JP2001035515A - Cell structure of cylindrical slid electrolyte fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cell structure of a cylindrical solid electrolyte fuel cell managed with shortened manufacturing processes. SOLUTION: In this cell structure of a cylindrical solid electrolyte fuel cell, a plurality of sets consisting of a fuel electrode 2, a solid electrolyte 3, and an air electrodes 4 which compose a single cell membrane, are formed so that they are connected to each other through an interconnector 5 on the peripheral surface of a base-substance cylinder 1 along the axial direction thereof. Lead membranes 6 and 7 are formed on both axial directional end parts of the peripheral surface of the base-substance cylinder 1, with each of the lead membranes 6 and 7 being connected to the single cell membranes located at the outermost end side of the base-substance cylinder 1 in the axial direction thereof. A lead wire 14 is wound around one lead membrane 7 to lead out current via the lead wire 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cell structure of a cylindrical solid electrolyte fuel cell.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional cell structure of a cylindrical solid electrolyte fuel cell.

As shown in FIG. 5, a plurality of porous fuel electrodes 102 are formed on an outer peripheral surface of a porous cylindrical base tube 101 at predetermined intervals along an axial direction. . A porous solid electrolyte 103 is formed on each of the fuel electrodes 102. On these solid electrolytes 103,
Each of the porous air electrodes 104 is formed as a film. Dense interconnectors 105 are formed between adjacent fuel electrodes 102 and air electrodes 104, respectively.

That is, a unit cell membrane is constituted by the fuel electrode 102, the solid electrolyte 103, and the air electrode 104 which are respectively laminated on the base tube 101, and the inside and outside of the base tube 101 between the unit cell films by the interconnector 105. Is sealed and the unit cell membranes are connected in series.

[0005] On the outer peripheral surface at one end of the base tube 101, an air electrode 1 located at the most end of the base tube 101 is provided.
04 is formed with a lead film 106 connected via the interconnector 105. On the outer peripheral surface on the other end side of the base tube 101, a lead film 10 directly connected to the fuel electrode 102 located on the other end side of the base tube 101 is provided.
7 is formed.

An end current collecting film 108 connected to the lead film 106 is formed on the end surface of one end of the base tube 101 and the inner and outer peripheral surfaces. An end current collecting film 109 connected to the lead film 107 is formed on the end surface of one end of the base tube 101 and the inner and outer peripheral surfaces.

On one end side of the inside of the base tube 101, a columnar current collecting member 112 is connected to the end current collecting film 108 via a current collecting felt 110. A tube-shaped current collecting member 113 having a flange 113 a is connected to the end current collecting film 109 via a current collecting felt 111 on the other end side inside the base tube 101. A current collecting rod 112a penetrating the base tube 101 is connected to the current collecting member 112, and the current collecting rod 112a penetrates the current collecting member 113 so as not to contact the current collecting member 113.

In the cell having such a structure, the fuel electrode 102 and the lead film 10 are formed on the outer peripheral surface of the base tube 101.
7, 108, solid electrolyte 103, interconnector 105
After the film is formed and fired, one end of the base tube 101 is immersed in the raw material slurry of the end current collecting films 108 and 109, taken out and dried, and then the base tube 101 is placed in the raw material slurry.
Is immersed, taken out and dried, and the substrate tube 1
01, the air electrode 104 is formed and fired, and then the current collecting felts 110 and 111 and the current collecting member 11 are formed.
2, 113 can be obtained.

According to such a cylindrical solid electrolyte fuel cell, when a fuel gas such as hydrogen flows inside the base tube 101 at a predetermined operating temperature and air flows outside the base tube 101, Base tube 101 and fuel electrode 1
02 and the air (oxygen) transmitted through the air electrode 104 electrochemically react on the solid electrolyte membrane 103, and lead films 106, 107 and end current collecting films 108, 10
9, the current collecting member 11 via the current collecting felts 110 and 111
Electric power can be extracted from the power supply 2 and 113.

[0010]

In the conventional cell as described above, as described above, the end current collecting films 108, 1
09, the one end side of the base tube 101 is immersed in the raw material slurry,
After being taken out and dried, the other end side of the base tube 101 is immersed in the raw material slurry, taken out and dried again, and then the base tube 101 is fired.
109 was long and the work efficiency was poor.

In view of the above, an object of the present invention is to provide a cell structure of a cylindrical solid electrolyte fuel cell which can shorten the manufacturing process.

[0012]

In order to solve the above-mentioned problems, a cell structure of a cylindrical solid electrolyte fuel cell according to the present invention is connected to an outer peripheral surface of a base tube via an interconnector along an axial direction. A plurality of unit cell films are formed, and lead films respectively connected to the unit cell films located on the outermost end side in the axial direction of the base tube are formed on both ends in the axial direction of the outer peripheral surface of the base tube. A cell structure of a cylindrical solid electrolyte fuel cell, characterized in that a lead wire is wound around at least one of the lead films and power is taken out through the lead wire.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the cell structure of a cylindrical solid oxide fuel cell according to the present invention will be described with reference to FIG. FIG. 1 is a schematic structural diagram.

As shown in FIG. 1A, a plurality of porous fuel electrodes 2 are formed on an outer peripheral surface of a porous cylindrical base tube 1 at predetermined intervals along an axial direction. Have been. A porous solid electrolyte 3 is formed on each of the fuel electrodes 2. A porous air electrode 4 is formed on each of the solid electrolytes 3. A dense interconnector 5 is formed between adjacent fuel electrodes 2 and air electrodes 4.

That is, a unit cell membrane is constituted by the fuel electrode 2, the solid electrolyte 3, and the air electrode 4 which are respectively laminated on the base tube 1, and the inside and outside of the base tube 1 between the unit cell films by the interconnector 5. Is sealed and the unit cell membranes are connected in series.

On the outer peripheral surface at one end of the base tube 1, a lead film 6 connected to the air electrode 4 located at the one end of the base tube 1 via the interconnector 5 is formed. . On the outer peripheral surface on the other end side of the base tube 1, a lead film 7 that is directly connected to the fuel electrode 2 located on the other end side of the base tube 1 is formed.

An end current collecting film 8 connected to the lead film 6 is formed on the end surface of one end of the base tube 1 and the inner and outer peripheral surfaces. On one end side inside the base tube 1, a columnar current collecting member 12 is connected to the end current collecting film 8 via a current collecting felt 10. On the other end side inside the base tube 1,
A tubular current collecting member 13 having a flange 13a is fitted. A current collecting rod 12 a penetrating the base tube 1 is connected to the current collecting member 12, and the current collecting rod 12 a penetrates the current collecting member 13 so as not to contact the current collecting member 13.

On the lead film 7 at the other end of the base tube 1, a lead wire 14 (0.5 mm in diameter) made of Ni, Pt or the like is provided.
mm) is wound. The other end of the lead wire 14 is fixed to the current collecting member 13. The current collecting member 13 is connected to a current collecting member 13 of another cell via a current collecting felt 15 as shown in FIG.

In the cell having such a structure, the fuel electrode 2, the lead films 7 and 8, the solid electrolyte 3, and the interconnector 5 are formed on the outer peripheral surface of the base tube 1 and fired. One end of the base tube 1 is immersed in the raw material slurry of the electromembrane 8,
After taking out and drying and firing the base tube 1, the air electrode 4 is formed and fired, and then the current collecting felt 10 and the current collecting member 12 are assembled, while the lead film on the other end side of the base tube 1 is assembled. 7 and the current collecting member 1
3 can be obtained by assembling and connecting with the lead wire 7.

That is, the cell according to the present embodiment comprises a base tube 1
The end wire is wound around the lead wire 14 without forming an end current collecting film on the other end side, and is connected to the current collecting member 13. Therefore, it is possible to simplify the end current collecting film forming step which is more troublesome than the step of winding the lead wire 14.

Therefore, according to the cell structure of such a cylindrical solid electrolyte fuel cell, the manufacturing process can be shortened, and the manufacturing cost can be reduced.

A second embodiment of the cell structure of the cylindrical solid oxide fuel cell according to the present invention will be described with reference to FIG. FIG. 2 is a schematic structural view thereof. However, the same members as those of the first embodiment described above are denoted by the same reference numerals as those used in the description of the first embodiment, and the description thereof is omitted.

As shown in FIG. 2, a current collecting member 16 is attached to the other end of the base tube 1 by screwing two nuts 16b to a pipe 16a having a thread on the outer peripheral surface. The other end of the lead wire 14 is connected to one nut 16 b of the current collecting member 16. The current collecting felt 15 is sandwiched between the nuts 16b of the current collecting member 16.

That is, in the first embodiment described above, the current collecting member 13 specially processed is used. However, in the present embodiment, the current collecting member 16 including the commercially available pipe 16a and the nut 16b is used. We decided to use it.

Therefore, according to the present embodiment, the manufacturing process can be shortened and the manufacturing cost can be reduced, as in the case of the first embodiment described above. Since the labor and cost for manufacturing the current collecting member can be reduced, the manufacturing cost can be further reduced as compared with the case of the above-described first embodiment.

A third embodiment of the cell structure of the cylindrical solid oxide fuel cell according to the present invention will be described with reference to FIG. FIG. 3 is a schematic structural view thereof. However, for the same members as those of the first and second embodiments described above, the same reference numerals as those used in the description of the first and second embodiments are used to describe the same. Is omitted.

As shown in FIG. 3A, a current-collecting felt 17 having a hole 17a having the same diameter as the outer diameter of the base tube 1 is inserted into the other end of the base tube 1. As shown in FIG. 3B, the current collecting felt 17 has the hole 17a.
A plurality of cuts along the radial direction of the hole 17a are formed in the circumferential direction so that the fold 17b can be formed on the periphery of
As shown in FIG.
3a by inserting the other end of the base tube 1 into the base tube 7a.
As shown in (a), the fold 1 of the current collecting felt 17 is used.
The lead tube 7b can be erected so as to be in contact with the lead film 7 and the lead wire 14 at the other end of the base tube 1. The current-collecting felt 17 has its folds 17 b fastened to the base tube 1 by the lead wires 14.

That is, in the first and second embodiments described above, the lead wire 14 and the current collecting felt 15 are connected via the current collecting members 13 and 16, but in this embodiment, The lead wire 14 and the current collecting felt 17 were directly connected.

Therefore, according to the present embodiment, the manufacturing process can be shortened and the manufacturing cost can be reduced as in the first and second embodiments. In addition, since the cost for the current collecting members 13 and 16 can be eliminated,
The manufacturing cost can be further reduced as compared with the case of the second embodiment.

A fourth embodiment of the cell structure of the cylindrical solid oxide fuel cell according to the present invention will be described with reference to FIG. FIG. 4 is a schematic structural view thereof. However, for members similar to the members of the first to third embodiments described above, the same reference numerals as those used in the description of the first to third embodiments described above are used to explain the same. Is omitted.

As shown in FIG. 4, the other end of the lead wire 14 is connected to a current collector 18.

That is, in the above-described first to third embodiments, the current collecting felts 15 and 17 are used. However, in the present embodiment, the current is collected through the lead wire 14 without using the current collecting felt. The connection was made directly to the plate 18.

Therefore, according to the present embodiment, as in the first to third embodiments, the manufacturing process can be shortened, and the manufacturing cost can be reduced. About the collector felt 15, 17
Therefore, the manufacturing cost can be further reduced as compared with the above-described first to third embodiments.

In the third embodiment described above, the fold 17b of the current collecting felt 17 is tightened by the lead wire 14. However, the fold 17b may be tightened by a non-conductive wire or the like. However, the lead films 6 and 7 may shrink in volume during assembly and baking, and a gap may be formed between the lead films 6 and 7 and the fold 17b of the current collecting felt 17. Therefore, as in the case of the third embodiment described above, the lead film It is preferable to tighten the folds 17b of the current collecting felt 17 with the lead wires 14 wound around the membrane 7.

In each of the above-described embodiments, the cell structure of a cylindrical solid electrolyte fuel cell including a unit cell membrane provided with the fuel electrode 2 on the base tube 1 side and the air electrode 4 on the outside is described. Although described, even in the case of the cell structure of the cylindrical solid electrolyte fuel cell including the unit cell membrane in which the air electrode is provided on the base tube side and the fuel electrode is provided on the outside, even in the case of each of the embodiments described above. It can be applied in the same manner as described above.

[0036]

According to the cell structure of the cylindrical solid oxide fuel cell of the present invention, a plurality of unit cell membranes are formed on the outer peripheral surface of a base tube along an axial direction via an interconnector. A cell structure of a cylindrical solid electrolyte fuel cell in which lead films respectively connected to the unit cell films located on the outermost end side in the axial center direction are formed on both axial ends of the outer peripheral surface of the base tube. Since a lead wire is wound around at least one of the lead films and power is taken out through the lead wire, the process of forming the end current collecting film can be simplified, so that the manufacturing process can be shortened. And the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic structural diagram of a first embodiment of a cell structure of a cylindrical solid oxide fuel cell according to the present invention.

FIG. 2 is a schematic structural diagram of a second embodiment of a cell structure of a cylindrical solid oxide fuel cell according to the present invention.

FIG. 3 is a schematic structural view of a third embodiment of the cell structure of the cylindrical solid oxide fuel cell according to the present invention.

FIG. 4 is a schematic structural diagram of a fourth embodiment of the cell structure of the cylindrical solid oxide fuel cell according to the present invention.

FIG. 5 is a schematic structural view of a conventional cell structure of a cylindrical solid electrolyte fuel cell.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base tube 2 fuel electrode 3 solid electrolyte 4 air electrode 5 interconnector 6, 7 lead film 8 end current collecting film 10 current collecting felt 12 current collecting member 12 a current collecting rod 13 current collecting member 13 a flange 14 lead wire 15 current collecting felt Reference Signs List 16 current collecting member 16a pipe 16b nut 17 current collecting felt 17a hole 17b fold 18 current collector plate

Continued on the front page (72) Koji Ikeda 1-1, Akunouracho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Junichi Kamimae 1-1, Akunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. (72) Inventor Kenichiro Kosaka 5-717-1, Fukabori-cho, Nagasaki-shi, Nagasaki F-term (reference) 5H026 AA05 CC06 CV02 CX09 EE02

Claims (1)

[Claims] 1. A plurality of unit cell films connected via an interconnector along an axial direction are formed on an outer peripheral surface of a base tube, and the unit cell located on the outermost end side in the axial direction of the base tube. A cell structure of a cylindrical solid electrolyte fuel cell in which lead films respectively connected to the membrane are formed on both ends in the axial direction of the outer peripheral surface of the base tube, wherein a lead wire is wound around at least one of the lead films. A cell structure of a cylindrical solid electrolyte fuel cell, wherein electric power is taken out through a lead wire.