WO2019239457A1 - Power generation unit with solid oxide fuel cell - Google Patents

Abstract

[Problem] To provide a power generation unit that increases the natural frequency and can absorb displacement due to thermal expansion. [Solution] In a power generation unit 10, a coupling block 60 integrally couples manifolds 41a, 41b, 41c on the side of one end plate 108 of a solid oxide fuel cell 40 with respective manifolds 54a, 54b, 54c of devices (a fuel reformer 51, a catalyst combustor 53, and a heat exchanger 52) in a gas processing unit (GPU) 50. The solid oxide fuel cell, the coupling block, and the GPU are coupled in a rigid state. Another end plate 109 side of the solid oxide fuel cell is secured in a rigid state to a securing plate 30 by a first securing section 70. The fuel reformer 51 of the GPU is secured in a rigid state to the securing plate 30 by a second securing section 80. Displacement absorption sections 90 absorb displacement associated with thermal expansion of the devices in the GPU 50 in one direction.

Description

Power generation unit having a solid oxide fuel cell

The present invention relates to a power generation unit held on a fixed plate connected to a vehicle body.

In a case where a power generation unit having a fuel cell is mounted on a vehicle body, a technology is known in which the expansion due to thermal expansion of the fuel cell is regulated and the displacement is regulated with respect to vibration input accompanying traveling (see Patent Document 1). . A mounting structure for mounting a power generation unit described in Patent Document 1 on a vehicle includes a fixed support portion in which one end plate in the stacking direction of the fuel cells is held by the vehicle via a rubber mount, and the other end plate Has a movable support portion held by the vehicle so as to be movable in the stacking direction via the rubber mount.

JP 2001-143742 A

However, in the mount structure described in Patent Document 1, a rubber for preventing fluid leakage is arranged between the fixed support portion and the fuel cell. For this reason, the elongation due to the thermal expansion of the fuel cell cannot be sufficiently regulated, and the natural frequency of the fuel cell cannot be increased. The natural frequency of the fuel cell cannot deviate (increase) from the frequency range where the road load input is large, and the vibration associated with traveling may adversely affect the operation of the fuel cell.

An object of the present invention is to provide a power generation unit capable of increasing the natural frequency and absorbing displacement due to thermal expansion.

The present invention for achieving the above object is a power generation unit held on a fixed plate connected to a vehicle body, and includes a solid oxide fuel cell, a gas processing unit, and a connecting portion. The gas processing unit comprises: a fuel reformer that reforms fuel supplied to the solid oxide fuel cell; a combustor that burns unburned gas in the anode off-gas discharged from the solid oxide fuel cell; It includes three devices: a heat exchanger that exchanges heat between the exhaust gas discharged from the combustor and the oxidant gas supplied to the solid oxide fuel cell. The connecting portion integrally connects a manifold formed on one end plate side of the solid oxide fuel cell and each manifold of the device in the gas processing unit. The power generation unit includes a first fixing portion that fixes the other end plate side of the solid oxide fuel cell to the fixing plate in a rigid state. The power generation unit includes a second fixing portion that fixes at least one of the at least one device and the connecting portion in the gas processing unit to the fixing plate in a rigid state. The power generation unit includes a displacement absorbing unit that absorbs in one direction a displacement associated with thermal expansion of the device in the gas processing unit.

It is a perspective view which shows the state which connected the stationary plate with which the electric power generation unit was hold | maintained to the vehicle body. It is a perspective view shown in the state which isolate | separated the gas processing unit to which the connection part was connected, and the solid oxide fuel cell. It is a top view which shows the electric power generation unit which fastened the solid oxide form fuel cell of 1st Embodiment, and the gas processing unit. It is a front view which shows the electric power generation unit of 1st Embodiment. It is an exploded perspective view showing a solid oxide fuel cell. It is a disassembled perspective view of the cell unit shown in FIG. FIG. 7 is an exploded perspective view of the metal support cell assembly shown in FIG. 6. FIG. 8 is a partial cross-sectional view of the metal support cell assembly taken along line 8-8 in FIG. It is sectional drawing which shows the connection structure of a connection part and a solid oxide fuel cell. It is sectional drawing which shows the connection structure of a connection part and a gas processing unit. It is a front view which shows the 1st fixing | fixed part which fixes the other end plate side of a solid oxide fuel cell to a fixing plate in a rigid state. It is a side view which shows a 1st fixing | fixed part. It is a front view which shows the 2nd fixing | fixed part which fixes the apparatus in a gas processing unit to a fixing plate in a rigid state. It is a side view which shows a 2nd fixing | fixed part. It is a front view which shows the displacement absorption part which absorbs the displacement accompanying the thermal expansion in the apparatus of a gas processing unit in one direction. It is a side view which shows a displacement absorption part. It is a figure which shows typically an effect | action when a fuel cell stack thermally expands at the time of operation of a solid oxide fuel cell. It is a side view which shows the modification of a 1st fixing | fixed part. It is a top view which shows the electric power generation unit which fastened the solid oxide form fuel cell and gas processing unit of 2nd Embodiment. It is a front view which shows the electric power generation unit of 2nd Embodiment. It is a top view which shows the electric power generation unit which fastened the solid oxide fuel cell of 3rd Embodiment, and the gas processing unit. It is a front view which shows the electric power generation unit of 3rd Embodiment. It is a top view which shows the electric power generation unit which fastened the solid oxide fuel cell of 4th Embodiment, and the gas processing unit. It is a front view which shows the electric power generation unit of 4th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following description does not limit the meaning of the technical scope and terms described in the claims. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

(First embodiment)
FIG. 1 is a perspective view showing a state where a fixed plate 30 holding a power generation unit 10 is connected to a vehicle body, and FIG. 2 shows a gas processing unit 50 to which a connecting portion is connected and a solid oxide fuel cell 40. FIGS. 3 and 4 are a top view and a front view showing the power generation unit 10 in which the solid oxide fuel cell 40 and the gas processing unit 50 of the first embodiment are fastened.

As shown in FIGS. 1 to 4, the power generation unit 10 according to the first embodiment is generally a power generation unit 10 held on a fixed plate 30 connected to a vehicle body, and is a solid oxide fuel cell ( SOFC) 40 (hereinafter also referred to as “SOFC 40”), a gas processing unit (GPU) 50 (hereinafter also referred to as “GPU 50”), and a connecting block 60 (corresponding to a connecting portion) that connects the SOFC 40 and GPU 50 in a rigid state. And). The GPU 50 includes three devices: a fuel reformer 51, a catalytic combustor 53 corresponding to a combustor, and a heat exchanger 52. The connection block 60 integrally connects the manifolds 41 a, 41 b, 41 c formed on the one end plate 108 side of the SOFC 40 and the respective manifolds 54 a, 54 b, 54 c of the devices 51, 52, 53 in the GPU 50. The power generation unit 10 includes a first fixing portion 70 that fixes the other end plate 109 side of the SOFC 40 to the fixing plate 30 in a rigid state. The power generation unit 10 includes a second fixing portion 80 that fixes at least one of the at least one device 51 (52, 53) and the connection block 60 in the GPU 50 to the fixing plate 30 in a rigid state. The power generation unit 10 further includes a displacement absorbing unit 90 that absorbs the displacement accompanying the thermal expansion of the devices 51, 52, and 53 in the GPU 50 in one direction. In the first embodiment, the second fixing unit 80 fixes one device (the fuel reformer 51) in the GPU 50 to the fixed plate 30 in a rigid state. Moreover, the displacement absorption part 90 absorbs the displacement accompanying the thermal expansion of each of the two devices (the catalytic combustor 53 and the heat exchanger 52) in the GPU 50 in one direction. Details will be described below.

(Fixing plate 30)
As shown in FIG. 1, the fixing plate 30 is fixed in a rigid state by welding or bolt fastening to, for example, the side member 20 of the vehicle body. In the illustrated example, the fixing plate 30 is fixed to the side member 20 at four points. The number of points to be fixed can be appropriately changed in consideration of the rigidity (natural frequency) required for the power generation unit 10.

(Gas processing unit (GPU) 50)
As shown in FIG. 3, the GPU 50 of the power generation unit 10 includes three devices: a fuel reformer 51, a catalytic combustor 53 corresponding to a combustor, and a heat exchanger 52. The fuel reformer 51 reforms the fuel F supplied to the SOFC 40. The catalytic combustor 53 burns unburned gas in the anode off gas AOG discharged from the SOFC 40. The heat exchanger 52 exchanges heat between the exhaust gas EG discharged from the catalyst combustor 53 and the oxidant gas CG supplied to the SOFC 40.

The fuel reformer 51 is connected to a fuel F supply pipe 51a. The heat exchanger 52 is connected to an oxidant gas CG supply pipe 52a and an exhaust pipe 52b that discharges the exhaust gas EG after heat exchange. The catalyst combustor 53 and the heat exchanger 52 are connected by an introduction pipe 52 c that introduces the exhaust gas EG discharged from the catalyst combustor 53 into the heat exchanger 52.

(Connection block 60)
As shown in FIG. 3, the SOFC 40 has a manifold 41a for introducing a reformed fuel gas (anode gas AG) on the lower end plate 108 (corresponding to one end plate 108) side. In the SOFC 40, a manifold 41b for introducing a heated oxidant gas CG (cathode gas CG) is formed on the lower end plate 108 side. In the SOFC 40, a manifold 41c for leading the anode off gas AOG is formed on the lower end plate 108 side.

In the fuel reformer 51 of the GPU 50, a manifold 54a for leading out the reformed anode gas AG is formed. The heat exchanger 52 is formed with a manifold 54b for leading the heated cathode gas CG. The catalyst combustor 53 is formed with a manifold 54c for introducing the anode off gas AOG.

The connecting block 60 includes first to third passage portions 61 that connect the manifolds 41a, 41b, and 41c formed on the lower end plate 108 side of the SOFC 40 and the manifolds 54a, 54b, and 54c of the equipment in the GPU 50, 62 and 63 are formed in a block shape. The first passage 61 communicates the manifold 41 a of the SOFC 40 and the manifold 54 a of the fuel reformer 51. The second passage 62 communicates the manifold 41b of the SOFC 40 and the manifold 54b of the heat exchanger 52. The third passage portion 63 communicates the manifold 41 c of the SOFC 40 and the manifold 54 c of the catalytic combustor 53. As shown in FIG. 3, the anode gas AG flows through the first passage portion 61 as indicated by an arrow. The cathode gas CG flows through the second passage portion 62 as indicated by an arrow. The anode off gas AOG flows through the third passage portion 63 as indicated by an arrow.

The end face of the connecting block 60 on the SOFC 40 side is fixed to the SOFC 40 in a rigid state by welding or bolt fastening. The end surface of the connection block 60 on the GPU 50 side is fixed to a rigid state by welding or bolt fastening to each device of the GPU 50.

In this way, the connection block 60 integrally connects the manifolds 41a, 41b, 41c formed on the lower end plate 108 side of the SOFC 40 and the respective manifolds 54a, 54b, 54c of the devices 51, 52, 53 in the GPU 50. To do. By this connection block 60, the SOFC 40 and the GPU 50 are connected in a rigid state.

(Solid oxide fuel cell (SOFC) 40)
Next, the SOFC 40 of the power generation unit 10 will be described.

FIG. 5 is an exploded perspective view showing the SOFC 40. 6 is an exploded perspective view of the cell unit 100 shown in FIG. FIG. 7 is an exploded perspective view of the metal support cell assembly 110 shown in FIG. FIG. 8 is a partial cross-sectional view of the metal support cell assembly 110 taken along line 8-8 in FIG. For convenience of explanation, the XYZ orthogonal coordinate system is shown in FIGS. The X axis and the Y axis indicate the horizontal direction, and the Z axis indicates an axis parallel to the vertical direction.

The SOFC 40 (Solid Oxide Fuel Cell) shown in the figure is a fuel cell using an oxide ion conductor such as stabilized zirconia as an electrolyte.

As shown in FIG. 5, the SOFC 40 includes a fuel cell stack 40S configured by stacking a plurality of cell units 100 in the vertical direction, an upper current collector plate 106 stacked above the fuel cell stack 40S, and a fuel cell. And a lower current collecting plate 107 stacked below the stack 40S. The upper current collecting plate 106, the fuel cell stack 40S, and the lower current collecting plate 107 are sandwiched between the upper end plate 109 and the lower end plate 108. Each of the upper end plate 109 and the lower end plate 108 is fastened to the cover 105 with bolts. The lower end plate 108 corresponds to one end plate 108, and the upper end plate 109 corresponds to the other end plate 109. Hereinafter, the vertical direction of the fuel cell stack 40 </ b> S indicated by the Z axis in the drawing is also referred to as “stacking direction”. Hereinafter, main components of the SOFC 40 will be described.

[Cell unit 100]
As shown in FIG. 6, the cell unit 100 includes a separator 120 that partitions and forms a flow path portion 121 for gas to flow between the metal support cell assembly 110 and the electrolyte electrode assembly 111, a current collecting auxiliary layer 140 are sequentially stacked. In addition, a contact material that conducts and contacts the metal support cell assembly 110 and the current collecting auxiliary layer 140 may be disposed, or the current collecting auxiliary layer 140 may be omitted.

The cell unit 100 has a manifold part (not shown) for circulating and supplying the anode gas AG, and a plurality of seal parts 160 (FIG. 5) for sealing the periphery of the manifold part and restricting the gas flow. , (See FIG. 6). The illustrated fuel cell stack 40S is configured as an open cathode structure in which cathode gas freely flows outside the cell unit 100 (a portion surrounded by a broken line in FIGS. 6 and 7).

As shown in FIGS. 7 and 8, the metal support cell assembly 110 includes a plurality of (two in the illustrated example) metal support cells (Metal-Supported Cells: MSC) 110M arranged in the longitudinal direction Y, and a metal. And a cell frame 113 that holds the outer periphery of the support cell 110M.

The metal support cell 110M supports the electrolyte electrode assembly 111 in which the electrolyte layer 111E is sandwiched between a pair of electrodes 111A and 111C from both sides, and the electrolyte electrode assembly 111 from one side in the vertical direction. A metal support portion 112 made of metal. The metal support cell 110M is excellent in mechanical strength, quick startability, and the like as compared with the electrolyte support cell and the electrode support cell.

[Electrolyte electrode assembly 111]
As shown in FIGS. 7 and 8, the electrolyte electrode assembly 111 is configured by sandwiching an electrolyte layer 111E from both sides by an anode layer 111A and a cathode layer 111C which are a pair of electrodes.

The electrolyte layer 111E transmits oxide ions from the cathode layer 111C toward the anode layer 111A. The electrolyte layer 111E does not allow gas and electrons to pass while allowing oxide ions to pass through. Examples of the material for forming the electrolyte layer 111E include solid oxide ceramics such as stabilized zirconia doped with yttria, neodymium oxide, samarium, gadolinium, and scandium.

The anode layer 111A is a fuel electrode, and reacts an anode gas AG (for example, hydrogen) with oxide ions to generate an oxide of the anode gas AG and take out electrons. The anode layer 111A is resistant to a reducing atmosphere, transmits the anode gas AG, has high electrical (electron and ion) conductivity, and has a catalytic action that causes the anode gas AG to react with oxide ions. Examples of the material for forming the anode layer 111A include a material in which a metal such as nickel and an oxide ion conductor such as yttria-stabilized zirconia are mixed.

The cathode layer 111C is an oxidizer electrode, and reacts cathode gas (for example, oxygen contained in air) with electrons to convert oxygen molecules into oxide ions. The cathode layer 111C has resistance to an oxidizing atmosphere, allows the cathode gas to permeate, has high electrical (electron and ion) conductivity, and has a catalytic action to convert oxygen molecules into oxide ions. Examples of the material for forming the cathode layer 111C include oxides made of lanthanum, strontium, manganese, cobalt, and the like.

[Metal support part 112]
As shown in FIG. 7 and FIG. 8, the metal support part 112 supports the electrolyte electrode assembly 111 from the anode layer 111A side. By supporting the electrolyte electrode assembly 111 with the metal support part 112, even when the surface pressure distribution is slightly biased in the electrolyte electrode assembly 111, the damage to the electrolyte electrode assembly 111 due to bending can be suppressed. The metal support part 112 is a porous metal having gas permeability and electronic conductivity. Examples of the material for forming the metal support 112 include a corrosion resistant alloy, corrosion resistant steel, and stainless steel containing nickel and chromium.

[Cell frame 113]
As shown in FIGS. 7 and 8, the cell frame 113 holds the metal support cell 110M from the periphery. As shown in FIG. 7, the cell frame 113 has a plurality (two in the illustrated example) of openings 113 </ b> H arranged side by side along the longitudinal direction Y. A metal support cell 110M is disposed in the opening 113H of the cell frame 113. The outer periphery of the metal support cell 110M is joined to the inner edge of the opening 113H of the cell frame 113. As shown in FIG. 7, the cell frame 113 has anode gas inlets 113a, 113b, 113c through which the anode gas AG flows and anode gas outlets 113d, 113e. Examples of the material for forming the cell frame 113 include a metal whose surface is subjected to an insulation treatment.

[Separator 120]
The separator 120 is disposed between the metal support cells 110M adjacent in the stacking direction Z. The separator 120 has a flow path portion 121 in a region facing the electrolyte electrode assembly 111 of the metal support cell 110M. The flow path part 121 has an uneven shape that partitions and forms a gas flow path between the flow path part 121 and the electrolyte electrode assembly 111. The anode gas AG flows through the flow path part 121 facing the metal support part 112, and the cathode gas flows through the flow path part 121 facing the current collection auxiliary layer 140.

As shown in FIG. 6, the flow path portion 121 of the separator 120 is formed in a substantially linear shape so that the concavo-convex shape extends in the short-side direction X. Thereby, the flow direction of the gas flowing along the flow path part 121 is the short direction X. The separator 120 has anode gas inlets 120a, 120b, 120c through which the anode gas AG flows and anode gas outlets 120d, 120e. Examples of the material for forming the separator 120 include metal. Insulation treatment is applied to the region other than the flow path portion 121 of the separator 120.

[Current collection auxiliary layer 140]
The current collection auxiliary layer 140 is disposed between the metal support cell 110M and the separator 120, and forms an electric space between the metal support cell 110M and the separator 120 with a uniform surface pressure while forming a space through which the cathode gas passes. To assist. Examples of the current collecting auxiliary layer 140 include a wire mesh expanded metal. Also, if this characteristic or function can be provided by other elements, it can be omitted.

[Seal part 160]
The seal part 160 is formed from a material having heat resistance and sealability. As such a material, for example, thermiculite (registered trademark) whose main raw material is vermiculite (meteorite) can be mentioned.

(Connecting structure of connecting block 60 and SOFC 40)
FIG. 9 is a cross-sectional view showing a connection structure between the connection block 60 and the SOFC 40.

As shown in FIG. 9, the connecting block 60 is overlapped with the lower end plate 108, and is welded and integrated from the inside of the first to third passage portions 61, 62, 63. The SOFC 40 is formed by integrating the connection block 60 with the lower end plate 108 and then laminating the cell unit 100 on the lower end plate 108 with the connection block 60 integrated.

(Connecting structure of connecting block 60 and GPU 50)
FIG. 10 is a cross-sectional view showing a connection structure between the connection block 60 and the GPU 50.

As shown in FIG. 10, the GPU 50 has a flange member 55 in which manifolds 54a, 54b, 54c of the devices are formed. The flange member 55 is integrally connected to each of the devices 51, 52, and 53 by welding. The flange member 55 and the connection block 60 have a plurality of convex portions 55a and 60a for bolting each other. The flange member 55 is bolted to the connection block 60 integrated with the SOFC 40 and the plurality of convex portions 55a and 60a. Between the flange member 55 and the connection block 60, a gasket (not shown) for sealing the gas flowing through the first to third passage portions 61, 62, 63 is interposed.

(First fixing portion 70)
11A and 11B are a front view and a side view showing the first fixing portion 70 that fixes the other end plate 109 (upper end plate 109) side of the SOFC 40 to the fixing plate 30 in a rigid state.

As shown in FIGS. 3, 11A, and 11B, the power generation unit 10 includes a first fixing portion 70 that fixes the upper end plate 109 (corresponding to the other end plate 109) of the SOFC 40 to the fixing plate 30 in a rigid state. Have The first fixing portion 70 includes a first bracket 71 that is fixed to the fixing plate 30 at a plurality of points, and a second bracket 72 that is fixed to the upper end plate 109 of the SOFC 40 at a plurality of points. The first bracket 71 and the second bracket 72 are integrally formed and have an L shape as shown in FIG. 11A. The first bracket 71 is bolted to the fixing plate 30 at two points (FIG. 11B). The first bracket 71 is fixed via a heat insulating material 31 that blocks heat transfer from the SOFC 40 to the fixed plate 30. The second bracket 72 is bolted to the upper end plate 109 at four points (FIG. 11B). The number of points to be fixed can be one point. However, by using a plurality of fixing points, it is possible to resist the force in the rotational direction around the fixing points. Further, the number of points to be fixed can be appropriately changed in consideration of the rigidity (natural frequency) required for the power generation unit 10.

The first bracket 71 can be fixed to the fixed plate 30 by welding instead of bolt fastening.

(Second fixing portion 80)
12A and 12B are a front view and a side view showing the second fixing portion 80 that fixes the device in the GPU 50 to the fixing plate 30 in a rigid state.

3, FIG. 12A and FIG. 12B, the power generation unit 10 has a second fixing portion 80 that fixes one device in the GPU 50 to the fixing plate 30 in a rigid state. In the illustrated example, the fuel reformer 51 is fixed to the fixed plate 30 in a rigid state by the second fixing portion 80. The second fixing portion 80 includes a first plate 81 that is fixed to the fixing plate 30 at a plurality of points, a second plate 82 that is fixed to the lower surface side of the fuel reformer 51, and a first plate 81 A support 83 for connecting the second plate 82 is provided. The 1st plate 81, the 2nd plate 82, and the support | pillar 83 are integrally formed. The first plate 81 is bolted to the fixed plate 30 at four points (FIG. 3). The first plate 81 is fixed via a heat insulating material 31 that blocks heat transfer from the fuel reformer 51 to the fixed plate 30. The second plate 82 is fixed to the lower surface of the fuel reformer 51 by welding. Further, the multipoint number for fixing the first plate 81 can be appropriately changed in consideration of the rigidity (natural frequency) required for the power generation unit 10.

The first plate 81 can be fixed to the fixed plate 30 by welding instead of bolt fastening. The second plate 82 can be fixed to the lower surface of the fuel reformer 51 by bolt fastening instead of welding.

(Displacement absorber 90)
FIGS. 13A and 13B are a front view and a side view showing a displacement absorbing portion 90 that absorbs displacement due to thermal expansion in the devices 52 and 53 of the GPU 50 in one direction.

As shown in FIG. 3, FIG. 13A and FIG. 13B, the power generation unit 10 has a displacement absorbing portion 90 that absorbs displacement due to thermal expansion in the two devices 52 and 53 of the GPU 50 in one direction. In the illustrated example, in the catalytic combustor 53, the displacement accompanying thermal expansion is absorbed in one direction by the displacement absorbing unit 90. In the heat exchanger 52, the displacement accompanying the thermal expansion is absorbed in one direction by the displacement absorbing unit 90. The displacement absorbing unit 90 includes a slider 91 that guides displacement along one direction of the devices 52 and 53. The slider 91 is provided on a lower surface side of a pair of support legs 92 fixed to the fixed plate 30, a guide shaft 93 connected to the pair of support legs 92, and devices (catalyst combustor 53 and heat exchanger 52). And a guide bracket 94 fixed to the opposite side. The pair of support legs 92 are separated along one direction in which thermal expansion is absorbed. The guide shaft 93 extends along one direction that absorbs thermal expansion. The guide shaft 93 is connected to the pair of support legs 92 through the guide bracket 94. Each of the support legs 92 is bolted to the fixing plate 30 at two points (FIG. 3). Each of the support legs 92 is fixed via a heat insulating material 31 that blocks heat transfer from the devices (catalyst combustor 53 and heat exchanger 52) to the fixed plate 30. The guide bracket 94 is fixed to the lower surface of the equipment (catalyst combustor 53 and heat exchanger 52) by welding.

Each of the support legs 92 can be fixed to the fixing plate 30 by welding instead of bolt fastening. The guide bracket 94 can be fixed to the lower surface of the device (catalyst combustor 53 and heat exchanger 52) by bolt fastening instead of welding.

The displacement absorber 90 absorbs the displacement accompanying the thermal expansion in a specific direction. Here, one direction is a horizontal direction and a direction in which the SOFC 40 and the GPU 50 face each other. One direction is the left-right direction in the vehicle body.

In addition, depending on the form in which the fixed plate 30 is connected to the vehicle body, one direction can be set to the front-rear direction in the vehicle body.

The forming material of the connection block 60, the first fixing portion 70, and the second fixing portion 80 is the same as the forming material of the fixing plate 30. The forming material is, for example, a stainless material. The material for forming the lower end plate 108 and the upper end plate 109 of the SOFC 40 may be the same as the material for forming the fixed plate 30.

Since the forming material of the fixing plate 30 and the forming material of each mount (the connecting block 60, the first fixing portion 70, and the second fixing portion 80) are the same material, the stress due to thermal expansion can be reduced. For this reason, the specification of a displacement absorption function can be simplified.

(Function)
The operation of the first embodiment will be described. In the power generation unit 10 of the first embodiment, the SOFC 40 and the GPU 50 are connected in a rigid state via the connection block 60. In this state, the SOFC 40 is fixed to the fixed plate 30 in a rigid state by the first fixing portion 70 on the upper end plate 109 side. The fuel reformer 51 of the GPU 50 is fixed to the fixed plate 30 in a rigid state by the second fixing unit 80. When the power generation unit 10 is in operation, the devices 51, 52, and 53 of the SOFC 40 and the GPU 50 are at a high temperature. In the GPU 50 (the catalyst combustor 53 and the heat exchanger 52), the displacement accompanying the thermal expansion is guided and absorbed in one direction by the displacement absorbing portion 90 having the slider 91.

Since the power generation unit 10 is held on the fixed plate 30 connected to the vehicle body, vibration associated with traveling is input. The SOFC 40, the connection block 60, and the GPU 50 that are connected in the rigid state are fixed to the fixed plate 30 in the rigid state by the first fixing unit 70 and the second fixing unit 80. For this reason, the natural frequency of the power generation unit 10 increases, and the resonance frequency increases. As a result, it is possible to suppress the natural frequency of the power generation unit 10 from deviating (increasing) from the frequency range (less than 50 Hz) where the road load input is large, and the vibration caused by traveling adversely affecting the operation of the power generation unit 10. .

Since the natural frequency of the power generation unit 10 increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state can be improved.

The displacement absorbing portion 90 having the slider 91 guides and absorbs the displacement accompanying the thermal expansion of the devices (the catalytic combustor 53 and the heat exchanger 52) in the GPU 50 in one direction. For this reason, even if each apparatus 51,52,53 of GPU50 is thermally expanded, the stress by thermal expansion can be reduced.

The connection block 60 integrates manifolds 41a, 41b, 41c of the SOFC 40 and manifolds 54a, 54b, 54c of the devices 51, 52, 53 of the GPU 50. Thereby, the dimension between SOFC40 and GPU50 can be made small, and the whole power generation unit 10 can be reduced in size.

FIG. 14 is a diagram schematically showing an action when the SOFC 40 thermally expands during operation of the power generation unit 10.

The power generation unit 10 does not have a structure that absorbs the thermal expansion of the SOFC 40. However, the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state are provided with at least three fixed points. Thereby, the primary natural frequency can ensure sufficient rigidity. Further, in a laminated body such as SOFC 40, the surface pressure sensitivity between the laminated layers particularly affects the primary mode. By increasing the rigidity of the lower end plate 108 integrally with the connecting block 60, the vibration resistance can be improved by increasing the load within the range in which the creep life is established. The inside of both current collector plates becomes a compressive stress during expansion, thereby suppressing the occurrence of creep.

By not providing a structure for absorbing the thermal expansion of the SOFC 40 and minimizing the number of mounts, the entire power generation unit 10 can be reduced in size.

As described above, the power generation unit 10 according to the first embodiment is the power generation unit 10 held on the fixed plate 30 connected to the vehicle body, and includes the SOFC 40 and the GPU 50. The power generation unit 10 includes a connection block 60 that integrally connects the manifolds 41a, 41b, and 41c formed on the lower end plate 108 side of the SOFC 40 and the manifolds 54a, 54b, and 54c of the equipment in the GPU 50. The power generation unit 10 includes a first fixing portion 70 that fixes the upper end plate 109 side of the SOFC 40 to the fixing plate 30 in a rigid state. The power generation unit 10 includes a second fixing unit 80 that fixes the fuel reformer 51 in the GPU 50 to the fixed plate 30 in a rigid state. The power generation unit 10 includes a displacement absorbing unit 90 that absorbs in one direction a displacement (elongation) associated with thermal expansion of the devices (the catalytic combustor 53 and the heat exchanger 52) in the GPU 50.

With this configuration, the SOFC 40, the connection block 60, and the GPU 50 connected in a rigid state are fixed in a rigid state to the fixed plate 30 by the first fixing unit 70 and the second fixing unit 80. For this reason, the natural frequency of the power generation unit 10 increases, and the resonance frequency increases. As a result, it is possible to suppress the natural frequency of the power generation unit 10 from deviating (rising) from the frequency range where the road surface load input is large, and the vibration accompanying the traveling adversely affecting the operation of the power generation unit 10. Since the natural frequency of the power generation unit 10 increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state is improved. Since displacement due to thermal expansion of the devices (catalyst combustor 53 and heat exchanger 52) in the GPU 50 is absorbed in one direction by the displacement absorbing unit 90, each device 51, 52, 53 of the GPU 50 is thermally expanded. The stress due to thermal expansion can be reduced. Therefore, according to the first embodiment, it is possible to provide the power generation unit 10 that can increase the natural frequency and absorb the displacement due to thermal expansion.

Furthermore, since the manifolds 41a, 41b, 41c of the SOFC 40 and the manifolds 54a, 54b, 54c of each device of the GPU 50 are integrated by the connecting block 60, the dimension between the SOFC 40 and the GPU 50 can be reduced, and the entire power generation unit 10 can be reduced. Can be miniaturized. In addition, the number of mounts can be minimized, and from this point, the entire power generation unit 10 can be downsized.

The connection block 60 includes first to third passage portions 61 that connect the manifolds 41a, 41b, and 41c formed on one end plate 108 side of the SOFC 40 and the manifolds 54a, 54b, and 54c of the equipment in the GPU 50. , 62, 63 are formed in a block shape, and are welded and joined to one end plate 108 from the inside of the first to third passage portions 61, 62, 63. The SOFC 40 is formed by stacking the cell unit 100 on one end plate 108 in which the connection block 60 is integrated.

This configuration allows the GPU 50 to be easily integrated into the SOFC 40.

The first fixing part 70 has a first bracket 71 fixed to the fixing plate 30 at a plurality of points.

This configuration makes it possible to increase the natural frequency of the SOFC 40.

The first fixing unit 70 has second brackets 72 that are fixed to the lower end plate 108 of the SOFC 40 at a plurality of points.

This configuration makes it possible to increase the natural frequency of the SOFC 40.

The displacement absorbing unit 90 has a slider 91 that guides displacement along one direction of the devices (catalytic combustor 53 and heat exchanger 52) in the GPU 50.

With this configuration, the displacement (elongation) associated with the thermal expansion of the equipment (catalytic combustor 53 and heat exchanger 52) in the GPU 50 is guided by the slider 91 and absorbed in one direction. As a result, stress due to thermal expansion can be reduced.

One direction is the horizontal direction and the direction in which the SOFC 40 and the GPU 50 face each other.

With this configuration, it is possible to effectively absorb displacement (elongation) associated with thermal expansion of the devices (catalytic combustor 53 and heat exchanger 52) in the GPU 50. Moreover, since it absorbs in a horizontal direction, compared with the case where the space for absorption is set to the vertical direction, a vehicle interior space is not narrowed.

The forming material of the connection block 60, the first fixing portion 70, and the second fixing portion 80 is the same as the forming material of the fixing plate 30.

With this configuration, since the forming material of the fixing plate 30 and the forming material of each mount (the connecting block 60, the first fixing portion 70, and the second fixing portion 80) are the same kind of material, stress due to thermal expansion Can be reduced. For this reason, the specification of a displacement absorption function can be simplified.

(Modification of the 1st fixing | fixed part 70)
FIG. 15 is a side view showing a modified example of the first fixing portion 70.

In the first embodiment, the first fixing part 70 has a second bracket 72 that is bolted and fixed to the upper end plate 109 of the SOFC 40 at a plurality of points (four points) (FIG. 11B). The first fixing unit 70 is not limited to this case.

As shown in FIG. 15, the modified first fixing portion 70 has a second bracket 72 fixed to the upper end plate 109 of the SOFC 40 by welding 73. The second bracket 72 is contacted so as to suppress the surface of the upper end plate 109, and the outer peripheral portion 72a is fixed by welding. The size of the second bracket 72 is set to a size that can suppress the surface of the upper end plate 109 to the maximum. Welding the outer peripheral portion 72a is equivalent to fixing at a plurality of continuous points. For this reason, the natural frequency of the SOFC 40 can be further increased.

As described above, the modified second bracket 72 is fixed to the upper end plate 109 of the SOFC 40 by welding 73.

This configuration can further increase the natural frequency of the SOFC 40.

(About modification of the second fixing portion 80 and the displacement absorbing portion 90)
The second fixing unit 80 only needs to fix at least one of the at least one device 51, 52, 53 and the connection block 60 in the GPU 50 to the fixing plate 30 in a rigid state. Furthermore, the displacement absorption part 90 should just be what can absorb the displacement accompanying the thermal expansion of apparatus 51,52,53 in GPU50 in one direction. The configuration of the second fixed portion 80 and the displacement absorbing portion 90 can be changed as appropriate as long as the effect of increasing the natural frequency of the power generation unit 10 and absorbing the displacement due to thermal expansion can be exhibited. Specifically, which part is fixed to the fixed plate 30 in a rigid state by the second fixing unit 80 and which displacement due to thermal expansion of the GPU 50 is absorbed by the displacement absorbing unit 90 depends on the above-described action. As long as the effect can be exhibited, it can be appropriately changed. Hereinafter, the second to fourth embodiments will be described.

(Second Embodiment)
16 and 17 are a top view and a front view showing the power generation unit 10A of the second embodiment.

As shown in FIGS. 16 and 17, in the power generation unit 10 </ b> A of the second embodiment, the connection block 60 is fixed to the fixed plate 30 in a rigid state by the second fixing portion 80. In this respect, the second fixing unit 80 is different from the first embodiment in which one device (the fuel reformer 51) in the GPU 50 is fixed to the fixing plate 30 in a rigid state. Further, all the devices (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) in the GPU 50 have a displacement absorbing unit 90 having a slider 91. This is different from the first embodiment in which one device (fuel reformer 51) in the GPU 50 is fixed to the fixed plate 30 in a rigid state.

In the second embodiment, the second fixing portion 80 has a flange portion 84 that fixes the connection block 60 to the fixing plate 30. The flange portion 84 is fixed to the fixed plate 30 in a rigid state by welding. The flange portion 84 can be fixed to the fixed plate 30 in a rigid state by bolt fastening instead of welding. All the devices 51, 52, 53 in the GPU 50 are not directly fixed to the fixed plate 30 in a rigid state. However, the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state are rigidly fixed to the fixed plate 30 by the first fixing unit 70, and the connection block 60 is rigidly fixed to the fixed plate 30 by the second fixing unit 80. Fixed to state. For this reason, the natural frequency of the power generation unit 10A can be sufficiently increased.

All devices in the GPU 50 (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) have a displacement absorbing portion 90 having a slider 91. In each of the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52, the displacement accompanying the thermal expansion is guided and absorbed in one direction by the displacement absorbing portion 90 having the slider 91.

The operation of the second embodiment will be described. Since the power generation unit 10A is held on the fixed plate 30 connected to the vehicle body, vibration associated with traveling is input. The SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state are fixed in a rigid state to the fixed plate 30 by the first fixing unit 70, and the connection block 60 is fixed to the fixed plate 30 by the second fixing unit 80. It is fixed. For this reason, the natural frequency of the power generation unit 10A increases and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10A deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10A.

Since the natural frequency of the power generation unit 10A increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state can be improved.

The displacement absorbing unit 90 having the slider 91 guides and absorbs the displacement accompanying the thermal expansion of the devices (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) in the GPU 50 in one direction. For this reason, even if each apparatus of GPU50 thermally expands, the stress by thermal expansion can be reduced.

As described above, the power generation unit 10 </ b> A of the second embodiment fixes the connection block 60 to the fixed plate 30 in the rigid state by the second fixing portion 80. All the devices in the GPU 50 (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) have a displacement absorbing unit 90.

This configuration provides the same operational effects as the power generation unit 10A of the first embodiment. That is, the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state are rigidly fixed to the fixed plate 30 by the first fixing unit 70 and the connection block 60 is rigidly fixed to the fixed plate 30 by the second fixing unit 80. Fixed to state. For this reason, the natural frequency of the power generation unit 10A increases and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10A deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10A. Since the natural frequency of the power generation unit 10A increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 connected in a rigid state is improved. Since the displacement associated with the thermal expansion of the devices (fuel reformer 51, catalytic combustor 53, and heat exchanger 52) in the GPU 50 is absorbed in one direction by the displacement absorber 90, each device of the GPU 50 is thermally expanded. Also, stress due to thermal expansion can be reduced.

(Third embodiment)
18 and 19 are a top view and a front view showing the power generation unit 10B of the third embodiment.

The third embodiment is different from the first embodiment and the second embodiment in that the configuration of the displacement absorber 90 is modified.

As shown in FIGS. 18 and 19, in the power generation unit 10 </ b> B of the third embodiment, as in the first embodiment, the SOFC 40 is rigidly fixed to the fixed plate 30 by the first fixing portion 70. The device (fuel reformer 51) is fixed to the fixed plate 30 in a rigid state by the second fixing portion 80. Similarly to the first embodiment, the two devices (the catalytic combustor 53 and the heat exchanger 52) in the GPU 50 have a displacement absorbing unit 90 having a slider 91. In each of the catalytic combustor 53 and the heat exchanger 52, the displacement accompanying the thermal expansion is guided and absorbed in one direction by the displacement absorbing portion 90 having the slider 91.

Further, in the third embodiment, the displacement absorbing unit 90 is disposed between the equipment bodies 56a and 56b of the equipment (the fuel reformer 51 and the heat exchanger 52) in the GPU 50 and the manifolds 54a and 54b of the equipment 51 and 52. And a bellows member 95 that expands and contracts along one direction. With respect to the heat exchanger 52, the displacement due to thermal expansion is absorbed in one direction by both the displacement absorbing portion 90 having the slider 91 and the displacement absorbing portion 90 having the bellows member 95.

The operation of the third embodiment will be described. Since the power generation unit 10B is held on the fixed plate 30 connected to the vehicle body, vibration associated with traveling is input. In the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state, the SOFC 40 is fixed in a rigid state to the fixed plate 30 by the first fixing unit 70, and one device (the fuel reformer 51) in the GPU 50 is the second fixing unit. 80 is fixed to the fixed plate 30 in a rigid state. For this reason, the natural frequency of the power generation unit 10B increases and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10B deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10B.

Since the natural frequency of the power generation unit 10B increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state can be improved.

The displacement absorbing portion 90 having the slider 91 guides and absorbs the displacement accompanying the thermal expansion of the devices (the catalytic combustor 53 and the heat exchanger 52) in the GPU 50 in one direction. Moreover, the displacement absorption part 90 which has the bellows member 95 expands-contracts and absorbs the displacement accompanying the thermal expansion of the apparatus (fuel reformer 51 and the heat exchanger 52) in GPU50 in one direction. For this reason, even if each apparatus of GPU50 thermally expands, the stress by thermal expansion can be reduced.

As described above, in the power generation unit 10B of the third embodiment, the displacement absorbing unit 90 is disposed between the equipment body of the equipment (the fuel reformer 51 and the heat exchanger 52) in the GPU 50 and the manifold of the equipment. And a bellows member 95 that expands and contracts along one direction.

By configuring in this way, the same effects as the power generation unit 10B of the first embodiment can be obtained. That is, the SOFC 40, the connection block 60, and the GPU 50 that are connected in the rigid state are fixed in the rigid state to the fixed plate 30 by the first fixing unit 70, and the device (fuel reformer 51) in the GPU 50 is the second fixing unit. 80 is fixed to the fixing plate 30 in a rigid state. For this reason, the natural frequency of the power generation unit 10B increases and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10B deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10B. Since the natural frequency of the power generation unit 10B increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state is improved. Displacement (elongation) accompanying thermal expansion of the equipment (catalytic combustor 53 and heat exchanger 52) in the GPU 50 is guided by the slider 91 and absorbed in one direction. Further, the displacement (elongation) associated with the thermal expansion of the devices (fuel reformer 51 and heat exchanger 52) in the GPU 50 is absorbed in one direction by the expansion and contraction of the bellows member 95. As a result, stress due to thermal expansion can be reduced.

(Fourth embodiment)
20 and 21 are a top view and a front view showing the power generation unit 10C of the fourth embodiment.

The second fixing unit 80 only needs to fix at least one of the GPU 50 and at least one of the connecting blocks 60 to the fixing plate 30 in a rigid state.

As shown in FIGS. 20 and 21, the power generation unit 10 </ b> C of the fourth embodiment includes all the devices (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) in the GPU 50 by the second fixing unit 80. Both of the connecting blocks 60 are fixed to the fixing plate 30 in a rigid state.

In the fourth embodiment, the displacement absorbing unit 90 is disposed between the equipment bodies 56a and 56b of the equipment (the fuel reformer 51 and the heat exchanger 52) in the GPU 50 and the manifolds 54a and 54b of the equipment 51 and 52. It has a bellows member 95 that expands and contracts along one direction.

The operation of the fourth embodiment will be described. Since the power generation unit 10C is held on the fixed plate 30 connected to the vehicle body, vibration associated with traveling is input. The SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state are fixed in a rigid state to the fixed plate 30 by the first fixing unit 70, and the connection block 60 is fixed to the fixed plate 30 by the second fixing unit 80. All the devices in the GPU 50 (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) are fixed to the fixed plate 30 in a rigid state by the second fixing unit 80. For this reason, the natural frequency of the power generation unit 10C increases, and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10C deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10C.

Since the natural frequency of the power generation unit 10C increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 that are connected in a rigid state can be improved.

The displacement absorbing portion 90 having the bellows member 95 absorbs the displacement accompanying the thermal expansion of the equipment (the fuel reformer 51 and the heat exchanger 52) in the GPU 50 in one direction. For this reason, even if each apparatus 51 and 52 of GPU50 is thermally expanded, the stress by thermal expansion can be reduced.

As described above, the power generation unit 10 </ b> C of the fourth embodiment is configured such that both the equipment (the fuel reformer 51, the catalytic combustor 53, and the heat exchanger 52) and the connection block 60 in the GPU 50 are connected by the second fixing unit 80. Is fixed to the fixing plate 30 in a rigid state. The displacement absorbing unit 90 is disposed between the device bodies 56a and 56b of the devices (the fuel reformer 51 and the heat exchanger 52) in the GPU 50 and the manifolds 54a and 54b of the devices 51 and 52 along one direction. It has a bellows member 95 that expands and contracts.

By configuring in this way, the same effects as the power generation unit 10C of the first embodiment can be obtained. That is, the SOFC 40, the connection block 60, and the GPU 50 that are connected in the rigid state are fixed to the fixed plate 30 in the rigid state by the first fixing unit 70, and all the devices in the GPU 50 (the fuel reformer 51, the catalytic combustor). 53 and the heat exchanger 52) are fixed to the fixed plate 30 by the second fixing portion 80 in a rigid state, and the connecting block 60 is fixed to the fixing plate 30 by the second fixing portion 80 in a rigid state. For this reason, the natural frequency of the power generation unit 10C increases, and the resonance frequency increases. As a result, it is possible to suppress that the natural frequency of the power generation unit 10C deviates (rises) from the frequency range where the road surface load input is large, and the vibration caused by traveling adversely affects the operation of the power generation unit 10C. Since the natural frequency of the power generation unit 10C increases, the rigidity of the SOFC 40, the connection block 60, and the GPU 50 connected in a rigid state is improved. Displacement (elongation) accompanying thermal expansion of the devices (catalytic combustor 53 and heat exchanger 52) in the GPU 50 is absorbed in one direction by the expansion and contraction of the bellows member 95. As a result, stress due to thermal expansion can be reduced.

(Other modifications)
Specific configurations of the first fixing unit 70 and the second fixing unit 80 are not limited to the above-described configurations. The specific configuration of the first fixing unit 70 can be modified as appropriate as long as it exhibits the function of fixing the other end plate 109 side of the SOFC 40 to the fixing plate 30 in a rigid state. The specific configuration of the second fixing unit 80 can be appropriately modified as long as it exhibits a function of fixing at least one of the at least one device 51, 52, 53 and the connection block 60 in the GPU 50 to the fixing plate 30 in a rigid state. Both different types of fastening methods such as bolt fastening and welded joints can be applied. The number of fixed points is also arbitrary.

Although the embodiment in which the displacement absorbing portion 90 has the slider 91 or the bellows member 95 has been described, the specific configuration of the displacement absorbing portion 90 is not limited to this case. The specific configuration of the displacement absorbing unit 90 can be appropriately modified as long as it exhibits the function of absorbing the displacement accompanying the thermal expansion of the device in the GPU 50 in one direction. For example, a damper using a spring or working fluid pressure (hydraulic pressure or pneumatic pressure) can be used.

10, 10A, 10B, 10C Power generation unit,
20 Side members,
30 fixed plate,
31 heat insulation,
40 Solid oxide fuel cell (SOFC),
40S fuel cell stack,
41a, 41b, 41c manifold,
50 Gas processing unit (GPU),
51, 52, 53 equipment,
51 Fuel reformer,
51a supply pipe,
52 heat exchanger,
52a supply pipe,
52b exhaust pipe,
52c introduction pipe,
53 Catalytic combustor (combustor),
54a, 54b, 54c manifold,
55 flange member,
55a convex part,
56a, 56b device main body,
60 connecting blocks,
60a convex part,
61 1st passage part (passage part),
62 second passage part (passage part),
63 3rd passage part (passage part),
70 first fixing part,
71 first bracket,
72 second bracket,
72a outer periphery,
73 welding,
80 second fixing part,
81 first plate,
82 second plate,
83 struts,
84 flange part,
90 displacement absorber,
91 slider,
92 support legs,
93 Guide shaft,
94 guide bracket,
95 Bellows member,
100 cell units,
108 Lower end plate (one end plate),
109 Upper end plate (the other end plate),
110 Metal support cell assembly,
110M metal support cell,
111 electrolyte electrode assembly,
111A anode layer,
111C cathode layer,
111E electrolyte layer,
112 Metal support part,
113 cell frames,
AG anode gas,
AOG anode off gas,
CG oxidant gas, cathode gas,
EG Exhaust gas.

Claims (9)

A power generation unit held on a fixed plate connected to the vehicle body,
A solid oxide fuel cell;
A fuel reformer that reforms fuel supplied to the solid oxide fuel cell, a combustor that burns unburned gas in the anode off-gas discharged from the solid oxide fuel cell, and an exhaust gas discharged from the combustor. A gas processing unit including three devices of a heat exchanger for exchanging heat between the exhaust gas and the oxidant gas supplied to the solid oxide fuel cell;
A manifold formed integrally on one end plate side of the solid oxide fuel cell, and a connecting portion that integrally connects each manifold of the device in the gas processing unit;
A first fixing portion for fixing the other end plate side of the solid oxide fuel cell to the fixing plate in a rigid state;
A second fixing portion for fixing at least one of the device and the connecting portion in the gas processing unit to the fixing plate in a rigid state;
A power generation unit comprising: a displacement absorbing portion that absorbs in one direction a displacement associated with thermal expansion of the device in the gas processing unit. The connecting portion is a block in which a passage portion is formed to connect the manifold formed on one end plate side of the solid oxide fuel cell and each manifold of the device in the gas processing unit. Having a shape, and being welded and joined to the one end plate from the inside of the passage portion,
2. The power generation unit according to claim 1, wherein the solid oxide fuel cell is formed by stacking a cell unit on one of the end plates integrated with the connecting portion. The power generation unit according to claim 1 or 2, wherein the first fixing portion has a first bracket fixed at a plurality of points with respect to the fixing plate. The power generation unit according to any one of claims 1 to 3, wherein the first fixing portion includes a second bracket fixed at a plurality of points to the other end plate of the solid oxide fuel cell. . The power generation unit according to claim 4, wherein the second bracket is fixed to the other end plate of the solid oxide fuel cell by welding. The power generation unit according to any one of claims 1 to 5, wherein the displacement absorbing portion includes a slider for guiding a displacement along the one direction of the device in the gas processing unit. The displacement absorbing portion has a bellows member disposed between the device main body of the device and the manifold of the device in the gas processing unit and extending and contracting along the one direction. The power generation unit according to Item 1. The power generation unit according to any one of claims 1 to 7, wherein the one direction is a horizontal direction and a direction in which the solid oxide fuel cell and the gas processing unit face each other. The power generation unit according to any one of claims 1 to 8, wherein a material for forming the connecting portion, the first fixing portion, and the second fixing portion is the same as a material for forming the fixing plate.

Images