JP5299839B2 - Fuel cell module and fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell module for preventing oxidation of a current collector rod. <P>SOLUTION: The fuel cell module FC includes a fuel battery cell stack 21, a module container 8, a current collector rod 5 which takes out to the outside of the module container 8 electric power generated in a fuel battery cell 2, and an aggregate current collector member 4 which connects the fuel battery cell stack 21 and the current collector rod 5 and is connected to the fuel battery cell stack 21 throughout the longitudinal direction of the fuel battery cell 2. A heat radiation plate 33 which blocks transmission of heat generated inside the module container 8 to a projection portion of the current collector rod 5 projecting to the outside of the module container 8 is provided on the current collector rod 5. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a fuel cell module having fuel cells and a fuel cell including the same.

A solid oxide fuel cell using a ceramic material for a fuel cell has a high operating temperature of 700 to 1000 ° C., and exhaust heat generated when generating electric power can be used. Therefore, development as a highly efficient power generation system is progressing. In such a solid oxide fuel cell module used for such a solid oxide fuel cell, a fuel cell assembly composed of a plurality of fuel cells is usually contained in a metal container, and the fuel is contained in the container. A current collecting member for collecting electric power of the battery cell assembly and a current collecting rod for taking out electric power from the current collecting member to the outside of the container are provided (for example, see Patent Document 1).
JP 2007-141765 A

  In the solid oxide fuel cell module as described above, a metal material such as nickel is used for the current collecting member and the current collecting rod. In addition, since the current collecting rod is connected to a current collecting member in the container that has a high temperature at one end, it tends to be oxidized and deteriorated at the other end that is transferred to the high temperature and exposed to the outside. As a result, the electrical resistance of the current collecting rod increases, and the electric power taken out may decrease.

  Therefore, an object of the present invention is to provide a fuel cell module capable of preventing the oxidative deterioration of a current collecting member to be taken out of the container, and a fuel cell including the same.

  In order to achieve the above object, a fuel cell module according to the present invention comprises a fuel cell stack formed by electrically connecting a plurality of fuel cells operated by a fuel gas and an oxidant gas; A container for housing the fuel cell stack, a first current collecting member for taking out the electric power generated in the fuel cell to the outside of the container, the fuel cell stack and the first current collecting member A second current collecting member connected to the fuel cell stack over the longitudinal direction of the fuel cell, and the first current collecting member A heat dissipating part is provided for inhibiting the heat generated inside the container from being transmitted to the projecting portion of the first current collecting member projecting to the outside of the container.

  ADVANTAGE OF THE INVENTION According to this invention, the fuel cell module which can prevent the oxidation deterioration of the current collection member taken out to the exterior of a container, and a fuel cell provided with the same 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 accommodates a fuel cell stack formed by electrically connecting a plurality of fuel cells operated by a fuel gas and an oxidant gas, and the fuel cell stack. A first current collecting member for taking out the electric power generated in the fuel cell to the outside of the container, the fuel cell stack and the first current collecting member, and the fuel A second current collecting member connected to the fuel cell stack over the longitudinal direction of the battery cell, wherein the first current collecting member is generated inside the container. A heat dissipating part is provided for inhibiting heat from being transmitted to the protruding portion of the first current collecting member protruding outside the container.

  According to the present invention, the first current collecting member is provided with the heat radiating portion for inhibiting the heat generated in the container from being transmitted to the protruding portion. It becomes difficult to transmit to the protrusion part which protrudes from the container of the current collection member. Therefore, it becomes difficult for heat to be transmitted to the part where the first current collecting member is connected to other terminals outside the container, and oxidation deterioration in that part of the first current collecting member can be prevented.

  In the fuel cell module according to the present invention, it is also preferable that the heat radiating portion is provided in the container. According to this preferable aspect, since the heat generated in the container is radiated in the container, the heat can be radiated in a portion closer to the heat source, and heat transfer to the protruding portion can be more effectively suppressed. In addition, for example, since the heat radiating portion can be provided by stacking with other members in the container, the heat transfer to the protruding portion can be more effectively suppressed by effectively utilizing the space in the container.

