JP5284050B2 - Fuel cell module - Google Patents

Description

  The present invention relates to a fuel cell module including a plurality of fuel cells that operate when fuel gas and oxidant gas flow from one end side to the other end side.

  In a fuel cell module including a plurality of fuel cells that operate when fuel gas and oxidant gas flow from one end side to the other end side, city gas or the like as reformed gas is supplied from the outside. City gas or the like is introduced into a reformer containing a reforming catalyst, reformed into a hydrogen-rich fuel gas, and then supplied to a plurality of fuel cells.

  In such a fuel cell module, the flow of the fuel gas flowing through the internal passage of the fuel cell can be adjusted by the form of the internal passage, but it is difficult to adjust the oxidant gas flowing outside the fuel cell. is there. An example of a fuel cell module that pays attention to this point is proposed in Patent Document 1 below. The technique described in the following Patent Document 1 is provided with protrusions intended to disturb the flow of oxidant gas flowing outside the fuel cell and allow the oxidant gas to sufficiently touch the side surface of the fuel cell. is there.

Further, as a technique focusing on a reformer in a fuel cell module, a technique described in Patent Document 2 below has been proposed.
JP 2007-234384 A JP 2002-289244 A

  By the way, even if a protrusion as described in Patent Document 1 is provided and turbulent flow is generated in the oxidant gas flowing on the side surface of the fuel cell, it passes through the side surface of the fuel cell and moves to the combustion part side. No action can be taken against the oxidant gas that flows out. For this reason, the oxidant gas is insufficient in the combustion section, and combustion with the fuel gas that reaches the combustion section through the internal passage of the fuel cell is not performed sufficiently, which may result in an incomplete combustion state.

  Accordingly, the present invention provides a fuel cell module that can reliably burn the remaining fuel gas and the remaining oxidant gas that have not contributed to the power generation reaction in a plurality of fuel cells, thereby avoiding an incomplete combustion state. The purpose is to do.

In order to solve the above problems, a fuel cell module according to the present invention includes a plurality of fuel cells that operate when fuel gas and oxidant gas flow from one lower end to the other upper end, and the plurality of fuel cells. A fuel tank for supplying the fuel gas, and the remaining fuel gas that did not contribute to the power generation reaction and the remaining oxidant gas in the plurality of fuel cells. A combustion portion formed on the other end side of the plurality of fuel cells, and a fuel gas which is disposed at a predetermined interval on the other end side of the plurality of fuel cells and reforms the reformed gas. A reformer, and a plurality of fuel cells, the gas tank, and a container in which the reformer is disposed, wherein the plurality of fuel cells have m rows × n Column (m> n) and The induction plates that are arranged in rows and are electrically connected to each other, and that form a flat plate for guiding the oxidant gas to the combustion part, are arranged from the inner wall of the container to the plurality of fuel cells. The plurality of fuel cells are disposed above the other end side so as to protrude along the direction in which the columns extend and extend in the direction in which the rows of the plurality of fuel cells extend , the amount of projection, the plurality of fuel cells longer than a distance between the outermost rows and the fuel cell to form the inner wall of the container of the cell, and a fuel gas outlet which communicates with the respective internal passages It is characterized by being shorter than the distance to the inner wall .

  According to the present invention, there is provided a fuel cell module capable of reliably burning the remaining fuel gas and the remaining oxidant gas that have not contributed to the power generation reaction in the plurality of fuel cells, thereby avoiding an incomplete combustion state. Can be provided.

  Prior to describing the best mode for carrying out the present invention, the function and effect of the present invention will be described.

