JP2020038773A - Electrochemical cell stack, fuel cell and hydrogen manufacturing device - Google Patents

Abstract

To provide an electrochemical cell stack capable of reducing eccentricity of a fuel gas or air supplied to each of cells without changing an installation area, a fuel cell and an electrolysis device.SOLUTION: An electrochemical cell stack comprises: a laminate in which cells and separators are alternately laminated and in which a side face of the cell is enclosed by the separator; a manifold disposed on an end face of the laminate and including a fuel introduction part for introducing a fuel gas from the outside and an air introduction part for introducing air from the outside; a fuel supply channel which is a channel for the fuel gas to be supplied to the cells and extends from the fuel introduction part through the separators in a lamination direction of the separators; and an air supply channel which is a channel for the air to be supplied to the cells and extends from the air introduction parts through the separators in a lamination direction of the separators. The cells form multiple cell groups in its lamination direction and at least any one of the fuel supply channel and the air supply channel is provided for each of the cell groups.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to an electrochemical cell stack, a fuel cell, and a hydrogen production device.

  An electrochemical cell (hereinafter, referred to as a cell), which is a minimum structural unit of a flat plate type solid oxide fuel cell (SOFC) and a solid oxide electrolytic cell (SOEC), includes a fuel electrode, an electrolyte, and an air electrode. It is formed by sequentially laminating. When this cell is mounted on an SOFC, fuel gas (hydrogen or carbon monoxide) is supplied to the fuel electrode and air is supplied to the air electrode from the outside, and an electrochemical reaction occurs in the cell. As a result, electrical energy is generated in the cell. On the other hand, when this cell is mounted on the SOEC, fuel gas (water vapor) is supplied to the fuel electrode from the outside, and electric energy is supplied to the cell from the outside, and the water vapor is electrolyzed into oxygen and hydrogen in the cell. I do.

  A flat-type electrochemical cell stack (hereinafter, referred to as a cell stack) is a stacked body in which cells and separators are alternately stacked, and a manifold for guiding fuel gas and air from outside is provided adjacent to the cell stack. Can be The manifold is arranged, for example, on the upper and lower end surfaces in the stacking direction of the cell stack and on the side surfaces of the cell stack. The separator is provided with a fuel supply hole and an air supply hole penetrating in the stacking direction, a fuel supply lateral hole connected to the fuel supply hole, and an air supply lateral hole connected to the air supply hole. The fuel supply hole and the air supply hole form flow paths extending in the stacking direction of the stack. The fuel supply lateral hole connects the fuel supply hole and the fuel electrode of each cell to form a fuel gas flow path together with the fuel supply hole. The air supply lateral hole connects the air supply hole and the air electrode of each cell to form an air flow path together with the air supply hole.

  That is, the fuel gas guided from the outside to the manifold is supplied to the fuel electrode through the fuel supply hole and the fuel supply lateral hole sequentially. When the cell stack is mounted on the SOFC, air guided from the outside to the manifold is supplied to the air electrode through the air supply hole and the air supply lateral hole in order.

JP-A-2006-81813

  By the way, in order to increase the amount of electric energy generated in the SOFC and the amount of oxygen and hydrogen generated in the SOEC (hereinafter, these are collectively referred to as a large cell stack), it is necessary to integrate a plurality of cell stacks. It is necessary to increase the number of cells stacked in one cell stack. Among them, when a plurality of cell stacks are integrated, a large space is required for the installation because the cell stacks are integrated in a direction orthogonal to the stacking direction. Therefore, in order to realize a cell stack that does not depend on the installation space and has a large capacity, it is required to increase the number of cells stacked inside one cell stack.

  However, as the number of cells stacked in one cell stack increases, the amount of fuel gas or air supplied increases as the cells are closer to the manifold, causing a bias in the stacking direction. If the supply amount of fuel gas or air is biased, there will be a difference in the reaction amount in each cell, so local thermal stress is applied to the cell with the larger reaction amount (cell closer to the manifold), and the cell stack It may cause performance degradation.

