JP2019046775A - Fuel cell module and fuel cell device - Google Patents

Abstract

To provide a fuel cell module in which heat exchange between an oxygen-containing gas and a high-temperature area is efficiently performed in an oxygen-containing gas introduction member, and a fuel cell device with high power generation efficiency using the same.SOLUTION: A fuel cell module 10 comprises: a cell stack 4 that has a plurality of fuel cells arranged; a storage container 1 that stores the cell stack 4; and a hollow oxygen-containing gas introduction member 2 that supplies an oxygen-containing gas to lower parts of the fuel cells. The oxygen-containing gas introduction member 2 includes a first plate member 21 that faces a high-temperature area in the storage container 1, and a second plate member 22 that faces the first plate member with a hollow part (oxygen-containing gas channel 33) therebetween; on any cross section in the vertical direction of the fuel cells, at least part of the first plate member 21 has a curved shape, and the total length in the vertical direction of an outer surface 21a toward the cell stack 4 of the first plate member 21 is longer than the total length in the vertical direction of an outer surface 22a toward the storage container 1 of the second plate member 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fuel cell module and a fuel cell device.

  In recent years, a cell stack device in which a plurality of fuel cells capable of obtaining electric power using fuel gas (hydrogen-containing gas) and air (oxygen-containing gas) as next-generation energy is housed in a storage container. Various fuel cell modules and fuel cell devices in which the fuel cell module is housed in an outer case have been proposed (see, for example, Patent Document 1).

  The fuel cell module has a configuration in which a cell stack device is stored in a storage chamber in a storage container, and a flow path for supplying an oxygen-containing gas to the cell stack device and a flow for discharging exhaust gas to the outside. A passage is formed in the storage container. The oxygen-containing gas and the exhaust gas flow through the flow paths adjacent to each other to perform heat exchange efficiently between the oxygen-containing gas and the exhaust gas.

  Further, in the fuel cell module, the oxygen-containing gas can flow through the space (flow path) between the two plates after passing through the heat exchange site with the above-mentioned exhaust gas, It is introduced into a columnar root or base below each fuel cell. The oxygen-containing gas flowing through the oxygen-containing gas introduction member exchanges heat with a relatively high temperature fluid in the fuel cell module to make the oxygen-containing gas supplied to the cell stack device a higher temperature.

JP 2012-28099 A

  By the way, in the case where the region facing the plate on one side of the two plates of the oxygen-containing gas introducing member described above has a higher temperature than the region facing the plate on the other side, all the plates have the same structure. In addition, there is a possibility that heat exchange can not be performed efficiently between the oxygen-containing gas and the high temperature region in the fuel cell module.

  An object of the present invention is to provide a fuel cell module in which heat exchange between an oxygen-containing gas and a high temperature region is efficiently performed in an oxygen-containing gas introduction member, and a fuel cell device with high power generation efficiency using the same. It is.

A fuel cell module according to the present disclosure includes a cell stack formed by arranging a plurality of fuel cells that perform power generation using an oxygen-containing gas and a fuel gas, a storage container having a storage chamber for storing the cell stack, and oxygen A hollow oxygen-containing gas introducing member for supplying a contained gas to the lower side of each fuel cell, which is a first plate member suspended from above the storage chamber and facing a high temperature region, and the first plate member And an oxygen-containing gas introducing member having a second plate member opposed to the hollow portion serving as a flow path of the oxygen-containing gas.
In any cross section in the vertical direction of the fuel cell and in the direction orthogonal to the arrangement direction of the fuel cell,
At least a part of the first plate member has a curved shape, and the total length along the outer surface of the first plate member is longer than the total length along the outer surface of the second plate member. .

  In addition, a fuel cell device of the present disclosure includes a fuel cell module, an accessory for operating the fuel cell module, and an outer case housing the fuel cell module and the accessory.

  According to the fuel cell module of the present disclosure, heat exchange between the oxygen-containing gas supplied to the fuel cell and the high-temperature region can be efficiently performed by passing through the oxygen-containing gas introduction member. It is possible to suppress a decrease in power generation efficiency.