  A fuel cell module according to the present invention communicates with a plurality of fuel cells that operate when fuel gas and oxidant gas flow from one end side to the other end side, and internal passages of each of the plurality of fuel cell units. The other end of the plurality of fuel cells so that the remaining fuel gas that did not contribute to the power generation reaction in the plurality of fuel cells and the remaining oxidant gas burned A reformer that is disposed on the other end side of the plurality of fuel cells at a predetermined interval and reforms the gas to be reformed into fuel gas; and the plurality of fuels A fuel cell module comprising: a battery cell; a gas tank; and a container in which the reformer is disposed, wherein the plurality of fuel battery cells are arranged in a matrix of m rows × n columns (m> n). Placed, each And a guide plate having a flat plate shape for guiding an oxidant gas to the combustion portion is projected from an inner wall of the container along a direction in which the rows of the plurality of fuel cells extend, and It arrange | positions so that the row | line | column of the said some fuel cell may extend along the extending direction, and the said guide plate covers the other end side of the fuel cell which forms the outermost row | line | column of the said some fuel cell. On the other hand, the fuel gas outlets communicating with the respective internal passages are not covered.

  In the present invention, the guide plate for inducing oxidant gas to the combustion part formed on the other end side of the plurality of fuel cells arranged in a matrix is formed into a flat plate shape, and the guide plate is used as a plurality of fuels. Since the battery cells protrude along the extending direction and extend along the direction in which the rows of the plurality of fuel cells extend, guidance is performed along the longitudinal direction of the plurality of fuel cells arranged in a matrix. A plate can be arranged to efficiently guide oxidant gas to the combustion section. Further, the guide plate is configured so as to cover the other end side of the fuel cells forming the outermost row of the plurality of fuel cells and not cover the fuel gas outlets communicating with the respective internal passages. Thus, the oxidant gas can be effectively supplied to the vicinity of the fuel gas outlet for supplying the fuel gas to the combustion section.

  In the fuel cell module according to the present invention, it is preferable that the fuel cell module further includes an upper support plate that holds the other end side of the plurality of fuel cells, and the guide plate protrudes so as to cover the upper support plate. In this preferred embodiment, since the upper support plate for holding the other end side of the fuel battery cell is provided, the direction in which the other end side of the fuel battery cell faces can be stabilized and combustion can be stabilized.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 is a perspective view showing a fuel cell module FC which is an embodiment of a fuel cell module according to the present invention, and shows a state where a cover member is removed. FIG. 2 is a cross-sectional view of the fuel cell module FC, and is a cross-sectional view in the vicinity of the center of the fuel cell module FC in the direction of arrow A in FIG. 3 is a cross-sectional view of the fuel cell module FC, and is a cross-sectional view in the vicinity of the center of the fuel cell module FC in the direction of arrow B in FIG. In FIGS. 2 and 3, the cross-sectional hatching is omitted.

  The cover member (not explicitly shown in FIGS. 1 and 3 is shown by a two-dot chain line in FIG. 2) has a rectangular parallelepiped shape by a front side wall, a pair of longitudinal side walls, a rear side wall, and a ceiling. Formed. A flange portion is formed at the lower end portion of each side wall, and a space sealed by the cover member and the base member 2 is formed by bringing the flange portion into contact with the base member 2. The cover member and the base member 2 are fixed by a bolt (not shown), and the bolt penetrates through an attachment hole provided in the cover member and is fixed by passing through an attachment hole 2a provided in the base member 2. Yes.

  The internal space formed by the cover member and the base member 2 is separated into two spaces by the partition plate 15. Among the spaces separated by the partition plate 15, the space where the fuel cell stack 400 is disposed is the power generation chamber 16. Of the spaces separated by the partition plate 15, the other space is an exhaust gas chamber 17. The inner wall surface of the cover member and the partition plate 15 are in close contact with each other directly or indirectly through some kind of contact member (for example, a flexible thin plate member).

  The partition plate 15 is placed on a support member 15 a provided on the base member 2 and is held at a predetermined distance from the base member 2. A pair of support members 15a are provided so as to support the partition plate 15 at both ends in the longitudinal direction. Accordingly, a gap 15b is formed between the pair of support members 15a and 15a. Exhaust gas that has passed through an exhaust gas passage (not shown) provided on the wall surface of the cover member is introduced into the exhaust gas chamber 17 through the gap 15b.

  The gas tank 3 is placed on the partition plate 15. Ten fuel cell stacks 400 are arranged side by side in the gas tank 3, and fuel gas is supplied from the gas tank 3 to the fuel cell 4 constituting each fuel cell stack 400.

