JP3065803B2 - Fuel cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to one of plate electrolyte layers.
A film or plate oxygen electrode on one side and a film or plate on the other side
For a rectangular three-layer plate-shaped body with a
Separation only on one of the oxygen electrode side and the fuel electrode side
And an oxygen electrode or the fuel electrode and the fuel cell.
An oxygen-containing gas flow path or fuel gas flow path
A rectangular plate-shaped cell to be formed is configured, and the cell is
Separate one side of the cell by the separator
The pair of end faces is the oxygen-containing gas flow path or the fuel gas flow.
The open end face where the road is open, the other pair of opposite ends
Surface, the oxygen-containing gas flow path or the fuel gas flow path is closed
A pair of elongate first spacers configured to be closed end faces;
A wall material and a pair of long second partition walls are stacked in a grid pattern
And the cell has a pair of end portions on the opening end surface side.
A state of being placed on each of the upper portions of the pair of first partition members, respectively.
By being disposed between the pair of second partition members,
A plurality of the cells may have a fuel gas flow path or between the cells.
Are juxtaposed in a stacked state with the oxygen-containing gas flow path formed
The present invention relates to a fuel cell in which a cell integrated group is formed .

[0002]

2. Description of the Related Art Such a fuel cell is shown in FIG.
A pair of elongated first partition walls 6 and 6 and a pair of elongated
The second bulkhead members 7 and 7 are stacked in a grid pattern to form a rectangular plate-shaped fuel.
The cell C of the fuel cell is connected to the oxygen-containing gas flow in the cell C.
A pair of ends on the open end face side where the passage or fuel gas flow path is open
Placed on each of the upper portions of the pair of first partition members 6, 6
Is disposed between the pair of second partition members 7, 7 in a state where
This allows a plurality of cells C to be
Stack with the gas flow path or oxygen-containing gas flow path formed
The cell integrated groups NC are formed side by side. This
Therefore, it is necessary to form them in a state where they are separated from each other.
The oxygen-containing gas flow path and the fuel gas flow path are easily formed.
I have. Conventionally, such a fuel cell is shown in FIG.
Thus, both end surfaces 6A, 6A of the first partition wall member 6 are formed in a state orthogonal to the side surface 6C, and both end surfaces 7A, 7A of the second partition wall member 7 are orthogonal to the side surface 7C. It was formed in a state.

Then, gas supply paths Kf and Ks for supplying oxygen-containing gas or fuel gas to the cells C, respectively, or the cells C
When the flow path forming members 11 for forming the gas discharge paths Hf and Hs for discharging the discharged oxygen-containing gas or the discharged fuel gas from the respective sides are provided on the side surfaces of the cell accumulation group, the opening ends of the flow path forming members 11 Are formed on the side surfaces of the cell integration group formed in the stacking direction of the cell integration group by the end surfaces 6A of the first partition material 6 and the side surfaces 7C of the second partition material 7, respectively, or the second partition material 7 and the first partition wall material 6
Of the cell integration group formed in the stacking direction of the cell integration group by the respective side surfaces 6C.

[0004]

However, since there is a dimensional error between each of the first partition members 6 and between each of the second partition members 7, the dimensional error causes
The both side end portions formed by the end surfaces 6A of the partition member 6 and the side surfaces 7C of the second partition member 7, and the second partition member 7
In this case, there is a problem that the both end portions formed by the end surfaces 7A and the side surfaces 6C of the first partition wall material 6 become uneven.

[0005] Therefore, since the both side ends of the side surface of the cell integration group are uneven, when connecting the opening end of the flow path forming member 11 to each of the both side ends, the gas from the connection point is not required. There has been a problem that the seal configuration for preventing leakage becomes very complicated.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to form them in a state where they are separated from each other.
Necessary oxygen-containing gas passages and fuel gas passages are formed.
In addition to providing means for absorbing dimensional errors of each of the first partition material and the second partition material stacked in a grid pattern to form a cell integrated group while facilitating the sealing, a seal for providing the flow path forming member is provided. This is to simplify the configuration.

