JP2000182638A - Fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniform a reactive gas flow in a reaction part so as to enhance the power generating efficiency of a battery by differing a distance between a reactive gas inlet and a reactive part from a distance between the reactive part and a reactive gas outlet each other. SOLUTION: In this fuel cell, a fuel gas inlet 19a and an oxidizer gas inlet 20a in the same shape with a large opening area and a fuel gas outlet 19b and an oxidizer gas outlet 20b in the same shape with a small opening area are formed in barrier plates 14 and 15. During high speed operation, flows of a fuel gas and an oxidizer gas are equally guided to first and second reaction parts A and B without bias toward each end part even if the passage resistance of the reaction parts A and B is increased. A distance between the fuel gas inlet 19a and the first reaction part A is formed shorter than that between the fuel gas outlet 19b and the first reaction part A; and a distance between the oxidizer gas inlet 20a and the second reaction part B is formed shorter than that between the second reaction part B and the oxidizer gas outlet 20b. During heavily loaded operation, a weakened flow at a downstream side of each reactive gas inlet is prevented and a reactive gas flow in the reaction parts A and B becomes uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell in which unit cells using a fuel gas and an oxidizing gas as reaction gases are stacked on each other.

[0002]

2. Description of the Related Art One type of fuel cell is disclosed in
As disclosed in JP-A-55061, JP-A-8-124592, etc., an electrolyte membrane, an anode located on one side of the electrolyte membrane, a cathode located on the other side of the electrolyte membrane, and an anode electrolyte membrane A first partition wall forming a first reaction section to which a fuel gas is supplied at a position opposite to the above, and an oxidizing gas being supplied at a position opposite to the cathode electrolyte membrane; There is a fuel cell of a type in which unit cells each having a second partition part forming a second reaction part to be formed and using a fuel gas and an oxidizing gas as a reaction gas are stacked on each other.

[0003] In this type of fuel cell, a fuel gas supply passage extending in the stacking direction of the unit cells and supplying and discharging fuel gas to and from a first reaction unit is provided in a stack formed by stacking a plurality of unit cells. A fuel gas discharge path, and an oxidant gas supply path and an oxidant gas discharge path that extend in the stacking direction of the unit cells and supply and discharge the oxidant gas to and from the second reaction unit. The fuel gas is supplied to the fuel gas supply path, and the oxidant gas is supplied to the oxidant gas supply path.

In the fuel cell, the fuel gas supplied from the fuel gas supply path to the first reaction section through the fuel gas inlet of each cell contacts the anode in the reaction section and contributes to the reaction at the anode. After that, the oxidizing gas flowing out of the fuel gas outlet to the fuel gas discharge passage and discharged from the oxidizing gas supply passage to the second reaction unit through the oxidizing gas inlet is discharged from the reaction unit. After contacting with the cathode to contribute to the reaction at the cathode, flows out from the oxidant gas outlet to the oxidant discharge passage and is discharged. During this reaction, a potential difference is generated between the anode and the cathode to generate power.

[0005]

In this type of stacked fuel cell, it is required to increase the power generation efficiency and reduce the size, and the efficiency of the electrochemical reaction generated between the anode and the cathode is required. In order to increase the power generation efficiency and increase the power generation efficiency, each reaction gas is made uniform so that the flows of the fuel gas and the oxidizing gas (hereinafter, these may be collectively referred to as reaction gas) in each reaction section of each cell become uniform. Attempts have been made to supply. JP-A-4-355061,
Also, this attempt has been made in the fuel cell disclosed in Japanese Patent Application Laid-Open No. 8-124592.

In the fuel cell disclosed in the former publication, the area of the fuel gas inlet of each unit cell is gradually reduced from the inlet side of the fuel gas supply path, and the oxidizing gas inlet of each unit cell is reduced. The area of the opening is gradually reduced from the outlet side of the oxidizing gas supply passage so as to equalize the amount of each reaction gas flowing into each reaction section of each cell.

