JP7011434B2 - Fuel cell module and fuel cell device - Google Patents

Description

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

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

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

Further, in the fuel cell module, an oxygen-containing gas introduction member capable of allowing the oxygen-containing gas to flow through the space (flow path) between the two plates after passing through the heat exchange portion with the exhaust gas described above. Via, it is introduced into a columnar root or base below each fuel cell. The oxygen-containing gas flowing through the oxygen-containing gas introducing member exchanges heat with a relatively high-temperature fluid in the fuel cell module, so that the oxygen-containing gas supplied to the cell stack device has a higher temperature.

Japanese Unexamined Patent Publication No. 2012-28099

By the way, when the region facing the plate on one side of the two plates of the oxygen-containing gas introduction member described above is higher than the region facing the plate on the other side, both plates have the same structure. And, there is a possibility that heat exchange cannot be efficiently performed 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 introducing member, and a fuel cell device using the same, which has high power generation efficiency. Is.

The fuel cell module of the present disclosure includes a cell stack in which a plurality of fuel cell cells that generate electricity using an oxygen-containing gas and a fuel gas are arranged.
A storage container having a storage chamber for storing the cell stack,
A hollow oxygen-containing gas introduction member that supplies oxygen-containing gas below each fuel cell, and a first plate member that hangs down from above the storage chamber and faces a high temperature region, and the first plate member. It is provided with an oxygen-containing gas introducing member having a second plate member facing the hollow portion which is a flow path of the oxygen-containing gas.
In an arbitrary 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 in which the central portion of the fuel cell in the vertical direction is closer to the combustion chamber side than the upper end portion .
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.

Further, the fuel cell device of the present disclosure includes a fuel cell module, an auxiliary machine for operating the fuel cell module, and an outer case for accommodating the fuel cell module and the auxiliary machine.

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

Further, according to the fuel cell apparatus of the present disclosure, the power generation efficiency can be improved by providing the above-mentioned fuel cell module.

It is an exploded perspective view of the fuel cell module of an embodiment. It is sectional drawing in the vertical direction which shows the internal structure of the fuel cell module of embodiment. (A) is a half cross-sectional view (cut model) showing the shape of the oxygen-containing gas introducing member inside the fuel cell module, and (b) is the shape of the opening of the top plate to which the oxygen-containing gas introducing member is joined. It is a top view which shows the locked state of the flange part of the 1st thermocouple insertion member. (A) is a front view of the oxygen-containing gas introducing member inside the fuel cell module as viewed from the cell stack direction, and (b) is an explanation showing how the metal plate material constituting the oxygen-containing gas introducing member is wound. It is a figure. It is sectional drawing explaining the structure of the 1st and 2nd thermocouple insertion members used for inserting a thermocouple. It is (a) front view and (b) side view of the 1st thermocouple insertion member used for inserting a thermocouple. It is a schematic block diagram of the fuel cell apparatus of embodiment.

The fuel cell module 10 of the embodiment is a fuel cell module of a solid oxide fuel cell (SOFC), and as shown in the exploded perspective view of FIG. 1, the cell stack 4, the manifold 5 and the inside of the storage container 1 A cell stack device S including a reformer 6, an oxygen-containing gas introduction member 2 (air introduction plate), a plate-shaped member for forming a flow path for oxygen-containing gas (top plate 3), and an internal heat insulating member 7 (7A). , 7B, 7C, etc.) are accommodated, and the opening of the storage container 1 is sealed with a lid 8.

Inside, as shown in the vertical cross-sectional view of FIG. 2, a central internal space composed of a bottom heat insulating material (pedestal) 7C, side heat insulating materials 7A, 7B, etc. is formed as a storage chamber 11. The cell stack device S is housed in the storage room 11. In one embodiment shown in FIG. 2, the oxygen-containing gas introducing member 2 is arranged adjacent to the storage chamber 11, and the storage chamber 11 side of the oxygen-containing gas introducing member 2 is set as a high temperature region. On the other hand, a heat insulating member (side heat insulating material 7A) is arranged on the side opposite to the storage chamber 11 side of the oxygen-containing gas introducing member 2, and the side heat insulating material 7A side from the oxygen-containing gas introducing member 2 is defined as a low temperature region. do.