[0007]

According to a first feature of the fuel cell according to the present invention, a columnar body is erected at each of four corners of the cell integrated group, and the columnar body is provided with the columnar body of the cell integrated group. In the stacking direction view, a planar contact surface is provided that intersects with each of the two side surfaces of the cell integration group connected to the corner, and both end surfaces of the first partition wall material and the second partition material Both end surfaces are formed in an inclined shape so as to be able to be brought into close contact with each of the contact surfaces of each of the columnar bodies, and a gap between the second partition material and the closed end surface of the cell is formed.
In addition, a sealing material for sealing the gap in an airtight state
The point is that it is filled .

A second characteristic configuration is that a gas supply path for supplying an oxygen-containing gas or a fuel gas to each of the cells over the longitudinal direction of the columnar body, or an oxygen-containing gas or an exhaust fuel discharged from each of the cells. The point is that a flat connection surface for closely attaching a flow path forming member for forming a gas discharge path for discharging gas is provided.

[0009]

According to the first characteristic configuration, a pair of first elongated members is formed.
A partition material and a pair of elongated second partition materials are stacked in a grid pattern
The cells of a rectangular plate-shaped fuel cell are
Element-containing gas flow path or fuel gas flow path
Place each of the pair of ends on the upper portion of each of the pair of first partition walls.
By disposing it between the pair of second partition members in a state where
The fuel gas flow path or acid between the cells.
In a stacked state with the element-containing gas flow path formed
A cell integrated group is formed. At this time, by moving the first partition wall material in a direction perpendicular to the stacking direction of the cell integration group with respect to the two pillars located at both ends thereof, each of both end faces of the first partition wall material is The two columnar bodies can be brought into close contact with the respective application surfaces. Similarly, the second
By moving the partition wall material in a direction orthogonal to the stacking direction of the cell stacking group with respect to the two columnar bodies located at both ends thereof, each of both end faces of the second partition wall member is formed by the two columnar members. The body can be brought into close contact with each application surface. As described above, each of both end faces of the second partition wall material has two columnar shapes.
By bringing the body into close contact with each application surface
Thus, a gap is formed between the second partition wall material and the closed end face of the cell.
However, the gap is filled with a sealing material to fill the gap.
Seal tightly. Therefore, the oxygen-containing gas flow path and the fuel
Gas passages can be formed in a state where they are separated from each other.
You. Further, the flow path forming member is provided by connecting the open end thereof to each of the columnar bodies on both sides of the side surface of the cell integration group.

According to the second characteristic configuration, the flow path forming member is connected by bringing its open end into surface contact with each of the planar connection surfaces of the columnar members located on both sides of the side surface of the cell integration group. It is provided by doing.

[0011]

According to the first characteristic configuration, even if there is a dimensional error in each of the first partition member and the second partition member, the first partition member can be used.
By moving each of the partition wall material and the second partition wall material in a direction orthogonal to the stacking direction of the cell stacking group, each of the two end surfaces thereof is moved to the contact surface of each of the two columnar bodies located at both end portions thereof. Therefore, the dimensional error of each of the first partition material and the second partition material can be absorbed.
Further, since the flow path forming member can be provided by connecting the open end thereof to each of the columnar bodies on both sides of the side surface of the cell integration group, the two side surfaces of the unevenness on the side surface of the cell integration group as in the related art can be provided. Compared with connecting to each part, the seal configuration when providing the flow path forming member can be simplified. Follow
Containing oxygen that needs to be formed
While facilitating the formation of the gas flow path and the fuel gas flow path, the cell
First gaps stacked in a girder form to form a cluster
Hand for absorbing the dimensional error of each of the wall material and the second partition material
Steps are provided, and the sheet for forming the flow path forming member is provided.
Configuration can be simplified.

According to the second characteristic configuration, the sealing configuration for providing the flow path forming member can be further simplified, and the sealing performance can be improved.

[0013]

【Example】

[First Embodiment] A first embodiment will be described below with reference to FIGS.

First, the configuration of the cell C of the fuel cell will be described.

A plate-shaped solid electrolyte layer 1 having a rectangular planar shape has a film-shaped or plate-shaped oxygen electrode 2 on one surface, and a film-shaped or plate-shaped fuel electrode 3 on the other surface. A three-layer plate-like body having a rectangular planar shape for obtaining an electromotive force from the oxygen electrode 2 and the fuel electrode 3 is formed in such a manner that it is integrally attached to almost the entire surface.