  Further, according to the fuel cell device of the present disclosure, the power generation efficiency can be improved by including the above-described fuel cell module.

It is a disassembled perspective view of the fuel cell module of embodiment. It is a longitudinal section showing the internal configuration of the fuel cell module of an embodiment. (A) is a half sectional view (cut model) showing the shape of the oxygen-containing gas introduction member inside the fuel cell module, and (b) the shape of the opening of the top plate to which the oxygen-containing gas introduction member is joined; It is a top view which shows the locked state of the flange part of a 1st thermocouple insertion member. (A) It is the front view which looked at the oxygen containing gas introduction member inside a fuel cell module from the cell stack direction, and (b) is a description which shows a metal plate material which comprises an oxygen containing gas introduction member being wound. FIG. It is sectional drawing explaining the structure of the 1st and 2nd thermocouple insertion member used for insertion of a thermocouple. They are (a) front view and (b) side view of the 1st thermocouple insertion member used for insertion of a thermocouple. It is a schematic block diagram of the fuel cell apparatus of embodiment.

  The fuel cell module 10 according to the embodiment is a fuel cell module of a solid oxide fuel cell (SOFC), and as shown in the exploded perspective view of FIG. Cell stack device S comprising reformer 6, oxygen-containing gas introduction member 2 (air introduction plate), plate-like member (top plate 3) for flow path formation of oxygen-containing gas, and internal heat-insulating member 7 (7A) , 7B, 7C, etc.), and the opening of the storage container 1 is sealed by a lid 8.

  As shown in the longitudinal cross-sectional view of FIG. 2, a central internal space composed of a bottom heat insulator (base) 7C, side heat insulators 7A, 7B, etc. is formed as the storage chamber 11 inside thereof. The cell stack device S is accommodated in the accommodation room 11. In the embodiment shown in FIG. 2, the oxygen-containing gas introduction member 2 is disposed adjacent to the storage chamber 11, and the storage chamber 11 side of the oxygen-containing gas introduction member 2 is a high temperature region. On the other hand, the heat insulating member (side heat insulating material 7A) is disposed on the opposite side of the oxygen containing gas introduction member 2 to the storage chamber 11 side, and the side heat insulating material 7A side from the oxygen containing gas introduction member 2 is a low temperature region. Do.

  In addition, on the lid 8 side (left side in FIG. 2) that seals the opening of the storage container 1, oxygen-containing gas flow paths 31 and 32 for supplying oxygen-containing gas to the cell stack 4 and the combustion chamber 11 B After heat exchange with the above-described oxygen-containing gas, the high temperature exhaust gas generated in the above is provided with exhaust gas flow paths 41, 42 and the like for discharging the fuel cell module 10 to the outside. In addition, each member used in order to form a gas flow path is named generically, and it calls the flow-path formation member 9. As shown in FIG.

  The oxygen-containing gas (external air) supplied to the cell stack 4 is first taken in from the air introduction pipe 9D, which is an inlet provided to the lid 8, and the lid 8 and the outer surface side of the lid 8 (shown The first oxygen-containing gas flow path 31 formed between it and the first flow path member 9A disposed on the left side is flowed upward. The oxygen-containing gas that has reached the upper end is stored from the slit-like inlet 8 a provided in the lid 8 with the top plate 3 (second flow path member) disposed in the upper part (ceiling part) inside the storage container 1 It flows into the second oxygen-containing gas channel 32 (air pool) formed between the inner surface (the top surface) of the container 1 and the inner surface.

  Next, the oxygen-containing gas is formed on the lower surface (bottom surface) of the second oxygen-containing gas flow channel 32 from the opening 3a which is the bonding part 2a, and the cell stack 4 and the side in the storage chamber 11 below. It flows into the third oxygen-containing gas passage 33 in the oxygen-containing gas introduction member 2 disposed between the heat insulator 7A and the heat insulator 7A, and flows to the lower end. The oxygen-containing gas that has reached the lower end is formed from the plurality of discharge ports 2 b provided horizontally in the horizontal direction on the cell stack 4 side of the lower end side surface of the oxygen-containing gas introduction member 2. Supplied to the root or base between them.