Further, on the lid 8 side (left side in the drawing of FIG. 2) that seals the opening of the storage container 1, oxygen-containing gas passages 31, 32, etc. for supplying oxygen-containing gas to the cell stack 4 and a combustion chamber 11B are provided. Exhaust gas flow paths 41, 42 and the like for exhausting the high-temperature exhaust gas generated in the above-mentioned oxygen-containing gas to the outside of the fuel cell module 10 after heat exchange with the above-mentioned oxygen-containing gas are provided. In addition, each member used for forming a gas flow path is generically referred to as a flow path forming member 9.

The oxygen-containing gas (outside air) supplied to the cell stack 4 is first taken in from the air introduction pipe 9D, which is an introduction port provided in the lid 8, and is on the outer surface side of the lid 8 and the lid 8 (not shown). It flows upward in the first oxygen-containing gas flow path 31 formed between the first flow path member 9A arranged on the left side). The oxygen-containing gas that has reached the upper end is stored from the slit-shaped inflow port 8a provided in the lid 8 to the top plate 3 (second flow path member) arranged in the upper part (ceiling portion) inside the storage container 1. It flows into the second oxygen-containing gas flow path 32 (air reservoir) formed between the inner surface (top surface) of the container 1.

Next, the oxygen-containing gas is formed on the lower surface (bottom surface) of the second oxygen-containing gas flow path 32 from the opening 3a which is the joint portion 2a, and is below the opening 3a and on the side of the cell stack 4 in the storage chamber 11. It flows into the third oxygen-containing gas flow path 33 in the oxygen-containing gas introducing member 2 arranged between the heat insulating material 7A and flows to the lower end. The oxygen-containing gas that has reached the lower end is collected from each of the columnar fuel cell cells constituting the cell stack 4 from a plurality of horizontal discharge ports 2b provided on the cell stack 4 side on the lower end side surface of the oxygen-containing gas introduction member 2. It is supplied to the root or base of the space.

The oxygen-containing gas supplied between the fuel cell cells contributes to 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, which is a surplus. It is mixed with fuel gas (hydrogen-containing gas), ignited, and burned. The high temperature due to combustion is used as a heat source for water vaporization and a heat source for reforming of the reformer 6 (see FIG. 2) arranged in the combustion chamber 11B, and then as combustion exhaust gas while maintaining the high temperature. It is discharged through the exhaust gas channels 41 and 42.

The exhaust gas discharged from the combustion chamber 11B first is a third flow path member 9B arranged on the inner surface side (right side in the drawing) of the lid 8 and the lid 8 from the discharge port 11c provided in the upper part of the combustion chamber 11B. It flows into the first exhaust gas flow path 41 formed between the and, and flows downward. The exhaust gas that reached the lower end was formed in the fourth flow path member 9C arranged further outside the first flow path member 9A described above via the discharge pipe 9F arranged in the lid 8. , Outflow to the second exhaust gas flow path 42. Then, the exhaust gas that has flowed to the upper end in the second exhaust gas flow path 42 located on the outermost surface (left side in the drawing) of the lid 8 is discharged to the outside of the fuel cell module 10 via the connecting pipe 9E.

At this time, around the lid 8, low-temperature (room temperature) air flowing in from the outside flows upward in the first oxygen-containing gas flow path 31, while sandwiching a member made of metal or the like on both the left and right sides thereof. High-temperature exhaust gas flows through the first exhaust gas flow path 41 and the second exhaust gas flow path 42 arranged in the room. As described above, in the fuel cell module 10 of the embodiment, heat is exchanged 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, and the fuel cell is connected to the fuel cell. It is configured so that the supplied air can be warmed to increase the power generation efficiency of the fuel cell.

On the other hand, in the configuration of the bottom side of the concave box shape of the storage container 1 (closer to the side wall 1a on the right side in FIG. 2) facing the lid 8 with the cell stack device S sandwiched in the storage container 1, the cell is used. Various measures have been taken to improve the power generation efficiency of the fuel cell by the structure of the oxygen-containing gas introducing member 2 arranged between the stack 4 and the side heat insulating material 7A.