The solid electrolyte layer 1 is made of tetragonal ZrO ₂ in which about 3 mol% of Yt is dissolved, and other suitable materials. The oxygen electrode 2 is made of LaMnO ₃ and other suitable materials. The fuel electrode 3 is made of a cermet of Ni and ZrO ₂ , or any other suitable material.

On the oxygen electrode 2 side of the three-layer plate-like body, a conductive separator 4 having a pair of ridges 4a is attached by attaching the ridges 4a to the oxygen electrode 2 over the entire length thereof.
Thereby, the oxygen-containing gas flow path s is defined between the oxygen electrode 2 and the conductive separator 4, and the peripheral portion between the conductive separator 4 and the three-layer plate-like body when viewed in the flow direction of the oxygen-containing gas flow path s. And the oxygen-containing gas flow path s, the fuel cell flow path f is divided into a rectangular plate-shaped fuel cell C.
That is, the cell C is formed by the conductive separator 4
C, one pair of opposite end faces is
The flow path s becomes an open end face, and the other
The pair of end faces is a closed end face in which the oxygen-containing gas flow path s is closed.
It is configured so that:

The opening formed by the three-layer plate and the conductive separator 4 at one open end face of the cell C is defined as an oxygen-containing gas flow path inlet si, and the other open end face. The opening formed by the three-layer plate and the conductive separator 4 is defined as an oxygen-containing gas channel outlet so.

The conductive separator 4 is made of LaCrO ₃ having excellent resistance to oxidation and reduction, and other suitable materials.

In the oxygen-containing gas flow path s, an oxygen-side conductive material 5
Are arranged in parallel at substantially equal intervals and in close contact with the oxygen electrode 2 and the conductive separator 4 to increase the cross-sectional area of the electric passage from the oxygen electrode 2 to the conductive separator 4 as a cell terminal. I have.

The oxygen-side conductive material 5 is made of LaMnO ₃ having excellent heat resistance and oxidation resistance, and other suitable materials.

Next, the configuration of a cell integrated group NC in which a plurality of rectangular plate-shaped cells C are juxtaposed in a stacked state will be described.

A pair of first partition members 6 each having a long rectangular column shape
6 and a pair of long and quadrangular prism-shaped second partition members 7 and 7 are stacked in a grid pattern, and the cell C is open to the oxygen-containing gas flow path s of the cell C (ie, , Open end face side
) To a pair of first partition members 6, respectively.
A plurality of cells C are arranged side by side in a stacked state by being arranged between a pair of second partition members 7 in a state of being placed on each of the six upper parts, thereby forming a cell integrated group NC.

Further, columnar bodies 8 are erected at each of the four corners of the cell integration group NC, and the columnar bodies 8 are connected to the cell integration groups connected to the corners when viewed in the stacking direction of the cell integration group NC. The NC has a flat contact surface 8A that intersects with each of the two side surfaces, and both end surfaces 6A, 6A of the first partition wall member 6 and both end surfaces 7A, 7A of the second partition wall member 7, respectively. The two pillars 8, 8 located at both ends are formed in an inclined shape so that they can be brought into close contact with the respective contact surfaces 8A, 8A.

The column 8 will be described. The cross-sectional shape of the columnar body 8 is a trapezoid in which one hypotenuse is orthogonal to the upper base and the lower base, and the other hypotenuse is inclined at 45 ° to the lower base, corresponding to the hypotenuse inclined at 45 °. Pillar 8
Is used as a contact surface.

Regarding the first partition wall member 6 and the second partition wall member 7,
Add a description. Both end surfaces 6A, 6A of the first partition wall member 6 are 45 degrees from the side faces of the first partition wall member 6 facing the cell integration group NC in the stacking direction of the cell integration group NC.
It is formed to be inclined at °. Similarly, both end surfaces 7A, 7A of the second partition wall member 7 are also inclined at 45 ° with respect to the side surface of the second partition wall member 7 facing the cell integration group NC in the stacking direction of the cell integration group NC. It is formed as follows. The thickness of the second bank member 7 in the stacking direction of the cell integrated group NC is substantially the same as the thickness of the cell C.

Next, a method of forming the cell integrated group NC will be described.