  The oxygen-containing gas supplied between the fuel cells contributes to the power generation while rising between the cells, and then reaches the upper end and rises in the gap on the opposite side of each fuel cell. It is mixed with fuel gas (hydrogen-containing gas), ignited and burned. After being used as a heat source for water vaporization and a heat source for reforming of the reformer 6 (see FIG. 2) disposed in the combustion chamber 11B, the high temperature due to the combustion is maintained as the combustion exhaust gas while maintaining the high temperature. It is discharged through the exhaust gas flow paths 41 and 42.

  The exhaust gas discharged from the combustion chamber 11B is, first, the third flow passage member 9B disposed on the lid 8 and the inner surface side (right side in the drawing) of the lid 8 and the lid 8 from the exhaust port 11c provided in the upper portion of the combustion chamber 11B. And flows into the first exhaust gas channel 41 formed between the two and flows downward. The exhaust gas reaching the lower end is formed in the fourth flow path member 9C disposed further outside of the first flow path member 9A described above via the discharge pipe 9F disposed in the lid 8 And the second exhaust gas flow path 42. Then, the exhaust gas having flowed up to the upper end in the second exhaust gas flow path 42 located on the outermost surface (the left side in the drawing) of the lid 8 is discharged to the outside of the fuel cell module 10 through the connection pipe 9E.

  At this time, around the lid 8, low-temperature (room temperature) air flowing from the outside flows upward in the first oxygen-containing gas channel 31, and both left and right sides of a member made of metal etc. A high temperature exhaust gas flows in the first exhaust gas flow path 41 and the second exhaust gas flow path 42 disposed in the first and second directions. Thus, heat exchange is performed between the low temperature air and the high temperature exhaust gas on the lid 8 side (left side in FIG. 2) of the storage container 1 in the fuel cell module 10 of the embodiment, and the fuel cell is The air supplied is warmed so that the power generation efficiency of the fuel cell can be enhanced.

  On the other hand, in the configuration of the concave box-shaped bottom portion side (closer to the side wall 1a in the right side in FIG. 2) of the storage container 1 facing the lid 8 across the cell stack device S in the storage container 1 With the structure of the oxygen-containing gas introduction member 2 disposed between the stack 4 and the side heat insulating material 7A, various measures are made to enhance the power generation efficiency of the fuel cell.

  That is, as shown in FIG. 2, the oxygen-containing gas introducing member 2 in the fuel cell module 10 of the embodiment is a plate-like member (first plate member 21) located on the cell stack 4 side (high temperature region side) A plate member (second plate member 22) disposed on the side of the heat insulator 7A (the low temperature region side) and facing the first plate member 21 with the hollow portion serving as the flow path of the oxygen-containing gas interposed therebetween; Have. The first plate member 21 and the second plate member 22 are disposed parallel to each other in the arrangement direction of the cells so as to face each other, and a vertical gap (hollow portion) formed between them Is the third oxygen-containing gas channel 33 described above. The plate-like member may be made of metal.

  Here, as shown in FIG. 2, the first plate member 21 located on the side of the combustion chamber 11B which is a high temperature region in an arbitrary cross section in the vertical direction of the fuel cell and the direction orthogonal to the arrangement direction of the fuel cells. At least a portion of is curved. In addition, the total length along the outer surface 21 a of the first plate member 21 is longer than the total length along the outer surface 22 a of the second plate member 22. The second plate member 22 may also be curved.

  That is, the entire length along the curve of the surface 21a (the outer surface 21a on the cell stack 4 side) facing the cell stack 4 in the first plate member 21 and the surface 22a facing the side heat insulating material 7A in the second plate member 22 Comparing with the total length along the outer surface 22a on the side heat insulating material 7A side, the total length (L21a) of the outer surface 21a of the first plate member 21 is the total length (L22a) of the outer surface 22a of the second plate member 22. ) Longer (L21a> L22a).