That is, as shown in FIG. 2, the oxygen-containing gas introduction member 2 in the fuel cell module 10 of the embodiment has a plate-shaped member (first plate member 21) located on the cell stack 4 side (high temperature region side) and a side. A plate-shaped member (second plate member 22) arranged on the heat insulating material 7A side (low temperature region side) and facing the first plate member 21 with a hollow portion serving as a flow path for oxygen-containing gas. I have. The first plate member 21 and the second plate member 22 are arranged so as to be parallel to each other in the cell arrangement direction and to face each other, and a vertical gap (hollow portion) formed between them. However, it is the third oxygen-containing gas flow path 33 described above. The plate-shaped member may be made of metal.

Here, as shown in FIG. 2, the first plate member 21 located on the combustion chamber 11B side, which is a high temperature region, in an arbitrary 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 part of is curved. In addition, the total length of the first plate member 21 along the outer surface 21a is longer than the total length of the second plate member 22 along the outer surface 22a. The second plate member 22 may also be curved.

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

The total length along the outer surface 21a of the first plate member 21 does not mean a linear total length in the vertical direction, but a total 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 22a is along the curved shape as in the first plate member 21. It means the total length. The curved shape may be curved so as to protrude in only one direction, or may be a wave shape having both a portion protruding in any one direction and a portion protruding in the other direction. good. In the case of a wavy shape, the total length of the first plate member 21 along the outer surface 21a 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 of the embodiment, the oxygen-containing gas supplied to the fuel cell is sufficiently heated, and the decrease in power generation efficiency is suppressed. Therefore, the fuel cell device using the fuel cell module 10 having the above configuration can improve the power generation efficiency.

FIG. 2 is a vertical cross-sectional view of the fuel cell module 10 cut at the center in the arrangement direction of the fuel cell. In the arrangement direction of the fuel cell, 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, is increased to more efficiently oxygen-containing gas and the high temperature region. Can exchange heat with. The central portion in the arrangement direction of the fuel cell means the three central divisions of the total length of the fuel cell in the arrangement direction divided into five equal parts.

Further, as shown in the cut model of FIG. 3A, 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 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. Note that FIG. 3A corresponds to a cross-sectional view taken along the line XX of FIG. 2.

The outer surface 21a [FIG. 4 (a)] of the first plate member 21 is the surface of the other oxygen-containing gas introducing member 2, for example, the inner surface 21b of the first plate member 21 and the second plate member 22. A rough surface having a higher surface roughness than the outer surface 22a, the inner surface 22b, etc. may be used. As a result, the surface area of the outer surface 21a is further increased, so that 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, even 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 has a higher surface roughness than the surface of the other oxygen-containing gas introducing member 2, which means that the outer surface 21a of the first plate member 21 has other oxygen-containing gas introducing members. It means that the arithmetic mean roughness Ra is larger than the surface of 2.

Further, the joint portion 2a at the upper end of the oxygen-containing gas introducing member 2 and the opening portion 3a of the top plate 3 formed on the lower surface of the second oxygen-containing gas flow path 32 are airtightly connected by welding. As shown in FIG. 3B, the opening 3a of the top plate 3 is formed into a rectangle with rounded corners. The edge shape of the opening 3a is for preventing the occurrence of cracks, cracks, etc. from the corners.

As a result, the product life of the oxygen-containing gas introduction member 2 and the fuel cell module 10 using the oxygen-containing gas introduction member 2 can be extended. The edge shape of the opening 3a may be any shape as long as the corners are not acute or sharp, such as a long hole shape or an elliptical shape, and do not cause cracks.

In the oxygen-containing gas introducing member 2, in order to rectify the oxygen-containing gas flowing through the inside, the first plate member 21 and the second plate member 22 each form a convex portion toward the hollow portion side. A "rectifying section" that forms a flow path by crushing the hollow portion inside the oxygen-containing gas introducing member 2 by bringing them into contact with each other may be provided.

Of the outer surface 21a on the cell stack 4 side of the first plate member 21, the portion above the upper end of the cell stack 4 and facing the combustion chamber 11B having a relatively high temperature in the high temperature region 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, such as the rectifying portion described above. The flat portion may be curved.

