JP4453423B2 - Fuel cell wiring - Google Patents

Description

  The present invention relates to a fuel cell wiring.

  The fuel cell has a configuration in which a pair of electrodes provided with an electrolyte membrane interposed therebetween is set as one set, and a separator is inserted between each set. In other words, it can be said that a plurality of single cells each composed of an electrolyte membrane and a pair of electrodes are connected in series. Therefore, when an abnormality such as a drop in output voltage occurs in the fuel cell, the voltage between each set of separators or the potential of each separator is measured one by one in order to investigate where the abnormality has occurred. There is a need to continue to.

  Conventionally, such measurement has been performed by the following method, for example. That is, first, a hole is formed on the side surface of the separator. And a terminal with an electric wire is inserted in this hole, and it fixes with an adhesive agent etc. Then, the voltage between a pair of adjacent separators or the potential of each separator is measured at the end of each electric wire.

  In such a measuring method, since a plurality of electric wires are disturbed, there is a problem that workability is poor and the order of the electric wires is easily mistaken. There is also a problem that a large space is taken up by a plurality of electric wires. Furthermore, as the thickness of the separator is reduced, it is difficult to form a hole on the side surface of the separator.

As a related technique, there is one disclosed in Patent Document 1.
International Publication Number WO02 / 001659

  An object of the present invention is to enable easy connection of wiring to each separator in a fuel cell.

  The present invention employs the following means in order to solve the above problems.

That is, the fuel cell wiring of the present invention is
In the planar fuel cell wiring having flexibility ,
A conductive member provided on a flexible insulating substrate;
An electrode portion that contacts the separator of the fuel cell and electrically connects the separator and the conductive member;
A pressing member that is provided on a surface opposite to the contact side of the electrode portion with the separator and presses the electrode portion;
In the region outside the sealed region formed by the gasket provided between the pair of separators, the electrode portion abuts against one separator, and the electrode member is pressed against the one separator by the pressing member. Fuel cell wiring,
A plurality of the conductive members are disposed with respect to the insulating substrate, and the electrode portions are provided at the ends of the conductive members,
While the distance in the longitudinal direction between the electrode portions is set to correspond to the gap between the separators,
The insulating substrate is disposed so as to face the side surface side of the separator provided in a multilayer shape, and the tip of each conductive member is bent together with the insulating substrate and inserted into a gap between different separators. It is characterized by that.

According to the structure of this invention, an electrode part is electrically connected to a separator only by inserting the part in which the electrode part in the wiring for fuel cells was provided between a pair of separators. Moreover, since an electrode part is pressed toward a separator by a pressing member, while making electrical connection more reliable, it can suppress that the part in which the electrode part was provided falls out between a pair of separators. In addition, since the fuel cell wiring is a flat surface having flexibility, the fuel cell wiring can be easily arranged at a free position. Furthermore, since the electrode portion is connected to the separator in a region outside the sealed region formed by the gasket, adverse effects on the sealing performance can be suppressed. The pressing member may be fixed to the surface of the electrode portion opposite to the contact side with the separator, or may be separate from the main body of the fuel cell wiring. And according to the structure of this invention, it becomes possible to connect an electrode part to the separator of several places with one wiring for fuel cells, and the wiring for fuel cells can be installed, without taking up much space. In general, it is often difficult to increase the dimensional accuracy of the gap between the separators in the fuel cell. However, according to the configuration of the present invention, the fuel cell wiring itself is flexible, and fine adjustment of the bent portions of the conductive member and the insulating member makes it possible to appropriately fit each gap even if the dimensional accuracy is not high. The tip of each conductive member (including the insulating substrate) can be inserted. In addition, a multilayer separator means that a plurality of separators are arranged, and does not necessarily mean that the separators are stacked in the vertical direction. Therefore, the separator is
The case where it is arranged in the horizontal direction is also included. The same applies hereinafter.

  The pressing force by the pressing member may be set to be smaller than the elastic repulsive force by the gasket.

  According to this structure, since the fall of the adhesive force to the separator by a gasket can be suppressed, the bad influence on sealing performance can be suppressed further.

  In addition, it is preferable that a reinforcing member is provided in a region including at least a part of the bent portion of the insulating substrate so that the insulating substrate can be easily bent and the strength of the insulating substrate is reinforced.