First, the four pillars 8 are connected to the cell integrated group NC.
, And each of the contact surfaces 8A is erected so as to intersect at 45 ° with each of the two side surfaces of the cell integrated group NC connected to the corner.

Next, by moving the pair of first partition members 6, 6 in a direction orthogonal to the stacking direction of the cell integrated group NC, both end surfaces 6 A, 6 A of the first partition members 6 are respectively formed. The two columnar bodies 8, 8 located at both ends are provided in a state of being brought into close contact with the respective contact surfaces 8A, 8A.

Subsequently, by moving the pair of second partition members 7, 7 in a direction orthogonal to the stacking direction of the cell integrated group NC, the respective end surfaces 7 A, 7 A respectively become the second partition members 7.
Are stacked on the pair of first partition members 6, 6 in a state of being in close contact with the respective contact surfaces 8A, 8A of the two columnar members 8, 8 located at both ends of the pair.

Subsequently, the pair of ends of the cell C where the oxygen-containing gas passage s of the cell C is opened are in close contact with the upper portions of the pair of first partition members 6 and 6, respectively. In a state of being placed, it is arranged between the pair of second partition members 7, 7.

Subsequently, a pair of first partition members 6 and 6 are provided on the cell C in the same manner as described above, and a pair of second partition members 7 and 6 are further disposed on the pair of first partition members 6 and 6. , 7 are stacked in a grid pattern in the same manner as described above, and the pair of second partition members 7,
By repeatedly arranging the cells C in the same manner as described above, a plurality of cells C are juxtaposed in a stacked state to constitute a cell integrated group NC.

Incidentally, a pair of both end surfaces of the cell C which are closed by the conductive separator 4 (that is, correspond to a closed end surface).
A pair of gaps are formed by each of the end faces of the pair of second partition wall members 7 and 7, respectively, and one end of each of the gaps (at the flow path inlet si of the oxygen-containing gas flow path s). The corresponding side) is filled with a sealing material 9 to seal the gap in an airtight state. Further, the first partition wall members 6 and 6 are in close contact with the two edge portions in the stacking direction at each of the pair of ends where the oxygen-containing gas flow path s of the cell C is opened.

Therefore, each of the adjacent cells C is separated from the oxygen-containing gas flow path s by a pair of first partition walls 6 and 6 and a fuel gas flow path f is formed.

The openings formed on one side of each of the openings formed on both side surfaces of the cell integrated group NC are formed by the second partition members 7 adjacent to each other in the stacking direction. The inlet fi is defined, and the opening formed on the other side is defined as the fuel gas channel outlet fo.

In each of the fuel gas flow paths f between the adjacent cells C, a fuel-side flexible conductive material 10 that allows gas flow and absorbs thermal strain in the thickness direction of the cell C is provided. It has been filled. The fuel-side flexible conductive material 10 is made of a Ni felt-like material having excellent heat resistance and reduction resistance, and other suitable materials.

Next, the configuration of the fuel cell will be described.

An oxygen-containing gas supply path Ks for supplying an oxygen-containing gas to each of the oxygen-containing gas flow paths s of each of the cells C, and a fuel gas flow of each of the cells C are provided on each of the side surfaces of the cell integrated group NC configured as described above. A fuel gas supply path Kf for supplying fuel gas to each of the paths f, and an oxygen-containing gas discharge path H for discharging exhausted oxygen-containing gas from each of the oxygen-containing gas flow paths s of the cells C.
and a flow path forming member 11 for forming a fuel gas discharge path Hf for discharging the discharged fuel gas from each fuel gas flow path f of each cell C.

The flow path forming member 11 will be described in more detail. The flow path forming member 11 includes left and right side walls 11A, 11A, upper and lower side walls 11B, 11B, and a bottom wall 11C.
It is constructed by assembling into a box shape using D.

The flow path forming member 11 has the left and right side walls 11A, 11A positioned on both sides of the side face of the cell stacking group with the box-shaped opening end facing the side face of the cell stacking group NC. It is provided by connecting the side surfaces 8B, 8B of the columnar bodies 8, 8 respectively in surface contact. That is, the columnar body 8
The side surface 8B is a planar connection surface for bringing the flow path forming member 11 into close contact.

[Second Embodiment] A second embodiment will be described below with reference to FIGS.

