JP6261646B2 - Fuel cell stack - Google Patents

Description

  The present invention relates to a fuel cell stack.

  The fuel cell stack includes a manifold and a plurality of fuel cells. The manifold has an internal space. The manifold has a top plate in which a plurality of through holes are formed. A through hole formed in the top plate communicates the internal space of the manifold with the outside. Each fuel cell is inserted into the through hole. Each fuel cell is joined to the top plate of the manifold by a joining material in a state of being inserted into each insertion hole.

JP2015-144114A

  The subject of this invention is ensuring the insulation of a manifold and a fuel cell in a fuel cell stack.

  A fuel cell stack according to an aspect of the present invention includes a manifold, an insulating member, and a fuel cell. The manifold has an internal space and a through hole. The through hole communicates the internal space with the outside. The insulating member is disposed in the through hole. The insulating member is fixed to the manifold. The fuel battery cell has a gas flow path. This gas flow path communicates with the internal space through the through hole. Both ends of the fuel cell in the width direction are placed on an insulating member.

  In the conventional fuel cell stack, the fuel cell is supported by the bonding material. For this reason, there exists a possibility that a crack may generate | occur | produce in a joining material with the weight of a fuel cell. In order to prevent the bonding material from cracking, for example, a configuration in which the fuel cell is supported from below by a manifold is conceivable. However, with this configuration, there is a possibility that sufficient insulation between the manifold and the fuel battery cell cannot be secured. On the other hand, in the fuel cell stack according to the present invention, the fuel cell is supported on the insulating member. Since the insulating member is interposed between the fuel cell and the manifold, it is possible to suppress a leak current from flowing from the fuel cell to the manifold. For this reason, the insulation of a fuel cell and a manifold is securable.

  Preferably, the insulating member has a pair of base portions that are arranged with a gap in the width direction.

  Preferably, the insulating member has a connecting portion that extends in the width direction of the fuel cell and connects the pair of base portions. According to this structure, the handleability of an insulating member can be improved.

  Preferably, the insulating member has a support wall portion. This support wall part is arrange | positioned on the base part and is comprised so that the proximal end part of a fuel cell may be enclosed. According to this configuration, since the proximal end portion of the fuel cell is surrounded by the support wall portion, it is possible to more reliably prevent the fuel cell and the manifold from coming into contact with each other.

  The fuel cell stack may further include a first bonding material and a second bonding material. The first bonding material bonds the base portion of the insulating member and the manifold. The second bonding material bonds the support wall portion of the insulating member and the fuel battery cell. According to this configuration, since the bonding material for fixing the fuel cell to the manifold is divided into the first bonding material and the second bonding material, a leakage current flows from the fuel cell to the manifold via the bonding material. It can prevent more reliably flowing.

  The fuel cell stack may further include a first bonding material that bonds the fuel cell and the manifold.

  Preferably, the insulating member is made of an insulating ceramic.

  Preferably, the proximal end portion of the fuel cell is located on the distal side of the through hole. That is, the proximal end portion of the fuel battery cell is not inserted into the through hole. When inserting a fuel cell into the through hole, from the viewpoint of gas sealing properties, it is usually possible to reduce the gap between the inner wall surface of the through hole and the side surface of the fuel battery cell and to fill the gap with a bonding material. preferable. However, when configured in this way, there is a possibility that a leak current flows from the fuel cell to the manifold via the bonding material. On the other hand, by positioning the proximal end portion of the fuel cell more distally than the through hole, it is possible to more reliably prevent leakage current from flowing from the fuel cell to the manifold via the bonding material. Can do.

  Preferably, the fuel battery cell includes a power generation element portion and an electrolyte. The electrolyte is electrically connected to the power generation element portion and can be configured to extend to the proximal end portion of the fuel cell. In this case, the electrolyte is preferably located on the distal side of the through hole. The proximal end portion of the fuel cell may be covered with a dense membrane other than the electrolyte.

  Preferably, the manifold has a support portion that protrudes inward from the inner wall surface of the through hole. Then, the insulating member is placed on the support portion.