  Therefore, an object to be solved by the present invention is to provide an electrochemical cell stack, a fuel cell, and a hydrogen production device that can reduce the deviation of fuel gas and air supplied to each cell without changing the installation area. .

  In order to solve the above-described problems, the electrochemical cell stack of the embodiment has a stacked body in which cells and separators are alternately stacked, and a side surface of the cell is surrounded by the separator, and an end surface of the stacked body. And a manifold provided with a fuel introduction unit for introducing a fuel gas from outside and an air introduction unit for introducing air from outside, and a flow path of fuel gas supplied to the cell, wherein the fuel introduction unit A fuel supply passage extending through the separator in the stacking direction, and a flow passage of air supplied to the cells, wherein the air supply passage extends through the separator from the air introduction portion in the stacking direction. And a flow path, wherein the cell forms a plurality of cell groups in the stacking direction, and at least one of the fuel supply flow path and the air supply flow path is provided for each of the cell groups. It is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the bias of the fuel gas and air supplied to each cell can be reduced, without changing an installation area.

FIG. 2 is a diagram illustrating a configuration of a cell stack according to the first embodiment. It is the figure which expanded a part of FIG. It is sectional drawing of FIG. 1, Comprising: (a) sectional drawing of PP, (b) sectional drawing of QQ is shown, respectively. It is a figure showing the composition of the cell stack concerning the modification of a first embodiment. FIG. 11 is a diagram illustrating a configuration of a cell stack according to another modification of the first embodiment. It is a figure showing the composition of the cell stack concerning a second embodiment. It is a figure showing the composition of the cell stack concerning the modification of a second embodiment. FIG. 15 is a diagram illustrating a configuration of a cell stack according to another modification of the second embodiment.

(First embodiment)
The electrochemical cell stack according to the first embodiment will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating a configuration of a cell stack according to the first embodiment, and FIG. 2 is an enlarged view of a part of FIG. FIG. 3 is a cross-sectional view of FIG. 1, showing (a) a cross-sectional view taken along the line PP and (b) a cross-sectional view taken along the line QQ. In the following description, an electrochemical cell is described as a cell, and an electrochemical cell stack is described as a cell stack.

  As shown in FIGS. 1 and 3, the cell stack 1 includes a laminate 10, a manifold 20, a fuel supply passage 30, an air supply passage 35, a fuel discharge passage 40, and an air discharge passage 45. And In the following description, the direction in which the cells 11 and the separators 12 to be described later are stacked is referred to as a stacking direction (z direction), and the direction and a specific surface are described based on the stacking direction. For example, the upper surface indicates the upper surface based on the laminating direction, the side surface indicates the side surface based on the laminating direction, and the lower side indicates the lower side based on the laminating direction. Note that the stacking direction here does not always match the direction of gravity.

  As shown in FIG. 2, the laminate 10 includes a cell 11, a separator 12, a sealing plate 13, and a sealing material 14. The term “laminate 10” as used herein refers to a unit in which a separator 12, in which cells 11 are arranged, a sealing plate 13, and a sealing material 14 are sequentially arranged as one unit, and refers to an entire laminate in which a plurality of these units are stacked.

  The cell 11 is a flat cell in which a fuel electrode 11a, an electrolyte 11b, and an air electrode 11c are sequentially stacked. The cell 11 supplies a fuel gas to a fuel chamber 15 described below and air to an air chamber 16 described later to cause a chemical reaction. Here, the chemical reaction refers to a reaction that generates electric energy (power generation reaction) when used as an SOFC, and an electrolysis reaction when used as an SOEC. The fuel gas is, for example, hydrogen or carbon monoxide when used for SOFC, and water vapor when used for SOEC.