Cell C constructed in the same manner as in the first embodiment described above.
Are arranged side by side in a stacked state in the same manner as in the first embodiment to form a cell integrated group NC.

However, the difference from the first embodiment is that a recess 6B is formed in one of the pair of first partition members 6, 6, and that the second partition wall adjacent in the laminating direction is different from the first embodiment. Lumber 7, 7
Thus, in each of the openings formed on both side surfaces of both sides of the cell integrated group NC, the flow path inlet forming member 12 is formed in such a state that the opening 12A is formed on the side of the opening close to the oxygen-containing gas flow path inlet si. Is provided.

The opening 1 in the fuel gas passage f
The portions facing the respective 2A and 12A are defined as fuel gas channel inlets fi and fi, and the portions facing the recess 6B of the first partition wall member 6 in the fuel gas channel f are defined as the fuel gas channel outlet fo.

That is, the fuel gas passage outlet fo is connected to the cell C
The fuel gas is formed on the same side edge as the existence side edge of the oxygen-containing gas flow path outlet so in the fuel gas flow path inlet f on both sides.
It is configured to be able to flow from i and fi to the fuel gas flow path outlet fo in a bent flow state.

Further, on the side surface of the cell integrated group NC provided with the oxygen-containing gas flow path inlet si, a flow path forming member 11 for forming the cell oxygen-containing gas supply path Ks is provided with a fuel gas flow path inlet fi. , Fi, a flow path forming member 11 for forming a fuel gas supply path Kf, an oxygen-containing gas flow path exit so and a fuel gas flow path exit fo, respectively. Are formed on the side surface of the cell integrated group NC provided with the gas flow path Hsf for forming the gas discharge path Hsf for discharging the discharged oxygen-containing and discharged fuel gas.
Are provided in the same manner as in the first embodiment. The gas discharge path Hsf is also used as a combustion chamber that burns the exhausted oxygen-containing and exhausted fuel gas.

Third Embodiment A third embodiment will be described below with reference to FIGS.

A plurality of cells C constructed in the same manner as in the second embodiment are juxtaposed in a stacked state as in the second embodiment to form a cell integrated group NC.

However, the difference from the second embodiment is that the cross section of the column 8 is a right-angled isosceles triangle, and the flat side surface 8A of the column 8 corresponding to the hypotenuse is different. It is a point as a contact surface. In the same manner as in the second embodiment described above, when the columnar body 8 is viewed from the cell stacking group NC in the stacking direction, the contact surface 8A has two side surfaces of the cell stacking group NC connected to the corners of the cell stacking group NC. They are erected at an angle of 45 °.

The cell integrated group N configured as described above
A flow path forming member 11 for forming the oxygen-containing gas supply path Ks is provided on the side surface of the cell integrated group NC provided with the oxygen-containing gas flow path entrance si of C, and the oxygen-containing gas flow path outlet so and On the side surface of the cell integrated group NC provided with the fuel gas flow path outlet fo, there is provided a flow path forming member 11 for forming a gas discharge path Hsf for discharging discharged oxygen containing and discharged fuel gas. The gas discharge path Hsf is also used as a combustion chamber that burns the exhausted oxygen-containing and exhausted fuel gas.

The flow path forming member 11 has the left and right side walls 1 with the box-shaped opening end facing the side surface of the cell integrated group NC.
1A and 11A are provided by connecting the side surfaces (corresponding to planar connection surfaces) 8B and 8B of the columnar bodies 8 and 8 located on both sides of the side surface of the cell integration group, respectively. .

Accordingly, in this state, both side surfaces of the cell integrated group NC provided with the fuel gas flow path entrances fi and fi in the cell integrated group NC are open to the outside, and the both side surfaces are respectively opened. Although not shown, a water cooling pipe or the like for cooling is provided between adjacent cells C, using the fuel gas flow path inlets fi, fi, respectively.

The cell integrated group N configured as described above
C is disposed inside the box 13. Therefore, each of the fuel gas flow path inlets fi and fi faces the inside of the box 13, and the inside of the box 13 functions as the fuel gas supply path Kf.

[Fourth Embodiment] Hereinafter, a fourth embodiment will be described with reference to FIG.
This will be described with reference to FIG.