  In this way, when the insulating substrate is bent, a bending wrinkle is attached, so that the work for inserting the fuel cell wiring into the gap between the separators becomes easy. Moreover, it can suppress that a crack etc. generate | occur | produce in the bent part of an insulated substrate.

  Moreover, it is good for the front-end | tip part of the said press member to provide the inclined surface which assists introduction into the clearance gap between a pair of separators.

  If it does in this way, since introduction at the time of a pressing member being inserted between separators is assisted by an inclined surface, work at the time of inserting wiring for fuel cells in a crevice between separators will become easy.

Further, the rear end portion of the pressing member may have an edge portion that can be locked to a step portion provided in the separator.

  If it does in this way, after inserting wiring for fuel cells in the crevice between separators, it can control that the wiring concerned slips out from a crevice.

Further, a reinforcing plate that makes the insulating substrate difficult to bend may be provided near the tip of the insulating substrate.

  In this way, when the fuel cell wiring is inserted into the gap between the separators, the vicinity of the tip is difficult to bend, and the insertion work is facilitated.

  In addition, said each structure can be employ | adopted combining as much as possible.

  As described above, according to the present invention, wiring can be easily connected to each separator in the fuel cell.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

  With reference to FIGS. 1-6, the fuel cell wiring of the fuel cell which concerns on Example 1 of this invention is demonstrated.

<Overview of fuel cell>
The outline of the fuel cell will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view showing a state in which a fuel cell wiring according to Embodiment 1 of the present invention is incorporated in a fuel cell.

  Various known technologies can be applied to the fuel cell to which the fuel cell wiring according to this embodiment is connected. A fuel cell generally has a structure in which a plurality of unit cells are stacked. In addition, even if it says a laminated structure, it does not necessarily mean that it is used in the state piled up and down, and may be used in the state arranged in the horizontal direction. The basic configuration of the unit cell is, for example, as shown in FIG. 1, provided with an electrolyte membrane 30, a pair of electrodes 40 provided so as to sandwich the electrolyte membrane 30, and further sandwiching these electrodes 40. And a gasket 50 for sealing the region where the electrode 40 is provided.

  One of the pair of electrodes 40 is an anode electrode (fuel electrode), and the other is a cathode electrode (air electrode). The pair of electrodes 40 generates electricity by exchanging ions with the electrolyte membrane 30. Further, fuel (usually hydrogen) is supplied to the anode electrode, and air (oxygen) and water are supplied to the cathode electrode. Therefore, a sealing region is formed by the gasket 50 so that they do not leak to the outside.

  The power generation of the single battery configured in this way is generally about 0.7V. Then, by stacking a plurality of the unit cells, a structure is obtained in which the plurality of unit cells are connected in series via the separator 20 made of a conductive material, and a large power generation is obtained in the entire fuel cell.

<Usage method and usage example of fuel cell wiring>
The usage method and usage example of the fuel cell wiring 10 according to the present embodiment will be described with reference to FIG. The fuel cell wiring 10 according to the present embodiment is used in a state where the tip is inserted into the gap between the pair of separators 20. Thereby, the electrode part of the separator 20 and the wiring 10 for fuel cells is electrically connected. Here, the connecting portion of the electrode part of the fuel cell wiring 10 to the separator 20 is outside the sealed region formed by the gasket 50. Therefore, the gasket 50 has little influence on the sealing performance.

  Thus, the voltage between the separators 20 can be measured by electrically connecting the electrode portions of the fuel cell wiring 10 to the separators 20. Therefore, when an abnormality such as a decrease in the output voltage of the fuel cell occurs, it is possible to inspect where a failure or other abnormality has occurred by measuring the voltage between the separators. .

<Details near the connection of the fuel cell wiring to the separator>
Details of the vicinity of the connecting portion of the fuel cell wiring to the separator according to this embodiment will be described with reference to FIGS. FIG. 2 is a schematic cross-sectional view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 2 is a schematic cross-sectional view taken along the longitudinal direction and perpendicular to the plane of the planar fuel cell wiring.

  The fuel cell wiring 10 according to this embodiment is a flexible planar wiring. A more specific preferred example of the fuel cell wiring 10 is a flexible printed circuit (FPC).

  The fuel cell wiring 10 includes a base film 11 as an insulating substrate, an electric wire 12 as a conductive member formed on the base film 11, and a cover film provided on the opposite side of the base film 11 via the electric wire 12. 13. Both the base film 11 and the cover film 13 have insulating properties and flexibility, and are made of, for example, a heat resistant resin material such as polyimide. Moreover, although the copper 12 is mentioned as a suitable example as a material of the electric wire 12, the other material which has electroconductivity is also applicable. Although a plurality of the electric wires 12 are provided on the base film 11, only one electric wire 12 is shown in FIG. 3 because only a part of the tip of the fuel cell wiring 10 is shown.