In the fuel cell having such a configuration, the components of each unit cell are different from each other in the stacking direction, which increases the cost of the mold for forming each component. Also, in each reaction section of each cell, each reaction gas flows differently in each reaction section due to the difference in shape in the stacking direction, and depending on the cell, each reaction gas flows in each reaction section. It becomes a skewed flow and causes a decrease in power generation efficiency.

On the other hand, in the fuel cell disclosed in the latter publication, in order to make the flow of each reaction gas uniform in each reaction section in each cell, the reaction gas is supplied to the inflow section and the outflow section of each reaction gas. A rectifying plate is provided, and a structure for diffusing the flow of each reaction gas is provided. Such a configuration is effective in increasing the power generation efficiency, but increases the manufacturing cost and causes a new problem that the structure becomes complicated and the flow path resistance of each reaction gas increases.

Accordingly, an object of the present invention is to provide a fuel cell of this type which can supply each reaction gas in such a manner that the flow of each reaction gas in each reaction section of each cell is uniform. Another object of the present invention is to provide a simple configuration to suppress an increase in cost.

[0010]

The present invention relates to a stacked fuel cell, and more particularly to an electrolyte membrane, an anode located on one side of the electrolyte membrane, a cathode located on the other side of the electrolyte membrane, and a fuel cell. A first partition portion that is located at a portion of the anode opposite to the electrolyte membrane to form a first reaction portion to which fuel gas is supplied, and a portion of the cathode that is located at a portion opposite to the electrolyte membrane; A second cell having a second partition portion forming a second reaction portion to which an oxidizing gas is supplied, and a stack of unit cells each including a fuel gas and an oxidizing gas as a reactive gas, A fuel gas supply path and a fuel gas discharge path extending in the stacking direction of the unit cells and supplying and discharging fuel gas to and from the first reaction unit, and oxidizing the second reaction unit in the stacking direction of the unit cells and An oxidizing gas supply path for supplying and discharging oxidizing gas and an oxidizing gas discharge path The fuel cell comprising Te is to be subject.

Thus, the first fuel cell according to the present invention is the fuel cell of the above-mentioned type, wherein the distance between the reaction gas inlet of the supply path of the reaction gas and the reaction section, the reaction section and the reaction section, The distance between the reaction gas outlets of the reaction gas discharge path is
It is characterized by being different from each other. Further, the second fuel cell according to the present invention is the fuel cell of the above-mentioned type, wherein a guide area extending from a reaction gas inlet of the supply path of the reaction gas to the space between the reaction parts, And a guide area leading to a reaction gas outlet of the discharge path is different from each other.

A third fuel cell according to the present invention is the fuel cell of the above-mentioned type, wherein the shape of the reactant gas inlet of the reactant gas supply passage and the reactant gas outlet of the reactant gas discharge passage are provided. Are different from each other. In these fuel cells according to the present invention,
The reactant gas inlet and the reactant gas outlet may be triangular, and may be gradually narrowed from the widthwise front end of the reaction part to the center part of the reaction part.

[0013]

According to the fuel cell of the present invention,
The flow of the reaction gas in each reaction section is determined by the distance between each reaction gas inlet and each reaction gas outlet with respect to each reaction section, the positional relationship such as the guide area of each reaction gas, or the flow of each reaction gas through each reaction gas inlet and each reaction gas. It is set uniformly based on the shape relationship of the outlet. For this reason, the distance between each reaction gas inlet and each reaction gas outlet with respect to each reaction part in each cell, the guide area, the relationship such as the shape, etc., is appropriately changed, so that each reaction part of each cell can be easily changed. Each reaction gas can be supplied so that the flow of each reaction gas becomes uniform.

As a result, the reaction efficiency of the electrochemical reaction of each unit cell can be increased, and the power generation efficiency of the fuel cell can be increased. As a result, the size of the fuel cell can be reduced. In this case, since the stacked unit cells are formed in the same shape as each other, the cost of the mold does not increase.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 3 schematically show different cross sections of the fuel cell according to the first embodiment of the present invention. The fuel cell is located on one side of the polymer electrolyte membrane 11 and the electrolyte membrane 11. Anode 12, a cathode 13 located on the other side of the electrolyte membrane 11, and a first reaction section A to which a fuel gas is supplied at a location of the anode 12 opposite to the electrolyte membrane 11.
And a second partition portion 15 which is located at a portion of the cathode 13 opposite to the electrolyte membrane 11 and forms a second reaction portion B to which an oxidizing gas is supplied. A plurality of unit cells are formed by laminating each other.