  According to the present invention, it is possible to suppress the occurrence of cracks in the bonding material.

The perspective view of a fuel cell stack. Sectional drawing of a fuel cell stack. The top view of a top plate. IV-IV sectional view taken on the line of FIG. The top view of an insulating member. The perspective view of a fuel cell. The top view which shows the arrangement | positioning relationship between an insulating member and a fuel cell. The expanded sectional view of a fuel cell. Sectional drawing which shows the proximal end part of a fuel cell. The top view which shows the top plate which concerns on a modification. The top view which shows the insulating member which concerns on a modification. The top view which shows the arrangement | positioning relationship between the insulating member and fuel cell which concern on a modification. Sectional drawing of the fuel cell stack which concerns on a modification. The top view of the insulating member which concerns on a modification. Sectional drawing of the fuel cell stack which concerns on a modification.

  Hereinafter, an embodiment of a fuel cell stack according to the present invention will be described with reference to the drawings. In the following description, the width direction means the width direction (y-axis direction) of the fuel cell unless otherwise specified. Further, the proximal means a position close to the manifold, and the distal means a position opposite to the proximal, that is, a position far from the manifold.

[Fuel cell stack]
As shown in FIGS. 1 and 2, the fuel cell stack 100 includes a manifold 2, a plurality of fuel cells 1, a plurality of insulating members 3, and a bonding material 4.

[Manifold]
The manifold 2 is configured to distribute gas to each fuel cell 1. The manifold 2 is hollow and has an internal space. A gas such as fuel gas is supplied to the internal space of the manifold 2 through the introduction pipe 201. The manifold 2 has a plurality of through holes 26 (see FIG. 3) that communicate the internal space with the outside.

  The manifold 2 supports each fuel cell 1. The manifold 2 includes a manifold body 21 and a top plate 22. The manifold body 21 and the top plate 22 are joined to each other. The manifold body 21 and the top plate 22 may be integrally formed.

  The manifold body 21 has a rectangular parallelepiped shape and has an internal space whose upper surface is open. Specifically, the manifold main body 21 has a bottom wall 23, a side wall 24, and a flange portion 25. The bottom wall 23 has a rectangular shape in plan view (viewed in the x-axis direction). The side wall 24 extends upward from the peripheral edge of the bottom wall 23. The flange portion 25 is a portion extending outward from the upper end portion of the side wall 24.

  The manifold body 21 is composed of one member. That is, the bottom wall 23, the side wall 24, and the flange part 25 are comprised by one member. For example, the manifold body 21 is formed of a metal having heat resistance. More specifically, the manifold body 21 is formed of at least one selected from the group consisting of ferritic stainless steel, austenitic stainless steel, and Ni-based alloy.

  The top plate 22 is disposed on the manifold body 21 so as to close the upper surface of the manifold body 21. Specifically, the top plate 22 is disposed on the flange portion 25. In order to seal the internal space of the manifold 2, the top plate 22 is joined to the manifold body 21 over the entire circumference. The top plate 22 is joined to the manifold body 21 by welding, for example.

  As shown in FIG. 3, the top plate 22 has a plurality of through holes 26. Each through hole 26 extends in the width direction (y-axis direction) of the manifold 2. In addition, the through holes 26 are arranged at intervals in the longitudinal direction (z-axis direction) of the manifold 2.

  An insulating member 3 to be described later is disposed in each through hole 26. Specifically, as shown in FIGS. 3 and 4, the top plate 22 has a plurality of support portions 27 protruding inward from the inner wall surface of the through hole 26. A pair of support portions 27 are formed in each through hole 26. Each support portion 27 protrudes from both end portions of the through hole 26 toward each other. That is, each support portion 27 extends in the width direction (y-axis direction). The insulating member 3 is placed on each support portion 27. Since the support portion 27 protrudes inward, a step portion 28 is formed in the through hole 26. The insulating member 3 is supported by the step portion 28.

  The top plate 22 is formed of a metal having conductivity, for example. More specifically, the top plate 22 is formed of at least one selected from the group consisting of ferritic stainless steel, austenitic stainless steel, and a Ni-based alloy. The manifold body 21 and the top plate 22 may be made of different materials.