  Further, the fuel cell wiring 10 includes an electrode 14 serving as an electrode portion connected to the electric wire 12, and a pressing member 15 provided on the surface on the opposite side of the electrode 14 via the electric wire 12 and the base film 11. The electrode 14 is exposed to the outside without being covered with the cover film 13 so as to be in contact with the separator 20. In addition, as a material of the electrode 14, although gold is mentioned as a suitable example, the other material which has electroconductivity is also applicable. The electrode 14 may be entirely exposed at the tip of the fuel cell wiring 10, or the periphery (for example, the S region shown in FIG. 3) may be covered with the cover film 13. . The pressing member 15 is made of an elastic material such as fluorine rubber, silicon rubber, EP rubber, or a spring.

  Further, when the fuel cell wiring 10 is assembled to the fuel cell, the tip thereof is bent (portion indicated by a two-dot chain line in FIG. 3). Therefore, it is preferable to provide the reinforcing member 16 in a region including at least a part of the bent portion. The reinforcing member 16 is provided to make it easier to attach the folding hooks of the fuel cell wiring 10 to improve workability, and to improve the strength so that cracks and the like do not occur in the bent portion. When the fuel cell wiring 10 is an FPC, unnecessary portions of the conductor on the insulating substrate (corresponding to the base film 11) are removed by a chemical or electrochemical method, whereby the electric wire 12 is formed. (So-called etching). Therefore, by this etching, the reinforcing member 16 can be easily formed by leaving the conductor in the region including at least a part of the portion to be bent together with the portion of the electric wire 12. In this case, the reinforcing member 16 is also made of the same material (copper or the like) as the material of the electric wire 12.

<Overall explanation of fuel cell wiring and how to incorporate it into the fuel cell>
The whole fuel cell wiring and how to incorporate it into the fuel cell will be described with reference to FIGS. FIG. 4 is a plan view of the vicinity of the end of the fuel cell wiring according to the first embodiment of the present invention. In FIG. 4, the separator 20 is also illustrated in order to schematically show the arrangement relationship with the separator 20 of the fuel cell. 5 and 6 are external views showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. In addition, in FIG. 5, the external view seen from the side incorporating the wiring for fuel cells was shown, and FIG. 6 has shown the external view seen from the side surface side. In this embodiment, a fuel cell in which five unit cells are stacked will be described as an example.

  The fuel cell wiring 10 is provided with a plurality of electric wires 12 and electrodes 14 with respect to one base film 11 and cover film 13. The plurality of electric wires 12 are arranged in parallel and at equal intervals. And the electrode 14 is provided in the front-end | tip of each electric wire 12, respectively. Further, the tip of the fuel cell wiring 10 has a stepped shape as shown so that the length of the electric wire 12 is different from the end. In addition, the base film 11 and a part of the cover film 13 are cut in the vicinity of the center between the adjacent electric wires 12 so that the tips of the electric wires 12 can be bent independently. The tip of each electric wire 12 can be bent together with the base film 11 and the cover film 13 in the vicinity of the end of the notch (two-dot chain line portion in FIG. 4). And the space | interval (equal to the space | interval of the longitudinal direction between the adjacent electrodes 14) L between these parts to be bent is set so as to correspond to the space | interval of the clearance gaps between the separators 20 in a fuel cell.

  In the fuel cell wiring 10 configured as described above, the distal end portion of the electric wire 12 having the longest end is bent together with the base film 11 and the cover film 13, and this distal end portion is one end side in the fuel cell (FIG. 5, FIG. 6 (lower side) in the gap between the pair of separators 20. Then, the leading end of the next long wire 12 is bent in the same manner, and this leading end is inserted between the adjacent separators 20 between the separators 20. In this manner, the respective leading end portions are inserted between the different separator 20 gaps, and the respective leading end portions are inserted between all the separator 20 gaps.

  However, the tip portion may be inserted into the gap between the separators 20 in the process of assembling the fuel cell, when the separator 20 is stacked, the tip portion may be inserted in advance, or after the fuel cell is assembled. , You may make it plug.