  The total length along the outer surface 21 a of the first plate member 21 is not a linear total length in the vertical direction but an entire length along a curved shape. When the second plate member 22 is curved in the same manner as the first plate member 21, the total length of the second plate member 22 along the outer surface 22 a is the same as the first plate member 21 in the curved shape. Total length. The curved shape may be curved so as to protrude in only one direction, or it may be a wave shape having any of a portion protruding in any one direction and a portion protruding in the other direction. Good. In the case of the corrugated shape, the total length along the outer surface 21 a of the first plate member 21 can be made longer.

  With this configuration, the surface area of the outer surface 21a of the first plate member 21 facing the high temperature region side can be increased, so that heat exchange between the oxygen-containing gas and the high temperature region can be efficiently performed. As a result, in the fuel cell module 10 according to the embodiment, the oxygen-containing gas supplied to the fuel cell is sufficiently heated, and the decrease in the power generation efficiency is suppressed. Therefore, the fuel cell device using the fuel cell module 10 of the above configuration can improve its power generation efficiency.

  FIG. 2 is a vertical cross-sectional view of the fuel cell module 10 taken along the central portion in the arrangement direction of the fuel cells. By increasing the surface area of the outer surface 21a of the first plate member 21 facing the high temperature region side of the central portion which is higher temperature also in the arrangement direction of the fuel cells, the oxygen containing gas and the high temperature region can be more efficiently Heat exchange with The central portion in the arrangement direction of the fuel cells refers to the central three divisions of the entire length in the arrangement direction of the fuel cells divided into five equal parts.

  Furthermore, as shown in the cut model of FIG. 3 (a), both the first plate member 21 on the cell stack 4 side and the second plate member 22 on the side heat insulating material 7A side are also fuel cells in the cross section. The central portion in the cell arrangement direction may have a curved shape closer to the combustion chamber 11B which is a high temperature region. FIG. 3A corresponds to a cross-sectional view taken along the line X-X in FIG.

  The outer surface 21a (FIG. 4A) of the first plate member 21 described above is the other surface of the oxygen-containing gas introduction member 2, for example, the inner surface 21b of the first plate member 21 and the second plate member 22. It may be a rough surface having a higher surface roughness than the outer surface 22a, the inner surface 22b, and the like. Thereby, the surface area of the outer surface 21a is further increased, so the heat exchange efficiency between the high temperature region (combustion chamber 11) outside the outer surface 21a of the first plate member 21 and the oxygen-containing gas flowing inside the outer surface 21a. Can be improved.

  Therefore, also with this configuration, heat exchange between the oxygen-containing gas and the high temperature region can be efficiently performed. The outer surface 21a of the first plate member 21 is higher in surface roughness than the other surfaces of the oxygen-containing gas introduction member 2 because the outer surface 21a of the first plate member 21 is other than the oxygen-containing gas introduction member It means that arithmetic mean roughness Ra is larger than the surface of 2.

  Furthermore, the joint portion 2a at the upper end of the oxygen-containing gas introduction member 2 described above and the opening 3a of the top plate 3 formed on the lower surface of the second oxygen-containing gas passage 32 are connected in an airtight manner by welding. The opening 3a of the top 3 is formed in a rectangular shape with rounded corners, as shown in FIG. 3 (b). The edge shape of the opening 3 a is for preventing the occurrence of a crack or a crack from a corner.

  Thereby, the product life of the oxygen-containing gas introduction member 2 and the fuel cell module 10 using the same can be extended. The edge shape of the opening 3a may be any shape as long as it is a shape such as a long hole shape or an oval shape that does not cause an occurrence of a crack, which is not a sharp angle or a sharp shape.

  In the oxygen-containing gas introducing member 2, the first plate member 21 and the second plate member 22 each form a convex portion toward the hollow portion side in order to rectify the oxygen-containing gas flowing through the inside, By bringing these into contact with each other, a “rectifier” may be provided which collapses the hollow portion inside the oxygen-containing gas introduction member 2 to form a flow path.