With this configuration, in the portion facing above the upper end of the cell stack, which has a relatively high temperature in the high temperature region, the hollow portion between the first plate member 21 and the second plate member 22 is crushed. Since there is no such thing, it is possible to secure a large number of surfaces for heat exchange between the oxygen-containing gas flowing inside and the high-temperature region, so that heat exchange can be performed more efficiently between the oxygen-containing gas and the high-temperature region. become.

In the fuel cell module 10 of the embodiment, when the first plate member 21 of the oxygen-containing gas introducing member 2 facing the cell stack 4 is incorporated in the fuel cell module 10 as shown in FIG. 2, the fuel cell module 10 It may be formed by using a pre-rolled metal plate in the direction corresponding to the horizontal direction of (the direction of the black-painted arrow in FIG. 4).

That is, the first plate member 21 is rolled in the direction of the black-painted arrow shown in FIG. 4B on the metal plate production line, and is wound as it is in a roll shape with the direction of the black-painted arrow as the longitudinal direction. Manufactured using a plate member punched so that the direction unwound from (black-painted arrow direction) coincides with the black-painted arrow direction in the first plate member 21 shown in FIG. 4 (a). be able to.

With the above configuration, stress is inherent in the first plate member 21 in the rolled direction. Therefore, when the first plate member 21 is curved in the vertical direction as in one embodiment as shown in FIG. In addition, it is possible to prevent the curved shape from being deformed over time in the vertical direction.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various changes and improvements can be made without departing from the gist of the present invention. be.

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

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

Next, in the fuel cell module 10 of the embodiment, as shown in the cross-sectional view of FIG. 2, a thermocouple 12 which is a sheath-shaped Thermo Couple (TC) for measuring the internal temperature of the oxygen-containing gas introducing member 2 is provided. It is inserted through the second thermocouple insertion member 14 outside the storage container, passes through the first through hole 1b provided on the upper surface of the outer wall of the storage container 1, and opens the top plate 3 (second flow path member). It is inserted through a first thermocouple insertion member 13 disposed downward from the portion 3a, and is inserted between the first plate member 21 and the second plate member 22 of the oxygen-containing gas introducing 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 tubular 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 in the center or the center thereof. The base 14B and the hollow pipe 14A are connected to each other by welding or the like so that the second through hole 14e and the hollow portion of the hollow pipe 14A communicate with each other concentrically. The thermocouple 12 is inserted into the hollow tube 14A, and the upper end 14d of the hollow tube 14A and the sheath-type thermocouple 12 are hermetically sealed and fixed by brazing or the like.

Further, the base 14B has a first penetration of the storage container 1 as shown in FIG. 5 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 thermocouple 12 is prevented from coming off and the inside of the storage container 1 is sealed at the same time. Further, 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 is durable. Can be held. Further, by disposing the base 14B at a position of a predetermined length from the tip portion 12a of the thermocouple 12, the length for inserting the thermocouple 12 inside the storage container 1 can be determined. As a result, the tip portion 12a of the thermocouple 12 can be reliably arranged at a predetermined position between the first plate member 21 and the second plate member 22 of the oxygen-containing gas introduction member 2, and the assemblability is improved. do.

The first thermocouple insertion member 13 sandwiches 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, and has the above-mentioned first through hole 1b. It is installed at a position corresponding to just below the vertical. When viewed from directly above, the shape is such that, as shown in FIG. 3 (b), the thermocouple 12 can be inserted vertically downward at the central position corresponding to directly below the first through hole 1b. A gap (guide space G) is formed.

FIG. 6 shows 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 (a) and from the arrangement direction of the cell stack 4 (b). ) It is a side view. As shown in this figure, the first thermocouple insertion member 13 is configured by joining two members 13A and 13B that are bifurcated downward in the drawing, as shown in FIG. 6A. When viewed from the front side, a guide space G through which the tip portion 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 protruding in the width direction of the opening portion 3a of the top plate 3, respectively. When the first thermocouple insertion member 13 is extended between the first plate member 21 and the second plate member 22, these flange portions 13d and 13d are the edges of the opening 3a. It is locked to the function of positioning and fall prevention.