[Insulating material]
As shown in FIG. 2, each insulating member 3 is disposed in each through hole 26 of the manifold 2. The upper surface of the insulating member 3 is preferably located at the same position as the upper surface of the top plate 22 or on the distal side of the upper surface of the top plate 22. The insulating member 3 is fixed to the manifold 2. Specifically, the insulating member 3 is fixed to the top plate 22. The insulating member 3 is made of, for example, insulating ceramics. More specifically, the insulating member 3 includes MgO (magnesium oxide), Al ₂ O ₃ (aluminum oxide), 2MgO · SiO ₂ (forsterite), MgO · SiO ₂ (steatite), MgAl ₂ O ₄ ( Magnesia alumina spinel) or crystallized glass.

  As shown in FIG. 5, the insulating member 3 has a pair of base portions 31 and a connecting portion 32. The base part 31 and the connection part 32 are comprised by one member. Each base part 31 is arrange | positioned at intervals in the width direction. As shown in FIG. 2, the distance d1 between the base portions 31 is larger than the distance d2 between the ends of the gas flow paths 121 located at both ends in the width direction of the fuel cell 1 to be described later. Is preferred. The length d3 of the insulating member 3 is preferably substantially the same as the length d4 of the through hole 26.

  The connecting part 32 connects the pair of base parts 31. The connecting portion 32 extends in the width direction (y-axis direction). Further, the connecting portion 32 extends along the inner wall surface of the through hole 26. The width d5 of the through hole 26 is larger than the width d6 of the connecting portion 32. For this reason, even when the insulating member 3 is disposed in the through hole 26, the internal space of the manifold 2 and the outside communicate with each other.

[Fuel battery cell]
As shown in FIGS. 1 and 2, each fuel cell 1 extends distally from the manifold 2. In the present embodiment, each fuel cell 1 extends upward from the manifold 2. Note that the proximal end portion 101 of the fuel battery cell 1 is located on the distal side of the through hole 26. That is, the proximal end portion 101 of the fuel cell 1 is not inserted into the through hole 26.

  The fuel cells 1 are arranged at intervals from each other along the longitudinal direction (z-axis direction) of the manifold 2. Each fuel cell 1 is electrically connected to each other via a current collecting member 302 (see FIG. 9). The current collecting member 302 is disposed between the fuel cells 1 and connects adjacent fuel cells 1. The current collecting member 302 is made of a conductive material. For example, the current collecting member 302 is formed of a sintered body of oxide ceramics or a metal.

  As shown in FIG. 6, the fuel battery cell 1 includes a plurality of power generation element portions 11 and a support substrate 12. Each power generating element portion 11 is supported on both surfaces of the support substrate 12. Each power generation element unit 11 may be supported only on one side of the support substrate 12. The respective power generation element portions 11 are arranged at intervals in the longitudinal direction of the fuel battery cell 1. That is, the fuel cell 1 according to the present embodiment is a so-called horizontal stripe type fuel cell. The power generating element portions 11 are electrically connected to each other by an electrical connection portion 17 (see FIG. 8).

  The support substrate 12 has a plurality of gas flow paths 121 extending in the longitudinal direction of the fuel cell 1 inside. The gas flow path 121 communicates with the internal space of the manifold 2 through the through hole 26 of the manifold 2.

  The longitudinal direction (x-axis direction) of the support substrate 12 is the same direction as the longitudinal direction of the fuel cell 1. Each gas channel 121 extends substantially parallel to each other. Each gas channel 121 is open at both ends in the longitudinal direction of the fuel cell 1. Each gas flow path 121 is not formed at both ends 122 in the width direction (y-axis direction) of the fuel cell 1. As shown in FIG. 7, both end portions 122 in the width direction of the fuel cell 1 in which the gas flow path 121 is not formed are placed on the insulating member 3. Specifically, both end portions 122 of the fuel cell 1 in the width direction are placed on the base portion 31 of the insulating member 3. For this reason, the gas flow path 121 is not blocked by the base portion 31 of the insulating member 3. Further, each gas flow path 121 is configured not to be blocked by the connecting portion 32 of the insulating member 3.