A pair of first and second elongated partition walls 6 in the form of a rectangular
6 and a pair of long, square pole-shaped second partition members 7, 7 are stacked in a grid pattern, and a plurality of cells C are juxtaposed in the surface direction with a partition member 14 interposed therebetween. Each of the pair of ends of the cell C having the oxygen-containing gas flow path s opened and the both ends of the partition member 14 are respectively formed by a pair of the first partition members 6 and 6 at the upper ends of the pair of first partition members 6 and 6, respectively. By arranging a plurality of the cell rows RC in a stacked state by arranging them between the pair of second partition members 7 in a state where they are placed in the cell stacking group NC.

Further, columnar bodies 8 are erected at each of the four corners of the cell integration group NC, and the columnar bodies 8 are connected to the cell integration groups connected to the corners when viewed in the stacking direction of the cell integration group NC. The NC has a flat contact surface 8A that intersects with each of the two side surfaces, and both end surfaces 6A, 6A of the first partition wall member 6 and both end surfaces 7A, 7A of the second partition wall member 7, respectively. The two pillars 8, 8 located at both ends are formed in an inclined shape so that they can be brought into close contact with the respective contact surfaces 8A, 8A.

The column 8 will be described. The cross-sectional shape of the columnar body 8 is a trapezoid in which one hypotenuse is orthogonal to the upper base and the lower base, and the other hypotenuse is inclined at 45 ° to the lower base, corresponding to the hypotenuse inclined at 45 °. Pillar 8
8A as a contact surface.

Regarding the first partition wall member 6 and the second partition wall member 7,
Add a description. Both end surfaces 6A, 6A of the first partition wall member 6 are 45 degrees from the side faces of the first partition wall member 6 facing the cell integration group NC in the stacking direction of the cell integration group NC.
It is formed to be inclined at °. Further, in one of the pair of first partition members 6, 6, a concave portion 6B is formed corresponding to the mounting position of each cell C.

Similarly, both end surfaces 7A, 7A of the second partition wall member 7 are formed.
Each of them is formed so as to be inclined at 45 ° with respect to the side surface of the second partition wall member 7 facing the cell integration group NC when viewed in the stacking direction of the cell integration group NC. In addition, the thickness of the second bank member 7 in the stacking direction of the cell integrated group NC is as follows:
The thickness is almost the same as the thickness of the cell C.

Next, a method of forming the cell integrated group NC will be described.

First, the four pillars 8 are connected to the cell integrated group NC.
, And each of the contact surfaces 8A is erected so as to intersect at 45 ° with each of the two side surfaces of the cell integrated group NC connected to the corner.

Next, by moving the pair of first partition members 6, 6 in a direction orthogonal to the stacking direction of the cell integrated group NC, both end surfaces 6 A, 6 A of the first partition members 6 are respectively formed. The two columnar bodies 8, 8 located at both ends are provided in a state of being brought into close contact with the respective contact surfaces 8A, 8A.

Subsequently, by moving the pair of second partition members 7, 7 in a direction perpendicular to the stacking direction of the cell integrated group NC, the respective end surfaces 7 A, 7 A respectively become the second partition members 7.
Are stacked on the pair of first partition members 6, 6 in a state of being in close contact with the respective contact surfaces 8A, 8A of the two columnar members 8, 8 located at both ends of the pair.

Subsequently, the cell row RC is divided into a pair of first partition members 6, each of a pair of ends of the cell C, each of which the oxygen-containing gas passage s is opened, and both ends of the partition member 14. 6
In a state in which each of them is placed in close contact with each of the upper portions, a pair of second
It is arranged between the partition members 7,7.

Subsequently, a pair of first cells is placed on the cell row RC.
The partition members 6 and 6 are provided in the same manner as described above, and a pair of second partition members 7 and 7 are stacked on the pair of first partition members 6 and 6 in a cross-like manner as described above. By repeatedly arranging the cell rows RC between the second partition members 7 in the same manner as described above, a plurality of cell rows RC are juxtaposed in a stacked state to form a cell integrated group NC.

A gap is formed between each end face of the cell C located at both ends of the cell row RC, which is closed by the conductive separator 4, and each end face of the pair of second partition members 7, 7. However, one end of each of the gaps (the side corresponding to the flow path inlet si of the oxygen-containing gas flow path s) is filled with a sealing material 9 to seal the gaps in an airtight state. Further, the first partition wall members 6 and 6 are in close contact with the two edge portions in the stacking direction at each of the pair of ends where the oxygen-containing gas flow path s of the cell C is opened.

