Fuel cell and fuel cell device

Abstract

Fuel cell (140) configured such that a voltage sensing cell connector (70) used to sensing a cell voltage can be attached to it, the fuel cell (140) comprising: a membrane electrode arrangement (10); a pair of separators (20, 30) that sandwich the membrane electrode arrangement (10) between them; a recessed section (60) into which the cell connector (70) can be inserted; a plate-like guide section (32) arranged on one side of the recess section (60), wherein the plate-like guide section (32) extends in an insertion direction of the cell connector (70) and serves as a guide for the cell connector (70) when the cell connector (70) is inserted into the recess section (60); a resin layer (40) arranged between the pair of separators (20, 30); and a pressure element (41) formed from a part of the resin layer (40), wherein the pressure element (41) projects into the recess section (60) at a point opposite the guide section (32), and at which the pressure element (41) can press a part of the cell connector (70) inserted into the recess section (60).

Description

BACKGROUND Technical area

[0001] The present disclosure relates to a fuel cell to which a voltage sensing cell connector, used for sensing a cell voltage, can be attached, and to a fuel cell device comprising a stack of several such fuel cells. State of the art

[0002] A fuel cell device is typically configured as a stacked structure consisting of multiple fuel cells, referred to as unit cells. A fuel cell that is a unit cell has a membrane electrode assembly (MEA) comprising an electrolyte membrane and an anode and cathode located on opposite sides of the electrolyte membrane, and is formed in a substantially rectangular shape in a top view. The fuel cell also includes a pair of separators that sandwich the anode and cathode between them.

[0003] The separator includes at least one fuel gas distributor for supplying fuel gas, such as hydrogen gas, to the anode and an oxidation gas distributor for supplying oxidation gas, such as oxygen gas, to the cathode.

[0004] The separator functions as a cell electrode, and a cell connector with a terminal is attached to a portion of the separator (a portion extending outward from the power generation area) to detect a voltage from the fuel cell. JP 2007-200633 A or JP 2007-220338 A describe an example of a mounting structure for attaching such a cell connector to a fuel cell.

[0005] In the fastening structure described in JP 2007-200633 A, a fitting or counterpart formed on a cell connector is connected to a fitting or counterpart located on the fuel cell side, so that the cell connector can be attached to the fuel cell side. In the fastening structure described in JP 2007-220338 A, a protruding section is formed on one of two separators that make up the fuel cell. This protruding section curves in the thickness direction of the fuel cell, and a cell connector is firmly inserted between adjacent separators and the protruding section. That is, the cell connector is sandwiched together and firmly held in the thickness direction of the fuel cell. SUMMARY

[0006] In the conventional fastening structure for attaching a cell connector to a fuel cell, the thickness of the fuel cell is inevitably increased. This is because, in the fastening structure described in JP 2007-200633 A, since the counterpart formed on the cell connector is connected to the counterpart on the fuel cell side, the thickness of a resin frame forming the counterpart must be increased to prevent deformation of the counterpart. In the fastening structure described in JP 2007-220338 A, since a cell connector to be inserted between adjacent separators is fixed using a bulging section formed on one of the separators, the thickness of the fuel cell is inevitably increased by an amount equal to the width of the bulging section.

[0007] The present disclosure was made in consideration of the foregoing and proposes a fuel cell to which a voltage-sensing cell connector can be reliably held without increasing the thickness of the fuel cell to a thickness greater than that originally required for power generation. Furthermore, the present disclosure proposes a fuel cell device obtained by stacking several such fuel cells.

[0008] A fuel cell according to one aspect of the present disclosure is a fuel cell configured such that a voltage-sensing cell connector, used for sensing a cell voltage, can be attached to it, the fuel cell comprising: a membrane electrode assembly; a pair of separators sandwiching the membrane electrode assembly between them; a recessed section into which the cell connector can be inserted; a plate-like guide section arranged on one side of the recessed section, the plate-like guide section extending in an insertion direction of the cell connector and serving as a guide for the cell connector when the cell connector is inserted into the recessed section; a resin track or...Resin layer arranged between the pair of separators; and a pressure element formed from a part of the resin layer, wherein the pressure element projects into the recess section at a point opposite the guide section, and at which the pressure element can press a part of the cell connector inserted into the recess section.