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 introducing member 2 is an oxygen-containing gas introducing member in which at least a part of the first plate member 21 has a curved shape as shown in FIGS. 2 and 3A, the thermocouple is used. 12 can be easily inserted.

The first thermocouple insertion member 13 inserted between the first plate member 21 and the second plate member 22 undergoes the above-mentioned deformation of the first plate member 21 in the vertical direction with time. , Can be suppressed more.

Further, the above-mentioned 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 can also be applied to fuel cell devices.

Next, FIG. 7 is a transmission perspective view showing an example of the fuel cell device 100 of the present embodiment.
The fuel cell device 100 includes the above-mentioned fuel cell module 10, an auxiliary device for operating the fuel cell module 10, and an outer case 50 for accommodating the fuel cell module 10 and the auxiliary device. In FIG. 7, a part of the configuration is omitted.

As shown in FIG. 7, the fuel cell device 100 accommodates the fuel cell module 10 of the above embodiment in an outer case composed of each support column 51 and an exterior plate (not shown). 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 auxiliary equipment such as a pump and a controller are arranged in the outer case.

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.

1 Storage container 1b First through hole 2 Oxygen-containing gas introduction member 2a Joint part 2b Discharge part 3 Top plate (second flow path member)
3a Opening 4 Cell stack 7 Internal insulation 7A, 7B Side insulation 10 Fuel cell module 11 Storage chamber 11A Power generation chamber 11B Combustion chamber 12 Thermocouple (TC)
13 First thermocouple insertion member 13c Bifurcated part 13d Flange part 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 flow path 32 Second oxygen-containing gas flow path 33 Third Oxygen-containing gas flow path 100 Fuel cell device S Cell stack device G Guide space (guidance space)

Claims (11)

A cell stack consisting of a plurality of fuel cell cells that generate electricity using an oxygen-containing gas and a fuel gas.
A storage container having a storage chamber for storing the cell stack,
A hollow oxygen-containing gas introduction member that supplies oxygen-containing gas below each fuel cell, and a first plate member that hangs down from above the storage chamber and faces a high temperature region, and the first plate member. It is provided with an oxygen-containing gas introducing member having a second plate member facing the hollow portion which is a flow path of the oxygen-containing gas.
In an arbitrary 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 in which the central portion of the fuel cell in the vertical direction is closer to the combustion chamber side than the upper end portion .
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 cell. The fuel cell according to claim 1 or 2, wherein the oxygen-containing gas introducing member has a rough surface having a higher surface roughness than a surface other than the outer surface of the first plate member. module. The storage container has a top plate of the storage chamber, and the storage container has a top plate.
The top plate includes an opening through which the oxygen-containing gas introducing member is inserted.
Any one of claims 1 to 3, wherein the shape of the joint portion to which the upper end of the oxygen-containing gas introducing member and the top plate are joined is any of a rectangular shape with rounded corners, an elongated hole shape, and an elliptical shape. The fuel cell module described in one. Any one of claims 1 to 4, wherein at least the first plate member of the oxygen-containing gas introducing member facing the cell stack is made of a metal plate rolled in a direction corresponding to the horizontal direction of the module. The fuel cell module described in one. The fuel cell module according to any one of claims 1 to 5, wherein the 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 introducing member,
The fuel cell module according to claim 4, further comprising a first thermocouple insertion member located between the first plate member and the second plate member of the oxygen-containing gas introducing member. The fuel cell module according to claim 7, wherein the lower portion of the first thermocouple insertion member has a bifurcated shape that is divided into two portions and hangs down. The fuel cell module according to claim 7, wherein the first thermocouple insertion member has a locking flange portion for locking 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 into which the thermocouple is inserted is provided.
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.
In the second thermocouple insertion member, the base is placed on the outer wall of the storage container so that the first through hole on the outer wall of the storage container and the second through hole are concentric with each other. Being done
The fuel cell module according to any one of claims 7 to 9, wherein the thermocouple is joined to the other end of the tubular member. The fuel cell module according to any one of claims 1 to 10.
Auxiliary equipment for operating the fuel cell module and
An outer case for accommodating the fuel cell module and the auxiliary equipment, and
A fuel cell device equipped with.

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