  As shown in FIG. 8, the support substrate 12 has a plurality of first recesses 123. Each first recess 123 is formed on both surfaces of the support substrate 12. The first recesses 123 are arranged at intervals in the longitudinal direction of the support substrate 12.

The support substrate 12 is made of a porous material that does not have electronic conductivity. The support substrate 12 can be made of, for example, CSZ (calcia stabilized zirconia). Alternatively, the support substrate 12 may be composed of NiO (nickel oxide) and YSZ (8YSZ) (yttria stabilized zirconia), or composed of NiO (nickel oxide) and Y ₂ O ₃ (yttria). Alternatively, MgO (magnesium oxide) and MgAl ₂ O ₄ (magnesia alumina spinel) may be used. The porosity of the support substrate 12 is, for example, about 20 to 60%.

  Each power generation element unit 11 includes a fuel electrode 13, an electrolyte 14, and an air electrode 15. Each power generation element unit 11 further includes a reaction preventing film 16. The fuel electrode 13 is a fired body made of a porous material having electron conductivity. The fuel electrode 13 includes a fuel electrode current collector 131 and a fuel electrode active part 132.

  The fuel electrode current collector 131 is disposed in the first recess 123. Specifically, the fuel electrode current collector 131 is filled in the first recess 123 and has the same outer shape as the first recess 123. Each fuel electrode current collector 131 has a second recess 131a and a third recess 131b. The anode active part 132 is disposed in the second recess 131a. Specifically, the fuel electrode active part 132 is filled in the second recess 131a.

The fuel electrode current collector 131 can be composed of, for example, NiO (nickel oxide) and YSZ (8YSZ) (yttria stabilized zirconia). Alternatively, the fuel electrode current collector 131 may be composed of NiO (nickel oxide) and Y ₂ O ₃ (yttria), or composed of NiO (nickel oxide) and CSZ (calcia stabilized zirconia). Also good. The thickness of the fuel electrode current collector 131 and the depth of the first recess 123 are about 50 to 500 μm.

  The fuel electrode active part 132 can be composed of, for example, NiO (nickel oxide) and YSZ (8YSZ) (yttria stabilized zirconia). Alternatively, the fuel electrode active part 132 may be composed of NiO (nickel oxide) and GDC (gadolinium-doped ceria). The thickness of the fuel electrode active part 132 is 5 to 30 μm.

  The electrolyte 14 is disposed so as to cover the fuel electrode 13. Specifically, the electrolyte 14 extends in the longitudinal direction from one interconnector 171 to another interconnector 171. That is, the electrolyte 14 and the interconnector 171 are alternately arranged in the longitudinal direction of the fuel cell 1.

  The electrolyte 14 is a fired body made of a dense material that has ionic conductivity and no electronic conductivity. The electrolyte 14 can be composed of, for example, YSZ (8YSZ) (yttria stabilized zirconia). Or the electrolyte 14 may be comprised from LSGM (lanthanum gallate). The thickness of the electrolyte 14 is, for example, about 3 to 50 μm.

The reaction preventing film 16 is a fired body made of a dense material, has substantially the same shape as the fuel electrode active part 132 in a plan view (viewed in the z-axis direction), and is disposed at substantially the same position as the fuel electrode active part 132. Has been. The reaction preventing film 16 suppresses occurrence of a phenomenon in which a reaction layer having a large electric resistance is formed at the interface between the electrolyte 14 and the air electrode 15 due to a reaction between YSZ in the electrolyte 14 and Sr in the air electrode 15. Is provided. The reaction preventing film 16 can be made of, for example, GDC = (Ce, Gd) O ₂ (gadolinium-doped ceria). The thickness of the reaction preventing film 16 is, for example, about 3 to 50 μm.

The air electrode 15 is disposed on the reaction preventing film 16. The air electrode 15 is a fired body made of a porous material having electron conductivity. The air electrode 15 can be made of, for example, LSCF = (La, Sr) (Co, Fe) O ₃ (lanthanum strontium cobalt ferrite). Alternatively, the air electrode 15 has LSF = (La, Sr) FeO ₃ (lanthanum strontium ferrite), LNF = La (Ni, Fe) O ₃ (lanthanum nickel ferrite), or LSC = (La, Sr) CoO ₃ ( Lanthanum strontium cobaltite) or the like. The air electrode 15 may be composed of two layers of a first layer (inner layer) made of LSCF and a second layer (outer layer) made of LSC. The thickness of the air electrode 15 is, for example, 10 to 100 μm.

The electrical connection portion 17 is configured to electrically connect adjacent power generation element portions 11. The electrical connection portion 17 includes an interconnector 171 and an air electrode current collector film 172. The interconnector 171 is disposed in the third recess 131b. Specifically, the interconnector 171 is embedded (filled) in the third recess 131b. The interconnector 171 is a fired body made of a dense material having electronic conductivity. The interconnector 171 can be composed of, for example, LaCrO ₃ (lanthanum chromite). Alternatively, the interconnector 171 may be made of (Sr, La) TiO ₃ (strontium titanate). The thickness of the interconnector 171 is, for example, 10 to 100 μm.

  The air electrode current collector film 172 is disposed so as to extend between the interconnector 171 and the air electrode 15 of the adjacent power generation element portions 11. For example, the air electrode current collector is configured to electrically connect the air electrode 15 of the power generation element unit 11 disposed on the left side of FIG. 8 and the interconnector 171 of the power generation element unit 11 disposed on the right side of FIG. A membrane 172 is disposed. The air electrode current collector film 172 is a fired body made of a porous material having electron conductivity.

The air electrode current collector film 172 can be made of, for example, LSCF = (La, Sr) (Co, Fe) O ₃ (lanthanum strontium cobalt ferrite). Alternatively, the air electrode current collector film 172 may be made of LSC = (La, Sr) CoO ₃ (lanthanum strontium cobaltite). Or the air electrode current collection film | membrane 172 may be comprised from Ag (silver) and Ag-Pd (silver palladium alloy). The thickness of the air electrode current collector film 172 is, for example, about 50 to 500 μm.

  As shown in FIG. 9, the proximal end portion 101 of the fuel cell 1 is covered with a dense membrane 18. Specifically, the dense film 18 covers the support substrate 12. The dense film 18 is electrically connected to the power generation element unit 11. Specifically, the dense film 18 is electrically connected to the electrical connection portion 17. The dense film 18 extends toward the proximal side from between the air electrode current collector film 172 and the support substrate 12.

  The dense membrane 18 exhibits a gas seal function that prevents mixing of the fuel gas flowing in the space inside the dense membrane 18 and the air flowing in the space outside the dense membrane 18. In order to exhibit this gas sealing function, the porosity of the dense film 18 is, for example, 10% or less. The dense film 18 is made of insulating ceramics.

  Specifically, the dense film 18 can be constituted by the electrolyte 14 and the reaction preventing film 16 described above. The electrolyte 14 covers the support substrate 12 and extends from the interconnector 171 to the vicinity of the proximal end of the support substrate 12. The reaction preventing film 16 covers the electrolyte 14. The electrolyte 14 is longer than the reaction preventing film 16 in the length direction (x-axis direction) of the fuel cell 1. For this reason, both ends of the electrolyte 14 are not covered with the reaction preventing film 16.

[Bonding material]
The bonding material 4 fixes the fuel battery cell 1 to the manifold 2. Specifically, the bonding material 4 joins the fuel cell 1 disposed on the insulating member 3 to the manifold 2. The joining material 4 joins the proximal end portion 101 of the fuel cell 1 and the top plate 22 of the manifold 2. Further, the bonding material 4 is in contact with the electrolyte 14. In the state where the fuel cell 1 is fixed to the manifold 2, the through hole 26 and the gas flow path 121 communicate with each other.

The bonding material 4 is, for example, crystallized glass. As the crystallized glass, for example, a SiO ₂ —B ₂ O ₃ system, a SiO ₂ —CaO system, or a SiO ₂ —MgO system may be employed. In this specification, crystallized glass means that the ratio (crystallinity) of “volume occupied by crystal phase” to the total volume is 60% or more, and “volume occupied by amorphous phase and impurities relative to the total volume”. "Indicates a glass having a ratio of less than 40%. As the material of the bonding material 4, amorphous glass, brazing material, ceramics, or the like may be employed. Specifically, the bonding material 4 is at least one selected from the group consisting of SiO ₂ —MgO—B ₂ O ₅ —Al ₂ O ₃ and SiO ₂ —MgO—Al ₂ O ₃ —ZnO.

[Power generation method]
The fuel cell stack 100 configured as described above generates power as follows. By flowing a fuel gas (hydrogen gas or the like) through the manifold 2 into the gas flow path 121 of each fuel battery cell 1 and exposing both surfaces of the support substrate 12 to a gas (air or the like) containing oxygen, An electromotive force is generated by a difference in oxygen partial pressure generated between the two side surfaces. When this fuel cell stack 100 is connected to an external load, an electrochemical reaction shown in the following formula (1) occurs in the air electrode 15, an electrochemical reaction shown in the following formula (2) occurs in the fuel electrode 13, and a current flows. .
(1/2) · O ₂ + 2e ⁻ → O ₂ ⁻ (1)
H ₂ + O ₂ ⁻ → H ₂ O + 2e ⁻ (2)

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning of this invention.

Modification 1
In the above embodiment, the top plate 22 has a plurality of through holes 26, but the top plate 22 may have one through hole 26 as shown in FIG. 10. In this case, the support portion 27 protrudes inward from the inner wall surface of the through hole 26 and extends in the longitudinal direction (z-axis direction) of the top plate 22. In this case, as shown in FIG. 11, it is preferable that each base portion 31 of the insulating member 3 extends in the longitudinal direction of the top plate 22. On each base portion 31, both end portions 122 of the plurality of fuel cells 1 are placed. Each base portion 31 is connected by two connecting portions 32. In addition, each base part 31 may be connected by the one connection part 32 similarly to the said embodiment.

Modification 2
In the above embodiment, the fuel battery cell 1 is a horizontal stripe type having a plurality of power generation element portions 11. However, the fuel battery cell 1 is a vertical stripe type having a single power generation element portion extending in the longitudinal direction. It may be.

Modification 3
As shown in FIG. 12, the insulating member 3 may not have the connecting portion 32. That is, the insulating member 3 may have a configuration including only a pair of base portions 31 that are separated from each other in the width direction.

Modification 4
As shown in FIG. 13, the insulating member 3 may further include a support wall portion 33. The support wall portion 33 is disposed on the base portion 31. The base portion 31 and the support wall portion 33 are integrally formed. The support wall portion 33 is configured to surround the proximal end portion 101 of the fuel cell 1. In addition, in the insulating member 3 which concerns on the modification 4, the connection part 32 does not need to have.

  In this case, the bonding material 4 for fixing the fuel cell 1 to the manifold 2 has a first bonding material 41 and a second bonding material 42. The first joining material 41 joins the base portion 31 of the insulating member 3 and the manifold 2. Specifically, the first joining material 41 joins the base portion 31 and the top plate 22.

  The second bonding material 42 joins the support wall 33 of the insulating member 3 and the fuel cell 1. Specifically, the proximal end portion 101 of the fuel cell 1 is inserted into a space surrounded by the support wall portion 33. Then, the outer peripheral surface of the fuel battery cell 1 inserted into this space and the support wall portion 33 are joined by the second joining material 42.

  The first bonding material 41 and the second bonding material 42 are arranged with a space therebetween. That is, the first bonding material 41 and the second bonding material 42 are not in contact with each other. For this reason, it is possible to prevent leakage current from flowing from the fuel battery cell 1 to the manifold 2 via the first and second bonding materials 41 and 42.

Modification 5
As shown in FIG. 14, a through hole 321 may be formed in the connecting portion 32 of the insulating member 3. When the fuel cell 1 is placed on the insulating member 3, the through hole 321 is formed at a position where the gas flow path 121 of the fuel cell 1 and the through hole 321 of the insulating member 3 communicate with each other. . As a result, the gas flow path 121 of the fuel cell 1 communicates with the internal space of the manifold 2 through the through hole 321 of the insulating member 3.

Modification 6
In the said embodiment, although the upper surface of the insulating member 3 was located in the same position as the upper surface of the top plate 22, or a distal side rather than the upper surface of the top plate 22, it is not limited to this in particular. For example, as shown in FIG. 15, the upper surface of the insulating member 3 may be located on the proximal side of the upper surface of the top plate 22. In this case, the proximal end portion 101 of the fuel cell 1 is inserted into the through hole 26 of the top plate 22.

DESCRIPTION OF SYMBOLS 100: Fuel cell stack 1: Fuel cell 11: Electric power generation element part 14: Electrolyte 101: Proximal end part 121: Gas flow path 122: Both end part 2: Manifold 26: Through-hole 27: Support part 3: Insulating member 31 : Base portion 32: Connection portion 33: Support wall portion 4: Bonding material 41: First bonding material 42: Second bonding material

Claims (12)

A manifold having an internal space, and a through hole communicating the internal space with the outside;
An insulating member disposed in the through hole and fixed to the manifold;
A fuel cell having a gas flow path communicating with the internal space via the through hole, and having both ends in the width direction placed on the insulating member;
With
The insulating member has a pair of base portions arranged with a gap in the width direction.
Fuel cell stack. The insulating member has a connecting portion that extends in the width direction of the fuel cell and connects the pair of base portions.
The fuel cell stack according to claim 1 . The insulating member has a support wall portion arranged on the base portion and configured to surround a proximal end portion of the fuel cell.
The fuel cell stack according to claim 1 or 2 . A first bonding material for bonding the base portion of the insulating member and the manifold;
A second bonding material for bonding the support wall portion of the insulating member and the fuel battery cell;
The fuel cell stack according to claim 3 , further comprising: A first bonding material for bonding the fuel cell and the manifold;
The fuel cell stack according to any one of claims 1 to 3 . The insulating member is made of insulating ceramics.
The fuel cell stack according to any one of claims 1 to 5 . The proximal end portion of the fuel cell is located distal to the through hole,
The fuel cell stack according to any one of claims 1 to 6 . The fuel cell includes a power generation element portion and an electrolyte that is electrically connected to the power generation element portion and extends to a proximal end portion of the fuel cell,
The electrolyte is located distal to the through hole;
The fuel cell stack according to any one of claims 1 to 7 . The manifold has a support portion protruding inward from an inner wall surface of the through hole,
The insulating member is placed on the support;
The fuel cell stack according to any one of claims 1 to 8 .   A manifold having an internal space, and a through hole communicating the internal space with the outside;
  An insulating member disposed in the through hole and fixed to the manifold;
  A fuel cell having a gas flow path communicating with the internal space via the through hole, and having both ends in the width direction placed on the insulating member;
  A first bonding material for bonding the fuel cell and the manifold;
A fuel cell stack comprising:   A manifold having an internal space, and a through hole communicating the internal space with the outside;
  An insulating member disposed in the through hole and fixed to the manifold;
  A fuel cell having a gas flow path communicating with the internal space via the through hole, and having both ends in the width direction placed on the insulating member;
With
  The fuel cell includes a power generation element portion and an electrolyte that is electrically connected to the power generation element portion and extends to a proximal end portion of the fuel cell,
  The electrolyte is located distal to the through hole;
Fuel cell stack.   A manifold having an internal space, and a through hole communicating the internal space with the outside;
  An insulating member disposed in the through hole and fixed to the manifold;
  A fuel cell having a gas flow path communicating with the internal space via the through hole, and having both ends in the width direction placed on the insulating member;
With
  The manifold has a support portion protruding inward from an inner wall surface of the through hole,
  The insulating member is placed on the support;
Fuel cell stack.

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