  The separator 12 is a plate-shaped member arranged so as to surround the side surface of the cell 11 and has conductivity. In the present embodiment, the separator 12 is arranged so as to surround the cell 11 with a predetermined gap from the side surface of the cell 11. That is, on the upper surface of the separator 12, a cell accommodating portion 12a recessed downward from this surface is provided, and the cell 11 is arranged inside the cell accommodating portion 12a. However, surrounding the side surface of the cell 11 is not limited to the case where the side surface of the cell 11 and the cell accommodating portion 12a of the separator 12 are provided with a predetermined gap therebetween. It may be adjacent to the inner peripheral surface of the portion 12a.

  The sealing plate 13 is a plate-shaped member having conductivity, and is provided on the upper surface of the separator 12. More specifically, the sealing plate 13 has an opening at least in the center thereof, and when viewed from the upper surface of the sealing plate 13, the separator 12 is formed so that the upper surface of the cell 11 can be seen through the opening. It is arranged on the upper surface.

  The sealing member 14 is a plate-shaped member having conductivity. The sealing material 14 is arranged on the upper surface of the sealing plate 13.

  In each unit constituting the stacked body 10, a fuel chamber 15 is provided between the cell accommodating portion 12a and the sealing plate 13, and a fuel gas is supplied to the fuel chamber 15. Further, an air chamber 16 is provided between the opening of the sealing plate 13, the sealing material 14, and another unit of the separator 12 in contact with the sealing material 14, and air is supplied to the air chamber 16.

  The manifold 20 is provided on the lower end surface of the stacked body 10 and has a fuel introduction part 20a for introducing a fuel gas from outside and an air introduction part 20b (not shown) for introducing air. In the present embodiment, the case where the fuel introduction section 20a and the air introduction section 20b are provided in the same manifold 20 will be described as an example. However, even if the fuel introduction section 20a and the air introduction section 20b are provided in separate manifolds. Good.

  The fuel supply passage 30 includes two fuel supply holes 31a and 31b extending from the fuel introduction portion 20a along the stacking direction, and one of the fuel supply holes 31a or 31b and the fuel chamber 15 provided in each unit. It is a flow path on the fuel gas supply side including a fuel supply lateral hole 32 to be connected.

  Here, the fuel supply channel 30 will be described in more detail with reference to FIGS. In addition, in the following description, the upper side and the lower side in the inside of the laminated body 10 shall represent the installation position of each unit relatively. For example, when the electrochemical cell stack 1 is formed by stacking 41 units in total, 20 units counted from the upper end in the stacking direction are the upper side of the inside of the stacked body 10, and the remaining 21 units are counted out of the inside of the stacked body 10. The lower side.

  As shown in FIGS. 2 and 3A, on the lower side of the inside of the laminated body 10, the separators constituting each unit are located outside the side surface of the cell 11 (radially outside centered on the z-axis). 12, fuel supply holes 31a and 31b extending in the stacking direction through the edges of the sealing plate 13 and the sealing material 14, respectively. The fuel supply holes 31a provided in each of the separators 12 are adjacent to each other in the stacking direction and constitute one flow path extending in the stacking direction. Similarly to the fuel supply holes 31a, the fuel supply holes 31b provided in the respective separators 12 are adjacent to each other in the stacking direction and constitute one flow path extending in the stacking direction. These two flow paths are respectively provided on the lower side of the inside of the laminate 10, and the fuel supply hole 31 a is connected to the fuel supply lateral hole 32 and located on the lower side of the inside of the laminate 10. A flow path for supplying a fuel gas to each fuel chamber 15 is configured. The fuel supply hole 31b is not connected to the lower fuel supply lateral hole 32 in the inside of the stacked body 10.

  On the other hand, as shown in FIGS. 2 and 3B, a fuel supply hole 31 b extending from the lower side of the stacked body 10 is provided on the upper side of the inside of the stacked body 10. That is, the fuel supply holes 31b provided in the respective separators 12 are connected to the lower fuel supply holes 31b in the inside of the stack 10 to form one flow path extending from the fuel introduction portion 20a in the stacking direction. I do. The fuel supply holes 31b are connected to the fuel supply lateral holes 32, and constitute flow paths for supplying the fuel gas to the respective fuel chambers 15 located above the stacked body 10.