  In the fuel cell module according to the present invention, it is preferable that the heat dissipating part is provided outside the container. According to this preferable aspect, since the heat generated in the container is radiated outside the container, the heat can be radiated in the region outside the container, and the heat transfer to the protruding portion can be more effectively suppressed. Further, for example, by arranging the heat dissipating part so that heat exchange is possible while insulating the heat dissipating part from the container, the temperature around the heat dissipating part can be equalized.

  In the fuel cell module according to the present invention, it is also preferable that the heat dissipating part is formed of a flat plate member. According to this preferred aspect, when the heat radiating part is in the container, the heat radiating part can be provided by laminating with other members in the container. Heat transfer to can be more effectively suppressed. In addition, if the heat radiating part is outside the container, it is placed along the outer wall of the container so that heat can be exchanged while insulating the heat radiating part from the container, so that the temperature around the heat radiating part is equalized. can do.

  In the fuel cell module according to the present invention, it is preferable that the heat dissipating part is formed of a metal sheet having a three-dimensional porous structure having a continuous skeleton. According to this preferable aspect, since the heat radiation area can be increased, heat can be efficiently radiated, and oxidation of the protruding portion can be more effectively prevented.

  In the fuel cell module according to the present invention, it is also preferable that the heat dissipating part is a heat exchanger that circulates a refrigerant in a space formed around the first current collecting member. According to this preferable aspect, the temperature of the first current collecting member can be adjusted by adjusting the temperature or the like of the refrigerant, so that the oxidation of the protruding portion can be more effectively prevented. Furthermore, the protruding portion can be made at a temperature lower than the temperature at which oxidation is prevented (for example, 200 ° C. or less for nickel), and even if the operator touches it, it prevents burns and other injuries and improves safety. .

  In the fuel cell module according to the present invention, it is also preferable that a heat shield portion is provided in a portion where the first current collecting member is taken out from the container. According to this preferable aspect, since the radiant heat and gas radiant heat in the container are shielded, heat radiation by the heat radiating portion can be promoted, and oxidation of the protruding portion can be more effectively prevented.

  Moreover, in a fuel cell provided with the fuel cell module according to the present invention, a fuel cell having the above-described effects can be provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic perspective view in which the fuel cell module FC according to this embodiment is partially broken. The fuel cell module FC is configured as a device for generating electric power by causing an electrochemical reaction between fuel gas and air (oxidant gas).

  The fuel cell module FC includes a fuel cell 2, an inter-stack current collecting member 3, an assembly current collecting member 4 (second current collecting member), a current collecting rod 5 (first current collecting member), and an air header. 6, an air supply pipe 7, a module container 8 (container), an insulating heat insulating member 9, and a heat insulating member 10.

The fuel battery cells 2 are configured as fuel battery cell stacks (not explicitly shown in FIG. 1) for every 12 of the 2 rows × 6 rows, and are housed in the module container 8. Each fuel cell 2 has a bottomed cylindrical shape, and is made of a ceramic material and forms a multilayer structure of an air electrode, a solid oxide electrolyte, and a fuel electrode from the inside to the outside of the cylinder. When air is in contact with the inner wall of the fuel cell 2, that is, the air electrode, and fuel gas is in contact with the outer wall, that is, the fuel electrode, the O ²⁻ ions move in the cell to cause an electrochemical reaction, causing a potential difference between the air electrode and the fuel electrode. As a result, electricity is generated. The electricity generated by the fuel cell 2 is collected by the inter-stack current collecting member 3, the assembly current collecting member 4 (second current collecting member), and taken out by the current collecting rod 5 (first current collecting member). Is done.