In the fuel cell, the anode 12 and the cathode 13 are reaction electrode layers provided with a catalyst layer,
A first spacer 16 interposed between the electrolyte membrane 11 and the first partition 14 is formed in the first reaction section A including the anode 12 between the first and second partitions 11, 14, and between the electrolyte membrane 11 and the second partition 15. The second reaction portion B including the cathode 13 between the two 11 and 15 by the second spacer 17 interposed
And a third spacer 18 interposed between the second partition 15 and the first partition 14.
A cooling water passage C is formed between the four.

FIGS. 1 to 3 show cross sections of different parts of the fuel cell. In the fuel cell, as shown in FIGS. A path D1 and a fuel gas discharge path D2;
An oxidizing gas supply passage E1 and an oxidizing gas discharge passage E2;
A cooling water supply path F1 and a cooling water discharge path F2 are formed.

FIG. 4 is a front view of the inside of the first partition wall 14, FIG. 5 is a front view of the inside of the second partition wall 15, and FIG. However, FIGS. 5 and 6
Are the fuel gas inlet 19a and the fuel gas outlet 19
b, oxidant gas inlet 20a and oxidant gas outlet 2
0b, cooling water inlet 21a and cooling water outlet 21b
Are displayed in the same direction as in FIG.

The first partition 14 and the second partition 15 are
An innumerable uneven stripe extending in the longitudinal direction is formed in the central portions 14a and 15a on the inner surface.
15a, a fuel gas inlet 19a,
An oxidizing gas outlet 20b and a cooling water inlet 21a are formed, and a fuel gas outlet 19b, an oxidizing gas inlet 20a, and a cooling water outlet 21b are provided below the central portions 14a and 15a. Are formed.
The fuel gas inlet 19a and the outlet 19b, the oxidizing gas inlet 20a and the outlet 20b have a substantially triangular shape.

Thus, the fuel gas inlet 19a and the oxidizing gas inlet 20
a has the same shape and a large opening area, the fuel gas outlet 19b and the oxidizing gas outlet 20b have the same shape and a small opening area, and the cooling water inlet 21a and the cooling water outlet 21b have the same shape. . Further, the distance between the fuel gas inlet 19a and the first reaction part A is shorter than the distance between the first reaction part A and the fuel gas outlet 19b, and the oxidant gas inlet 20a and the second reaction part B The distance between them is shorter than the distance between the second reaction part B and the oxidant gas outlet 20b.

Further, the guide area of the guide passage 19c from the fuel gas inlet 19a to the first reaction section A and the guide passage 19d from the first reaction section A to the fuel gas outlet 19b.
Is formed in the same size as the guide area of the guide flow path 20c from the oxidant gas inlet 20a to the second reaction part B, and from the second reaction part B to the oxidant gas outlet 20b. The guide passage 20d is formed to have the same size as the guide area.

Therefore, the fuel cell is the first fuel cell according to the present invention.
In the fuel cell, as shown in FIG. 4, a first spacer 16 interposed between the electrolyte membrane 11 and the first partition 14 is provided with a central portion 15a. 1st reaction part A corresponding to each inflow port 19a,
20a, 21a and the outlets 19b, 20b, 21b are defined. In the first partition part 14, the fuel gas inlet 19a and the fuel gas outlet 19b are connected to the respective guide passages 19a.
It communicates with the first reaction section A via c and 19d.

The fuel gas is supplied from the fuel gas supply passage D1 to the first reaction section A through the fuel gas inlet 19a, as shown by the arrow in the figure, and from the first reaction section A to the fuel gas outlet 19b through the fuel gas outlet 19b. The gas is discharged to the gas discharge path D2. In the fuel cell, FIG.
As shown in (2), the second spacer 17 interposed between the electrolyte membrane 11 and the second partition wall 15 includes a first reaction portion B corresponding to the central portion 15a, respective inlets 19a, 20a, 21a, and respective outlets. 19b, 20b, and 21b are defined. In the second partition wall 15, the oxidizing gas inlet 20a and the oxidizing gas outlet 20b communicate with the second reaction section B via the guide flow paths 20c and 20d. Let me.