The second partition members 7, 7 adjacent in the laminating direction
Thus, in each of the openings formed on both side surfaces of both sides of the cell integrated group NC, the flow path inlet forming member 12 is formed in such a state that the opening 12A is formed on the side of the opening close to the oxygen-containing gas flow path inlet si. Is provided.

Then, each of the adjacent cell columns RC and RC is
The oxygen-containing gas flow path s is defined as a fuel gas flow path f which is separated from the oxygen-containing gas flow path f.
2A, the fuel gas passage inlets fi, f
i, and a portion of the fuel gas flow channel f facing each of the recesses 6B of the first partition wall member 6 is defined as a fuel gas flow channel outlet fo.

The fuel-side flexible conductive material 10 that allows gas flow and absorbs thermal strain in the thickness direction of the cell C is provided in each of the fuel gas flow paths f between the adjacent cells C. It has been filled.

That is, the fuel gas passage outlet fo is connected to the cell C
The fuel gas is formed on the same side edge as the existence side edge of the oxygen-containing gas flow path outlet so in the fuel gas flow path inlet f on both sides.
It is configured such that it can flow from i and fi to each of the fuel gas flow path outlets fo in a bent flow state.

On the side surface of the cell integrated group NC provided with the oxygen-containing gas flow path inlet si, a flow path forming member 11 for forming the cell oxygen-containing gas supply path Ks is provided with a fuel gas flow path inlet fi. , Fi, a flow path forming member 11 for forming a fuel gas supply path Kf, an oxygen-containing gas flow path exit so and a fuel gas flow path exit fo, respectively. Are formed on the side surface of the cell integrated group NC provided with the gas flow path Hsf for forming the gas discharge path Hsf for discharging the discharged oxygen-containing and discharged fuel gas.
Are provided in the same manner as in the first embodiment. The gas discharge path Hsf is also used as a combustion chamber that burns the exhausted oxygen-containing and exhausted fuel gas.

[Another Embodiment] Next, another embodiment will be described.

In each of the above embodiments, the contact surface 8 A of the columnar body 8 is viewed in the stacking direction of the cell integrated group NC.
Is erected in a state of intersecting at an angle of 45 ° with each of the two side surfaces of the cell integration group NC connected to the corners of the cell integration group NC. The angle that intersects can be variously changed.

However, as in the above embodiments, the contact surface 8
When A crosses at 45 ° each of the two side surfaces of the cell integrated group NC connected to the corner of the cell integrated group NC, both end surfaces 6A and 6A of the first partition wall member 6 and the second partition wall member 7 It is preferable because both end faces 7A, 7A can be formed to be inclined at 45 °.

The shape of the columnar body 8 can be variously changed. For example, as shown in FIG. 13, the cross-sectional shape is an arc shape, and the planar side surface 8 A of the columnar body 8 corresponding to the bowed chord is formed. It may be used as a contact surface. In this case, the cylindrical flow path forming member 11 is provided in such a manner that its inner peripheral surface is in close contact with the outer peripheral surface of each of the four columnar bodies 8, and the inner peripheral surface of the cylindrical flow path forming member 11 is provided. The four spaces formed by the surface and the side surface of the cell integrated group NC are respectively defined as oxygen-containing gas supply paths Ks,
A fuel gas supply path Kf, an oxygen-containing gas discharge path Hs, and
The fuel gas discharge path is assumed to be Hf. In each of the above embodiments, the conductive separator 4 is
The oxygen-containing gas flow path s is provided between the oxygen electrode 2 and the conductive separator 4, and the conductive separator 4 and the three-layer plate-like body are viewed in the flow direction of the oxygen-containing gas flow path s. The case where the cell C is configured as the fuel gas flow path f separated from the oxygen-containing gas flow path s by the periphery of
Instead, a conductive separator 4 is attached to the fuel electrode 3 side, and a space between the fuel electrode 3 and the conductive separator 4 is defined as a fuel gas flow path f. The peripheral portion between the porous separator 4 and the three-layer plate is defined as an oxygen-containing gas flow path s separated from the fuel gas flow path f by a cell C.
May be configured.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a fuel cell according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing an upper surface of a first partition wall member in the fuel cell according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional plan view showing an upper surface of a second partition member in the fuel cell according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of a fuel cell according to a second embodiment of the present invention.