  More specifically, an opening (not shown) having substantially the same shape as the lower support plate 400b of the fuel cell stack 400 is provided on the upper surface of the gas tank 3, and the lower support plate 400b is in close contact with the opening. Thus, the gas tank 3 and each fuel cell stack 400 are connected. Therefore, the fuel cells 4 constituting the fuel cell stack 400 are erected on the gas tank 3 with their tip portions facing upward.

  Each fuel battery cell 4 has a tubular shape, and a gas flowing from one end of the fuel battery cell 4 to the other end inside the pipe of the fuel battery cell 4 and outside the pipe from the one end to the other end. It operates by the action of the gas flowing to the part. In the present embodiment, the gas flowing in the pipe of the fuel battery cell 4 is a fuel gas such as reformed gas obtained by reforming hydrogen or hydrocarbon fuel, and the gas flowing outside the pipe of the fuel battery cell 4 contains oxygen. Contains oxidant gas such as air.

  Here, the fuel cell unit 30 including the fuel cells 4 will be described with reference to FIG. As shown in FIG. 4, the fuel cell unit 30 is a tubular structure formed by the fuel cells 4 and extending in the vertical direction, and includes a cylindrical fuel cell 4 and one end of the fuel cell 4. It has an inner electrode terminal 40 attached to 4a and an outer electrode terminal 42 attached to the other end 4b.

  The fuel cell 4 includes a cylindrical inner electrode layer 44, a cylindrical outer electrode layer 48, a cylindrical electrolyte layer 46 disposed between the electrode layers 44, 48, and an inner electrode. And a through flow channel 50 configured inside the layer 44. Further, an inner electrode exposed peripheral surface 44a in which the inner electrode layer 44 is exposed to the electrolyte layer 46 and the outer electrode layer 48 at one end 4a of the fuel cell 4, and the electrolyte layer 46 is an outer electrode layer. An electrolyte exposed peripheral surface 46 a exposed to 48 is provided. The other end 4b of the fuel cell 4 is configured by an outer electrode exposed peripheral surface 48a from which the outer electrode layer 48 is exposed. The through channel 50 functions as a fuel gas channel. The inner electrode exposed peripheral surface 44 a is also an inner electrode outer peripheral surface that is in electrical communication with the inner electrode layer 44. The outer electrode exposed peripheral surface 48 a is also an outer electrode outer peripheral surface that is in electrical communication with the outer electrode layer 48.

  The inner electrode layer 44 includes, for example, a mixture of Ni and zirconia doped with at least one selected from rare earth elements such as Ca, Y, and Sc, ceria doped with at least one selected from Ni and rare earth elements, And a mixture of Ni and lanthanum gallate doped with at least one selected from Sr, Mg, Co, Fe, and Cu. The electrolyte layer 46 includes, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, lanthanum gallate doped with at least one selected from Sr and Mg, Formed from at least one of the following. The outer electrode layer 48 is made of, for example, lanthanum manganite doped with at least one selected from Sr and Ca, lanthanum ferrite doped with at least one selected from Sr, Co, Ni, and Cu, Sr, Fe, Ni, and Cu. It is formed from at least one selected from samarium cobalt and silver doped with at least one selected. In this case, the inner electrode layer 44 becomes a fuel electrode, and the outer electrode layer 48 becomes an air electrode. The thickness of the inner electrode layer 44 is, for example, 1 mm, the thickness of the electrolyte layer 46 is, for example, 30 μm, the thickness of the outer electrode layer 48 is, for example, 30 μm, and the outer diameter is For example, it is 1-10 mm.