The oxidizing gas is supplied from the oxidizing gas supply passage E1 through the oxidizing gas inlet 20a to the second
While being supplied to the reaction section B, it is discharged from the second reaction section B to the oxidant gas discharge path E2 via the oxidant outlet 20b. In the fuel cell,
As shown in FIG. 6, the third spacer 18 interposed between the second partition 15 and the first partition 14 is provided with each of the inlets 19a,
The cooling water passage C is defined by partitioning the outlets 19a, 21a, and the outlets 19b, 20b, 21b, and the cooling water passage C is communicated with the cooling water inlet 21a and the cooling water outlet 21b.

The cooling water is supplied from the cooling water supply passage F1 to the cooling water passage C through the cooling water inlet 21a as shown by the arrow in the drawing.
And discharged from the cooling water passage C to the cooling water discharge passage F2 via the cooling water outlet 21b. FIG. 7 schematically shows the two partition walls 22 and 23 constituting the fuel cell of the comparative example integrally.
4 and 5 correspond to a front view integrally displayed.
The opening areas of the fuel gas inlet 24a, the fuel gas outlet 24b, the oxidizing gas inlet 25a, and the oxidizing gas outlet 25b are all the same in both partition portions 22 and 23 constituting the fuel cell of this comparative example. Is formed.

In the fuel cell according to the first embodiment of the present invention, first, the fuel gas inlet 19a and the oxidizing gas inlet 20a are connected to the fuel gas outlet 19b and the oxidizing gas outlet 20b. By having different shapes having a difference in opening area between them, the flow of the fuel gas and the oxidizing gas can be uniformly guided to the reaction sections A and B without being biased toward the center and each end thereof. Can be.

In particular, during high load operation of the fuel cell, when the gas flow rate flowing into the fuel cell increases, the passage resistance of the reaction sections A and B becomes large, and the flow of the fuel gas and the oxidizing gas becomes closer to the inlet side. If the fuel gas outlet 19b and the oxidant gas outlet 20b are more skewed toward the opposite side, the opening areas of the fuel gas outlet 19b and the oxidant gas
By making the opening area smaller than 0a, the flow rate on the more skewed side can be suppressed.

Second, in the fuel cell,
In the case of a high-load operation in which the fuel gas inlet 19a and the oxidizing gas inlet 20a are located close to the reaction sections A and B to increase the gas flow rate of each reaction gas, the reaction sections A and B are subdivided. In the case where the reaction passage is further promoted by reducing the width of the passage, it is possible to prevent the flow of each reaction gas downstream of the inlet from being weakened.
The flow of the reaction gas in B can be made uniform.

Further, in the fuel cell, since all the first partition portions 14 and all the second partition portions 15 are formed in the same shape, the first partition portion 14 and the second partition portion 15 are formed. In order to form the fuel cell, two types of dedicated types may be used, and a large number of types of dedicated types such as the former conventional fuel cell described above are unnecessary, and an increase in the cost of the mold due to the many types of dedicated types. There is no. Further, there is no variation in the performance between the first partition portions 14 and between the second partition portions 15, and the cause of the decrease in the power generation efficiency can be eliminated.

The graph shown in FIG. 8 shows the flow rate distribution of each reaction gas in the reaction sections A and B in the fuel cell and the fuel cell of the comparative example (FIG. 7).
In the fuel cell, compared to the fuel cell of the comparative example,
It is confirmed that the flow velocity distribution is more uniform. Note that the flow velocity ratio shown in the figure is a value obtained by taking the ratio of the maximum flow velocity to the minimum flow velocity. The horizontal axis represents the lateral portions of the reaction parts A and B, and the vertical axis represents the magnitude of the flow velocity (m / m). sec).