  The cross-sectional area of the fuel supply holes 31a and 31b in the cross section perpendicular to the stacking direction is designed so that the deviation of the flow rate of the fuel gas flowing between the upper side and the lower side in the inside of the stacked body 10 becomes small. I have. The phrase “the deviation of the flow rate of the fuel gas is small” means that the fuel gas does not locally flow in a part of the laminate 10, and includes the case where the flow rate inside the laminate 10 becomes uniform. It is.

  As shown in FIG. 3, the air supply channel 35 is provided in each unit with two air supply holes 36a and 36b extending from the air introduction part 20b along the stacking direction, and one of the air supply holes. An air supply side flow path including an air supply lateral hole 37 connecting the air chamber 16. The air supply channel 35 is disposed at a position that does not contact the fuel supply channel 30 when viewed from a cross section (PP cross section and QQ cross section) perpendicular to the stacking direction. Other structures of the air supply channel are the same as those of the fuel supply channel 30.

  The fuel discharge channel 40 is provided on the side of the separator 12 that faces the fuel supply channel 30 with the cell accommodating portion 12a as a boundary, and extends along the stacking direction. A fuel discharge lateral hole 42 for connecting the fuel chambers 15 provided in the unit is provided. The fuel outlet 41 is connected to a fuel outlet 43 provided in the manifold 20 separately from the fuel introduction part 20a.

  The air discharge channel 45 is provided on the side of the separator 12 facing the air supply channel 35 with the cell accommodating portion 12a as a boundary, and has an air discharge hole 46 extending along the stacking direction, an air discharge hole, and each unit. An air discharge lateral hole 47 for connecting the air chamber 16 provided therein is provided. The air outlet 46 is connected to an air outlet (not shown) provided separately from the air inlet 20b. The other structure of the air discharge passage is the same as that of the fuel discharge passage 40.

  Next, the operation of the present embodiment will be described. In the following description, a case will be described in which hydrogen is used as a fuel gas when the cell stack 1 is used as an SOFC, and steam is used as a fuel gas when the cell stack 1 is used as an SOEC.

(When operating as SOFC)
Hydrogen (fuel gas) introduced from outside into the fuel introduction portion 20a of the manifold 20 is supplied to the fuel chamber 15 through the fuel supply lateral hole 32 provided in each unit via the fuel supply hole 31a or 31b. . That is, hydrogen is supplied to the fuel chamber 15 from the fuel introduction portion 20a to the fuel chamber 15 through the fuel supply hole 31a and the fuel supply lateral hole 32 sequentially in the lower part of the inside of the laminate 10, and the fuel introduction is performed in the upper part of the laminate 10 inside. Hydrogen is supplied to the fuel chamber 15 from the portion 20a through the fuel supply hole 31b and the fuel supply lateral hole 32 in this order. This hydrogen is used as a reactant in the power generation reaction (reaction generating electric energy) in the cell 11. On the other hand, hydrogen not used for the power generation reaction in the cell 11 is discharged from the fuel outlet 43 to the outside via the fuel discharge lateral hole 42 and the fuel discharge hole 41.

  In addition, the air introduced from the outside into the air introduction portion 20b of the manifold 20 passes through one of the air supply holes 36a and 36b and passes through the air supply lateral hole 37 provided in each unit similarly to hydrogen. It is supplied to the chamber 16. This air is used as a reactant of the power generation reaction in each unit cell 11. On the other hand, the air not used for the power generation reaction in the cell 11 is discharged to the outside through an air discharge port (not shown) through the air discharge lateral hole 47 and the air discharge hole 46.