  Of the outer surface 21a of the first plate member 21 on the cell stack 4 side, a portion of the high temperature region above the upper end of the cell stack 4 that faces the combustion chamber 11B having a relatively high temperature is along the vertical direction It may be a flat portion (flat portion). The flat portion means that there is no portion where the hollow portion between the first plate member 21 and the second plate member 22 is crushed, as in the straightening portion described above, The flat portion may be curved.

  With this configuration, the hollow portion between the first plate member 21 and the second plate member 22 is crushed in the high temperature region at a portion facing above the upper end of the cell stack having a relatively high temperature. Because there is no heat exchange between the oxygen-containing gas and the high-temperature area, more heat exchange can be performed because it is possible to secure many heat exchange surfaces between the oxygen-containing gas flowing inside and the high-temperature area. become.

  In the fuel cell module 10 of the embodiment, when the first plate member 21 facing the cell stack 4 in the oxygen-containing gas introduction member 2 is incorporated in the fuel cell module 10 as shown in FIG. It may be formed using a metal plate which has been subjected to a rolling process in advance in the direction corresponding to the horizontal direction (black arrow direction in FIG. 4).

  That is, the first plate member 21 is rolled in the direction of the solid arrow shown in FIG. 4 (b) in the production line of the metal plate, and wound as it is in the form of a roll with the solid arrow direction as the longitudinal direction. It manufactures using the plate member which carried out the punching process etc. so that the direction (black arrow direction) unrolled from this may correspond with the black arrow direction in the 1st plate member 21 shown in Drawing 4 (a). be able to.

  According to the above configuration, since stress is inherent in the direction in which the first plate member 21 is rolled, in the case where the first plate member 21 is curved in the vertical direction as in the embodiment shown in FIG. In addition, it is possible to suppress that the curved shape is deformed with time in the vertical direction.

  As mentioned above, although the embodiment of the present invention was described in detail, the present invention is not limited to the above-mentioned embodiment, and various change, improvement, etc. are possible in the range which does not deviate from the gist of the present invention. is there.

  For example, the oxygen-containing gas introduction member 2 may be disposed on either side (right side or left side in FIG. 2) of the cell stack 4 in the arrangement direction, or may be disposed on both sides. Further, the flow path for introducing the oxygen-containing gas (air) into the oxygen-containing gas introduction member 2 can also be configured in any way by adapting to the arrangement of the oxygen-containing gas introduction member 2.

  In addition, the cell stack device may be provided with a plurality of rows of cell stacks 4. That is, the oxygen-containing gas introduction member 2 may be disposed between a plurality of cell stacks 4 having a temperature distribution in the arrangement direction of the cell stacks 4.

  Next, as shown in the cross-sectional view of FIG. 2, in the fuel cell module 10 of the embodiment, the thermocouple 12 which is a sheath-shaped ThermoCouple (TC) for measuring the internal temperature of the oxygen-containing gas introduction member 2. The second thermocouple insertion member 14 outside the storage container is inserted and passes through the first through hole 1 b provided on the upper surface of the outer wall of the storage container 1 to open the top plate 3 (second flow path member) It is inserted into the first thermocouple insertion member 13 disposed downward from the portion 3 a, and is inserted between the first plate member 21 and the second plate member 22 of the oxygen-containing gas introduction member 2.

  FIG. 5 is a cross-sectional view showing the configuration of the first thermocouple insertion member 13 and the second thermocouple insertion member 14. The second thermocouple insertion member 14 is composed of a hollow tube 14A which is a cylindrical member, and a base 14B connected to the lower end 14c of the hollow tube 14A.

  The base 14B is a substantially disk-shaped flat plate member, and a second through hole 14e through which the thermocouple 12 can be inserted is provided at a central portion or center of the base 14B. The base 14B and the hollow tube 14A are connected by welding or the like so that the second through hole 14e and the hollow portion of the hollow tube 14A communicate concentrically. The thermocouple 12 is inserted into the hollow tube 14A, and the upper end 14d of the hollow tube 14A and the sheathed thermocouple 12 are sealed and fixed by brazing or the like.