[0009] In the fuel cell according to the present disclosure, the underside of the cell connector inserted into the recess section is supported by the guide section formed in the recess section. In this state, a portion of the cell connector is pressed through the pressure element, which forms part of the resin layer arranged between the pair of separators and projects into the recess section. This stabilizes the mounting position of the cell connector. Furthermore, each of the guide section and the pressure element is designed as a plate projecting only in the plane of the fuel cell, so that the thickness of the fuel cell does not increase due to the guide section or the pressure element.

[0010] In some embodiments of the fuel cell of the present disclosure, opposite sides of a proximal or near side of a section of the resin layer forming the pressure element are arranged sandwich-like between the pair of separators.

[0011] In some embodiments of the fuel cell of the present disclosure, the guide section and the pressure element can be designed as separate, dedicated elements for the fuel cell. However, in some embodiments, from the perspective of further simplifying the structure, the guide section is formed from a part of the separator and the pressure element from a part of an insulating resin layer arranged between the pair of separators to seal a space between the pair of separators.

[0012] In some embodiments of the fuel cell of the present disclosure, at least one fuel gas distributor and one oxidation gas distributor are arranged at a circumferential edge of the fuel cell, and the recess section is arranged near the fuel gas distributor.

[0013] The present disclosure also provides a fuel cell device comprising a stack of several such fuel cells.

[0014] According to the present disclosure, a fuel cell is proposed in which a voltage sensing cell connector can be reliably held without increasing the thickness of the fuel cell to a thickness greater than that originally required for power generation, and a fuel cell device obtained by stacking a plurality of such fuel cells. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 is a representation of a schematic structure of a fuel cell system; Fig. 2 is a top view of a fuel cell of one embodiment; Fig. Figure 3 is a schematic representation of a cross-section along line AA of Fig. 2; Fig. Figure 4 is an enlarged perspective view of the surroundings of a recessed section into which a cell connector of a fuel cell of one embodiment can be inserted; Fig. 5 is a top view of a Fig. 4 area shown; Fig. Figure 6 is a perspective view of a cell connector; Fig. Figure 7 is a top view showing a state in which a cell connector is inserted into a recess section of a fuel cell; Fig. Figure 8 is a cross-sectional view along line BB of Fig. 7; Fig. Figure 9 is a cross-sectional view along line CC of Fig. 7; and Fig. Figure 10 is a perspective view of the surroundings of a recessed section into which a cell connector can be inserted, a fuel cell device with a plurality of stacked fuel cells. DETAILED DESCRIPTION

[0015] An embodiment of the present disclosure is described below with reference to the drawings. First, a schematic structure of a fuel cell system using fuel cells of this embodiment is described.

[0016] A fuel cell system 100a comprises a fuel cell stack 100 as a stack of fuel cells. The fuel cell stack 100 is a stacked structure with an end plate 110, an insulating plate 120, a current collector 130, a plurality of fuel cells 140, a current collector 130, an insulating plate 120, and an end plate 110, stacked in that order. The fuel cell stack 100 is supplied with hydrogen as fuel gas from a hydrogen tank 150 in which high-pressure hydrogen is stored. Fuel gas (anode exhaust) not used in the fuel cell stack 100 is discharged from the fuel cell stack 100 to the outside via a discharge pipe 151. In addition, air as an oxidizer gas is supplied to the fuel cell stack 100 via an air pump 160. Oxidation gas (cathode exhaust gas) that was not used in the fuel cell stack 100 is discharged to the outside via a discharge pipe 161 from the fuel cell stack 100.

[0017] Furthermore, a cooling medium is supplied to the fuel cell stack 100 via a water pump 171. This cooling medium is cooled by a cooler 170. The cooling medium exiting the fuel cell stack 100 is conveyed to the cooler 170 via a pipe. Suitable cooling media include, for example, water, non-freezing water such as ethylene glycol, or air.

[0018] Each fuel cell comprises 140 of the fuel cell stack 100, as shown in Fig. Figure 3 shows a schematic cross-sectional view along line AA of Fig. Figure 2 shows a membrane electrode assembly (MEA) 10, which serves as a current-generating module and a pair of separators 20, 30 sandwiching the MEA between them. Diffusion layers 12, 13 are provided between the MEA and the separators 20, 30. In this example, the anode-side separator 20 comprises a plurality of threaded fuel gas flow channel grooves 14 on a plane on the side of the MEA and a plurality of threaded coolant flow channel grooves 15 on a plane on the side opposite the MEA. The cathode-side separator 30 on the other side comprises a plurality of thread-like oxidation gas flow channel grooves 16 on a plane on the side of the membrane electrode arrangement 10.

[0019] Each fuel cell 140 comprises an insulating resin sheet or resin layer 40, which is arranged outside (on the outer circumference) of the membrane electrode assembly 10. The membrane electrode assembly is sandwiched between the anode-side separator 20 and the cathode-side separator 30 along its plane. The resin layer 40 is formed into a plate and a frame using thermoplastic resin and serves to seal a space between the anode-side separator 20 and the cathode-side separator 30, while the membrane electrode assembly 10 is held in the central area. Resins such as PE, PP, PET, or PEN can be used for the resin layer 40.

[0020] Fig. Figure 2 is a schematic top view of the fuel cell 140. A region of the central section, designated by the symbol S, corresponds to the membrane electrode assembly 10 and is a power-generating region S. The aforementioned fuel gas flow channel grooves 14 and oxidation gas flow channel grooves 16 are formed around regions of the anode-side separator 20 and the cathode-side separator 30, respectively, which are opposite the power-generating region S, thereby forming irregular planes. The aforementioned insulating resin layer 40 is located on the outer circumferential side of the power-generating region S. Each of the anode-side separator 20 and the cathode-side separator 30 around a region of the resin layer 40 has a flat plane 17, and the resin layer 40 is sandwiched between the pair of separators 20, 30.

[0021] As in Fig. As shown in Figure 3, open sections 18 are provided around an outer circumferential edge of the resin layer 40 between the anode-side separator 20 and the cathode-side separator 30. These sections widen from the sections of the flat planes 17 to almost the same height as the fuel gas flow channel grooves 14 and the oxidation gas flow channel grooves 16, and gaps 19 are formed between the resin layer 40 and the widened open sections 18. Furthermore, the resin layer 40 extends slightly outwards beyond the front ends of the widened open sections 18.

[0022] In the flat plane 17, i.e., a non-power-generating region of the fuel cell 140, an inlet-side fuel gas distributor 51, a coolant outlet distributor 52, and an inlet-side oxidation gas distributor 53 are formed at one end of the fuel cell 140. Meanwhile, at the other end, an outlet-side fuel gas distributor 54, a coolant inlet distributor 55, and an outlet-side oxidation gas distributor 56 are formed.

[0023] The fuel gas supplied via a pipe is directed via the inlet-side fuel gas distributor 51 onto the fuel gas flow channel grooves 14 ( Fig. 3) distributed to each fuel cell 140. Afterwards, fuel gas not used in the fuel gas flow channel slots 14 is collected by the outlet-side fuel gas distributor 54 and discharged from the fuel cell stack 100 to the outside. Meanwhile, the oxidation gas supplied via a pipe is distributed via the inlet-side oxidation gas distributor 53 to the oxidation gas flow channel slots 16 ( Fig. 3) distributed to each fuel cell 140. Subsequently, the oxidation gas that was not used in the oxidation gas flow channel grooves 16 is collected by the outlet-side oxidation gas distributor 56 and discharged to the outside via a pipe from the fuel cell stack 100.

[0024] A cooling medium supplied via a coolant line is directed via the coolant inlet distributor 55 onto the coolant flow channel grooves 15 ( Fig. 3) distributed to each fuel cell 140. The cooling medium is then collected from the coolant outlet distributor 52 and discharged to the outside via a pipe from the fuel cell stack 100.

[0025] It is normally customary to use hydrogen gas as the fuel gas and air as the oxidizer to operate a fuel cell device. Therefore, the volume of air supplied to the fuel cell during operation is greater than the volume of hydrogen gas. Consequently, the openings of the fuel gas distributors 51 and 54 can be set smaller than those of the oxidizer distributors 53 and 56. Therefore, larger spaces can be secured around the fuel gas distributors 51 and 54 than around the oxidizer distributors 53 and 56.

[0026] In the fuel cell 140 of this embodiment, a recess section 60 is formed in a portion of the large space surrounding the outlet-side fuel gas distributor 54, and a voltage-sensing cell connector 70 is inserted into the recess section 60 for sensing a cell voltage. Its structure is described in detail below.

[0027] Fig. Figure 4 is an enlarged perspective view of the area around the recess section 60 of the fuel cell 140, into which the cell connector 70 can be inserted, and Fig. Figure 5 is a top view of it. Fig. Figure 6 is a perspective view of the cell connector 70, which can be inserted into the recess section 60.

[0028] As in Fig. 4 and Fig. As shown in Figure 5, the recess section 60 in this embodiment is an area surrounded by a first side section 142, which is inclined obliquely downwards at an angle of approximately 45 degrees from one side (hereinafter referred to as the top for convenience) 141 of the fuel cell 140, a second side section 143, which rises obliquely upwards from the lower end of the first side section 142 to the top 141, and a third side section 144, which extends from the upper end of the second side section 143 to the top 141.

[0029] As in Fig. As shown in Figure 4, the separator 20 is partially cut out on one side along the first side section 142, the second side section 143, and the third side section 144 of the recess section 60, and the extended open section 18 is formed along the recess section. Furthermore, as shown in Fig. Figure 8 clearly illustrates a cross-sectional view along line BB from Fig. Figure 7 illustrates the state in which the cell connector 70 is inserted into the recess section 60, and in Fig. 9, which shows a cross-sectional view along line CC of Fig. Figure 7 shows the resin layer 40 partially extending outwards along the recess section. It should be noted that in Fig. Figure 7 shows the cell connector 70 in a cross-section and a conductive wire 84 for connection to terminal 81 is shown.

[0030] The extended open section 18 of the separator 30 on the other side comprises a first extension section 31, which extends to a region surrounded by the lower section of the first side section 142, the second side section 143, and the third side section 144 of the recess section 60; and a second extension section 32, which extends from the lower region of the first extension section 31 along the first side section 142. The upper edge 32a of the second extension section 32 is parallel to the first side section 142. A protruding section 33, which acts as a stop, is formed on a section of the first extension section 31.

[0031] A portion of the resin layer 40, enclosed between the flat planes 17, 17 of the separators 20, 30, comprises a projection 41 that extends strongly from the front end of the third side section 144 of the recess section 60 towards the side of the first side section 142, and the underside of the projection 41 convexly faces the side of the first side section 142. The separator 20, the resin layer 40, its projection 41, and the separator 30 are arranged in this order from the front surface to the rear surface in the Fig. 4 and Fig. Stacked 5.

[0032] Next, the cell connector 70, which is suitable for insertion into the recess section 60, is described. Fig. Figure 6 is a perspective view of an example of the cell connector 70. The cell connector 70 comprises a flat housing 71. The housing 71 includes a body section 73 with a shape corresponding to the shape of the recess section 60 formed in the fuel cell 140, and a handle part 74 located at one end of the body section 73.

[0033] The body section 73 comprises a linear base section 75 and a front end section 76, which is the front end face of the base section 75. The front end 77 of the front end section 76 has an acute angle. The upper edge face of the front end section 76 comprises an inclined front plane 78, which is inclined obliquely upwards with respect to the linear base section 75, a crimp or clamping section 79 extending from the upper end of the inclined front plane 78 towards the linear base section 75, and an inclined rear plane 80 extending obliquely upwards from the rear end of the clamping section 79. The inclined rear plane 80 is continuous with the handle part 74. The length of the linear base section 75 is slightly shorter than that of the first side section 142 of the recess section 60.

[0034] A space is formed in the housing 71 in which a clamp 81 is arranged. A gap 82, which can accommodate the second extension section 32 of the separator 30, is formed at the lower end of the base region 75 along its entire length, and a gap 83, which can accommodate the first extension section 31 of the separator 30, is also formed in the front end region 76. The distance α from the upper edge 32a of the second extension section 32 of the separator 30 to the lower end of the projection 41 of the resin layer 40 is set approximately 0.1 to 0.5 mm shorter than the distance β between the upper edge of the gap 82 and the clamping section 79 of the cell connector 70.

[0035] The terminal 81 is arranged on a section where part of the first extension section 31 of the separator 30 can be arranged in a sandwich-like state, in which the cell connector 70 is inserted into the recess section 60, which is the cut-out section of the separator 30, and a conductive wire 84 (see Fig. 7) is connected to the rear end of terminal 81.

[0036] To attach the cell connector 70 to the fuel cell 140, the cell connector 70 is positioned so that it is inserted into the recessed section 60 as the cut-out section. For attachment, the second extension section 32 of the separator 30 is inserted into the gap 82 formed in the base region 75 of the cell connector 70. In this position, the cell connector 70 is pushed downwards so that it is pressed into the recessed section 60, with the second extension section 32 acting as a guide. Due to the oblique downward movement of the cell connector 70, the front end 77 of the front end region 76 of the cell connector 70 reaches a region of the first extension section 31 of the separator 30. As the cell connector 70 is pushed further, the first extension section 31 is received in the front end region 76, and in this position, the connection is established.The terminal 81 in the cell connector 70 is electrically connected to the first extension section 31 of the separator 30.

[0037] As described above, the distance α from the upper edge 32a of the second extension section 32 of the separator 30 to the lower end of the projection 41 of the resin layer 40 is set approximately 0.1 to 0.5 mm shorter than the distance β between the upper edge of the gap 82 and the clamping section 79 of the cell connector 70. Therefore, when the cell connector 70 is inserted into the recess section 60 formed in the fuel cell 140, the clamping section 79 of the cell connector 70 is pressed downwards, i.e., towards the second extension section 32 of the separator 30, due to the elastic force of the projection 41 of the resin layer 40. This pressure secures the cell connector 70 in a stable position on the fuel cell 140.

[0038] Furthermore, the proximal or near side of the projection 41 of the resin layer 40 is sandwiched on its right and left sides by the flat planes 17, 17 of the separators 20, 30, so that the position of the projection 41 can also be kept stable.

[0039] As described above, in the fuel cell 140 of this embodiment, a portion of the insulating resin layer 40, which is typically arranged on the outer surface (outer circumference) of the membrane electrode assembly (MEA) 10 serving as the power-generating module along its plane direction, is formed to project in the plane direction, and the lower end face of the projection 41 serves as a pressure element for pressing the cell connector 70 to be attached to the fuel cell 140, thus ensuring the stability of the cell connector 70. Therefore, in this embodiment, an insulating resin layer typically used for fuel cells can be used as is to ensure the stability of the cell connector without requiring a thick resin layer as in conventional methods for attaching a cell connector.Thus, the stability of the cell connector can be ensured without increasing the physical size of the fuel cell 140.

[0040] Furthermore, in this embodiment, as in Fig. As shown in Figure 2, since the aforementioned recess section 60, into which the cell connector can be inserted, is formed using a void near the outlet-side fuel gas distributor 54, no new space is required for providing the recess section 60, thus saving space in the fuel cell 140. It should be noted that, although the recess section 60 in Fig. 2 is formed near the outlet-side fuel gas distributor 54 when an area of ​​the opening of the inlet-side fuel gas distributor 51 is reduced, a space can also be ensured near the inlet-side fuel gas distributor 51, and thus the recess section 60, into which the cell connector can be inserted, can be formed around the inlet-side fuel gas distributor 51.

[0041] Furthermore, in this embodiment, the angle of the front end 77 along the insertion direction of the cell connector 70 into the recess section 60 is acute, so that the degree of disturbance between the front end region 76 of the cell connector 70 and the front end of the first extension section 31 of the separator 30 can be reduced during insertion, and thus the cell connector 70 can be inserted into the recess section 60 without difficulty.

[0042] Although in this embodiment the second extension section 32 of the separator 30 is used as a guide section for attaching the cell connector 70 to the fuel cell 140, it is also possible to form an element corresponding to the second extension section 32 using an element other than the separator 30, provided that the overall thickness is not increased. Although an element that presses the cell connector 70 from above is formed from a portion of the insulating resin layer 40 for sealing a space between the pair of separators 20, 30, it is also possible to arrange a different resin layer, distinct from the insulating resin layer 40, between the pair of separators 20, 30, provided that the overall thickness is not increased.

[0043] The above with reference to the Fig. The embodiment described in Figures 2 to 9 shows a single fuel cell 140 and a single cell connector 70. In a structure of the fuel cell stack 100, which comprises a plurality of fuel cells 140, as shown in Figures 2 to 9, the fuel cell stack 100 comprises a plurality of fuel cells 140. Fig. The fuel cell system 100a shown in Figure 1, however, will be, as in Fig. Figure 10 shows recess sections 60a of the same shape formed at the same positions of the fuel cells forming a fuel cell group 140a, and a cell connector 70a is inserted into the recess sections 60a, in which the same number of cell connectors 70 as the recess sections 60a are arranged in parallel.

[0044] Finally, the results of a comparison between the actual example of fuel cell 140 according to this embodiment and a fuel cell with a connector attached to it in a conventional manner, as described in JP 2007-200633 A, are described. For the fuel cell 140 according to this embodiment, the resin layer 40 with a thickness of 0.2 mm was used, which ensured the stability of the cell connector 70 attached to the fuel cell 140. The thickness of the fuel cell 140 was 1.0 mm. In contrast, to attach a cell connector to a fuel cell as described in the prior art method, a resin frame with a thickness of 1.0 mm would be required to form the aforementioned counterpart, so that the thickness of the fuel cell itself, even when using the same membrane electrode assembly (MEA) as the fuel cell 140 according to this embodiment, would be 1.8 mm.Accordingly, it was found that with the means for fastening the cell connector 70 according to this embodiment, a fuel cell with the same power generation rate as the conventional fuel cell can be obtained without increasing the thickness of the fuel cell to a thickness greater than that originally required for power generation. REFERENCE MARK LIST 100a Fuel cell system 100 fuel cell stacks 140 fuel cell 141 Top of the fuel cell 142 First side section forming the recess section 143 Second side section, which forms the recess section 144 Third page section, which forms the recess section 10 Membrane Electrode Assembly (MEA) 17 Flat plane of the separator 18 Extended open section around the separator 19 Gap of the extended open section between resin layer and separator 20, 30 pairs of separators 40 Insulating resin layer 51 Inlet-side fuel gas distributor 52 Coolant outlet distributor 53 Inlet-side oxidation gas distributor 54 Exhaust-side fuel gas distributor 55 Coolant inlet distributor 56 Outlet-side oxidation gas distributor 60 recessed section into which the cell connector can be inserted. 70 voltage sensing cell connectors 81 terminal 84 Conductive wire for connection to the terminal 31 First extension section of the separator 30 32 Second extension section of the separator 30 41 Protrusion that extends into the recess section 60 of the resin layer. 71 Flat case 73 Body section of the casing 74 Handle part of the housing 75 Linear Basis Area 76 Front end area 77 Front end of the front end area 79 Crimp or clamping section 82 Gap at the bottom of the base area 83 Gap in the front end area α Distance from the top edge of the second extension section of the separator to the resin layer protrusion β Distance between the top edge of the gap 82 and the clamping section 79 of the cell connector S Power generation area

Claims

[1] Fuel cell (140) designed such that a voltage sensing cell connector (70) used to sensing a cell voltage can be attached to it, the fuel cell (140) comprising: a membrane electrode arrangement (10); a pair of separators (20, 30) that sandwich the membrane electrode arrangement (10) between them; a recessed section (60) into which the cell connector (70) can be inserted; a plate-like guide section (32) arranged on one side of the recess section (60), wherein the plate-like guide section (32) extends in an insertion direction of the cell connector (70) and serves as a guide for the cell connector (70) when the cell connector (70) is inserted into the recess section (60); a resin layer (40) arranged between the pair of separators (20, 30); and a pressure element (41) formed from a part of the resin layer (40), wherein the pressure element (41) projects into the recess section (60) at a point opposite the guide section (32), and at which the pressure element (41) can press a part of the cell connector (70) inserted into the recess section (60). [2] Fuel cell (140) according to claim 1, wherein opposite sides of a near side of a section of the resin layer (40) forming the pressure element (41) are sandwiched between the pair of separators (20, 30). [3] Fuel cell (140) according to claim 1, wherein the pressure element (41) is formed from a part of an insulating resin layer (40) arranged between the pair of separators (20, 30) to seal a space between the pair of separators (20, 30). [4] Fuel cell (140) according to claim 1, wherein the guide section (32) is formed from a part of the separator (20, 30). [5] Fuel cell (140) according to claim 1, wherein at least one fuel gas distributor (51, 54) and one oxidation gas distributor (53, 56) are arranged on a circumferential edge of the fuel cell (140), and the recess section (60) is located near the fuel gas distributor (51, 54). [6] Fuel cell device (100a) comprising a stack of several fuel cells (140) according to any one of claims 1 to 5.

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