(When operating as SOEC)
Water vapor (fuel gas) introduced from outside into the fuel introduction section 20a of the manifold 20 is supplied to the fuel chamber 15 through the fuel supply lateral hole 32 provided in each unit via the fuel supply hole 31a or 31b. . That is, on the lower side of the inside of the stack 10, steam is supplied to the fuel chamber 15 from the fuel introduction portion 20 a through the fuel supply hole 31 a and the fuel supply lateral hole 32 sequentially, and on the upper side of the inside of the stack 10, Steam is supplied to the fuel chamber 15 from the portion 20a through the fuel supply hole 31b and the fuel supply lateral hole 32 in this order. This water vapor is used as a reaction product of the electrolysis reaction in the cell 11. On the other hand, water vapor not used for the electrolysis reaction in the cell 11 is discharged to the outside from the fuel discharge port 43 through the fuel discharge lateral hole 42 and the fuel discharge hole 41.

  That is, in the present embodiment, when the upper side and the lower side of the same stacked body 10 are viewed as different cell groups, the fuel supply holes and the air supply holes are provided for each of these cell groups, so that the inside of the stacked body 10 is reduced. The fuel gas and the air can be supplied equally to the upper side and the lower side.

  According to the above-described first embodiment, by providing a plurality of fuel supply holes and a plurality of air supply holes respectively corresponding to the upper side and the lower side in the stacking direction, each cell 11 is provided regardless of the distance between the cell 11 and the manifold 20. The fuel gas and air can be supplied without bias. As a result, in the stacked body 10, the reaction amount of each of the cells 11 in the stacking direction is not biased, and local thermal stress is less likely to be generated. Therefore, even when the number of stacked cells 11 constituting the stacked body 10 is increased, the performance is hardly reduced. Further, since the fuel supply holes 31a and 31b and the air supply holes 36a and 36b are provided by effectively utilizing the existing space, the cell stack 1 may be provided with a new pipe or the like outside the stacked body 10. There is no need to secure the installation space.

  In the present embodiment, the case where the fuel supply passage 30 has two fuel supply holes 31a and 31b and the air supply passage 35 has two air supply holes 36a and 36b has been described as an example. For example, a configuration may be employed in which any one of the fuel supply hole and the air supply hole is plural. That is, a configuration having two fuel supply holes 31a and 31b and one air supply hole, or a configuration having one fuel supply hole and two air supply holes 36a and 36b may be used. The number of fuel supply holes and air supply holes is not limited as long as they are provided in each cell group inside the same stacked body 10. For example, when three cell groups are formed in the same stacked body 10, three fuel supply holes and three air supply holes may be provided, and when four cell groups are formed, the fuel supply holes may be formed. And four air supply holes. Further, in combination with the above-described modification, only one of the fuel supply passage and the air supply passage may be provided in plural and the other may be provided in one. This relationship regarding the number of flow paths also holds in other embodiments described later.

  Further, in the present embodiment, the case where the manifold 20 is installed on the lower end surface of the multilayer body 10 has been described as an example, but the installation position may be arranged on the end surface of the multilayer body 10, for example, May be provided on the end surface of the laminated body 10 or on the side surface of the laminate 10.

  Further, in the present embodiment, the case has been described where the fuel supply holes 31a and 31b and the air supply holes 36a and 36b form a flow path extending in the stacking direction. Is not limited to a linear flow path extending in the stacking direction. For example, as shown in FIG. 4, a structure in which the fuel supply holes 31a and 31b are bent in the stacking direction may be used. In other words, the fuel supply flow path 30 in the present embodiment only needs to have a different flow path for supplying the fuel gas between the upper cell 11 and the lower cell 11 inside the stacked body 10. And 31b need not have a structure extending only in the stacking direction. The relationship regarding the flow path structure is the same in the air supply flow path 35 in the present embodiment.

