuel cell according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolyte layer 2 Oxygen electrode 3 Fuel electrode 4 Flow path forming member 5 Plate 5h Hole 7 Casing member 8 Flexible conductive material 9 Spacing member f Fuel gas flow path o Opening p Passage adjustment part s Oxygen-containing gas flow path x Intra-cell flow path y Inter-cell flow path C Cell with flow path forming member C 'Cell F, S Gas path M Gas path forming member NC Cell stack P Gas passage regulator

Claims (4)

[Claims] 1. A fuel cell comprising: an oxygen electrode on one surface of an electrolyte layer and a fuel electrode on the other surface; an oxygen-containing gas flow path on a side facing the oxygen electrode; and The cell stack is arranged side by side in a stacked state with a fuel gas flow path provided on the side facing the fuel electrode, and an opening of the oxygen-containing gas flow path is provided on the outer periphery of the cell stack, and A fuel cell provided with an opening of the fuel gas flow path, and provided with a gas passage communicating with each of the openings of the oxygen-containing gas flow path or each of the openings of the fuel gas flow path, Supply of gas supplied from the gas passage to each flow path through the respective openings in the stacked body at the outer periphery where the respective openings of the oxygen-containing gas flow paths or the respective openings of the fuel gas flow paths are disposed. In order to equalize the volume, gas A fuel cell provided with a gas passage adjuster integrally formed with a passage adjuster for adjusting the excess. 2. The fuel cell according to claim 1, wherein the gas passage adjusting member is formed of a metal plate having a plurality of holes functioning as the passage adjusting portion and dispersed in a plane direction. . 3. A metal member, wherein a gas passage forming member that defines the gas passage is connected to the metal plate to define the gas passage using the metal plate. 3. The fuel cell according to claim 2, wherein the fuel cell is constituted by a casing member made of a material. 4. A flow path forming member, as one of the oxygen-containing gas flow path and the fuel gas flow path, on one of a side facing the oxygen electrode and a side facing the fuel electrode in the cell. The cell with a flow path forming member provided to partition and form a functioning cell flow path is formed in a rectangular plate shape, and the flow path is formed by the flow path forming member. One pair of opposed end surfaces of the cell with the forming member is an open end surface having an opening of the intra-cell flow path, and the other pair of opposed end surfaces is a closed end surface in which the intra-cell flow path is closed. A plurality of the cells with a flow path forming member, the inter-cell flow path functioning as one of the fuel gas flow path and the oxygen-containing gas flow path between adjacent cells with the flow path forming member Form Between the adjacent cells with the flow path forming member, adjacent to each other with a pair of spacing members provided separately at the ends on the side of the pair of open end faces, and are juxtaposed in a stacked state while being held at an interval from each other. The inter-cell flow path is closed by the pair of spacing members on the pair of open end faces, and is provided with an opening on the pair of closed end faces, and in the cell stacking direction. Each of the adjacent cells with the flow path forming member is filled with a flexible conductive material formed so as to allow gas to flow therethrough, and the gas passage adjusting body is provided in the cell stack, wherein the inter-cell flow is performed. The fuel cell according to any one of claims 1 to 3, wherein one of the pair of openings of the road is provided on an outer peripheral portion where each of the openings is arranged.