  The inner electrode terminal 40 is arranged so as to cover the inner electrode exposed peripheral surface 44a from the outside over the entire circumference and is electrically connected to the inner electrode terminal 40a, and a tubular shape extending from the main body portion 40a in the longitudinal direction of the fuel cell 4. Part 40b. The main body portion 40a and the tubular portion 40b are cylindrical and concentrically arranged, and the tube diameter of the tubular portion 40b is smaller than the tube diameter of the main body portion 40a. The tubular portion 40b has a connection channel 40c (fuel gas outlet) that communicates with the through channel 50 and communicates with the outside. A step portion 40 d between the main body portion 40 a and the tubular portion 40 b is in contact with the end surface 44 b of the inner electrode layer 44.

  The outer electrode terminal 42 is disposed so as to cover the outer electrode exposed peripheral surface 48a from the outside over the entire circumference and is electrically connected thereto, and a tubular shape extending from the main body portion 42a in the longitudinal direction of the fuel cell 4. Part 42b. The main body portion 42a and the tubular portion 42b are cylindrical and concentric, and the tube diameter of the tubular portion 42b is smaller than the tube diameter of the main body portion 42a. The tubular portion 42b has a connection channel 42c (fuel gas outlet) that communicates with the through channel 50 and communicates with the outside. A step portion 42 d between the main body portion 42 a and the tubular portion 42 b is in contact with the outer electrode layer 48, the electrolyte layer 46, and the end surface 44 c of the inner electrode layer 44 through the annular insulating member 52.

  The overall shape of the inner electrode terminal 40 and the overall shape of the outer electrode terminal 42 are the same. Further, the inner electrode terminal 40 and the fuel battery cell 4, and the outer electrode terminal 42 and the fuel battery cell 4 are sealed and fixed by a conductive sealing material 54 over the entire circumference. The sealing material 54 is various brazing materials including, for example, silver, a mixture of silver and glass, gold, nickel, copper, and titanium.

  The connection channel 40 c of the inner electrode terminal 40, the through channel 50 of the fuel cell 4, and the connection channel 42 c of the outer electrode terminal 42 constitute an in-pipe channel 30 c (internal channel) of the fuel cell unit 30.

  Next, the fuel cell stack 400 including the fuel cell unit 30 will be described with reference to FIG. The fuel cell stack 400 includes 16 fuel cell units 30, an upper support plate 400a, a lower support plate 400b, a connection member 400c, and an external terminal 400d.

  The upper support plate 400a and the lower support plate 400b are rectangular, and are through holes (fitting holes) that fit into the tubular portions 40b and 42b of the fuel cell unit 30 so as to support the fuel cell unit 30 in 2 columns × 8 rows, respectively. (Not shown in the figure). The upper support plate 400a and the lower support plate 400b are formed of an electrically insulating material, for example, formed of heat resistant ceramics. Specifically, it is preferable to use alumina, zirconia, spinel, forsterite, magnesia, titania or the like.

  The 16 fuel cell units 30 are arranged so that they are electrically connected in series. Specifically, the fuel cell units 30 are arranged so that the inner electrode terminals 40 of the adjacent fuel cell units 30 are alternately arranged on the upper side and the lower side. Further, a connection member 400c for electrically connecting the 16 fuel cell units 30 in series is provided. The connection member 400c electrically connects one adjacent inner electrode terminal 40 and one outer electrode terminal 42. Each of the inner electrode terminal 40 and the outer electrode terminal 42 at both ends of the 16 fuel cell units 30 connected in series is provided with an external terminal 400d for electrical connection with the outside. The connection member 400c and the external terminal 400d are made of, for example, a heat-resistant metal such as stainless steel, a nickel base alloy, or a chromium base alloy, or a ceramic material such as lanthanum chromite. The external terminals 400d of each fuel cell stack 400 are electrically connected in series, and are connected to the electrode rods 13 and 14 at both ends thereof.

  As described with reference to FIGS. 4 and 5, in the fuel cell stack 400, the end 4a of the fuel cell unit 30 where the inner electrode terminal 40 is provided and the end where the outer electrode terminal 42 is provided. The parts 4b are arranged so as to alternate with each other.