Next, a plurality of embodiments of the fuel cell according to the present invention will be described with reference to FIGS. Each of these drawings corresponds to a front view in which FIGS. 4 and 5 are integrally displayed. FIG. 9 shows a second embodiment of the fuel cell according to the present invention. In each of the partition walls 14 and 15 constituting the fuel cell, the fuel gas inlet 1 is provided.
9a, fuel gas outlet 19b, oxidant gas inlet 20
a, the oxidizing gas outflow / inlet 20b are all formed in the same opening area, but with respect to the positional relationship with the reaction parts A and B, the fuel gas inlet 19a and the oxidizing gas inflow 20
a is located at a far site, and the fuel gas outlet 19b and the oxidizing gas outlet 20b are located at a near site. Therefore, the fuel cell corresponds to the first fuel cell according to the present invention.

In the fuel cell of the third embodiment shown in FIG. 10, the fuel gas inlet 19a and the fuel gas outlet 19
b, oxidant gas inlet 20a, oxidant gas outlet 20b
Are all formed in the same opening area,
Regarding the positional relationship with B, the fuel gas inlet 19a and the oxidizing gas inlet 20a are located at a position near, and the fuel gas outlet 19b and the oxidizing gas outlet 20b are located at a position far from each other. Therefore, the fuel cell corresponds to the first fuel cell according to the present invention.

The flow of each reaction gas can be uniformly guided to the reaction sections A and B by the positional relationship between the inlets 19a and 20a and the outlets 19b and 20b of each reaction gas. Particularly, as in the fuel cell according to the third embodiment shown in FIG. 10, the fuel gas inlet 19a and the oxidizing gas inlet 2
In the embodiment where Oa is located at a position near the reaction sections A and B, in the case of a high load operation in which the gas flow rate of each reaction gas is increased, the width of the subdivided passages of the reaction sections A and B is reduced to perform the reaction. In the case where the reaction gas is further promoted, it is possible to prevent the flow of each reaction gas downstream of the inlet from being weakened, and to make the flow of the reaction gas in the reaction sections A and B uniform.

FIG. 11 shows a fourth embodiment of the fuel cell according to the present invention. In the fuel cell, the spacers 16 and 17 are arranged so as to be deviated upward in the drawing, and the reaction sections A and B is formed on the lower side, and as a result, the fuel gas inlet 19a and the oxidizing gas outlet 20b formed in each of the partition walls 14 and 15 are located far from the reaction sections A and B. And the guide channel 19c
Is made larger than the guide area of the guide flow path 19d.

Similarly, the oxidizing gas inlet 20a and the fuel gas outlet 19b are located at positions close to the reaction sections A and B, and the guide area of the guide passage 20c is adjusted to the guide passage 20d.
Is smaller than the guide area. In this case, the fuel gas inlet 19a, the fuel gas outlet 19b, the oxidizing gas inlet 20a, and the oxidizing gas outlet 20b are all formed in the same opening area. In addition, the reaction parts A and B themselves may be deviated in the vertical direction in the drawing, so that the positional relationship between the inflow and outflow ports of the respective reaction gases may be the same or opposite. Therefore, the fuel cell corresponds to the first and second fuel cells according to the present invention.

FIG. 12 shows a fifth embodiment of the fuel cell according to the present invention. In this fuel cell, the reaction sections A and B are formed so as to be deviated downward, and as a result, The fuel gas inlet 19a and the oxidizing gas outlet 20b formed in the partition portions 14 and 15 are located at locations far from the reaction parts A and B, and the oxidizing gas inlet 20a and the fuel gas outlet 19b Are located near the reaction sections A and B. In addition, the opening areas of the fuel gas inlet 19a and the oxidizing gas outlet 20b are large, and the fuel gas outlet 19b and the oxidizing gas The opening area of the inflow port 20a is formed small.

The fuel cell includes the first and second fuel cells according to the present invention.
And the third fuel cell. In this fuel cell, it is intended to exhibit both the effect of the opening area of the inflow / outlet of each reaction gas and the positional effect between the reaction parts A and B. I have. FIG. 13 shows a sixth embodiment of the fuel cell according to the present invention.
In each of the partitions 14 and 15 constituting the fuel cell, a reaction of a fuel gas inlet 19a, a fuel gas outlet 19b, an oxidizing gas inlet 20a, and an oxidizing gas outlet 20b is performed. The positional relationship with respect to the parts A and B is the same, the opening areas of the fuel gas inlet 19a and the oxidizing gas inlet 20a, and the opening areas of the fuel gas outlet 19b and the oxidizing gas outlet 20b are the same, and The guide areas of the respective guide channels 19c and 19d and the respective guide channels 20c and 20d are the same.

However, the opening areas of the fuel gas inlet 19a and the oxidizing gas inlet 20a are equal to the fuel gas outlet 19b.
And it is formed larger than the opening area of the oxidizing gas outlet 20b, and has a different shape. Therefore, the fuel cell corresponds to the third fuel cell according to the present invention.
In the fuel cell, the fuel gas inlet 19a and the oxidizing gas outlet 20a and the fuel gas outlet 19b and the oxidizing gas outlet 20b are formed in different shapes so as to have a difference in opening area. The flow of the fuel gas and the oxidizing gas can be uniformly guided to the reaction sections A and B without being biased toward the center and each end. In particular, when the fuel cell is operated under a high load, when the gas flow rate flowing in the fuel cell increases, the passage resistance of the reaction sections A and B increases, and the flow of the fuel gas and the oxidizing gas is opposite to the flow inlet side. In this case, the opening areas of the fuel gas outlet 19b and the oxidizing gas outlet 20b are made smaller than the opening areas of the fuel gas inlet 19a and the oxidizing gas inlet 20a. The flow rate can be suppressed.

FIG. 14 shows a seventh embodiment of the fuel cell according to the present invention. In each of the partition walls 14 and 15 constituting the fuel cell, a fuel gas inlet 19a and an oxidant gas outlet are provided. The oxidant gas inlet 20a and the fuel gas outlet 19b have the same opening area, and the fuel gas inlet 19a and the oxidant gas outlet 20b have the same opening area. The gas inlet 20a and the fuel gas outlet 19b are formed to be larger than the opening areas of the fuel gas outlet 20b, and the other configuration is the same as that of the fuel cell according to the sixth embodiment shown in FIG. Therefore, the fuel cell corresponds to the third fuel cell according to the present invention, and has the same operation and effect as the fuel cell of the sixth embodiment.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a first embodiment of a fuel cell according to the present invention.

FIG. 2 is a partial cross-sectional view corresponding to FIG. 1, showing a cross-section of a different portion of the embodiment.

FIG. 3 is a partial cross-sectional view corresponding to FIG. 1, showing a cross-section of a further different portion of the embodiment.

FIG. 4 is an inside front view of a first partition wall of the fuel cell according to the embodiment.

FIG. 5 is an inside front view of a second partition wall constituting the fuel cell according to the embodiment.

FIG. 6 is an outside front view of a second partition wall constituting the fuel cell of the embodiment.

FIG. 7 is an inside front view in which both partition portions constituting a conventional fuel cell are integrated.

FIG. 8 is a graph showing flow velocity distribution characteristics of the fuel cell of the embodiment and a conventional fuel cell.

FIG. 9 is an inner front view of a fuel cell according to a second embodiment of the present invention, in which both partition portions are integrated.

FIG. 10 is an inside front view in which both partition portions constituting the third embodiment are integrated.

FIG. 11 is an inside front view in which both partition walls constituting the fourth embodiment are integrated.

FIG. 12 is an inside front view in which both partition portions constituting the fifth embodiment are integrated.

FIG. 13 is an inside front view in which both partition portions constituting the sixth embodiment are integrated.

FIG. 14 is an inside front view in which both partition walls constituting the seventh embodiment are integrated.

[Explanation of symbols]

11: electrolyte membrane, 12: anode, 13: cathode, 1
4 First partition part, 15 Second partition part, 16 First spacer, 17 Second spacer, 18 Third spacer, 19a
... fuel gas inlet, 19b ... fuel gas outlet, 19c,
19d: guide channel, 20a: oxidant gas inlet, 20b
... Oxidant gas outlet, 20c, 20d ... Guide channel, 21
a: Cooling water inlet, 21b ... Cooling water outlet, 22, 23
... partition wall part, 24a ... fuel gas inlet, 24b ... fuel gas outlet, 25a ... oxidant gas inlet, 25b ... oxidant gas outlet, A ... first reaction part, B ... second reaction part, C ... Cooling water flow path, D1: fuel gas supply path, D2: fuel gas discharge path, E1: oxidizing gas supply path, E2: oxidizing gas discharge path, F1: cooling water supply path, F2: cooling water discharge path.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kiyoshi Kawaguchi 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. F-term (reference) 5H026 AA06 CC08 HH02 HH03

Claims (4)

[Claims] 1. An electrolyte membrane, an anode located on one side of the electrolyte membrane, a cathode located on the other side of the electrolyte membrane, and a fuel located on a side of the anode opposite to the electrolyte membrane. Forming a first partition portion forming a first reaction portion to which gas is supplied, and forming a second reaction portion to which an oxidizing gas is supplied at a position of the cathode opposite to the electrolyte membrane; A stacked body comprising a plurality of unit cells, each having a second partition wall and having the fuel gas and the oxidizing gas as a reaction gas, the unit cells extending in the stacking direction of the unit cells, and Gas supply path and fuel gas discharge path for supplying and discharging fuel gas to and from the reactor, and an oxidant gas supply path extending in the stacking direction of the unit cells and supplying and discharging oxidant gas to and from the second reaction section. In a fuel cell provided with a gas discharge path, the reaction gas supply path The distance between the gas inlet and the reaction unit, the fuel cell and the distance between the reactive gas flow outlet of the discharge passage of the reaction portion and the reaction gas, and being different from each other. 2. An electrolyte membrane, an anode located on one side of the electrolyte membrane, a cathode located on the other side of the electrolyte membrane, and a fuel located on a side of the anode opposite to the electrolyte membrane. Forming a first partition portion forming a first reaction portion to which gas is supplied, and forming a second reaction portion to which an oxidizing gas is supplied at a position of the cathode opposite to the electrolyte membrane; A stacked body comprising a plurality of unit cells, each having a second partition wall and having the fuel gas and the oxidizing gas as a reaction gas, the unit cells extending in the stacking direction of the unit cells, and Gas supply path and fuel gas discharge path for supplying and discharging fuel gas to and from the unit, and an oxidant gas supply path and an oxidant extending in the stacking direction of the unit cells and supplying and discharging oxidant gas to and from the second reaction unit In a fuel cell provided with a gas discharge path, the reaction gas supply path A fuel cell and a guide area from the gas inlet leads between the reaction unit, and a guide area extending from the reaction section to a reaction gas outlet of the discharge passage of the reaction gas, and being different from each other. 3. An electrolyte membrane, an anode located on one side of the electrolyte membrane, a cathode located on the other side of the electrolyte membrane, and a fuel located on a side of the anode opposite to the electrolyte membrane. Forming a first partition portion forming a first reaction portion to which gas is supplied, and forming a second reaction portion to which an oxidizing gas is supplied at a position of the cathode opposite to the electrolyte membrane; A stacked body comprising a plurality of unit cells, each having a second partition wall and having the fuel gas and the oxidizing gas as a reaction gas, the unit cells extending in the stacking direction of the unit cells, and Gas supply path and fuel gas discharge path for supplying and discharging fuel gas to and from the unit, and an oxidant gas supply path and an oxidant extending in the stacking direction of the unit cells and supplying and discharging oxidant gas to and from the second reaction unit In a fuel cell provided with a gas discharge path, the reaction gas supply path Fuel cell and the gas inlet of the shape, and the shape of the reaction gas outlet of the discharge passage of the reaction gas, and being different from each other. 4. The fuel cell according to claim 1, wherein the reactant gas inlet and the reactant gas outlet have a triangular shape, and are arranged at a center of the reactor from a widthwise front end of the reactor. A fuel cell characterized in that the width is gradually narrowed toward the side of the fuel cell.