  Further, as shown in FIG. 5, the base 14B penetrates the first through hole of the storage container 1 via a seal member (packing 15) having a through hole 15a having the same shape as the second through hole 14e of the base 14B. It is placed at a position concentric with the hole 1b. The base 14B and the storage container 1 are fixed by screwing or the like.

  By fixing the hollow tube 14A and the thermocouple 12 and fixing the base 14B and the storage container 1 as described above, the retention of the thermocouple 12 and the sealing of the storage container 1 are simultaneously achieved. In addition, since the brazed portion of the hollow tube 14A and the thermocouple 12 is separated from the storage container 1 by the length of the hollow tube 14A, the brazed portion is prevented from being exposed to high temperature, and durability is achieved. Can be held. Furthermore, by arranging the base 14B at a position of a predetermined length from the tip end portion 12a of the thermocouple 12, it is possible to determine the length for inserting the thermocouple 12 inside the storage container 1. As a result, the tip end portion 12a of the thermocouple 12 can be reliably disposed at a predetermined position between the first plate member 21 and the second plate member 22 of the oxygen-containing gas introduction member 2, thereby improving the assemblability. Do.

  The first thermocouple insertion member 13 has the second oxygen-containing gas flow path 32 formed between the inner surface (lower surface) of the storage container 1 and the top plate 3 in the first through hole 1b. It is attached at a position corresponding to the position just below the vertical. When viewed from directly above, as shown in FIG. 3 (b), the shape is a guide that allows the thermocouple 12 to be inserted vertically downward at a central position corresponding to directly below the first through hole 1b. A gap (guide space G) is formed.

  FIG. 6A is a front view of the first thermocouple insertion member 13 as viewed from the width direction of the first plate member 21 of the oxygen-containing gas introduction member 2, and FIG. ) Is a side view. As shown in this figure, the first thermocouple insertion member 13 is configured by joining two members 13A and 13B branched in a bifurcated shape toward the lower side in the drawing, as shown in FIG. 6A. When viewed from the front side, a guide space G through which the distal end 12a of the thermocouple 12 can be inserted is formed between the lower bifurcated portions 13c and 13c.

  Further, as shown in FIGS. 6B and 3B, the upper end portion of the first thermocouple insertion member 13 has a flange portion 13d which protrudes in the width direction of the opening 3a of the top plate 3 respectively. When the first thermocouple insertion member 13 is inserted between the first plate member 21 and the second plate member 22, these flange portions 13 d and 13 d are the edge portions of the opening 3 a. It is locked to perform positioning and fall prevention functions.

  With the above configuration, the thermocouple 12 for measuring the internal temperature of the oxygen-containing gas introducing member 2 can be easily inserted and fixed to a predetermined position between the first plate member 21 and the second plate member 22. . In particular, even if the oxygen-containing gas introduction member 2 is an oxygen-containing gas introduction member in which at least a portion of the first plate member 21 has a curved shape as shown in FIG. 2 and FIG. 12 can be easily inserted.

  The first thermocouple insertion member 13 inserted between the first plate member 21 and the second plate member 22 causes the temporal deformation of the curved shape of the first plate member 21 described above. , Can be more suppressed.

  In addition, the above-described second thermocouple insertion member 14 outside the storage container and the first thermocouple insertion member 13 inside the storage container are fuel cell modules in which the oxygen-containing gas introduction member (air introduction plate) is not curved. And fuel cell devices.

Next, FIG. 7 is a transparent perspective view showing an example of the fuel cell device 100 of the present embodiment.
The fuel cell device 100 includes the fuel cell module 10 described above, an accessory for operating the fuel cell module 10, and an outer case 50 for containing the fuel cell module 10 and the accessory. In FIG. 7, the configuration is partially omitted.

  As shown in FIG. 7, the fuel cell apparatus 100 accommodates the fuel cell module 10 of the above-described embodiment in an outer case formed of each support 51 and an outer plate (not shown). In the exterior case, in addition to the illustrated fuel cell module 10, a tank for heat storage, a power conditioner for supplying generated electric power to the outside, and accessories such as a pump and a controller are disposed.