FIG. 5 is a plan sectional view showing the upper surface of a first partition wall member in a fuel cell according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional plan view showing an upper surface of a second partition wall member in a fuel cell according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of a fuel cell according to a third embodiment of the present invention.

FIG. 8 is a plan sectional view showing the upper surface of a first partition wall member in a fuel cell according to a third embodiment of the present invention.

FIG. 9 is a plan sectional view showing an upper surface of a second partition wall member in a fuel cell according to a third embodiment of the present invention.

FIG. 10 is an exploded perspective view of a fuel cell according to a fourth embodiment of the present invention.

FIG. 11 is a plan sectional view showing the upper surface of a first partition wall member in a fuel cell according to a fourth embodiment of the present invention.

FIG. 12 is a cross-sectional plan view showing an upper surface of a second partition wall material in a fuel cell according to a fourth embodiment of the present invention.

FIG. 13 is an exploded perspective view of a fuel cell according to another embodiment.

FIG. 14 is a perspective view of a conventional fuel cell.

[Description of Signs] 1 Plate-shaped electrolyte layer 2 Oxygen electrode 3 Fuel electrode 4 Separator 6 First partition material 6A End face 7 Second partition material 7A End face 8 Columnar body 8A Applied surface 8B Connection surface 9 Seal material 11 Flow path forming member f fuel gas flow path s oxygen-containing gas flow path C cell Kf, Ks gas supply path Hf, Hs, Hsf gas discharge path NC cell integrated group

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01M 8/00-8/24

Claims (2)

(57) [Claims] A plate-like electrolyte layer (1) has a film-like or
Denotes a plate-like oxygen electrode (2) and a film-like or plate-like
For the rectangular three-layer plate with the fuel electrode (3) attached,
Either the oxygen electrode (2) side or the fuel electrode (3) side
A separator (4) is provided only on the side
(2) Or the fuel electrode (3) and the separator (4)
Between the oxygen-containing gas flow path (s) or the fuel gas flow path (f)
Are formed, and a rectangular plate-like cell (C) forming
(C) is the cell by the separator (4).
One pair of opposite end faces in (C) is the acid
Element-containing gas channel (s) or fuel gas channel (f) opened
It becomes an open end face, and the other pair of opposite end faces is
Oxygen-containing gas flow path (s) or fuel gas flow path (f) is closed
And a pair of elongated first partition members (6), (6).
The pair of second bulkhead members (7) and (7) are stacked in a grid pattern.
And the cell (C) is a pair of end members on the opening end surface side.
Each of the pair of first partition members (6), (6)
In a state in which the pair of second partition members (7),
(7) The cell (C) is duplicated by being disposed between the cells.
The number of fuel gas passages (f) between the cells (C) or
Is a laminated state in which the oxygen-containing gas flow path (s) is formed
A cell integrated group (NC) formed side by side with a column (8), wherein a column (8) is erected at each of four corners of the cell integrated group (NC), and the column (8) A planar contact surface (8A) intersecting with each of two side surfaces of the cell integration group (NC) connected to the corner when viewed in the stacking direction of the cell integration group (NC); The two end surfaces (6A) and (6A) of the first partition wall member (6) and the both end surfaces (7A) and (7A) of the second partition wall member (7) respectively correspond to the columnar bodies (8) and (8). ) Each of the contact surfaces (8
A) and (8A) are formed in an inclined manner so as to be able to adhere to each of the second partition wall material (7) and the cell.
In the gap with the closed end face of
A fuel cell filled with a sealing material (9) for sealing . 2. A gas supply path (Ks) or (Kf) for supplying an oxygen-containing gas or a fuel gas to each of the cells (C) along the longitudinal direction of the column (8). C) Gas discharge paths (Hs), (Hf), (Hs) for discharging the discharged oxygen-containing gas or discharged fuel gas from each of them.
The fuel cell according to claim 1, further comprising a planar connection surface (8B) for closely adhering the flow path forming member (11) for forming f).