  Furthermore, in the present embodiment, a side cross section of the stacked body 10 (the direction of FIGS. 1, 2, and 4) indicates that there are a plurality of fuel supply holes 31a, 31b and a plurality of air supply holes 36a, 36b. In view of this, the case where these supply holes do not overlap with each other has been described as an example. However, this arrangement position is not limited as long as the fuel supply flow path 30 and the air supply flow path 35 do not contact each other. For example, they are arranged as shown in FIG. They may overlap.

(Second embodiment)
An electrochemical cell stack according to the second embodiment will be described with reference to FIG. FIG. 6 is a schematic diagram illustrating a configuration of a cell stack according to the second embodiment. Hereinafter, portions different from the first embodiment will be described, and the other portions are the same as those in the first embodiment, are given the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 6, the cell stack 1 includes a laminate 10, a manifold 50, a fuel supply channel 60, an air supply channel 65 (not shown), a fuel exhaust channel 70, and an air exhaust channel 70. A channel 75 (not shown) is provided. In the second embodiment, the fuel supply holes and the air supply holes are arranged differently from the first embodiment.

  The manifold 50 is sandwiched in the middle of the stacked body 10 and includes a fuel introduction unit 50a for introducing a fuel gas from the outside and an air introduction unit 50b (not shown) for introducing air. That is, the cells 11 are provided above and below the manifold 50 in the stacking direction in one stacked body 10. The fuel introduction section 50a is connected to each of the later-described fuel supply holes 61a and 61b, and the air introduction section is connected to each of the two air supply holes described later.

  The fuel supply channel 60 includes fuel supply holes 61a and 61b and a fuel supply lateral hole 62. The fuel supply hole 61a is provided above the fuel introduction part 50a of the manifold 50, and the fuel supply hole 61b is provided below the fuel introduction part 50a of the manifold 50. The fuel supply lateral hole 62 is connected to the fuel chamber 15 of each unit constituting each of the stacked bodies 10. That is, the fuel supply lateral hole 62 above the fuel introduction part 50a is connected to the fuel supply hole 61a, and the fuel supply lateral hole 62 below the fuel introduction part 50a is connected to the fuel supply hole 61b. The cross-sectional area of the fuel supply holes 61a and 61b in a cross section perpendicular to the laminating direction is designed such that the fuel gas is supplied to each of the stacked bodies 10 without bias. Other configurations are the same as those of the fuel supply channel 30 in the first embodiment.

  The air supply passage 65 (not shown) includes two air supply holes 66 a and 66 b and an air supply lateral hole 67. The air supply holes 66a and 66b are provided one by one above and below the air introduction part of the manifold 50. The air supply lateral hole 67 connects the air chamber 16 of each unit constituting the stacked body 10 to one of the air supply holes. That is, the air supply lateral hole 67 above the air introduction part 50b is connected to the air supply hole 66a above the air introduction part 50b, and the air supply lateral hole 67 below the air introduction part 50b is It connects with the air supply hole 66b below the introduction part 50b. The flow path cross-sectional area of each air supply hole in a cross section perpendicular to the laminating direction is designed so that air is supplied evenly to each of the upper and lower stacked bodies 10. Other configurations are the same as those of the air supply channel 35 in the first embodiment.

  The fuel discharge passage 70 has a fuel discharge hole 71a provided above the fuel introduction part 50a, a fuel discharge hole 71b provided below the fuel introduction part 50a, and a fuel discharge lateral hole 72.

  The air discharge passages 75 (not shown) are provided above and below the air introduction portion, respectively, and include an air discharge hole 76 and an air discharge lateral hole 77. Other configurations of the air discharge channel 75 are the same as those of the air discharge channel 45 in the first embodiment.

  That is, in the present embodiment, when the upper side and the lower side of the manifold 50 are viewed as different cell groups, a fuel supply hole and an air supply hole are provided in these cell groups, respectively, and the upper side and the lower side of the manifold 50 are provided. The fuel gas and the air are supplied to the cells 11 on each side without bias.