  According to the fuel cell device 100 of the present embodiment, the power generation efficiency can be improved by providing the fuel cell module 10.

DESCRIPTION OF SYMBOLS 1 Storage container 1b 1st through-hole 2 oxygen containing gas introduction member 2a junction part 2b discharge part 3 top plate (2nd flow path member)
3a Opening 4 Cell stack 7 Internal heat insulating member 7A, 7B Side heat insulating material 10 Fuel cell module 11 Storage room 11A Power generation room 11B Combustion room 12 Thermocouple (TC)
13 first thermocouple insertion member 13c bifurcated portion 13d flange portion 14 second thermocouple insertion member 14A hollow tube (cylindrical member)
14B base 14e second through hole 21 first plate member 21a outer surface 21b inner surface 22 second plate member 22a outer surface 22b inner surface 31 first oxygen-containing gas channel 32 second oxygen-containing gas channel 33 third Oxygen-containing gas flow path 100 Fuel cell device S Cell stack device G Guide space (guide space)

Claims (11)

A cell stack formed by arranging a plurality of fuel cells that perform power generation using an oxygen-containing gas and a fuel gas;
A storage container having a storage room for storing the cell stack;
A hollow oxygen-containing gas introduction member for supplying an oxygen-containing gas to the lower side of each fuel cell, which is a first plate member suspended from above the storage chamber and facing a high temperature region, and the first plate member And an oxygen-containing gas introduction member having a second plate member opposed to the hollow portion serving as a flow path for the oxygen-containing gas.
In any cross section in the vertical direction of the fuel cell and in the direction orthogonal to the arrangement direction of the fuel cell,
At least a portion of the first plate member is curved and
A fuel cell module characterized in that the total length along the outer surface of the first plate member is longer than the total length along the outer surface of the second plate member.   The fuel cell module according to claim 1, wherein the arbitrary cross section is a cross section of a central portion in the arrangement direction of the fuel cells.   The fuel cell according to claim 1 or 2, wherein the oxygen-containing gas introduction member is a rough surface having a surface roughness higher than the surface other than the outer surface of the first plate member. module. The storage container has a top plate of the storage room,
The top plate includes an opening through which the oxygen-containing gas introduction member is inserted,
The shape of a joint portion where the upper end of the oxygen-containing gas introduction member and the top plate are joined is any one of a rectangular, a long hole, and an oval having rounded corners. The fuel cell module according to claim 1.   5. The oxygen-containing gas introduction member according to claim 1, wherein at least a first plate member facing the cell stack is formed of a metal plate rolled in a direction corresponding to a module horizontal direction. The fuel cell module according to claim 1.   The fuel cell module according to any one of claims 1 to 5, wherein a portion of the first plate member facing above the upper end of the cell stack is a flat portion. A thermocouple for measuring the internal temperature of the oxygen-containing gas introduction member;
The fuel cell module according to claim 4, further comprising: a first thermocouple insertion member positioned between the first plate member and the second plate member of the oxygen-containing gas introduction member.   The fuel cell module according to claim 7, wherein a lower portion of the first thermocouple insertion member is bifurcated into two parts and hanging down.   The fuel cell module according to claim 7, wherein the first thermocouple insertion member has a locking flange that locks to the top plate. The outer wall of the storage container has a first through hole into which the thermocouple is inserted;
A second thermocouple insertion member connected to the first through hole and inserting the thermocouple;
The second thermocouple insertion member is
A tubular member, and a base having a second through hole connected to one end of the tubular member,
The base is placed on the outer wall of the storage container such that the first through hole in the outer wall of the storage container and the second through hole are concentric with each other in the second thermocouple insertion member. And
The fuel cell module according to any one of claims 7 to 9, wherein the thermocouple is joined to the other end of the cylindrical member. The fuel cell module according to any one of claims 1 to 10.
An auxiliary machine for operating the fuel cell module;
An exterior case for housing the fuel cell module and the accessory;
A fuel cell device comprising: