JP2008021549A - Separator, fuel cell device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection, including a series connection or parallel connection or both without an external wiring, when a fuel cell device is constructed to a cell structure in which the membrane electrode assemblies are put between two or more separators. <P>SOLUTION: A both-side separator 1A has a serpentine groove 121A and an internal conductive film 131A, around its corresponding periphery on the front surface of a third substrate 13A, two or more third connectors 139A one of which is connected to the internal conductive film 131A; the others are insulated a serpentine groove 141A and an internal conductive film 132A, around its corresponding periphery on the back surface of the third substrate 13A; and two or more fourth connectors 130A one of which is connected to the internal conductive film 132A and the others are isolated. Each connector corresponding to from first to fourth 113A, 139A, 130A, or 153A is formed on respective substrates 11A, 13A and 15A at corresponding position and connected each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a separator, a fuel cell device, and an electronic device.

  In recent years, research and development have been actively conducted on fuel cells that can achieve high energy use efficiency. A fuel cell is one that directly extracts electrical energy from chemical energy by electrochemically reacting hydrogen gas in the anode gas and oxygen gas in the air, and is positioned as a promising battery with great potential. Yes.

  Conventional fuel cells are stacked by alternately laminating membrane electrode assemblies and separators, which are conductive substrates, and are composed of two separators and a membrane electrode assembly sandwiched therebetween. Cells are connected in series. The membrane / electrode assembly has a rectangular polymer electrode on both sides of the solid polymer electrolyte membrane. In the following, for simplicity, the surface of the electrode that contacts the solid polymer electrolyte membrane is used. And a membrane electrode assembly including a gas diffusion layer having the same shape as that of the electrode on the opposite surface and a frame-shaped gasket provided so as to surround the electrode and the gas diffusion layer. Define and describe. The separator has a flow path formed on both sides, and the anode gas flows through the flow path formed on one side of the separator, and the cathode gas flows through the flow path formed on the other side. Yes.

When the fuel cells are connected in series as described above, the same amount of current flows through all the fuel cells, and therefore, for example, power generation of one fuel cell among a plurality of stacked fuel cells. If the efficiency is low, a large load is applied to the fuel cell and a reverse voltage is generated. A fatal phenomenon such as elution of the electrode catalyst occurs, which may greatly affect the life of the fuel cell.
Therefore, when the fuel cell is operated in a state where the amount of current is suppressed in order to avoid the problems as described above, there has been a problem that the power generation performance as a whole is greatly reduced.

  FIG. 26 is an example of a graph showing the power generation characteristics of the fuel cell. From this graph, it can be seen that when one fuel cell has the characteristics indicated as “abnormal” in the graph, the voltage drops to 0 V or a negative voltage at 6A, greatly affecting the life of the fuel cell. Therefore, in practice, it is necessary to control the current to about 5.5 A as a whole. Considering this limitation only for one normally operating fuel cell rather than an abnormal fuel cell, a fuel cell that can operate at 0.59 V (3.54 W) at 6.0 A is By controlling the output of 5.5A, it becomes 0.61V (3.35w), and the performance is reduced by 5.4%. This decrease in performance is the same even when considered for the entire stack, and it is recognized that the effect of the failure of one fuel cell is large depending on the stack structure.

  One method for avoiding the influence of the above problem is to electrically connect fuel cells in parallel. FIG. 27 is a graph showing the power generation characteristics of the fuel cell when the fuel cells are connected in parallel. There is a system operating at 6A, 0.59V with two fuel cells when operating normally. Here, when the same problem as described above occurs in one cell, if the current value applied to the two fuel cells is fixed, it is electrically connected in parallel, so the total current value is 12A. Thus, the fuel cells are adjusted and operated at the same voltage (changes as indicated by arrows X and Y in the graph). As a result, even if a problem occurs suddenly with respect to one fuel battery cell, an effect that it is difficult to drop into the limit voltage due to the effect of supplementing with another normal fuel battery cell is recognized. In addition, this has the effect of further stabilizing when not only two fuel cells but a larger number of fuel cells are electrically connected in parallel.

Here, as a technology for connecting the fuel cells in parallel, a conductive layer that contacts the gas diffusion layer is provided in the region where the flow path is formed on both sides or one side of the separator, which is an insulating substrate, and connected to this conductive layer. In addition, a structure is known in which an external connection terminal connected to the above-described conductive layer is provided outside a region where a flow path is formed. In this case, the membrane electrode assembly is disposed so that the conductive layer provided on each surface of the double-sided separator disposed in the middle portion of the stack and each anode electrode of the two membrane electrode assemblies are in contact with each other. Thus, the first external connection terminal connected to the conductive layer is used as a negative electrode terminal. Further, the two single-sided separators disposed at both ends of the stack and sandwiching the membrane electrode assembly between the two-sided separators are in contact with the cathode electrodes of the two membrane electrode assemblies. A structure in which a layer is provided and a second external connection terminal connected to these two conductive layers is used as a positive electrode terminal is known (see, for example, Patent Document 1).
JP 2004-055296 A

However, the fuel cell including the power generation cell stack described in Patent Document 1 (reference numeral 50 in FIG. 7 of the same cited document) is connected in parallel only within each power generation cell (reference numeral 10 in the same figure). . Therefore, when connecting a plurality of such power generation cells in series or in parallel, as in the prior art, there is no choice but to form wiring outside the stack, and external connection terminals provided for each power generation cell There is a problem that an external circuit for connecting them in parallel is required, the number of parts increases, and the assembly process becomes complicated. As a result, the number of inspection processes is increased and the yield is reduced. Furthermore, since it is necessary to provide a circuit for parallel connection outside the power generation cell stack, there is also a problem that the size of the fuel cell with respect to the unit power generation amount increases.
In addition, since each power generation cell of the technique described in Patent Document 1 can output only a unit power generation amount, a booster circuit is necessary when such a power generation cell fuel cell is used in general electronic equipment. However, since the voltage corresponding to the fuel cell is too small, it is difficult or impossible to realize in a general electronic device, or there is a problem that power loss increases.
The present invention has been made in view of the above circumstances, and electrical connection including series connection or parallel connection between power generation cells can be easily realized without providing external wiring. An object of the present invention is to provide a separator and a fuel cell device that can obtain stable electric power at an output, have few assembly steps, and do not increase in size.

In order to solve the above problem, the separator according to claim 1 is a separator including one or more insulating substrates,
A gas flow path through which gas flows on one surface of the separator, a first conductive layer having conductivity, and a plurality of first connection terminals are formed,
At least one of the plurality of first connection terminals and the first conductive layer are connected,
At least one other of the plurality of first connection terminals and the first conductive layer are insulated,
A plurality of second connection terminals respectively corresponding to any one of the plurality of first connection terminals are formed on the other surface of the separator.

The invention according to claim 2 is another separator used in combination with the one separator according to claim 1,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A plurality of second connection terminals of other separators respectively corresponding to any one of the plurality of first connection terminals of the other separators are formed on the other surface of the other separators.

  According to the invention described in claim 1 or 2, the first conductive layer having conductivity and the plurality of first connection terminals are formed on one surface of the separator, and at least one of the plurality of first connection terminals; Connecting the first conductive layer, insulating at least one of the plurality of first connection terminals and the first conductive layer, and one of the plurality of first connection terminals on the other surface of the separator, respectively Since a plurality of corresponding second connection terminals are formed, when a fuel cell device including a cell structure in which a membrane electrode assembly is sandwiched between two separators having this configuration is configured, such cell structures Can be connected in parallel without providing external wiring.

The separator according to claim 3 is a separator including one or more insulating substrates,
A gas flow path through which gas flows on one surface of the separator, a first conductive layer having conductivity, and a plurality of first connection terminals are formed,
At least one of the plurality of first connection terminals and the first conductive layer are connected,
At least one other of the plurality of first connection terminals and the first conductive layer are insulated,
A gas flow path through which gas flows on the other surface of the separator, a second conductive layer having conductivity, and a plurality of second connection terminals are formed,
At least one of the plurality of second connection terminals and the second conductive layer are connected,
At least one other of the plurality of second connection terminals and the second conductive layer are insulated,
Any one of the plurality of first connection terminals and any one of the plurality of second connection terminals are connected.

The separator according to claim 4 is another separator used in combination with the one separator according to claim 3,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A second conductive layer of another separator connected to the first conductive layer of the other separator is formed on the other surface of the other separator.

The invention according to claim 5 is another separator used in combination with the one separator according to claim 3,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
An external connection terminal connected to the first conductive layer of the other separator is provided on the other surface of the other separator.

The invention described in claim 6 is another separator used in combination with the one separator described in claim 3, and includes one or more other insulating substrates,
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A plurality of second connection terminals of other separators are provided on the other surface of the other separator, and at least one of the second connection terminals of the other separators is connected to the first connection terminals of the other separators. Connected to the first conductive layer of the other separator,
At least one other second connection terminal of the other separator is connected to the first connection terminal of the other separator and insulated from the first conductive layer of the other separator.

  According to the invention described in any one of claims 3 to 6, a first conductive layer having conductivity and a plurality of first connection terminals are formed on one surface of the separator, and a plurality of first connection terminals are formed. A second conductive layer that connects at least one of the first conductive layers, insulates the first conductive layer from at least one of the plurality of first connection terminals, and has conductivity on the other surface of the separator. A plurality of second connection terminals, connecting at least one of the plurality of second connection terminals and the second conductive layer, and at least one other of the plurality of second connection terminals and the second conductive layer, Since any one of the plurality of first connection terminals and any one of the plurality of second connection terminals are connected, a membrane electrode assembly is interposed between two separators having this configuration. When a fuel cell device including a sandwiched cell structure is configured, such a cell The structure together without providing external wiring can be connected in parallel.

The invention according to claim 7 is the separator according to claim 3,
It has a plurality of holes through which bolts are inserted,
The plurality of first connection terminals are provided between the plurality of holes.

  According to the invention described in claim 7, the first conductive layer having conductivity and the plurality of first connection terminals are formed on one surface of the separator, and at least one of the plurality of first connection terminals and the first Connecting the conductive layer, insulating at least one of the plurality of first connection terminals from the first conductive layer, and having conductivity on the other surface of the separator and the plurality of second connection terminals And connecting at least one of the plurality of second connection terminals and the second conductive layer, insulating at least one of the plurality of second connection terminals and the second conductive layer, and connecting the plurality of first connections Since any one of the terminals and any one of the plurality of second connection terminals are connected, a fuel cell device including a cell structure in which a membrane electrode assembly is sandwiched between two separators having this configuration Configured, external cell wiring between such cell structures Without kicking, it can be connected in parallel. Further, since the plurality of first connection terminals are provided between the plurality of holes through which the bolts are inserted, the above-described connection can be realized without increasing the size of the fuel cell device.

  A fuel cell device according to an eighth aspect includes the separator according to the third aspect.

A fuel cell device according to a ninth aspect includes a separator according to the third aspect, another separator according to the fourth aspect, and a membrane electrode joint in which at least one electrode is provided on each side of the electrolyte membrane. With body,
One surface of the one separator and one surface of the other separator are arranged to face each other, and the membrane electrode assembly is disposed between one surface of the other separator and one surface of the one separator. It includes a sandwiched cell structure.

A fuel cell device according to claim 10 comprises a plurality of the separators according to claim 3 and a membrane electrode assembly in which at least one electrode is provided on each side of the electrolyte membrane,
One surface of one of the plurality of separators and the other surface of the other one of the plurality of separators are arranged to face each other, and the membrane electrode assembly is the plurality of the plurality of separators. And a cell structure sandwiched between one surface of one separator and the other surface of the other one of the plurality of separators.

  According to the invention described in any one of claims 8 to 10, since the separator according to claim 3 is provided, the cell structures in which the membrane electrode assembly is sandwiched between the two separators are connected to the external wiring. It is possible to connect in parallel without providing.

  An electronic device according to an eleventh aspect includes the fuel cell device according to any one of the eighth to tenth aspects.

  According to the eleventh aspect of the present invention, since the fuel cell device according to any one of the eighth to tenth aspects is provided, the cell structures in which the membrane electrode assembly is sandwiched between two separators are externally connected. It is possible to connect in parallel without providing wiring.

  According to the present invention, when a fuel cell device including a cell structure in which a membrane electrode assembly is sandwiched between two separators is configured, such cell structures are connected in parallel without providing external wiring. Can do.

[First embodiment]
First, as a first embodiment, a fuel cell device 5 using the double-sided separators 1A, 1B, 1C, 1D, 1E, single-sided separators 2A, 3A, etc. shown in FIG. It demonstrates with the electric power generating apparatus 400. FIG.
FIG. 1 is a block diagram of a power generation device 400 provided with the fuel cell device 5. The power generation device 400 is provided in a notebook personal computer, a mobile phone, a PDA (Personal Digital Assistant), an electronic notebook, a wristwatch, a digital still camera, a digital video camera, a game device, a game machine, and other electronic devices. Yes, it is used as a power source for operating the electronic device main body.

  The power generation apparatus 400 includes a fuel container 401 that stores fuel such as methanol and water separately or in a mixed state, a vaporizer 403 that vaporizes the fuel and water supplied from the fuel container 401, and fuel from the fuel container 401. A fuel pump 402 for sucking water and supplying the sucked fuel and water to the vaporizer 403, and a mixture of the fuel and water supplied from the vaporizer 403 with hydrogen gas, carbon dioxide gas, etc. , (2), and the carbon monoxide in the gas mixture supplied from the reformer 404 is oxidized from the gas mixture by oxidizing the gas as shown in the chemical reaction formula (3). A carbon monoxide remover 405 that removes carbon dioxide, and a fuel cell device 5 that generates electric energy by an electrochemical reaction between hydrogen gas and oxygen gas in the outside air of the gas mixture supplied from the carbon monoxide remover 405 Comprises an air pump 406 for supplying suction air to the carbon monoxide remover 405, and a fuel cell apparatus 5 sucks the outside air of the air.

CH3OH + H2O → 3H2 + CO2 (1)
2CH3OH + H2O → 5H2 + CO + CO2 (2)
2CO + O2 → 2CO2 (3)

  In addition, the fuel stored in the fuel container 401 is applicable to a compound containing hydrogen atoms such as alcohols such as ethanol or gasoline instead of methanol.

2 is a cross-sectional view of the stack type fuel cell device 5 taken along the IVb-IVb cutting line of FIG. 3 in parallel with the thickness direction, and FIG. 3 is a plan view of the double-sided separator 1A in FIG. 4A is an enlarged cross-sectional view when the membrane electrode assembly 6 in FIG. 2 is cut in parallel with the thickness direction along the IVb-IVb cutting line, FIGS. 4B and 4C. 2 is an enlarged cross-sectional view when the double-sided separator 1A in FIG. 2 is cut parallel to the thickness direction along the IVb-IVb cutting line or IVc-IVc cutting line, respectively, FIGS. FIG. 4 is an enlarged cross-sectional view when the single-sided separator 2A in FIG. 2 is cut in parallel with the thickness direction along the IVb-IVb cutting line or IVc-IVc cutting line.
The fuel cell device 5 includes a single-sided separator 3A, a membrane electrode assembly 6, a double-sided separator 1E, a membrane electrode assembly 6, a double-sided separator 1D, a membrane electrode assembly 6, a double-sided separator 1C, a membrane electrode assembly 6, and a double-sided separator 1B. Cell stack 71 in which membrane electrode assembly 6, double-sided separator 1 A, membrane electrode assembly 6, and single-sided separator 2 A are stacked in order from the top, current collector 72 on the anode side of cell stack 71, and cathode side of cell stack 71 Current collector plate 73 and the like.

  The cell stack 71 is formed by stacking a plurality of fuel cells that are electrically connected. Here, each fuel cell has a structure in which the membrane electrode assembly 6 is sandwiched between the single-sided separator 3A and the double-sided separator 1E, a structure in which the membrane electrode assembly 6 is sandwiched between the double-sided separators 1A to 1E, and the membrane electrode assembly. 6 is a structure sandwiched between the double-sided separator 1A and the single-sided separator 2A. The double-sided separators 1A to 1E serve as both structures of adjacent fuel cells, and the adjacent fuel cells 1A to 1E are connected in series or in parallel as will be described later. The number of fuel cells to be stacked is determined by the electromotive force of each membrane electrode assembly 6, 6,... And the output voltage required for the fuel cell device 5.

The membrane electrode assemblies 6, 6,... Will be described with reference to FIG. All membrane electrode assemblies 6 are similarly configured.
The membrane electrode assembly 6 includes a solid polymer electrolyte membrane 61, gas diffusion layers 62a and 62b, catalysts 63a and 63b, and gaskets 64a and 64b.

  The solid polymer electrolyte membrane 61 is a membrane formed in a rectangular shape, and selectively transmits hydrogen ions (H +). Conductive catalysts 63a and 63b are provided in a rectangular shape on both surfaces of the solid polymer electrolyte membrane 61 and in the center of each. The catalysts 63a and 63b may be, for example, a catalyst supported on a conductive carrier. On the catalysts 63a and 63b, gas diffusion layers 62a and 62b having the same shape as the catalysts 63a and 63b are arranged so as to be in contact with the catalysts 63a and 63b, respectively. The gas diffusion layers 62a and 62b permeate and diffuse gases such as hydrogen, water, and oxygen. The catalyst 63a and the gas diffusion layer 62a function as an anode (hydrogen electrode), and the catalyst 63b and the gas diffusion layer 62b function as a cathode (oxygen electrode).

  A rectangular frame-shaped gasket 64a is provided on one surface of the outer periphery of the solid polymer electrolyte membrane 61 so as to surround the catalyst 63a and the gas diffusion layer 62a, and the other surface has a catalyst. A rectangular frame gasket 64b is provided so as to surround 63b and the gas diffusion layer 62b. The gaskets 64a and 64b are insulators and elastic bodies. The gaskets 64a and 64b function as spacers for disposing the gas diffusion layers 62a and 62b and the catalysts 63a and 63b between the single-sided separators 2A and 3A sandwiching the membrane electrode assembly 6 and the double-sided separators 1A to 1E. Anode gas supplied from single-sided separator 2A, cathode gas flowing through meandering grooves 121A-121E formed in double-sided separators 1A-1E, and anode flowing through meandering grooves 141A-141E formed in double-sided separators 1A-1E It also functions as a gas seal that prevents gas from leaking out of the fuel cell device 5. Such gaskets 64a and 64b can be formed using, for example, isobutylene rubber.

  The plurality of double-sided separators are arranged at one end of the fuel cell device 5 with one membrane electrode assembly 6, 6,... Sandwiched between adjacent double-sided separators 1E, 1D, 1C, 1B, 1A. They are stacked in order from the side. The double-sided separator 1E disposed on one end side is provided with a single-sided separator 3A across the membrane electrode assembly 6, and the double-sided separator 1A disposed on the other end side is provided with a membrane electrode joined A single-sided separator 2A is provided with the body 6 in between.

As will be described in detail later, as shown in FIG. 4, the double-sided separator 1A includes four first connectors (first connection terminals) 113A, 113A,. Connection terminals) 153A, 153A,. The double-sided separator 1A includes four third connectors (third connection terminals) 139A, 139A,... And 4 corresponding to the first connectors 113A, 113A,. Four fourth connectors (fourth connection terminals) 130A, 130A,... Are provided at positions corresponding to each other along a straight line parallel to the stacking direction of the fuel cells. In addition, these corresponding connectors are electrically connected by internal wiring.
Further, the first connectors 113A, 113A,... And the second connectors 153A, 153A,... Are each formed within a shortest closed curve surrounding a plurality of fastening holes provided in each board. For example, in the first embodiment, these first connectors 113A, 113A,... And second connectors 153A, 153A,... Have two fastening holes 112A, 112A, 152A, 152A adjacent to each other. The widths of the first connectors 113A, 113A,... And the second connectors 153A, 153A,... In the direction perpendicular to the straight lines are set to the respective fastening holes 112A, 152A. (See FIGS. 3 and 6).

Here, as shown in FIG. 3, in each of the four connectors, the position of the lower left connector is X1, the position of the upper left connector is X2, the position of the upper right connector is X3, the position of the lower right connector is X4, Hereinafter, these positions will be described using X1 to X4.
Further, as shown in FIG. 4, the double-sided separator 1 </ b> A includes an anode-side surface conductive film (first conductive layer) 127 </ b> A that contacts the gas diffusion layer 62 a of the membrane electrode assembly 6 disposed on the front and back sides, and a gas. An internal conductive film that includes a cathode-side surface conductive film (second conductive layer) 147A that is in contact with the diffusion layer 62b, and is connected to the anode-side surface conductive film 127A by a via wiring formed in a micro hole portion 126A described later. (Third conductive layer) 131A and an internal conductive film (fourth conductive layer) 132A connected to the cathode side surface conductive film 147A by via wiring formed in a micro hole 146A described later are provided inside. The internal conductive films 131A and 132A are respectively connected to the first connector 113A, 113A,... And the fourth connector 153A, 153A at any one of the positions X1 to X4. ... it is connected to at least one one of.

  In double-sided separator 1A of the present embodiment, internal conductive film 131A is connected to first connector 113A at position X2, and internal conductive film 132A is connected to fourth connector 153A at position X2. As will be described in detail later, the other double-sided separators 1B, 1C, and 1E shown in FIG. 2 have the same configuration as the double-sided separator 1A, but each internal conductive film is connected to the first or second connector. The positions (X1 to X4) are different from the above-described double-sided separator 1A. 2, the position where each internal conductive film and the first or second connector are connected is the same as the double-sided separator 1A shown in FIG. 4.

  Here, in the following, the first connector at position Xn (n is a natural number) is electrically connected to the anode-side surface conductive film, and the second connector at position Xm (m is a natural number) is connected to the cathode-side surface conductive film. The electrically connected double-sided separator is referred to as “XnXm double-sided separator” using indices n and m. In particular, when n = m, it is called “same type XnXm double-sided separator”, and when n ≠ m, it is called “atypical XnXm double-sided separator”. For example, in the case of the above-mentioned double-sided separator 1A, it is called the same type X2X2 double-sided separator.

On the other hand, as shown in FIG. 5, the single-sided separator 2A has a plurality of first connectors (first connection terminals) 213A, 213A,... On the front surface and a conductive film (second conductive layer) 231A on the back surface. The portions corresponding to the first connectors 213A, 213A,... In the conductive film 231A are the second connectors 253A, 253A,. The first connector 213A at the position X1 and the second connector 253A are electrically connected by via wiring formed in the minute hole 229A, and the first connector 213A and the second connector at other positions X2, X3, and X4. It is not connected to 253A. Further, the single-sided separator 2A includes a surface conductive film (first conductive layer) 227A that comes into contact with the gas diffusion layer 62a of the membrane electrode assembly 6 disposed on the surface side thereof, and is formed in a microporous portion 226A described later. The surface conductive film 227A is connected by the via wiring.
Moreover, although not shown in figure, the single-sided separator 3A provided in the edge part on the opposite side to the edge part in which the single-sided separator 2A was provided in the cell stack 71 also has the structure similar to the single-sided separator 2A. The single-sided separator 3A includes a surface conductive film (first conductive layer) that comes into contact with the gas diffusion layer 62b of the membrane electrode assembly 6 disposed on the front surface side (the lower surface side in FIG. 2), and is formed in a micropore. The back surface conductive film (second conductive layer) connected to the front surface conductive film by the formed via wiring is provided, and the back surface conductive film is located at the position X4 via the second connector provided at the position X4. Connected to the first connector. This connection configuration is not shown in FIG. 2, which is a cross-sectional view along a straight line connecting the positions X1 and X2.

Here, hereinafter, the single-sided separator in which the first connector at the position Xn (n is a natural number) is electrically connected to the backside conductive film is referred to as an Xn single-sided separator using an index n. For example, the above-described single-sided separator 2A is referred to as an X1 single-sided separator, and the single-sided separator 3A is referred to as an X4 single-sided separator.
Of the double-sided separators 1A to 1E, the anode-side single-sided separator 2A, and the cathode-side single-sided separator 3A as described above, those adjacent to each other are specifically electrically connected as follows.
As shown in FIG. 2, the second connector 353A of the cathode side X4 single-sided separator 3A and the first connector 113E of the X3X3 double-sided separator 1E adjacent thereto are in contact with each other and are conductive. Next, the second connector 153E of the X3X3 double-sided separator 1E and the first connector 113D of the X2X2 double-sided separator 1D adjacent thereto are in contact with each other and are conductive. Next, the second connector 153D of the X2X2 double-sided separator 1D and the first connector 113C of the X1X4 double-sided separator 1C adjacent thereto are in contact with each other and are conductive. Next, the second connector 153C of the X1X4 double-sided separator 1C and the first connector 113B of the X3X3 double-sided separator 1B adjacent thereto are in contact with each other and are conductive. Next, the second connector 153B of the X3X3 double-sided separator 1B and the first connector 113A of the X2X2 double-sided separator 1A adjacent thereto are in contact with each other and are in conduction. The second connector 153A of the X2X2 double-sided separator 1A and the first connector 213A of the anode-side X1 single-sided separator 2A adjacent thereto are in contact with each other and are conductive.