  The air supplied to each fuel cell 2 is supplied by distributing the air supplied to the air header 6 through the air supply pipe 7. In the present embodiment, three air headers 6 are provided, and an air supply pipe 7 is connected to each air header 6. The upstream side of the air supply pipe 7 is connected to an air supply source.

  The air header 6 serves to temporarily store and raise the temperature of air supplied to each fuel battery cell 2 and also to distribute air to each fuel battery cell 2. The air header 6 is also for distributing the flow path of the air supplied to each fuel cell 2 to a plurality of systems according to the number of the fuel cells 2, so that the air header 6 corresponds to the number of the fuel cells 2. The placement quantity is increased or decreased.

  The fuel gas supplied to each fuel cell 2 is supplied from below each fuel cell 2 (details will be described later).

  The fuel cell 2, the inter-stack current collecting member 3, the aggregate current collecting member 4, and the air header 6 are accommodated in a rectangular parallelepiped module container 8. The module container 8 is made of a heat-resistant alloy material such as Inconel or stainless steel because it becomes hot during operation. Moreover, it has a sealed structure in order to prevent fuel gas and air from leaking outside. Inside the module container 8, an insulating heat insulating member 9 is provided to insulate the fuel cell 2 and the module container 8 and keep the inside of the module container 8 warm. The insulating heat insulating member 9 is made of alumina fiber or the like. The module container 8 is further entirely covered with a heat insulating member 10 in order to keep the operating temperature stable.

  Then, the arrangement | positioning aspect of the fuel cell 2 is demonstrated, referring FIG. FIG. 2 is a cross-sectional view in the direction in which the fuel cell 2 side is seen from the air header 6 side in FIG. The fuel cell assembly 21 includes a plurality of fuel cell stacks 21a, 21b, and 21c. Each fuel cell stack 21a, 21b, 21c has 12 fuel cells 2, and each fuel cell 2 is arranged in 2 rows (x direction in the figure) × 6 rows (y direction in the figure). Has been.

  Each fuel cell 2 has a bottomed cylindrical shape, and is arranged with its opening 2a facing the air header 6 side. Each fuel cell 2 is electrically connected in 2 parallel × 6 series via an inter-cell current collecting member 13 and a conductive cell connecting member 14. The number and arrangement of the fuel cells 2 are appropriately selected according to the power generation capacity and the like.

  The fuel cell stacks 21a, 21b, and 21c are arranged in three rows (in the x direction in the figure) at a predetermined interval, and constitute a fuel cell assembly 21 having 36 fuel cells 2. ing. The respective fuel cell stacks 21a, 21b, and 21c are electrically connected in series via the inter-stack current collecting member 3. The assembly current collecting member 4 is connected to the ends of the fuel cell stacks 21a, 21c arranged at both ends of the fuel cell stacks 21a, 21b, 21c connected in series in this way. Since the aggregate current collecting member 4 is connected to the current collecting rod 5, electric power can be taken out through the current collecting rod 5. A pair of current collecting rods 5 are provided at target positions with the fuel cell stacks 21a, 21b, and 21c interposed therebetween. The current collecting rod 5 extends through the side wall of the module container 8 to the outside.

  Each of the fuel cell stacks 21a, 21b, and 21c is provided with an insulating plate 16 so as to contact a pair of side surfaces in which the fuel cells 2 are arranged in six rows. Further, a heat conduction plate 15 is disposed between adjacent insulating plates 16. A heat conducting plate 15 is also disposed between the fuel cell stacks 21a and 21c and the insulating heat insulating member 9. An insulating rod 11 is disposed between the heat conductive plate 15 and the inter-stack current collecting member 3 and the aggregate current collecting member 4.

  By arranging the heat conduction plate 15 in this way, even when the temperature of the fuel cell 2 is partially increased locally, heat easily moves from the high temperature portion to the low temperature portion via the heat conduction plate 15. Thus, the temperature distribution of the fuel cell 2 can be made uniform.