  Here, returning to FIGS. 1 to 3, the description of the fuel cell module FC will be continued. In the present embodiment, the reformer 5 is disposed so as to be located above the fuel cell stack 400. A pipe 6C and a pipe 6D are connected to the reformer 5, and the reformer 5 is positioned above the fuel cell stack 400 at a predetermined interval by the pipe 6C and the pipe 6D. Is retained. The pipe 6 </ b> C is a pipe for supplying city gas, air, and water vapor as reformed gas to the reformer 5, and is erected with respect to the partition plate 15. The pipe 6 </ b> D is a pipe for supplying the fuel gas reformed in the reformer 5 to the gas tank 3, and is erected with respect to the gas tank 3.

  The city gas and air supplied to the reformer 5 through the pipe 6C are introduced into the fuel cell module FC through the reformed gas supply pipe 6A. Further, the steam supplied to the reformer 5 through the pipe 6C is introduced into the fuel cell module FC through the steam supply pipe 6B. The to-be-reformed gas supply pipe 6A and the water vapor supply pipe 6B are connected to a mixing chamber 15c provided on the opposite side of the pipe 6C with the partition plate 15 in between. The city gas and air supplied from the reformed gas supply pipe 6A and the water vapor supplied from the steam supply pipe 6B are mixed in the mixing chamber 15c and supplied to the pipe 6C.

  Although not explicitly shown in FIGS. 1 to 3, in this embodiment, electromagnetic valves are attached to the reformed gas supply pipe 6 </ b> A and the steam supply pipe 6 </ b> B, respectively, and each electromagnetic valve is output from a CPU as a control unit. The ratio of the gas to be reformed, air, and water vapor supplied to the reformer 5 can be changed by opening and closing according to the instruction signal.

  City gas (which may be mixed with steam) and air (which may be only reformed gas) as reformed gas introduced into the reformer 5 are contained in the reformer 5. The reforming catalyst is reformed. The reformed fuel gas is supplied to the gas tank 3 through the pipe 6D. The portion where the pipe 6C is connected to the reformer 5 and the portion where the pipe 6D is connected to the reformer 5 are separated from each other in the vicinity of one end and the other end in the longitudinal direction. As a result, the fuel gas and air supplied to the reformer 5 can sufficiently touch the reforming catalyst.

  A reforming catalyst is enclosed in the reformer 5. As the reforming catalyst, a catalyst in which nickel is applied to the surface of the alumina sphere and a catalyst in which ruthenium is applied to the surface of the alumina sphere are appropriately used. These reforming catalysts are spheres.

  In the present embodiment, the flow path member 7 (container) is provided so as to cover the reformer 5 and each fuel cell stack 400. The flow path member 7 has air flow path outer walls 71 and 72, an air distribution chamber 73, air collecting chambers 74 and 75, air flow path pipes 76a, 76b, 77a and 77b, and outer walls 78 and 79. Yes. The flow path member 7 is formed such that the air flow path outer walls 71 and 72 are arranged in the longitudinal direction and the outer walls 78 and 79 are arranged in the short direction, respectively, and are formed into a box shape by these members. The flow path member 7 is erected on the partition plate 15 so as to cover the reformer 5 and each fuel cell stack 400. In the following description, the side that contacts the partition plate 15 of the flow path member 7 is defined as the lower side, and the side opposite to the lower side is described as the upper side.

  The air distribution chamber 73 is attached to the upper outside of the outer wall 79. That is, the air distribution chamber 73 is attached to the outside of the box-shaped body formed by the air flow path outer walls 71 and 72 and the outer walls 78 and 79 and above the short side. An air supply pipe 7A is connected to the air distribution chamber 73, and air as an oxidant gas is supplied. Air flow passages 76a, 76b, 77a, 77b are also connected to the air distribution chamber 73.

  The air flow path pipes 76a and 76b are arranged along the air flow path outer wall 71 on the inner side of the box-shaped body formed by the air flow path outer walls 71 and 72 and the outer walls 78 and 79 and above the longitudinal side. Yes. The air channel tube 76a is disposed on the air channel outer wall 71 side, and the air channel tube 76b is disposed on the inner side of the air channel tube 76a. One end of each of the air flow path pipes 76 a and 76 b passes through the outer wall 79 and is connected to the air distribution chamber 73, and the other end is connected to the air collecting chamber 74. Therefore, the air that has flowed into the air distribution chamber 73 flows through the air flow path pipes 76a and 76b into the air collecting chamber 74 and rejoins.

  The air flow path pipes 77a and 77b are arranged along the air flow path outer wall 72 on the inner side and the upper side of the box-shaped body formed by the air flow path outer walls 71 and 72 and the outer walls 78 and 79. Yes. The air flow path pipe 77a is disposed on the air flow path outer wall 72 side, and the air flow path pipe 77b is disposed on the inner side of the air flow path pipe 77a. One end of each of the air passage pipes 77 a and 77 b passes through the outer wall 79 and is connected to the air distribution chamber 73, and the other end is connected to the air collecting chamber 75. Accordingly, the air flowing into the air distribution chamber 73 flows through the air flow path pipes 77a and 77b into the air collecting chamber 75 and rejoins.

  The air collecting chambers 74 and 75 are attached to the upper inside of the outer wall 78. That is, the air collecting chambers 74 and 75 are attached to the inside of the box-like body formed by the air flow path outer walls 71 and 72 and the outer walls 78 and 79 and above the short side. The air collecting chamber 74 is disposed so as to be in close contact with the air flow path outer wall 71, and the air that has flowed into the air collecting room 74 is configured to flow out to the air flow path outer wall 71. On the other hand, the air collecting chamber 75 is disposed so as to be in close contact with the air flow path outer wall 72, and the air flowing into the air collecting chamber 75 is configured to flow out to the air flow path outer wall 72.

  Each of the air flow path outer walls 71 and 72 has a double wall structure, and is configured so that air can flow through each of them. More specifically, the air flow path outer wall 71 has a structure divided into three chambers from above, and is formed as a first chamber 711, a second chamber 712, and a third chamber 713 in order from the top. The air that flows from the air collecting chamber 74 flows into the first chamber 711, then flows into the second chamber 712, and then flows into the third chamber 713. Similarly, the air flow path outer wall 72 is also divided into three chambers from above, and is formed as a first chamber 721, a second chamber 722, and a third chamber 723 in this order from the top. The air flowing from the air collecting chamber 75 flows into the first chamber 721, then flows into the second chamber 722, and then flows into the third chamber 723.

  In the third chambers 713 and 723, a plurality of air inflow holes 713a and 723a are formed at predetermined intervals, respectively. The air inflow holes 713a and 723a are positions facing the gaps between the fuel cells 4 in the direction in which the fuel cell stacks 400 are connected, and the positions in the vertical direction with respect to the fuel cells 4 are substantially the same. A plurality of them are formed.

  The air flowing into the air flow path outer walls 71 and 72 is configured to flow into the vicinity of the fuel cell 4 in the power generation chamber 16 through the air inflow holes 713a and 723a. The air that has flowed through the air inflow holes 713 a and 723 a flows from the lower side to the upper side of each fuel cell 4 through the outside of the fuel cell 4. The air that reaches the upper side of each fuel battery cell 4 is burned together with the fuel gas that has passed through the pipe flow path of each fuel battery cell 4.

  Above each fuel cell stack 400 is a combustion section 18 in which air and fuel gas are mixed and burned. The fuel gas rises from the gas tank 3 through the in-pipe flow path 30 c of the fuel cell unit 30 toward the combustion unit 18. Further, the air flowing outside the fuel cell 4 also rises toward the combustion unit 18. An ignition device insertion hole 724 is provided in a portion of the air flow path outer wall 72 corresponding to the combustion portion 18, and an ignition device (not shown) for starting combustion of combustion gas and air is burned from the ignition device insertion hole 724. Projected to the portion 18. The ignition device mixes and burns fuel gas and air. The fuel cells 4 constituting the fuel cell stack 400 are heated from above by the combustion unit 18. Further, the air flowing in through the air inflow holes 713a and 723a is also heated by the combustion in the combustion section 18 while passing through the air passage tubes 76a, 76b, 77a and 77b and the air passage outer walls 71 and 72 as described above. Is done.

  In the case of the present embodiment, a flat guide plate FB is provided to effectively guide the air flowing outside the fuel cell 4 to the combustion unit 18. In the case of this embodiment, the fuel cells 4 are arranged in a matrix of 20 rows × 8 columns as a whole, and the guide plate FB protrudes from the inner wall of the flow path member 7 as a container along the direction in which the columns extend (see FIG. 2), and is configured to extend along the direction in which the rows are arranged (see FIG. 3). Further, the guide plate FB covers the other end side of the fuel cells 4 that form the outermost row of the fuel cells 4, and connects the connection flow path 40 c of the inner electrode terminal 40 as each fuel gas outlet and the outer side. The connection channel 42c of the electrode terminal 42 is configured not to be covered (see FIG. 2).

It is a perspective view of the fuel cell module which removes and shows a cover member. It is sectional drawing of the fuel cell module shown in FIG. It is sectional drawing of the fuel cell module shown in FIG. It is a figure for demonstrating a fuel cell unit. It is a figure for demonstrating a fuel cell stack.

Explanation of symbols

2: Base member 2a: Hole 3: Gas tank 4: Fuel cell 4a: End 4b: End 5: Reformer 6A: Reformed gas supply pipe 6B: Steam supply pipe 6C: Pipe 6D: Pipe 7: Flow Road member 7A: Air supply pipe 13, 14: Electrode rod 15: Plate 15a: Support member 15b: Gap 15c: Mixing chamber 16: Power generation chamber 17: Exhaust gas chamber 18: Combustion section 30: Fuel cell unit 30c: In-pipe flow Path 40: Inner electrode terminal 40a: Main body portion 40b: Tubular portion 40c: Connection flow path 40d: Step portion 42: Outer electrode terminal 42a: Main body portion 42b: Tubular portion 42c: Connection flow passage 42d: Step portion 44: Electrode layer 44a : Inner electrode exposed peripheral surface 44b: End surface 44c: End surface 46: Electrolyte layer 46a: Electrolyte exposed peripheral surface 48: Electrode layer 48a: Outer electrode exposed peripheral surface 50: Through channel 52: Insulating member 5 4: Sealing material 71: Air flow path outer wall 72: Air flow path outer wall 73: Air distribution chamber 74: Air collection chamber 75: Air collection chamber 76a, 76b, 77a, 77b: Air flow channel FC: Fuel cell module

Claims (2)

A plurality of fuel cells that operate when fuel gas and oxidant gas flow from one lower end to the other upper end;
A gas tank communicating with an internal passage of each of the plurality of fuel cells and supplying the fuel gas;
A combustion section formed on the other end side of the plurality of fuel cells so that the remaining fuel gas that did not contribute to the power generation reaction in the plurality of fuel cells and the remaining oxidant gas burn;
A reformer disposed at a predetermined interval on the other end side of the plurality of fuel cells, and reforming the reformed gas into fuel gas;
A plurality of fuel cells, a gas tank, and a container in which the reformer is disposed, and a fuel cell module comprising:
The plurality of fuel cells are arranged in a matrix such that m rows × n columns (m> n), and each is electrically connected,
A guide plate having a flat plate shape for inducing an oxidant gas to the combustion part protrudes from the inner wall of the container along a direction in which the rows of the plurality of fuel cells extend, and the plurality of fuel cells. Arranged above the other end side of the plurality of fuel cells so as to extend along the direction in which the row extends,
The amount of protrusion of the guide plate is longer than the distance between the fuel cells forming the outermost row of the plurality of fuel cells and the inner wall of the container, and the fuel gas communicates with each internal passage A fuel cell module characterized in that the distance is shorter than the distance between the air outlet and the inner wall . An upper support plate for holding the other end side of the plurality of fuel cells,
2. The fuel according to claim 1, wherein the guide plate is disposed at a position higher than the upper support plate , and a protruding amount of the guide plate is longer than a distance between the upper support plate and the inner wall. Battery module.

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