The conductive film 332A of the cathode side X4 single-sided separator 3A is fixed in contact with the anode side current collector 72. The anode-side current collecting plate 72 has an anode gas introduction hole, an anode gas discharge hole, a cathode gas introduction hole, and a cathode gas discharge hole (not shown). Further, the anode-side current collecting plate 72 is provided with a terminal on the anode side of the fuel cell device 5, and further, eight bolt fastening holes (not shown) are formed.
The conductive film 231A of the anode side X1 single-sided separator 2A is fixed in contact with the cathode side current collector plate 73. Further, the cathode-side current collecting plate 73 is provided with a cathode-side terminal of the fuel cell device 5, and further, eight bolt fastening holes (not shown) are formed.

  End plates 76 and 77 are disposed on the front surface of the anode current collector 72 and the back surface of the cathode current collector 73, respectively. The end plate 76 fixed to the anode side current collecting plate 72 has hollow gas joints 78, 78,..., An anode gas introduction hole formed in the hollow and anode side current collecting plate 72, and an anode gas discharge. The hole, the cathode gas introduction hole, and the cathode gas discharge hole are attached so as to communicate with each other.

Then, the anode side current collecting plate 72, the cathode side X4 single-sided separator 3A, the membrane electrode assembly 6, the plurality of double-sided separators 1A to 1E, the anode side X1 single-sided separator 2A, and the cathode side current collecting plate 73 are laminated to form an anode side current collecting. End plates 76 and 77 are arranged on the anode-side current collector plate 72 and the cathode-side current collector plate 73 so as to sandwich the front surface of the current plate 72 and the back surface of the cathode-side current collector plate 73, and are fastened by bolts (not shown). Thus, the fuel cell device 5 is configured.
In addition to the fastening by the bolt, a structure having a small contact resistance may be obtained by joining the separators by laser welding or brazing after assembling. In addition, at the joint surface between the separators adjacent to each other, the surface of the first connector of one separator and the surface of the second connector of the other separator are each provided with a fine projection to give elasticity and tightening pressure. Thus, a structure having a height error absorbing function may be used.

Next, generation of electric power by the fuel cell device 5 will be described.
The anode gas supplied to the fuel cell device 5 through the gas joint 78 flows through the meandering grooves 221A, 121A to 121E, passes through the anode gas discharge hole 223A, and is discharged from the gas joint 78. When the anode gas flows through the meandering grooves 221A and 121A to 121E, when the anode gas diffuses through the gas diffusion layer 62a and comes into contact with the catalyst 63a, the hydrogen gas of the catalyst 63a is expressed as shown in the electrochemical reaction formula (4). Under the action, it is separated into hydrogen ions and electrons.
H2 → 2H ++ 2e- (4)

The electrons conduct through the catalyst 63a and the gas diffusion layer 62a. Then, in the double-sided separators 1A, 1B, 1D, and 1E, the anode-side surface conductive films 127A, 127B, 127D, and 127E, and the anode-side internal conductive film 139A, respectively. , 139B, 139D, 139E, the cathode-side internal conductive films 130A, 130B, 130D, 130E and the cathode-side surface conductive films 147A, 147B, 147D, 147E are electrically connected to the adjacent membrane electrode assemblies 6, 6,. Conducted to the gas diffusion layer 62b.
Further, in the double-sided separator 1C, the anode side surface conductive film 127C, the anode side internal conductive film 139C, the cathode side internal conductive film 130C, and the X1 second connector are passed through the external circuit from the cathode side terminal. It returns to the anode current collector 72 from the anode side terminal, and is conducted to the gas diffusion layer 62b of the membrane electrode assembly 6 through the cathode side single-sided separator 3A.
Further, the electrons taken out by the gas diffusion layer 62a of the membrane electrode assembly 6 are passed through the anode side surface conductive film 227A, the conductive film 231A and the cathode side current collecting plate 73 formed on the anode side single-sided separator 2A. The cathode side terminal passes through an external circuit, returns from the anode side terminal to the anode side current collecting plate 72, and is conducted to the gas diffusion layer 62b of the membrane electrode assembly 6 through the cathode side single-sided separator 3A.
Hydrogen ions pass through the solid polymer electrolyte membrane 61 and are conducted to the cathode-side catalyst 63b.

On the other hand, a cathode gas (here, air) containing oxygen gas is supplied to the cathode gas introduction hole 224A through the gas coupling 78, and the meandering groove covered with the gas diffusion layer 62b of the membrane electrode assembly 6, 6,. 141A to 141E and 321A flow through the cathode gas discharge hole 225A and are discharged from the gas joint 78. When the cathode gas flows through the meandering grooves 141A to 141E and 321A, when the cathode gas diffuses through the gas diffusion layer 62b and contacts the catalyst 63b, the catalyst 63b is acted as shown in the electrochemical reaction formula (5). Then, oxygen reacts with the hydrogen ions that have passed through the solid polymer electrolyte membrane 61 and the electrons conducted to the gas diffusion layer 62b to generate water.
2H ++ 1 / 2O2 + 2e- → H2O (5)

As described above, electromotive force is generated on both surfaces of each membrane electrode assembly 6, 6,.
Thus, in the fuel cell device 5, electrochemical reactions (4) and (5) occur in the catalysts 63a and 63b and the gas diffusion layers 62a and 62b, and the solid polymer electrolyte membrane corresponding to the gas diffusion layers 62a and 62b. An electromotive force is generated by passing hydrogen ions through the portion 61.

  The gas diffusion layers 62a and 62b do not need to be provided if they are unnecessary due to the nature of the battery. Further, the solid polymer electrolyte membrane 61 is not limited to the form of a membrane, and may be a plate-like one that can be stacked. Furthermore, the membrane electrode assembly 6 may be configured to include only the solid polymer electrolyte membrane 61 and the gas diffusion layers 62a and 62b. In this case, the catalysts 63a and 63b and the gaskets 64a and 64b 6 and a separate member.

Next, the configurations of the above-described double-sided separators 1A to 1E, the anode-side single-sided separator 2A, and the cathode-side single-sided separator 3A will be described in more detail.
6A shows the first substrate 11A constituting the double-sided separator 1A, and is a cross-sectional plan view taken along the cutting line aa of FIG. 4, and FIGS. The second substrate 12A is shown, (b) is a cutting line bb, (c) is a cross-sectional view taken along the cutting line cc, (d), (e), (f) are 3D shows the third substrate 13A, (d) is a cut line dd, (e) is a cut line ee, (f) is a plan sectional view when cut along the cut line ff, (g) and (h) show the fourth substrate 14A, (g) is a cutting line g-g, (h) is a cross-sectional view taken along the cutting line h-h, and (i) is a cross-sectional view. FIG. 10 is a plan sectional view showing the fifth substrate 15A and being cut along a cutting line i-i.
The double-sided separator 1A is formed by laminating five insulating substrates 11A to 15A formed on a rectangular plate (or a square plate). Examples of the insulating substrates 11A to 15A include ceramics.
The first substrate 11A, which is the surface of the double-sided separator 1A (upper surface in FIG. 4), has a rectangular opening 111A that penetrates both sides at the center. The opening 111A exposes an anode-side surface conductive film (first conductive layer) 127A described later, and eight bolt fastening holes 112A, 112A,... Are formed around the opening 111A at predetermined intervals. Yes. Further, in the vicinity of the bolt fastening holes 112A, 112A,..., An anode-side internal conductive film (first conductive layer) 131A, which will be described later, is separated from the opening 111A so as not to communicate with the opening 111A. Four first connectors (first connection terminals) 113A, 113A,... Made of a conductive thin film for electrical connection with (not shown) are formed through the front and back surfaces of the insulating substrate 11A.
Here, each of the four first connectors 113A, 113A,... Is formed within the shortest closed curve surrounding a plurality of fastening holes provided in the board. For example, in the first embodiment, these first connectors 113A, 113A,... Are provided along a straight line on which two adjacent fastening holes 112A, 112A are arranged, In addition, the width of the first connectors 113A, 113A,... In the direction perpendicular to the straight line is formed to be equal to or smaller than the width of each fastening hole 112A, 112A,. The second connectors 153A, 153A,..., The third connectors 139A, 139A,... And the fourth connectors 130A, 130A,. Each of the four first to fourth connectors provided in the other double-sided separators 1B and 1C, the anode-side single-sided separator 2A, and the cathode-side single-sided separator 3A described later have the same configuration.
As a result, the separator of the present embodiment can be configured so as not to be larger than the shape of the conventional separator even if the first to fourth connectors are provided in a plane perpendicular to the stack direction on each substrate. it can.

  Next, the second substrate 12A laminated in contact with the back surface (the lower surface in FIG. 4) of the first substrate 11A has the same shape as the first substrate 11A and has a meandering shape in the center. A groove 121A is formed. One end of the meandering groove 121A communicates with the anode gas introduction hole 122A that penetrates the front and back surfaces of the second substrate 12A, and the other end communicates with the anode gas discharge hole 123A that penetrates the front and back surfaces of the second substrate 12A. is doing. The anode gas introduction hole 122 </ b> A and the anode gas discharge hole 123 </ b> A are located on the diagonal line of the second substrate 12. Further, a cathode gas discharge hole 125A is formed in the anode gas introduction hole 122A so as to be symmetric with respect to the center line in the short direction of the second substrate 12A, and the cathode gas introduction hole 124A is formed on the diagonal line of the cathode gas discharge hole 125A. Is formed. The cathode gas introduction hole 124A and the cathode waste discharge hole 125A penetrate the front and back surfaces of the second substrate 12A.

  The anode gas means a gas containing hydrogen gas as fuel for generating power from the fuel cell. Specifically, the anode gas includes hydrogen gas generated by a reformer 404 (see FIG. 1) described later, and other gases. It means a gas containing a by-product gas (for example, carbon dioxide gas). The cathode gas means a gas containing oxygen gas for generating power from the fuel cell, and specifically means air taken from the fuel cell. The anode gas is supplied from a carbon monoxide remover 405 (see FIG. 1) described later, and the cathode gas is supplied by an air pump described later.

In addition, a large number of fine holes that penetrate the front and back surfaces of the second substrate 12A are formed at locations corresponding to the openings 111A of the first substrate 11A, surrounding the meandering groove 121A, thereby forming the fine hole portion 126A. Has been. The fine hole portion 126A has a shape corresponding to the corresponding opening portion 111A, and has a rectangular shape here. Then, an anode side surface conductive film 127A is formed so as to cover the surface of the rectangular fine hole portion 126A, and a via wiring is formed by filling the inside of the fine hole portion 126A with a conductive material. Has been. This conductive material may be the same material as the anode-side surface conductive film 127A described above, and is preferably a low resistivity material.
Further, eight bolt fastening holes 128A, 128A,... Are formed in the second substrate 12A corresponding to the bolt fastening holes 112A, 112A,. In addition, a plurality of fine holes penetrating the front and back surfaces are formed corresponding to the four first connectors 113A, 113A,... Formed on the first substrate 11A, and the fine hole portions 129A, 129A,. ing. These fine hole portions 129A, 129A,... Have shapes corresponding to the corresponding first connectors 113A, 113A,. In addition, via wiring is formed by filling the circular fine holes 129A, 129A,... With a conductive material.

The third substrate 13A laminated in contact with the back surface of the second substrate 12A has the same shape as the first and second substrates 11A and 12A, and the opening of the first substrate 11A is formed at the center of the surface. A rectangular anode-side internal conductive film 131A is formed so as to correspond to the portion 111A. On the other hand, a cathode side internal conductive film (second conductive layer) 132A is also formed at the center of the back surface corresponding to the anode side internal conductive film 131A.
At the four corners of both internal conductive films 131A and 132A, an anode gas introduction hole 133A, an anode gas discharge hole 134A, a cathode gas introduction hole 135A, and a cathode gas discharge hole 136A penetrate the front and back surfaces of the third substrate 13A. Is formed. Further, around the inner conductive films 131A and 132A, eight bolt fastening bolts corresponding to the bolt fastening holes 112A, 112A,..., 128A, 128A,. Holes 137A, 137A,... Are formed.
In the positions of X1 to X4, fine hole portions 138A, 138A,... Are formed through the front and back surfaces corresponding to the first connectors 113A, 113A,. Four third connectors (first connection terminals) 139A, 139A,... Made of a conductive thin film are formed so as to cover the surfaces of the holes 138A, 138A,. These fine hole portions 138A, 138A,... Have shapes corresponding to the corresponding third connectors 139A, 139A,. In addition, via wiring is formed by filling the circular fine holes 138A, 138A,... With a conductive material.

The X2 third connector 139A is continuously formed on the surface of the third substrate 13A so as to be electrically connected to the anode-side internal conductive film 131A, and is electrically connected to the anode-side internal conductive film 131A. Yes. The other three third connectors 139A, 139A,..., X1, X3, X4 are formed away from the anode-side internal conductive film 131A and are not conductive.
Further, four fourth connectors (fourth connection terminals) 130A, 130A,... Made of a conductive thin film are formed at positions X1 to X4 so as to cover the back surfaces of the fine hole portions 138A, 138A,. The fourth connectors 130A, 130A,... Of X1 are continuously formed so as to be electrically connected to the cathode side internal conductive film 132A, and are electrically connected to the cathode side internal conductive film 132A. The other four fourth connectors 130A, 130A,... X1, X3, and X4 are formed away from the cathode-side internal conductive film 132A and are not conductive.

  The fourth substrate 14A stacked in contact with the back surface of the third substrate 13A has the same shape as the first to third substrates 11A to 13A, and a meandering groove 141A is formed in the center thereof. Has been. One end of the meandering groove 141A communicates with the cathode gas introduction hole 144A that penetrates the fourth substrate 14A, and the other end communicates with the cathode gas discharge hole 145A that penetrates the fourth substrate 14A. Further, the anode gas introduction hole 142A and the anode gas discharge hole 143A are also formed in the fourth substrate 14A corresponding to the anode gas introduction holes 122A and 133A and the anode gas discharge holes 123A and 134A described above.

Further, a fine hole portion 146A that surrounds the meandering groove 141A and penetrates the front and back surfaces of the fourth substrate 14A is formed at a location corresponding to the opening 111A of the first substrate 11A. A cathode-side surface conductive film 147A is formed in a rectangular shape so as to cover the surface of the fine hole portion 146A. The fine hole 146A has a shape corresponding to the corresponding opening 111A, and is rectangular here. In addition, via wiring is formed in the rectangular fine hole portion 146A by being filled with a conductive material.
Further, the fourth board 14A is formed with eight bolt fastening holes 148A, 148A,..., Similarly to the first to third boards 11A to 13A, and the first to fourth connectors 113A, 113A,. , 139A, 139A,..., 130A, 130A,... Have fine holes 149A, 149A,. These fine hole portions 149A, 149A,... Have shapes corresponding to the corresponding first to fourth connectors 113A, 113A,..., 139A, 139A, ..., 130A, 130A,. It has become. In addition, via wiring is formed by filling the circular fine hole portions 149A, 149A,... With a conductive material.

  The fifth substrate 15A laminated on the back surface of the fourth substrate 14A has the same shape as the first to fourth substrates 11A to 14A, and a rectangular opening 151A penetrating both surfaces is formed at the center thereof. Has been. The opening 151A exposes the cathode-side surface conductive film (second conductive layer) 147A of the fourth substrate 14A, and the periphery of the opening 151A is similar to the first to fourth substrates 11A to 14A. Two bolt fastening holes 152A, 152A,... Are formed. Further, the cathode-side internal conductive film 132A of the third substrate 13A is electrically connected to an external connection terminal (not shown) at positions X1 to X4 that are separated from the opening 151A so as not to communicate with the opening 151A. Four second connectors (second connection terminals) 153A, 153A,... Made of a conductive thin film are formed.

As described above, via wiring is formed in the circular fine holes 129A, 129A,..., 138A, 138A,..., 149A, 149A,. Thus, the first connectors 113A, 113A, ..., the third connectors 139A, 139A, ..., the fourth connectors 130A, 130A, ... and the second connectors 153A, 153A, ... are connected to each other. Further, the first connectors 113A, 113A,... And the second connectors 153A, 153A,... Are connected to external connection terminals (not shown). Further, the X2 third connector 139A is continuously formed so as to be electrically connected to the anode side internal conductive film 131A, and the X2 fourth connector 130A is electrically connected to the cathode side internal conductive film 132A. The X2 third connector 139A and the X2 fourth connector 130A are connected to each other by the X2 fine hole portion 138A, so that the anode side internal conductive film 131A and the cathode adjacent to each other are connected. The side internal conductive film 132A conducts.
Further, as described above, via wiring is formed in the rectangular fine hole portions 126A and 146A of the second and fourth substrates 12A and 14A, whereby the anode-side surface conductivity of the second substrate 12A is formed. The conductive film 127A and the anode-side internal conductive film 131A of the third substrate 13A, and the cathode-side internal conductive film 132A and the cathode-side surface conductive film 147A of the fourth substrate 14A are electrically connected.
Thus, the X2X2 double-sided separator 1A including the X2 third connector 139A connected to the anode side internal conductive film 131A and the X2 fourth connector 130A connected to the cathode side internal conductive film 132A is The anode side surface conductive film 127A of the second substrate 12A and the cathode side surface conductive film 147A of the fourth substrate 14A are electrically connected through the X2 third connector 139A and the X2 fourth connector 130A. . Therefore, the membrane electrode assemblies arranged with the X2X2 double-sided separator 1A interposed therebetween are electrically connected to each other in series.
In the separator of this embodiment, the anode-side surface conductive film 127A of the second substrate 12A and the cathode-side surface conductive film 147A of the fourth substrate 14A are both the first connectors 113A and X2 of the X2. It is electrically connected to the second connector 153A, and is electrically connected to the connector provided at the corresponding position of the adjacent double-sided or single-sided separator via the X2 first connector 113A.

Since the same type of XnXm double-sided separator (for example, the above-mentioned X3X3 double-sided separator 1B, X2X2 double-sided separator 1D, X3X3 double-sided separator 1E) has the same configuration as that of the above-described X2X2 double-sided separator, the anode of the second substrate Since the side surface conductive film is electrically connected to the cathode side surface conductive film of the fourth substrate, the membrane electrode assemblies adjacent to each other are electrically connected in series. The anode side surface conductive film of the second substrate is electrically connected to the Xn first connector, and the cathode side surface conductive film of the fourth substrate is electrically connected to the Xm (n = m) second connector. In addition, the anode-side surface conductive film of the second substrate and the cathode-side surface conductive film of the fourth substrate are connected via the first connector or the second connector of Xn (which may be expressed as Xm), It is electrically connected to a connector provided at a corresponding position on either the front or back surface of the adjacent separator.
The equivalent circuit of the same type XnXm double-sided separator (n = m) as described above generally encloses the double-sided separators 1A, 1B, 1D, and 1E with dotted lines in the electric circuit diagram shown in FIG. 9B. It is expressed as Note that FIG. 9 will be described in detail later.

7A shows the first substrate 11C constituting the X1 × 4 double-sided separator 1C, (b) and (c) are the second substrate 12C, and (d), (e) and (f) are the third substrates. 13C, (g) and (h) show the fourth substrate 14C, (i) shows the fifth substrate 15C, and (a) to (i) are the cutting lines a- in FIG. It is a plane sectional view at the time of cutting along ai.
Like the X2X2 double-sided separator 1A, the X1X4 double-sided separator 1C is formed by laminating first to fifth substrates 11C to 15C, and among the four third connectors 139C, 139C, ... formed on the third substrate 13C. , X1 third connector 139C is formed continuously with anode-side internal conductive film 131C, and among the four fourth connectors 130C, 130C,..., X4 fourth connector 130C is formed on cathode-side internal conductive film 132C. It is formed continuously. In addition, since the other structure is the same as that of the X2X2 double-sided separator 1A, only the alphabetical character is changed to C with the same numeral and the description thereof is omitted.
In the X1X4 double-sided separator 1C configured in this way, the first connector 113C to the fourth connector 153C are electrically conductively connected, but the third connector 139C of X1 is continuously formed on the anode side internal conductive film 131C, Since the fourth connector 130C of X4 is formed continuously with the cathode side internal conductive film 132C, the adjacent anode side internal conductive film 131C and the cathode side internal conductive film 132C are insulated without being conducted. The As a result, the unusual X1X4 double-sided separator 1C is connected in parallel.
The first connector 113C, 113C,... And the third connector 139C, 139C,... Have a circular microscopic hole 129C, 129C,. .. And the fourth connectors 130C, 130C,... And vias formed in the circular microscopic holes 138C, 138C,. The fourth connectors 130C, 130C,... And the second connectors 153C, 153C,... Are connected to each other by via wirings formed in the circular fine holes 149C, 149C,. Further, the X1 third connector 139C is continuously formed so as to be electrically connected to the anode side internal conductive film 131C, and the X4 fourth connector 130C is electrically connected to the cathode side internal conductive film 132C. However, since the third connector 139C of X1 and the fourth connector 130C of X4 are insulated, the adjacent anode side internal conductive film 131C and cathode side internal conductive film 132C As a result, the anode side surface conductive film 127C of the second substrate 12C and the cathode side surface conductive film 147C of the fourth substrate 14C are insulated. As a result, as will be described in detail later, the membrane electrode assemblies arranged with the unusual X1X4 double-sided separator 1C interposed therebetween are electrically connected in parallel with each other. The anode side surface conductive film 127C of the second substrate 12C is electrically connected to the X1 first connector 113C, and the cathode side surface conductive film 147C of the fourth substrate 14C is electrically connected to the X4 second connector 153C. Yes.

Since each of the unusual XnXm double-sided separators (n ≠ m) has the same configuration as that of the above-described X1X4 double-sided separator, the anode-side surface conductive film of the second substrate and the cathode-side surface conductive of the fourth substrate. Since the conductive film is not conductive, the membrane electrode assemblies adjacent to each other are electrically insulated from each other. Further, the anode side surface conductive film of the second substrate is electrically connected to the Xn first connector, and the cathode side surface conductive film of the fourth substrate is electrically connected to the Xm (n ≠ m) second connector. In addition, the anode side surface conductive film of the second substrate is passed through the first connector of Xn, and the cathode side surface conductive film of the fourth substrate is passed through the second connector of Xm. It is electrically connected to a connector provided at a corresponding position on either the front or back surface.
The equivalent circuit of the atypical XnXm double-sided separator (n ≠ m) as described above is generally represented as a part surrounded by a dotted line in the double-sided separator 1C in the electric circuit diagram shown in FIG. 9B. Is done.

(A) of FIG. 8 shows the first substrate 21A constituting the single-sided separator 2A, and is a cross-sectional plan view taken along the cutting line aa of FIG. 5, (b) and (c) are The second substrate 22A is shown, (b) is a cutting line bb, (c) is a cross-sectional plan view taken along the cutting line cc, (d) shows the third substrate 23A. It is a plane sectional view at the time of cutting along cutting line dd.
The single-sided separator 2A is formed by laminating three insulating substrates (first to third substrates 21A to 23A) formed in a rectangular shape, and the first substrate 2A is the first embodiment. The same as the first substrate 11A constituting the X2X2 double-sided separator 1A, an opening 211A, four first connectors (third connection terminals) 213A, 213A,..., Eight bolt fastening holes 212A, 212A, ... are formed at predetermined locations.
The second substrate 22A is not provided with circular fine holes 129A, 129A,... Formed in X2 to X4 in the second substrate 12A of the first embodiment, and only the X1 is circular. A fine hole 229A is formed. In addition, the second substrate 22A includes a meandering groove 221A, a rectangular fine hole 226A, an anode side (or cathode side) surface conductive film (third conductive layer) 227A, an anode side introduction hole 222A, anode-side discharge hole 223A, cathode-side introduction hole 224A, cathode-side discharge hole 225A, eight bolt fastening holes 228A, 228A,... Are formed at the same predetermined positions as in the first embodiment.
The third substrate 23A has the same shape as the first and second substrates 21A, 22A, and constitutes the entire surface except for the portions corresponding to the second connectors 253A, 253A,... And the second connectors 253A, 253A,. A conductive film (fourth conductive layer) 231A, an anode gas introduction hole 233A, an anode gas discharge hole 234A, a cathode gas introduction hole 235A, a cathode gas discharge hole 236A, and eight bolt fastening holes 237A, 237A. Are formed at predetermined locations similar to those of the first embodiment. The second connectors 253A, 253A,... Are configured by the same member as the above-described conductive film 231A, are electrically connected to the conductive film 231A, and are provided on the above-described first substrate. It is provided at a position corresponding to each of the one connector 213A, 213A,.
Then, via wiring is formed in the circular minute hole portion 229A formed in X1 of the second substrate 22A, whereby the first connector 213A and the third substrate 23A including the conductive film 231A in X1 are formed. These components are connected to each other by being connected via the second connector 253A.
In addition, via wiring is formed in the rectangular fine hole 226A of the second substrate 22A, whereby the anode side (or cathode side) surface conductive film 227A and the conductive film 231A of the second substrate 22A are formed. The third substrate 23A that is included is electrically connected.
In addition, this single-sided separator 2A is a fine hole portion of the first connector 213A of the first substrate 21A and the second substrate 22A in at least one of X1 to X4 (position X1 in the above-described X1 single-sided separator 2A). A structure having 229A may be used. In this case, another double-sided or single-sided separator disposed in contact with the surface of the single-sided separator 2A and the third substrate 23A are electrically connected only at the position (X1). On the other hand, when it is desired to insulate another double-sided or single-sided separator from the third substrate 23A, either the first connector 213A of the first substrate 21A or the fine hole portion 229A of the second substrate 22A is used. The configuration is not provided. Further, at other positions (X2 to X4), when applied to the fuel cell device 5 described later, if it is necessary to connect the other double-sided or single-sided separator to the third substrate 23A, each position The first connector 213A of the first board 21A and the fine hole 229A of the second board 22A may be provided.

In the single-sided separator as described above, Xn, m single-sided separators are those in which another double-sided or single-sided separator and the third substrate 23A are electrically connected at a plurality of positions among X1 to X4. For example, what is electrically connected to the third substrate 23A at positions X1 and X2 is referred to as an X1,2 single-sided separator.
In general, since each Xn single-sided separator has the same configuration as that of the above-described X1 single-sided separator, the first connector of Xk (k is a natural number) on the first substrate is the conductivity of the third substrate. In addition to being electrically connected to the film, it is electrically insulated from the conductive film of the third substrate of Xl (l is a natural number, where l ≠ k) in the first substrate. Further, the anode-side or cathode-side surface conductive film of the second substrate is electrically insulated from the conductive film of the third substrate.
The equivalent circuit of the same type of Xn single-sided separator (n is a natural number) as described above is generally a part of the electric circuit diagram shown in FIG. 9B where the single-sided separator 2A or the single-sided separator 3A is surrounded by a dotted line. It is expressed as

Next, the operation of the separator and the fuel cell device having the above configuration will be described.
FIG. 9A is a schematic diagram showing the arrangement of separators of the fuel cell device 5 of the present embodiment, where XnXm or Xn (n and m are natural numbers of 1 to 4) are the above-described separators. Is an index representing the composition of FIG. 9 (b) is an electric circuit diagram showing electrical connection in the stacking direction of the fuel cell device 5 of the present embodiment, and FIG. 9 (c) is an equivalent circuit diagram of the fuel cell device 5 of the present embodiment. is there.
In FIG. 9 (b), straight lines indicate electrical connections such as wiring, and ● at the intersection of the straight lines indicates that these wirings are electrically connected. In addition, four straight lines extending in the left-right direction in the drawing are arranged in order from the top in descending order of potential. In the left and right ends of these straight lines, ● indicates a terminal connected to the external circuit, and ○ indicates a terminal not connected to the external circuit. In addition, the portions surrounded by dotted lines correspond to double-sided separators or single-sided separators, respectively, and between the enclosed portions correspond to membrane electrode assemblies, respectively. The circuit symbol of the battery described indicates that an electromotive force is generated in each of these parts.
The cell 6 in the figure refers to a fuel cell (cell structure) comprising a cathode-side single-sided separator 3A, an X3X3 double-sided separator 1E, and a membrane electrode assembly 6 sandwiched between them. Similarly, the cell 5 is a fuel cell comprising an X3X3 double-sided separator 1E, an X2X2 double-sided separator 1D and a membrane electrode assembly 6, and the cell 4 is comprised of an X2X2 double-sided separator 1D, X1X4 double-sided separator 1C and a membrane electrode assembly 6. The fuel cell, cell 3 is composed of X1X4 double-sided separator 1C, X3X3 double-sided separator 1B, membrane electrode assembly 6, and cell 2 is composed of X3X3 double-sided separator 1B, X2X2 double-sided separator 1A, membrane electrode assembly 6. The fuel battery cell, cell 1, is a fuel battery cell comprising an X2X2 double-sided separator 1A, an anode-side single-sided separator 2A, and a membrane electrode assembly 6.
As shown in FIG. 9 (c), in the stack structure combined as described above, the cell 6 and the cell 3, the cell 5 and the cell 2, and the cell 4 and the cell 1 are connected in parallel, respectively. Are connected in series with each other.
Therefore, the sum of two cell current values connected in parallel is the same (I = I6 + I3 + I5 + I2 + I4 + I1). In addition, two cell voltages connected in parallel have the same value (V6 = V3, V5 = V2, V4 = V1).

Further, the fuel cell device 5 in which a plurality of fuel cells are stacked as described above is configured such that even when individual fuel cells have the same output performance before stacking, these fuel cells are stacked, In the state of operating as the fuel cell device 5, the output performance tends to vary depending on each fuel cell depending on its design, operation method, and the like. In addition, the variation often depends on the stack position of each fuel cell in the stacking direction of the fuel cells. 10A and 10B show examples in which the output performance varies in the fuel cell device 5 as described above. In this case, the output performance is the voltage when the same current flows.
10 (a) and 10 (b), the vertical axis represents the stacking direction of the fuel cells, and the right side in the horizontal axis represents higher output performance. In the figure, ▲ represents the output performance of each of the cells 1 to 6 shown on the left side in the vertical axis direction. Specifically, FIG. 10A is an example in which the performance gradually increases from the cells on both ends of the cell stack 71 to the cells on the center side, and FIG. In this example, the performance gradually increases from the cell to the cells on both ends.
Here, in the fuel cell device 5 of the present embodiment described above, the two cells associated with each other by the lead line to the right side in FIG. 10 are arranged in parallel. Specifically, cell 6 and cell 3, cell 5 and cell 2, and cell 4 and cell 1 are arranged in parallel, respectively. By applying such a connection configuration to the cells 1 to 6 having output performance as shown in FIGS. 10A and 10B, a cell having high output performance and a cell having low output performance are combined with each other. Become. In this case, as shown in FIG. 27, the high-performance cell compensates for the load with respect to the low-performance cell, thereby preventing the generation of the cell reaching the power generation limit and at the same time minimizing the overall output decrease. Be able to.

As described above, according to the fuel device 5 of the embodiment of the present invention, the cathode side X3 single-sided separator 3A, the membrane electrode assembly 6, the plurality of double-sided separators 1A to 1E, and the anode-side single-sided separator 2A are appropriately combined and stacked. Then, by flowing in the anode gas and the cathode gas, two membrane electrode assemblies 6 are connected in parallel, and three groups of the membrane electrode assemblies 6 connected in parallel are connected in series. Connections including series, parallel, or both can be provided without providing wiring. Further, since the plurality of connectors provided on each substrate are formed within the shortest closed curve surrounding the plurality of fastening holes provided on the substrate, these can be achieved without increasing the shape of the conventional separator. It can be set as the structure provided with this connector.
Further, by connecting the cell structures in parallel, even when a tendency for a performance difference occurs at the stacking position of the stack, it is possible to obtain a fuel cell device 5 that is stable at high output by an action that compensates for the performance difference. it can. Further, such a fuel cell device 5 can provide a separator and a fuel cell device with few assembly processes because it is not necessary to provide external wiring when cell structures are connected in series or in parallel.

As described above, the equivalent circuit of the same type XnXm double-sided separator (n = m) is 1A, 1B, 1D, 1E of FIG. 9B, and the equivalent circuit of the different type XnXm double-sided separator (n ≠ m) is FIG. The equivalent circuit of the 1C, Xn single-side separator of b) is as shown in 2A, 3A. From this figure, it can be seen that in the fuel cell device 5 as described above, in order to generally configure the electrical connection between the membrane electrode assemblies inside, it is preferable to configure so as to satisfy the following conditions.
First, when one membrane electrode assembly and another membrane electrode assembly are connected in series, a separator that contacts the other electrode of the one membrane electrode assembly is a XiXm double-sided separator or Xi single-sided separator. In addition, a separator that contacts one electrode among the other membrane electrode assemblies is referred to as an XnXi double-sided separator or an Xi single-sided separator (hereinafter referred to as a first condition).
Second, when one membrane electrode assembly and another membrane electrode assembly are connected in parallel, a separator that contacts one electrode of the one membrane electrode assembly is an XnXi double-sided separator or an Xi single-sided separator. In addition, a separator that contacts one electrode of another membrane electrode assembly is an XmXi double-sided separator or Xi single-sided separator, and a separator that contacts another electrode of one membrane electrode assembly is an XjXm double-sided separator or Xj single-sided. A separator that contacts the other electrode of another membrane electrode assembly is an XjXn double-sided separator or an Xj single-sided separator (hereinafter referred to as a second condition).

Here, an example will be described in which another fuel cell device showing output performance variations different from those described above is configured by changing the stacking order and type of separators.
[Modification 1-1]
A specific example will be described below with reference to FIG.
As in the first embodiment, this fuel cell device is formed by stacking six cells and exhibits output performance as shown in FIG. 11 (a) during operation. In this case, as described above, a cell having a high output performance and a cell having a low output performance may be connected in parallel. An equivalent circuit in that case is shown in FIG. In the following, in order to facilitate understanding of the configuration of the separator, a description will be given with reference to FIG. 11C, which is a schematic diagram of electrical connection corresponding to the equivalent circuit diagram of FIG. FIG. 11 (d) is a schematic diagram showing the arrangement of the separators of the fuel cell device.
As shown in FIG. 11, the fuel cell device 5A includes a cathode side X1 single-sided separator 301, an X2X2 double-sided separator 101E, an X3X3 double-sided separator 101D, an X4X3 double-sided separator 101C, an X4X2 double-sided separator 101B, and an X3X1 double-sided in this order from one end side. A separator 101A and an anode-side X2 single-sided separator 201 are stacked with membrane electrode assemblies 601, 601,.

In the figure, cell 6 refers to a fuel cell (cell structure) comprising a cathode side X1 single-sided separator 301 and an X2X2 double-sided separator 101E and a membrane electrode assembly 601 sandwiched between them. Similarly, the cell 5 is a fuel cell comprising an X2X2 double-sided separator 101E, an X3X3 double-sided separator 101D and a membrane electrode assembly 601, and the cell 4 is comprised of an X3X3 double-sided separator 101D, X4X3 double-sided separator 101C and a membrane electrode assembly 601. The fuel cell, cell 3 is composed of X4X3 double-sided separator 101C, X4X2 double-sided separator 101B, membrane electrode assembly 601 and fuel cell, cell 2 is composed of X4X2 double-sided separator 101B, X3X1 double-sided separator 101A, membrane electrode assembly 601 The fuel cell, cell 1, is a fuel cell comprising an X3X1 double-sided separator 101A, an anode side X2 single-sided separator 201, and a membrane electrode assembly 601.
Here, the procedure for forming the above-described double-sided or single-sided separator is described below.
First, paying attention to an arbitrary cell, for example, the cell 6, let the single-sided separator that contacts the anode electrode of the cell 6 be the Xi single-sided separator 301 and the XjX double-sided separator. Here, i, j, k, and l are all natural numbers of 1 to 4 different from each other, and X without a subscript indicates that the connector position is undefined at the present time.
From FIG. 11 (b), the cell 6 is connected in series with the cell 5 and the cell 2, and therefore, when the above first condition is applied to each separator abutting on these cells, the membrane electrode assembly 601 is obtained. The double-sided separator 101E that contacts the anode electrode can be an XXj double-sided separator, and the double-sided separator 101B that contacts the anode electrode of the membrane electrode assembly 601 can be XXj. Furthermore, since the cell 6 is connected in parallel with the cell 1, if the second condition described above is applied to each separator that contacts the cell 1, the double-sided separator 101 </ b> A that contacts the anode electrode of the membrane electrode assembly 601. XXi double-sided separator, and the single-sided separator 201 in contact with the cathode electrode of the membrane electrode assembly 601 can be the Xj single-sided separator.
Here, for the sake of simplicity, the following description will be made using an array in which indices representing connector positions of the separator are extracted. In this case, when the above-described conditions are expressed by an array, it is determined as shown in Expression (1). When the connector position cannot be determined due to the above-mentioned conditions, it is indicated by “−”.
(I, j, j,-,-,-,-,-,-,-, i, j) (1)
Next, paying attention to the cell 5, since the cell 5 is connected in series with the cell 4 and the cell 3 and is connected in parallel with the cell 2, the arrangement is determined as shown in Equation (2) by the same procedure.
(I, j, j, k, k,-,-,-, j, k, i, j) (2)
Furthermore, paying attention to the cell 4, since the cell 4 is connected in parallel with the cell 3, the arrangement is determined by the same procedure as shown in Expression (3).
(I, j, j, k, k, l, k, l, j, k, i, j) (3)
Finally, i, j, k, and l are arbitrarily assigned so as to be different natural numbers from 1 to 4, so that the equivalent circuit diagram of the fuel cell device shown in FIG. Can be configured, for example, as shown in Equation (4). However, the combination in which natural numbers 1 to 4 are assigned to i, j, k, and l may be appropriately changed in a permutation manner.
(1,2,2,3,3,4,3,4,2,3,1,2) (4)
In the fuel cell device of this modification, since the three sets connected in parallel are connected in series by combining and connecting the separators as described above, the voltage obtained from one set connected in parallel is the same. About three times the voltage is obtained.
In addition, since the fuel cell device configured to satisfy the first and second conditions described above requires at least two connectors when two circuit configurations are connected in series, n circuit configurations It can be seen that at least n + 1 connectors are required when connecting in series. Therefore, in the case of this modification, only three sets are connected in series, so that it is understood that there are n + 1 = 4 connectors (X1 to X4).

Similarly to the modified example 1-1, in the fuel cell device which is another modified example exhibiting output performance as shown in FIGS. 12 (a) to 15 (a), the fuel cell device shown in FIGS. 12 (b) to 15 (b) It can be seen that the equivalent circuits shown in FIG. 12 may be configured, and the separator configurations shown in FIGS. 12 (c) to 15 (c) may be used.
Specifically, in the fuel cell device shown in FIG. 12, the cooling layer, cathode side X1 single-sided separator 302, X2X2 double-sided separator 102L, X3X3 double-sided separator 102K, X7X1 double-sided separator 102J, X2X2 double-sided Separator 102I, X3X3 double sided separator 102H, X7 single sided separator 102G, cooling layer, X4 single sided separator 102F, X5X5 double sided separator 102E, X6X6 double sided separator 102D, X7X4 double sided separator 102C, X5X5 double sided separator 102B, X6X6 double sided separator 102A, anode side X7 single sided The separator 202 and the cooling layer are laminated with the membrane electrode assemblies 602, 602,... Sandwiched between the separators. In the stack structure combined in this way, cell 12 (cell structure) and cell 9, cell 11 and cell 8, cell 10 and cell 7, cell 6 and cell 3, cell 5 and cell 2, cell 4 and cell 1 Are connected in parallel, and these six parallel connections are connected in series.

  The fuel cell device shown in FIG. 13 has a cooling layer, a cathode side X1 single-sided separator 303, an X2X2 double-sided separator 103L, an X3X3 double-sided separator 103K, an X4X4 double-sided separator 103J, an X5X5 double-sided separator 103I, and an X6X6 double-sided in order from one end side. Separator 103H, X7 single sided separator 103G, cooling layer, X4 single sided separator 103F, X5X5 double sided separator 103E, X6X6 double sided separator 103D, X7X1 double sided separator 103C, X2X2 double sided separator 103B, X3X3 double sided separator 103A, anode side X4 single sided separator 203, cooling layer However, the membrane electrode assemblies 603, 603,... Are sandwiched between the separators. In the stack structure combined in this way, cell 9 (cell structure) and cell 6, cell 8 and cell 5, cell 7 and cell 4, cell 12 and cell 3, cell 11 and cell 2, cell 10 and cell 1 Are connected in parallel, and these six parallel connections are connected in series.

  The fuel cell device shown in FIG. 14 has a cathode side X1 single-sided separator 304, an X2X1 double-sided separator 104E, an X2X1 double-sided separator 104D, an X2X2 double-sided separator 104C, an X3X2 double-sided separator 104B, an X3X2 double-sided separator 104A, sequentially from one end side thereof. An anode side X3 single-sided separator 204 is laminated with membrane electrode assemblies 604, 604,... Sandwiched between the separators. In the stack structure combined in this way, cell 4 (cell structure) and cell 5 and cell 6, cell 1 and cell 2 and cell 3 are connected in parallel, and these two parallel connections are connected in series with each other. Yes.

  In the fuel cell device shown in FIG. 15, the cathode side X1 single-sided separator 305, the X2X2 double-sided separator 105C, the X3X2 double-sided separator 105B, the X3X3 double-sided separator 105A, and the anode-side X4 single-sided separator 204 are joined between the separators in order from the surface. It is laminated with the bodies 605, 605,. In the stack structure combined in this way, the cell 2 (cell structure) and the cell 3 are connected in parallel, and the parallel connection, the cell 1 and the cell 4 are connected in series with each other.

[Modification 1-2]
16 is an arrow view when the X2X2 double-sided separator 1F formed by stacking four insulating substrates 11F, 12F, 16F, and 15F is cut in parallel with the thickness direction along the IVb-IVb cutting line of FIG. It is sectional drawing.
The double-sided separator 1F of this modification includes only one internal conductive film 131F similar to the internal conductive film 131A in the X2X2 double-sided separator 1A composed of the five insulating substrates 11A to 15A described above. The internal conductive film similar to the internal conductive film 132A is not provided. When compared with the double-sided separator 1A of the first embodiment described above, the double-sided separator 1F of the modified example 1-2 insulates the third substrate 13A and the fourth substrate 14A of the double-sided separator 1A from one sheet. In addition to the conductive substrate 16F, one of the internal conductive films 131A and 132A of the double-sided separator 1A and either the third connector 139A or the fourth connector 130A formed on the same surface as the internal conductive film is omitted. It is what has been. In FIG. 16, in the insulating substrates 11F, 12F, and 15F, the same numerals are used for the same components as the double-sided separator 1A, and the letter F is appended at the end. In this case, the X2 first connector 113F and the X2 third connector 139F, the anode-side surface conductive film 127F, and the cathode-side surface conductive film 147F are electrically connected to each other via the internal conductive film 131F and the via wiring. Connected.
In this modification, the position Xn where the first connector 113F and the internal conductive film 131F are connected and the position Xm where the second connector 139F and the internal conductive film 131F are connected are always the same in terms of structure. Therefore, the double-sided separator 1F of the present modification is the same type of XnXm double-sided separator (where n and m are natural numbers 1 to 4 where n = m).

[Modification 1-3]
FIG. 17 is a cross-sectional view taken along line X2X2 double-sided separator 1G formed by laminating three insulating substrates 11G, 17G, and 15G along the IVb-IVb cutting line of FIG. It is.
The X2X2 double-sided separator 1G of this modified example is a modified example in which the internal conductive film is not provided. When compared with the double-sided separator 1A of the first embodiment described above, the double-sided separator 1G of Modification 1-3 is the second substrate 12A, the third substrate 13A, and the fourth substrate of the double-sided separator 1A. 14A is a single insulating substrate 17G, and the inner conductive layers 131A and 132A, the third connector 139A, and the fourth connector 130A of the double-sided separator 1A are all omitted. In FIG. 17, in the insulating substrates 11G and 15G, the same numerals are used for the same components as the double-sided separator 1A, and the letter G is appended at the end.
Specifically, on the surface of the insulating substrate 17G, the surface conductive film 127G is formed to extend to a position facing the first connector 113G of X2, and the surface conductive film 127G at this facing position is formed as the third connector. When the X2 first connector 113G and the X2 third connector 139G are in contact with each other, the surface conductive film 127G and the X2 first connector 113G are electrically connected.
Similarly, on the back surface of the insulating substrate 17G, the surface conductive film 147G is formed to extend to a position facing the second connector 153G of X2, and the surface conductive film 147G at this facing position is formed by the fourth connector 130G. When the second connector 153G of X2 and the fourth connector 130G of X2 are in contact with each other, the surface conductive film 147G and the second connector 153G of X2 are electrically connected.
With the above-described configuration, the X2 first connector 113G and the X2 second connector 153G and the surface conductive films 127G and 147G are electrically connected to each other via via wiring.
In this modification, n = m at a position Xn where the first connector 113G and the surface conductive film 127G are connected and a position Xm where the second connector 153G and the surface conductive film 147G are connected. When this double-sided separator is configured, it corresponds to the same type of XnXm double-sided separator (n = m), and when this double-sided separator is configured so that n ≠ m, an unusual XnXm double-sided separator ( n ≠ m).

[Modification 1-4]
18 (a) shows a case where an X2, 4X2, 4 double-sided separator 1H formed by stacking five insulating substrates 11H to 15H is cut parallel to the thickness direction along the IVb-IVb cutting line of FIG. 18B is a cross-sectional view taken along the X2, 4X2, and 4 double-sided separator 1H along the IVc-IVc cutting line of FIG. 3 in parallel with the thickness direction. In this modification, the third connector 139H and the fourth connector 130H at the positions X2 and X4 are both connected to the anode-side internal conductive film 131H and the cathode-side internal conductive film 132H. Thereby, the anode side surface conductive film 127H and the cathode side surface conductive film 147H are connected in series via the internal conductive films 131H and 132H. Further, in FIG. 18, in the five insulating substrates 11H to 15H, the same numerals are used for the same components as the first to fifth substrates 15H of the double-sided separator 1A described above, and the letter H is appended at the end. is doing. Here, in the above-mentioned notation “X2, 4X2, and 4 double-sided separator”, a comma-separated subscript added to X (here, 2 and 4) indicates that the internal conductive layer 131A of the double-sided separator 1H is the third connector. This represents that the internal conductive layer 132 </ b> A is electrically connected to the fourth connector at the positions 2 and 4.
The internal conductive film 131H is connected to the third connector 139H and the fourth connector 130H at two or more positions, and the internal conductive film 132H, the third connector 139H and the fourth connector 130H are connected to these two or more. The anode side surface conductive film 127 </ b> H and the cathode side surface conductive film 147 </ b> H can be connected in parallel by connecting at different positions.
Further, the position at which the internal conductive films 131H and 132H are connected to the third connector 139H or the fourth connector 130H is not limited to the above combination, and may be changed as appropriate.
In this modification, since the electric circuit is configured through a plurality of via wirings, the electric resistance can be reduced, and as a result, the power generation efficiency of the fuel cell device can be increased.

[Modification 1-5]
FIG. 19 (a) is a cross-sectional view taken along line Xb single-sided separator 1J formed by laminating two insulating substrates 11J and 12J along the IVb-IVb cutting line in FIG. FIG. 19B is a cross-sectional view taken along the arrow when the X2 single-sided separator 1J is cut parallel to the thickness direction along the IVc-IVc cutting line of FIG. The single-sided separator 1J shown in FIG. 19 connects the first connector 113J and the surface conductive film 127J by forming the surface conductive film 127J extending to the connector forming position as in the modification of FIG. The third substrate 13A to the fifth substrate 15A of the double-sided separator 1A described above are excluded. The surface conductive film 127J of this modification is connected to the first connector 113J at the position X2, but is not connected to the first connectors 113J, 113J,... At the other positions X1, X3, and X4.
The second connectors 153J, 153J,... Are exposed on the back surface of the single-sided separator 1J, that is, the surface on which the surface conductive film 127J is not formed, and these second connectors 153J, 153J,. Are connected to the first connectors 113J, 113J,... By via wiring formed in the single-sided separator 1J and the third connectors 139J, 139J,.
By combining two single-sided separators as described above (for example, an X2 single-sided separator and an X3 single-sided separator), adjacent membrane electrode assemblies are connected in series or in parallel as in the case of the double-sided separator described so far. Can be made to function. In this case, the fourth connector of the X2 single-sided separator and the fourth connector of the X3 single-sided separator are arranged so as to face each other, and the fourth connectors provided at positions corresponding to each other are brought into contact with each other and connected, Establish electrical connection between adjacent single-sided separators.
As described above, one single-sided separator is turned upside down so that the third connector included in the single-sided separator and the third connector of the other single-sided separator are opposed to and in contact with each other, It is necessary to provide an electrical connection. At this time, the third connector formed on the back surface of the single-sided separator is provided symmetrically with respect to a line segment connecting the midpoints of two opposing sides of the rectangular or square single-sided separator on the back surface. With this configuration, the single-sided separators configured as described above can be brought into contact with the third connectors regardless of the combination.
In the case of this modification, when two single-sided separators are arranged so that the fourth connectors are in contact with each other, the surface conductive film and the first connector are connected at the same position in each single-sided separator (for example, The combination of the above-mentioned X2 single-sided separator and X3 single-sided separator) and adjacent membrane electrode assemblies are connected in series by these single-sided separators. Similarly, when the surface conductive film and the first connector are connected at different positions in each single-sided separator (for example, a combination of the above-described X2 single-sided separator and X4 single-sided separator), adjacent membrane electrode assemblies are Are connected in parallel by a single-sided separator.
Needless to say, in any of the above-described modifications, the same effects as those of the first embodiment can be obtained.

[Second Embodiment]
In the first embodiment, as shown in FIG. 2, an anode side current collecting plate 72 and an end plate 76 are provided on the surface of the cathode side X4 single sided separator 3A, and a cathode side current collecting plate is provided on the back side of the anode side X1 single sided separator 2A. 73 and the end plate 77 are provided, but in the second embodiment, the cathode side X4 single-sided separator 3K has the anode side current collector plate and the end plate integrally formed on the surface of the third substrate 33K. A sixth substrate 36K is provided (see FIG. 20), and the anode-side X1 single-sided separator 2K includes a seventh substrate 27K in which a cathode-side current collector plate and an end plate are integrally formed on the back surface of the third substrate 23K. (See FIG. 21).
In the cathode side X4 single-sided separator 3K and the anode side X1 single-sided separator 2K, the same components as the cathode side X4 single-sided separator 3A and anode side X1 single-sided separator 2A in the first embodiment have the same numerals and roman letters K. The description is omitted.

FIG. 20A shows a fifth substrate 35K constituting the cathode side X4 single-sided separator 3K, (b) and (c) a fourth substrate 34K, (d) a third substrate 33K, and (e) A sixth substrate 36K is shown, and (a) to (d) are cross-sectional views taken along the cutting lines aa to d-d in FIG. 5 similar to FIG. Although not shown in the drawing, a plane cross-sectional view when cut in the same manner, (f) is a cross-sectional view taken along the cutting line ff in (e).
FIG. 21A shows the first substrate 21K constituting the anode side X1 single-sided separator 2K, (b) and (c) show the second substrate 22K, (d) show the third substrate 23K, (e ) Shows the seventh substrate 27K, and (a) to (d) are plan sectional views taken along the cutting lines aa to dd in FIG. 5 similar to FIG. ) Is not shown, but is a cross-sectional plan view when cut in the same manner, and (f) is a cross-sectional view taken along the cutting line ff in (e).

  As shown in FIG. 20, the cathode side X4 single-sided separator 3K includes a third substrate 33K, a fourth substrate 34K, and a fifth substrate 35K, like the cathode side X4 single-sided separator 3A of the first embodiment. Furthermore, an insulating sixth substrate 36K is stacked on the surface of the third substrate 33K. The sixth substrate 36K has gas couplings 361K, 361K,... Communicating with the anode gas introduction hole 333K, the anode gas discharge hole 334K, the cathode gas introduction hole 335K, and the cathode gas discharge hole 336K of the third substrate 33K on the surface. Protrusively provided. Further, eight bolt fastening holes 362K, 362K,... Are formed at predetermined locations. Further, a rectangular notch 363K exposing the conductive film 331K of the third substrate 33K is formed on the left side edge in the short direction of the sixth substrate 36K, and the conductive film 331K and the notch 363K are formed in the notch 363K. An electrical external extraction portion (external terminal) 364K that conducts is provided so as to protrude from the surface of the sixth substrate 36K. The electrical external take-out part 364K is connected to, for example, a terminal on the anode side in the fuel cell device 5 described above. Here, portions of the conductive film 331K of the third substrate 33K corresponding to the plurality of first connectors 313K, 313K,... Provided on the fifth substrate 35K are designated as second connectors (second connection terminals). 353K, 353K, and so on.

  On the other hand, as shown in FIG. 21, the anode-side X1 single-sided separator 2K is similar to the anode-side X1 single-sided separator 2A of the first embodiment in the first substrate 21K, the second substrate 22K, and the third substrate 23K. And a seventh substrate 27K is laminated on the back surface of the third substrate 23K. Eight bolt fastening holes 271K, 271K,... Are formed at predetermined positions on the seventh substrate 27K. Further, a cutout portion 272K that exposes the conductive film 231K of the third substrate 23K is formed on the left side edge in the short direction of the seventh substrate 27K, and the conductive portion 231K is electrically connected to the cutout portion 272K. An external take-out portion 273K is provided so as to protrude from the back surface of the seventh substrate 27K. The electrical external take-out part (external terminal) 273K is connected to the cathode-side terminal in the fuel cell device 5 described above, for example. Here, portions of the conductive film 231K of the third substrate 23K corresponding to the plurality of first connectors 213K, 213K,... Provided on the first substrate 21K are designated as second connectors (second connection terminals). 253K, 253K, and so on.

  Then, the cathode side X4 single-sided separator 3K shown in FIG. 20 is used instead of the cathode side X4 single-sided separator 3A in the first embodiment, and the anode side X1 single-sided separator 2K shown in FIG. It may be used instead of the anode side X1 single-sided separator 2K in the embodiment. By using the cathode side X4 single-sided separator 3K and the anode side X1 single-sided separator 2K that have both the current collecting function and the separator function, there is no need to provide a separate current collecting plate on the single-sided separator. The fuel cell device can be reduced in size.

  Needless to say, the X4 single-sided separator 3K and the X1 single-sided separator 2K provided with the sixth substrate 36K and the seventh substrate 27K as described above can be applied to a generally expressed Xn single-sided separator. Further, by using each single-sided separator according to the second embodiment in combination with each double-sided separator according to the first embodiment, the same effect as in the first embodiment can be obtained. It is done.

[Third embodiment]
22 to 25 show configuration examples of the fuel cell device 5L of the third embodiment. In the fuel cell device 5L of the third embodiment, both the high-voltage side and low-voltage side electrical outlets are provided at the anode side end of the fuel cell device 5L.
22 is a cross-sectional view taken along the arrow when the fuel cell device 5L is cut in parallel with the thickness direction along the cutting line XXIVb-XXIVb in FIG. The fuel cell device 5L according to the third embodiment is compared with the fuel cell device 5 according to the first embodiment shown in FIG. Since only the configuration of the cathode current collector plate 72L is different and the other configurations are the same, in FIG. 22, the same reference numerals as those of the fuel cell device 5 described above are given.
As shown in FIG. 22, the anode side current collecting plate 72L of the fuel cell device 5L is provided with both high voltage side and low voltage side external terminals. On the other hand, the cathode-side current collector 73L does not include an external terminal. In the third embodiment, the cathode side current collecting plate 73L may be omitted.
FIG. 23 (a) is a schematic diagram showing the arrangement of the separators of the fuel cell device 5L of the third embodiment, and XnXm or Xn (n and m are natural numbers of 1 to 4) in the figure are as described above. As in the first embodiment, the index represents the configuration of the separator. FIG. 23 (b) is an electric circuit diagram showing electrical connection in the stacking direction of the fuel cell device 5L, and FIG. 23 (c) is an equivalent circuit diagram of the fuel cell device 5L.
As shown in FIG. 23 (a), the fuel cell device 5L includes a cathode side X4 single-sided separator 3L, an X3X3 double-sided separator 106E, an X2X2 double-sided separator 106D, an X1X4 double-sided separator 106C, and an X3X3 double-sided separator 106B in this order from one end side. , X2X2 double-sided separator 106A and anode-side X1 single-sided separator 2L have a stack structure in which membrane electrode assemblies 606, 606,. In addition, all the separators included in the fuel cell device 5L of the third embodiment have the same arrangement as that of the above-described first embodiment, but as described later, X1 single-sided surfaces respectively disposed at the end portions. The connection between the terminal and the internal conductive film inside the separator 2L and the X4 single-sided separator 3L is different.

  As shown in FIG. 23 (b), in the stack structure combined as described above, the cell 6 (cell structure), the cell 3, and the cell 5 are similar to the fuel cell device 5 in the first embodiment described above. And cell 2, cell 4 and cell 1 are connected in parallel, and these three parallel connections are connected in series. In the third embodiment, external terminals on both the high voltage side and the low voltage side can be provided at the cathode side end. In this case, the second connection terminal at the position X1 in FIG. 23 is an external terminal on the low voltage side, and the second connection terminal and the internal conductive layer at the position X4 are connection terminals on the high voltage side. These connection terminals are connected to external terminals provided at the end portions exposed on the outer surface of the anode current collector plate through internal wirings provided on the anode current collector plate 72L, respectively. Is connected to the terminal for taking in the voltage of the fuel cell system, whereby electric power is supplied to the fuel cell system.

FIG. 24 (a) is an X1 single-sided separator 2L disposed at the anode side end of the third embodiment, and FIG. 24 (b) is a cross section taken along the line XXIVb-XXIVb in FIG. 24 (a). FIG. 24 (c) shows a cross section taken along the line XXIVc-XXIVc of FIG. 24 (a). FIG. 25 (a) is a plan view of the cathode-side single-sided separator 3L in the third embodiment, FIG. 25 (b) is a cross section taken along the line XXVb-XXVb in FIG. 25 (a), and FIG. (c) shows the cross section along the XXVc-XXVc cutting line of FIG. Note that an insulating substrate is disposed on the cathode end side instead of the cathode current collector 73L, and the X1 single-sided separator 2L is electrically connected only to the X1X1 double-sided separator 106A as described later. .
As shown in FIGS. 24A to 24C, the anode-side X1 single-sided separator 2L has the second connector 253L at the position X1 connected to the first connector 213L at the position X1, and the internal conductive film. 231L. The first connectors 213L, 213L, and 213L at the positions X2, X3, and X4 and the second connectors 253L, 253L, and 253L are not connected to each other and are also insulated from the internal conductive film 231L. Note that the X1 single-side separator 2L on the anode side shown in FIG. 24 is not limited to the above-described configuration, and the second connectors 253L, 253L, and 253L at the positions X2, X3, and X4 are the first connectors 213L, As long as 213L and 213L are insulated from each other, any structure connected to the internal conductive film 231L may be used. In this case, the configuration is the same as that of the anode-side X1 single-sided separator 2A in the first embodiment described above. Furthermore, the configuration may be such that none of the second connection terminals at the positions X2, X3, and X4 is provided.

As shown in FIG. 25, in the X4 single-sided separator 3L on the cathode side, the second connector 353L at the position X4 is connected to the first connector 313L at the position X4, and is also connected to the internal conductive film 331L. The second connectors 353L, 353L, and 353L at the position X1 are connected to the first connector 313L at the position X1, but are insulated from the internal conductive film 331L. Further, the first connector 313L and the second connector 353L at the position X2 are not connected to each other and are also insulated from the internal conductive layer 00. Similarly, the first connector 313L and the second connector 353L at the position X3 are not connected to each other and are also insulated from the internal conductive layer 00. In addition, in the X4 single-sided separator 3L on the anode side shown in FIG. 25, the second connectors 353L, 353L, and 353L at the positions X2 and X3 are insulated from the first connectors 313L, 313L, and 313L. Any configuration may be used as long as it is connected to the internal conductive layer 00. Furthermore, it is good also as a structure which is not equipped with any of the 2nd connector of the above-mentioned position X2 and X3.
As described above, by adopting the configuration of the fuel cell device 5L in the third embodiment, in addition to the effects of the first and second embodiments described above, extraction of electricity on the high-voltage side and the low-voltage side Both ports can be provided on one end side in the stacking direction of the fuel cell device 5L. Thereby, the routing wiring outside the fuel cell device 5L can be omitted, and the fuel cell system including such a fuel cell device 5L can be further downsized.
Further, by using each single-sided separator according to the third embodiment in combination with each double-sided separator according to the first embodiment, the same effect as in the first embodiment can be obtained. It is done.
In addition, although all the separators described in the above-described embodiments and modifications are configured to include at least a plurality of insulating substrates, this is not a limitation, and all of these separators include only one insulating substrate. It is good also as a structure provided.

3 is a block diagram of a power generation device 400 including a fuel cell device 5. FIG. FIG. 4 is a cross-sectional view taken along the arrow when the fuel cell device 5 is cut in parallel with the thickness direction along the cutting line IVb-IVb in FIG. 3. It is a top view of 1 A of double-sided separators in FIG. (a) is an enlarged sectional view of the membrane electrode assembly 6 in FIG. 2 cut along the cutting line IVb-IVb in parallel with the thickness direction, and (b) and (c) are double-sided separators in FIG. It is an expanded sectional view when 1A is cut | disconnected in parallel with thickness direction along cutting line IVb-IVb and IVc-IVc. (a), (b) is an expanded sectional view at the time of cut | disconnecting the single-sided separator 2A in FIG. 2 in parallel with thickness direction along cutting line IVb-IVb and IVc-IVc, respectively. (a)-(i) is a plane sectional view of double-sided separator 1A at the time of cut | disconnecting along the cutting lines aa-ii of FIG. (a)-(i) is a plane sectional view of double-sided separator 1C at the time of cut | disconnecting along the cutting lines aa-ii of FIG. (a)-(d) is a plane sectional view of 2 A of single-sided separators at the time of cut | disconnecting along the cutting lines aa-dd of FIG. (a) is a schematic diagram showing the arrangement of separators of the fuel cell device 5, (b) is an electric circuit diagram showing electrical connection in the stacking direction of the fuel cell device 5, and (c) is a diagram of the fuel cell device 5. FIG. 5 is a diagram showing an example of output performance in the fuel cell device 5. FIG. (a) is a diagram showing an example of output performance in the modification, (b) is an equivalent circuit diagram of the fuel cell device in (a), (c) is a stacking direction of the fuel cell device in (a) An electrical circuit diagram showing electrical connection, (d) is a schematic diagram showing an array of separators of the fuel cell device in (a). (a) is a diagram showing an example of output performance in the modification, (b) is an equivalent circuit diagram of the fuel cell device in (a), (c) is an array of separators of the fuel cell device in (a) It is the schematic diagram which showed. (a) is a diagram showing an example of output performance in the modification, (b) is an equivalent circuit diagram of the fuel cell device in (a), (c) is an array of separators of the fuel cell device in (a) It is the schematic diagram which showed. (a) is a diagram showing an example of output performance in the modification, (b) is an equivalent circuit diagram of the fuel cell device in (a), (c) is an array of separators of the fuel cell device in (a) It is the schematic diagram which showed. (a) is a diagram showing an example of output performance in the modification, (b) is an equivalent circuit diagram of the fuel cell device in (a), (c) is an array of separators of the fuel cell device in (a) It is the schematic diagram which showed. It is arrow sectional drawing at the time of cut | disconnecting double-sided separator 1F in parallel with thickness direction along the cutting line IVb-IVb of FIG. It is arrow sectional drawing at the time of cut | disconnecting double-sided separator 1G in parallel with thickness direction along the cutting line IVb-IVb of FIG. (a) is a cross-sectional view when the double-sided separator 1H is cut parallel to the thickness direction along the cutting line IVb-IVb in FIG. 3, and (b) is a thickness along the cutting line IVc-IVc. It is arrow sectional drawing at the time of cut | disconnecting in parallel with a direction. (a) is a cross-sectional view when the single-sided separator 1J is cut parallel to the thickness direction along the cutting line IVb-IVb in FIG. 3, and (b) is a thickness along the cutting line IVc-IVc. It is arrow sectional drawing at the time of cut | disconnecting in parallel with a direction. (a)-(d) is a cross-sectional view of the cathode side single-sided separator 3K when cut along the cutting lines aa-d-d in FIG. 5, and (e) is a cross-sectional view of the sixth substrate 36K. FIG. 4F is a cross-sectional view taken along the arrow line f-f in FIG. (a)-(d) is a plane sectional view of the anode side single-sided separator 2K when cut along the cutting lines aa-d-d in FIG. 5, and (e) is a plane section of the seventh substrate 27K. FIG. 4F is a cross-sectional view taken along the arrow line f-f in FIG. It is arrow sectional drawing at the time of cutting 5 L of fuel cell apparatuses in parallel with the thickness direction along the cutting line XXIVb-XXIVb of FIG. (a) is a schematic diagram showing the arrangement of separators of the fuel cell device 5L in the third embodiment, (b) is an electric circuit diagram showing electrical connections in the stacking direction of the fuel cell device 5L, (c) ) Is an equivalent circuit diagram of the fuel cell device 5L. (a) is a plan view of the anode-side single-sided separator 2L in the third embodiment, (b) is a sectional view taken along line XXIVb-XXIVb in (a), and (c) is a sectional view taken along line XXIVc-XXIVc in (a). It is. (a) is a plan view of the cathode-side single-sided separator 3L in the third embodiment, (b) is a cross-sectional view of XXVb-XXVb of (a), and (c) is a cross-sectional view of XXVc-XXVc of (a). It is. It is the graph showing the current-voltage characteristic by the performance difference of the cell in the case of carrying out the conventional serial connection. It is the graph showing the current-voltage characteristic by the performance difference of the cell at the time of connecting in parallel.

Explanation of symbols

1A, 1B, 1C, 1D, 1E Double-sided separators 11A, 11C First substrate (insulating substrate)
112A, 128A, 137A, 148A, 152A Bolt fastening hole (hole)
113A, 113C first connector (first connection terminal)
12A, 12C Second substrate (insulating substrate)
121A, 121C Serpentine groove (gas flow path)
127A, 127C Anode-side surface conductive film (first conductive layer)
13A, 13C Third substrate (insulating substrate)
130A, 130C Fourth connector (fourth connection terminal)
131A, 131C Anode side internal conductive film (third conductive layer)
132A, 132C Cathode side internal conductive film (fourth conductive layer)
139A, 139C Third connector (third connection terminal)
14A, 14C Fourth substrate (insulating substrate)
141A, 141C Serpentine groove (gas flow path)
147A, 147C Cathode side surface conductive film (second conductive layer)
15A, 15C Fifth substrate (insulating substrate)
153A, 153C Second connector (second connection terminal)
2A, 2K, 2L Anode-side single-sided separator 21A, 21K, 21L First substrate (insulating substrate)
212A, 228A, 237A Bolt fastening hole (hole)
212K, 228K, 238K, 271K Bolt fastening hole (hole)
213A, 213K, 213L First connector (first connection terminal)
22A, 22K, 22L Second substrate (insulating substrate)
221A, 221K, 221L Serpentine groove (gas flow path)
227A, 227K, 227L, 327L Surface conductive film (first conductive layer)
23A, 23K, 23L Third substrate (insulating substrate)
231A, 231K, 231L Back side conductive film (second conductive layer)
237L Bolt fastening hole (hole)
253A, 253K, 253L Second connector (second connection terminal)
27K Seventh substrate (insulating substrate)
272K Notch 273K Electrical external extraction part (external terminal)
3K, 3L Cathode side single separator 313K, 313L First connector (first connection terminal)
33K, 33L Third substrate (insulating substrate)
332K, 331L Backside conductive film (second conductive layer)
337L Bolt fastening hole (hole)
34K Fourth substrate (insulating substrate)
341K, 341L Serpentine groove (gas flow path)
347K, 327L Surface conductive film (first conductive layer)
35K Fifth substrate (insulating substrate)
352K, 348K, 338K, 362K Bolt fastening hole (hole)
353K, 353L Second connector (second connection terminal)
36K Sixth substrate (insulating layer)
363K Notch 364K Electrical external extraction part (external terminal)
5,5L fuel cell device 6,601,602,603,604,605,606 membrane electrode assembly 61 solid polymer electrolyte membrane (electrolyte membrane)

Claims (11)

A separator comprising one or more insulating substrates,
A gas flow path through which gas flows on one surface of the separator, a first conductive layer having conductivity, and a plurality of first connection terminals are formed,
At least one of the plurality of first connection terminals and the first conductive layer are connected,
At least one other of the plurality of first connection terminals and the first conductive layer are insulated,
A separator having a plurality of second connection terminals respectively corresponding to any one of the plurality of first connection terminals formed on the other surface of the separator. Other separators used in combination with one separator according to claim 1,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A separator, wherein a plurality of second connection terminals of other separators respectively corresponding to any one of the plurality of first connection terminals of the other separators are formed on the other surface of the other separators. A separator comprising one or more insulating substrates,
A gas flow path through which gas flows on one surface of the separator, a first conductive layer having conductivity, and a plurality of first connection terminals are formed,
At least one of the plurality of first connection terminals and the first conductive layer are connected,
At least one other of the plurality of first connection terminals and the first conductive layer are insulated,
A gas flow path through which gas flows on the other surface of the separator, a second conductive layer having conductivity, and a plurality of second connection terminals are formed,
At least one of the plurality of second connection terminals and the second conductive layer are connected,
At least one other of the plurality of second connection terminals and the second conductive layer are insulated,
Any one of the plurality of first connection terminals and any one of the plurality of second connection terminals are connected. Other separators used in combination with one separator according to claim 3,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A separator, wherein a second conductive layer of another separator connected to the first conductive layer of the other separator is formed on the other surface of the other separator. Other separators used in combination with one separator according to claim 3,
Including one or more other insulating substrates;
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A separator, wherein an external connection terminal connected to the first conductive layer of the other separator is provided on the other surface of the other separator. It is another separator used in combination with one separator according to claim 3, comprising one or more other insulating substrates,
A gas flow path of another separator through which gas flows on one surface of the other separator, a first conductive layer of another separator having conductivity, and a plurality of first connection terminals of the other separator are formed. ,
At least one of the plurality of first connection terminals of the other separator and the first conductive layer of the other separator are connected,
At least one of the plurality of first connection terminals of the other separator is insulated from the first conductive layer of the other separator,
A plurality of second connection terminals of other separators are provided on the other surface of the other separator, and at least one of the second connection terminals of the other separators is connected to the first connection terminals of the other separators. Connected to the first conductive layer of the other separator,
At least one other second connection terminal of the other separator is connected to the first connection terminal of the other separator and insulated from the first conductive layer of the other separator. The separator according to claim 3,
It has a plurality of holes through which bolts are inserted,
The plurality of first connection terminals are provided between the plurality of holes.   A fuel cell device comprising the separator according to claim 3. One separator according to claim 3, another separator according to claim 4, and a membrane electrode assembly in which at least one electrode is provided on each side of the electrolyte membrane,
One surface of the one separator and one surface of the other separator are arranged to face each other, and the membrane electrode assembly is disposed between one surface of the other separator and one surface of the one separator. A fuel cell device comprising a sandwiched cell structure. A plurality of the separators according to claim 3, and a membrane electrode assembly in which at least one electrode is provided on each side of the electrolyte membrane,
One surface of one of the plurality of one separators and the other surface of the other one of the plurality of one separators are arranged to face each other, and the membrane electrode assembly is the plurality of the plurality of separators. A fuel cell device comprising a cell structure sandwiched between one surface of one separator and the other surface of the other one of the plurality of separators.   An electronic apparatus comprising the fuel cell device according to any one of claims 8 to 10.

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