  Further, as described above, the insulating plate 16 and the insulating rod 11 are arranged, so that the electrical insulation between the heat conducting plate 15 and the fuel cell 2 and the current collecting member 3 between the heat conducting plate 15 and the stack 3 and Electrical insulation between the assembly current collecting member 4 is ensured.

  Subsequently, an arrangement mode of the fuel cells 2 and a supply mode of the fuel gas and air will be described with reference to FIG. FIG. 3 is a longitudinal sectional view of the fuel cell module FC and shows the inside of the module container 8.

  As shown in FIG. 3, a fuel gas dispersion chamber 17 for uniformly dispersing the fuel gas introduced into the module container 8 is disposed below the module container 8. In the fuel gas dispersion chamber 17, a pre-dispersion plate 18 for pre-dispersing the fuel gas is disposed. The preliminary dispersion plate 18 is made of alumina, for example, and the fuel gas vent holes 19 are uniformly formed. Further, a fuel gas dispersion material 20 made of, for example, Ni foam is disposed above the preliminary dispersion plate 18. A fuel gas supply pipe 22 is provided on the upstream side (lower side in the figure) of the fuel gas dispersion chamber 17, and the upstream side of the fuel gas supply pipe 22 is connected to a fuel gas supply source. Further, a fuel gas dispersion plate 23 is provided between the module container 8 and the fuel gas dispersion chamber 17 to allow the fuel gas to flow from the fuel gas dispersion chamber 17 to the module container 8. The fuel gas distribution plate 23 has a plurality of fuel gas supply holes 24 formed therein.

  A plurality of air introduction pipes (oxidant gas introduction pipes) 25 for introducing air into the air electrode of the fuel battery cell 2 are connected to the air header 6 disposed above the fuel battery cell assembly 21. . The air introduction pipe 25 is inserted into the pipe of the fuel cell 2, and its lower end extends to the vicinity of the bottom surface of the fuel battery cell 2.

  Further, a rectangular partition plate 26 extending in a direction perpendicular to the longitudinal direction of the fuel battery cell 2 is provided in the module container 8. The partition plate 26 is formed by laminating alumina fibers into a blanket shape. In the module container 8, a combustion chamber 27 is formed on the upper side partitioned by the partition plate 26, and a power generation chamber 28 is formed on the lower side. Here, the combustion chamber 27 mixes and burns the surplus fuel gas that did not contribute to the reaction in the power generation chamber 28 and the surplus air that did not contribute to the reaction in the cylinder of each fuel cell 3. Space. The power generation chamber 28 is a space for bringing the fuel gas introduced from the fuel gas supply hole 24 into contact with each fuel cell 2 and generating an electrochemical reaction with the air flowing in the pipe of each fuel cell 2 to generate power. It is.

  A plurality of cylindrical fuel gas discharge pipes 29 made of alumina, for example, for discharging exhaust fuel gas from the power generation chamber 28 to the combustion chamber 27 are inserted into the partition plate 26. A plurality of circular insertion holes 31 for inserting the fuel cells 3 are formed, and the opening side of each fuel cell 2 is fixed to the insertion holes 31.

  The heat insulating member 10 covering the module container 8 is covered with a metal outer container 32. One end of the current collecting rod 5 is connected to the aggregate current collecting member 4 provided inside the insulating heat insulating member 9. The other end of the current collecting rod 5 passes through the insulating heat insulating member 9, the module container 8 and the outer container 32. Pulled out to the outside. Further, inside the insulating heat insulating member 9, a heat radiating plate 33 (heat radiating portion) is provided that is connected to the current collecting rod 5 and radiates heat conducted to the current collecting rod 5.

  Next, the heat radiating plate 33 will be described in more detail. FIG. 4 is an exploded view for explaining the heat radiating plate 33. As shown in FIG. 4, the insulating heat insulating member 9 is formed in a multilayer structure, and a rectangular heat radiating plate 33 is provided over the entire layer. The heat radiating plate 33 is made of a heat-resistant metal such as nickel or an oxygen-free cylinder, and is electrically insulated from the module container 8 and the assembly current collecting member 4 by the insulating heat insulating member 9. Further, the heat radiating plate 33 is formed with a plurality of slits 33a, and it is possible to prevent the heated heat radiating plate 33 from being thermally expanded and deformed. Further, the current collecting rod 5 penetrates the heat radiating plate 33, and is in contact with the current collecting rod 5 in the penetrating portion. In this contact portion, heat transferred from the aggregate current collecting member 4 is transferred to the heat radiating plate 33 and radiated. The heat dissipated from the heat radiating plate 33 can soothe the periphery of the fuel cell assembly 21, and the density distribution of the fuel gas can be made uniform to improve the power generation performance. The same applies to the case where the radiator plate 33 is disposed outside the module container 8.

  It is also preferable to dispose the heat radiating plate 33b formed of the same material as the heat radiating plate 33 and having a different shape outside the module container 8. An example of this aspect is shown in FIG.

  As shown in FIG. 5, the module container 8 is formed with a cylindrical lead-out portion 34 that extends outward so as to cover the current collecting rod 5. In the lead-out portion 34, a convex portion 34a protruding in the radial direction is formed in the vicinity of the substantially central portion of the current collecting rod, and two heat radiating plates 33b are accommodated in the convex portion 34a. For this reason, if the heat radiating plate 33b as the heat radiating portion is not provided, the heat conducted from the end portion inside the module container 8 of the current collecting rod 5 to the end portion (projecting portion) outside the module container 8 is outside the module container 8. It is possible to efficiently dissipate heat before reaching the end. Therefore, the temperature of the end of the current collecting rod 5 outside the module container 8 is unlikely to rise, and oxidation can be prevented.

  Further, a heat shield member 35 (heat shield part) is provided between the heat radiating plates 33b and between the convex parts 34a. Further, an insulating tube 36 and a heat shield member 35 are provided around the current collecting rod 5 on the module container 8 side from the convex portion 34 a in the lead-out portion 34. By providing the heat shield member 35, the radiant heat and gas radiant heat of the fuel cell 2 in the power generation chamber 28 can be reduced, so that the heat radiation by the heat radiating plate 33b can be further promoted. The heat shield member 35 may be a felt-like ceramic sheet made of ceramic such as alumina or mullite.

  Further, an insulating seal part 37 is provided on the outer container 32 side from the convex part 34a in the lead-out part 34. The insulating seal portion 37 includes a packing 38 that sandwiches the edge of the lead-out portion 34, a packing restraining plate 39 that sandwiches the packing 38 from both sides, a packing pressing plate 41, and a nut 42 that presses the packing pressing plate 41 from the outside. The fuel gas in the container 9 is prevented from leaking. In particular, since the heat is radiated by the heat radiating plate 33, the insulating seal portion 37 is at a low temperature and low pressure, and the sealing performance can be improved.

  In addition, the convex part 34a is divided | segmented into two and comprised, in order to make construction of the heat sink 33b easy. The heat radiating plate 33 is formed in a shape such as a circle or a square, and the convex portion 34a is integrally formed by welding according to this shape. The packing 38 can be formed of a felt-like ring member made of ceramic such as alumina or mullite, or a heat-resistant rubber or resin member such as fluorine or silicon.

  Moreover, it is good also considering the heat sinks 33 and 33b as a porous metal sheet. FIG. 6 shows an electron micrograph of a porous metal sheet. As shown in FIG. 6, the porous metal sheet preferably has a void in the range of 0.3 to 1.2 mm in diameter, a more preferable lower limit is 0.35 mm, and a more preferable upper limit is 1. 0 mm. Moreover, it is preferable that a metal particle exists in the range of 35-120 micrometers in diameter, A more preferable minimum is 45 micrometers, and a more preferable upper limit is 100 micrometers. When the void diameter or the metal particle diameter is in the above range, the metal sheet has better steric strength. Moreover, the heat radiation area of a metal sheet and gas can be formed effectively. The metal sheet can be formed of nickel or an oxygen-free cylinder.

  It is also preferable to replace the heat radiating plate 33 with another heat radiating portion. A preferred example will be described with reference to FIG.

  As shown in FIG. 7, in the lead-out portion 34 in which the current collecting rod 5 is disposed, a convex portion 34 b that protrudes in the radial direction is formed in the vicinity of the substantially central portion of the current collecting rod 5. A cooling water chamber (space) 34c that is continuously hollow in the circumferential direction is formed in 34b. A cooling water supply pipe 43 and a cooling water drain pipe 44 are connected to the cooling water chamber 34c so that water can be circulated as a refrigerant and can function as a heat exchanger. In addition, a gas space 34d that is airtight with the outside of the outlet 34 is formed inside the cooling water chamber 34c, and is filled with fuel gas in the power generation chamber 28. By flowing water through the cooling water chamber 34c, the fuel gas in the gas space 34d is cooled, and the current collecting rod 5 is cooled via the cooled fuel gas. The refrigerant is not limited to water but may be a gas such as air. Further, the gas space 34 d is kept airtight by an insulating seal portion 37, and the insulating seal portion 37 includes an O-ring 45, an O-ring pressing plate 46, and a fixed cap 47. The O-ring 45 can be formed of a heat-resistant rubber such as fluorine or silicon, or a resin member.

  By adjusting the temperature of the refrigerant and the like, the temperature of the current collecting rod 5 can be adjusted, and oxidation of the current collecting rod 5 can be more effectively prevented. Furthermore, the temperature can be lower than the temperature at which the current collecting rod 5 is prevented from being oxidized (for example, nickel is preferably 200 ° C. or lower, more preferably 60 ° C. or lower). Prevents injury and improves safety.

  Next, the configuration of the fuel cell FCS using the fuel cell module FC will be described with reference to FIG. FIG. 8 is a block diagram showing the configuration of the fuel cell FCS. As shown in FIG. 8, the fuel cell FCS includes a fuel cell module FC, a fuel supply unit FP, an air supply unit AP, a water supply unit WP, a power extraction unit EP, and a control unit CS. . The fuel supply unit FP, the air supply unit AP, the water supply unit WP, and the power extraction unit EP constitute an auxiliary device AD of the fuel cell FCS.

  The fuel supply unit FP is a part that supplies fuel gas from a city gas pipe as a fuel supply source to the fuel cell module FC, and includes a fuel pump and an electromagnetic valve. The fuel gas supplied from the fuel supply unit FP is sent out to the fuel gas supply pipe 22.

  The air supply unit AP is a part that supplies air from the atmosphere as an air supply source to the fuel cell module FC, and includes an air blower and an electromagnetic valve. The air supplied from the air supply unit AP is sent out to the air supply pipe 8.

  The water supply unit WP is a part that supplies water to the fuel cell module FC from a water pipe serving as a water supply source, and includes a water pump and an electromagnetic valve. The water supplied from the water supply unit WP is sent out as water vapor inside the fuel cell module FC.

  The power extraction unit EP is a part that extracts electric power from the fuel cell module FC, and includes a power conversion device such as an inverter. The power extraction unit EP is connected to a current collecting rod (not shown), and is configured to send the converted power to a power supply destination.

  The control unit CS is a part for controlling each of the fuel supply unit FP, the air supply unit AP, the driving auxiliary device AD, and the power extraction unit EP, and includes a CPU and a ROM. The operation of the fuel cell module FC as described above is executed based on an instruction signal from the control unit CS.

  The operation of the fuel cell FCS configured as described above will be described. The power generation chamber 28 is heated to a temperature (700 to 1000 ° C.) at which an electrochemical reaction occurs. Air is supplied from the air supply unit AP to the air supply pipe 7 and stored in the air header 7. The stored air flows downward in the plurality of air introduction pipes 25 and flows out into the cylinder of the fuel cell 2 from the lower end. The outflowed air flows upward in the cylinder of the fuel cell 3. At this time, the air is brought into contact with the air electrode and subjected to the reaction. The air not consumed by the reaction reaches the combustion chamber 27 from the opening 2 a of the fuel cell 2.

  Further, the fuel gas is supplied from the fuel supply unit FP to the fuel gas supply pipe 22 and stored in the fuel gas dispersion chamber 17. The stored fuel gas is introduced into the power generation chamber 28 from a plurality of fuel gas supply holes 24 formed in the fuel gas dispersion plate 23, and flows upward while surrounding each fuel cell 2 in the power generation chamber 28. At this time, the fuel gas is brought into contact with the fuel electrode for reaction. The fuel gas not consumed by the reaction reaches the combustion chamber 27 through the fuel gas discharge pipe of the partition plate 26.

  Exhaust fuel gas and exhaust air that have reached the combustion chamber 27 are combusted using a predetermined ignition device, and exhaust gas is discharged out of the combustion chamber 27 from an exhaust gas pipe connected to the upper wall of the module container 9. . Since this exhaust gas becomes high temperature, it is used as a heat source for heating the power generation chamber 28.

  The electric power generated by the electrochemical reaction in the power generation chamber 28 is taken out to the outside by the power extraction unit EP through the assembly current collecting member and the electrode rod of the fuel cell assembly.

It is a section perspective view showing one embodiment of a fuel cell module concerning the present invention. 1 is a cross-sectional view showing an embodiment of a fuel cell module according to the present invention. It is a longitudinal section showing one embodiment of a fuel cell module concerning the present invention. It is an exploded view showing one embodiment of a fuel cell module according to the present invention. It is a fragmentary sectional view showing one embodiment of a fuel cell module concerning the present invention. It is a figure which shows the electron micrograph of a porous metal sheet. It is a fragmentary sectional view showing other embodiments of the fuel cell module concerning the present invention. It is a block diagram which shows the structure of a fuel cell.

Explanation of symbols

  2 ... Fuel cell, 3 ... Current collecting member between stacks, 4 ... Collecting current collecting member, 5 ... Current collecting rod, 6 ... Air header, 7 ... Air supply pipe, 8 ... Module container, 9 ... Insulating heat insulating member, DESCRIPTION OF SYMBOLS 10 ... Thermal insulation member, 13 ... Current collection member between cells, 14 ... Cell connection member, 21 ... Fuel cell assembly, 32 ... Outer container, FC ... Fuel cell module, FCS ... Fuel cell.

Claims (6)

A fuel cell stack formed by electrically connecting a plurality of fuel cells operated by a fuel gas and an oxidant gas;
A container for containing the fuel cell stack;
A first current collecting member for taking out the electric power generated in the fuel cell to the outside of the container;
A fuel comprising: a second current collecting member that connects the fuel cell stack and the first current collecting member and is connected to the fuel cell stack along a longitudinal direction of the fuel cell. A battery module,
The first current collecting member is provided with a heat dissipating part for inhibiting heat generated inside the container from being transmitted to the protruding portion of the first current collecting member protruding outside the container ,
Fuel cell module wherein the heat radiating portion, characterized that you have provided in the container. The fuel cell module according to claim 1, wherein the heat radiating portion is formed of a flat plate-like member. 2. The fuel cell module according to claim 1, wherein the heat radiating portion is formed of a metal sheet having a three-dimensional porous structure having a continuous skeleton. 2. The fuel cell module according to claim 1 , wherein the heat radiating unit is a heat exchanger that circulates a refrigerant in a space formed around the first current collecting member. The fuel cell module according to claim 1 , wherein a heat shield portion is provided in a portion where the first current collecting member is taken out from the container. A fuel cell comprising the fuel cell module according to any one of claims 1 to 5 .

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