  According to the above-described second embodiment, the manifold 50 is disposed between the stacked bodies 10, and the fuel supply holes and the air supply holes are provided above and below the manifold 50 in the stacking direction, respectively. The fuel gas and the air can be supplied equally to each of the cells 11 constituting one of the stacked bodies 10. As a result, the reaction amount of each cell 11 is not biased, and the same effect as in the first embodiment can be obtained.

  In the present embodiment, the number (unit number) of the cells 11 located above and below the manifold 50 is not limited as long as the fuel gas and the air are supplied evenly to these cells 11. That is, the fuel supply holes 61a and 61b are designed so that the deviation of the flow rate is small, and the number of units of the cells 11 constituting the upper laminate 10 and the lower laminate 10 is appropriately changed according to this design. Good.

  Further, in the present embodiment, the case where one manifold 50 is provided has been described as an example. However, the number is not limited, and for example, as shown in FIG. It is good also as a structure provided. In addition, by combining this embodiment and the first embodiment, for example, as shown in FIG. 8, a configuration in which a plurality of fuel supply holes and a plurality of air supply holes are respectively provided above and below the manifold 50 is provided. Alternatively, a configuration may be employed in which a plurality of fuel supply holes and air supply holes are provided on one of the upper side and the lower side of the manifold 50, and one fuel supply hole and one air supply hole are provided on the other side.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

1. Cell stack; Laminate, 11. Cell, 11a. Fuel electrode, 11b. Electrolyte, 11c. Air electrode, 12. Separator, 12a. 12. Cell accommodating section; Sealing plate, 13a. Opening, 14. 14. sealing material; Fuel chamber, 16; Air chamber, 20, 50. Manifold, 20a, 50a. Fuel introduction section, 20b, 50b. Air introduction part, 30, 60. The fuel supply passages 31a, 31b, 61a, 61b. Fuel supply holes, 32, 62. Lateral fuel supply holes, 35, 65. Air supply channels, 36a, 36b, 66a, 66b. Air supply holes, 37, 67. Air supply lateral holes, 40, 70. Fuel discharge passages, 41, 71a, 71b. Fuel outlet holes, 42, 72. Fuel discharge lateral holes, 43, 73. Fuel outlet, 45, 75. Air discharge channels, 46, 76. Air exhaust holes, 47, 77. Air discharge side hole

Claims (4)

A cell and a separator are alternately stacked, and a stacked body in which the side surfaces of the cell are surrounded by the separator,
A manifold disposed on an end face of the laminate, and each including a fuel introduction unit for introducing a fuel gas from outside and an air introduction unit for introducing air from outside,
A flow path of a fuel gas supplied to the cell, a fuel supply flow path extending through the separator from the fuel introduction portion and extending in the stacking direction,
A flow path of air supplied to the cell, the air supply flow path extending through the separator from the air introduction portion and extending in the stacking direction,
With
The cells form a plurality of cell groups in the stacking direction,
An electrochemical cell stack, wherein at least one of the fuel supply channel and the air supply channel is provided for each of the cell groups. A cell and a separator are alternately stacked, and a stacked body in which the side surfaces of the cell are surrounded by the separator,
Sandwiched in the middle of the stacked body, a manifold having a fuel introduction unit for introducing a fuel gas from outside and an air introduction unit for introducing air from outside,
A flow path of a fuel gas supplied to the cell, a fuel supply flow path extending through the separator from the fuel introduction portion and extending in the stacking direction,
A flow path of a fuel gas supplied to the cell, an air supply flow path extending through the separator from the air introduction portion and extending in the stacking direction,
With
The cells form a cell group above and below the manifold in the stacking direction,
An electrochemical cell stack, wherein at least one of the fuel supply channel and the air supply channel is provided for each of the cell groups.   A fuel cell comprising the electrochemical cell stack according to claim 1.   A hydrogen production apparatus comprising the electrochemical cell stack according to claim 1.

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