  As described above, each tip is inserted into the gap between the separators 20, so that the electrode 14 provided at each tip contacts one of the pair of separators 20, and the pressing member 15 contacts the other separator 20. Abut. Accordingly, the electrode 14 is pressed against the one separator 20 by the elastic repulsive force of the pressing member 15.

  The end of the fuel cell wiring 10 opposite to the end where the plurality of electrodes 14 are provided is bent at the other end of the fuel cell (upper side in FIGS. 5 and 6). A control circuit board 17 (in this embodiment, a circuit board for measuring the voltage between the separators 20) is provided at the end on this side. This control circuit board 17 is installed on the separator 20 on the other end side of the fuel cell as shown in FIGS. In addition, the area | region where the front-end | tip of the electric wire 12 is attached is restricted to the fixed range (range shown by T in FIG. 4) of the edge part of the separator 20. FIG.

<Effect obtained by the fuel cell wiring according to the present embodiment>
According to the fuel cell wiring 10 according to the present embodiment, the electrode 14 can be electrically connected to the separator 20 only by inserting each tip portion provided with the electrode 14 into the gap between the separators 20. Since the electrode 14 is pressed against the separator 20 by the pressing member 15, this electrical connection can be made more reliable, and the tip portion can be prevented from falling out of the gap between the separators 20. In addition, the electric wires 12 can be electrically connected to the plurality of separators 20 by a single fuel cell wiring 10. Therefore, the workability is far superior to the case where a plurality of independent wires are connected to each separator. Further, since the flexible planar fuel cell wiring 10 can be installed along the outer wall surface of the fuel cell, the installation space for the fuel cell wiring 10 can be reduced. Moreover, since the electrode 14 is installed outside the sealed region formed by the gasket 50, it is not necessary to insert the fuel cell wiring 10 into the sealed region, and adverse effects on the sealing performance can be suppressed. In particular, if the pressing force (elastic repulsive force) by the pressing member 15 is set to be smaller than the elastic repulsive force by the gasket 50, the adverse effect on the sealing performance can be more reliably suppressed. In general, it is often difficult to increase the dimensional accuracy of the gap between the separators in the fuel cell. However, according to this embodiment, the fuel cell wiring 10 itself is flexible, and fine adjustment of the bent portion of the tip portion allows each tip to be appropriately inserted in each gap even if the dimensional accuracy is not high. Part can be inserted.

  FIG. 7 shows a second embodiment of the present invention. In this embodiment, various specific examples of the shape of the pressing member will be described. The shape of the pressing member provided on the surface opposite to the electrode part described above is mainly the workability when inserting the tip part provided with the electrode part and the pressing member into the gap between the pair of separators, and It can be appropriately selected from the viewpoint of the stability of the installed state of the tip after insertion. A specific example is shown in FIG. FIG. 7 is an external view showing a shape example of a pressing member according to Embodiment 2 of the present invention. 7A, 7B, and 7C are external views as viewed from the side, and FIGS. 7D and 7E are external views as viewed from the front. In FIG. 7, the main part (base film, cover film, electric wire, electrode) of the fuel cell wiring excluding the pressing member is shown in a simplified manner.

  The pressing member 15a shown in (a) has a shape obtained by cutting a cylinder so as to pass through the center of the shaft (the shape of the side surface is a semicircle). The pressing member 15b shown in (b) has a rectangular parallelepiped part, and has a shape in which a side part shown in (a) is provided with a semicircular part in the vicinity of the center in the longitudinal direction of the rectangular parallelepiped part. The pressing member 15c shown in (c) has a shape in which an inclined surface that gradually increases in thickness from the tip is provided at the tip. The pressing member 15d shown in (d) has a rectangular parallelepiped portion, and a hemispherical protrusion portion is provided near the center of the rectangular parallelepiped portion in the width direction. The pressing member 15e shown in (e) has a rectangular parallelepiped shape in the width direction. In addition, the dotted line provided in each figure has shown the position of the interference. That is, the distance from the upper surface to this dotted line corresponds to the gap between the pair of separators 20.

  Here, after assembling the fuel cell, when inserting each tip portion provided with the electrode 14 in the fuel cell wiring 10 into the gap between the separators 20, a flat inclined surface is formed at the tip of the pressing member 15. It is preferable to provide an inclined surface (an example shown in FIGS. 7A, 7B, and 7D) (an example shown in FIG. 7C) or a curved surface (including a spherical surface). By providing such an inclined surface, each tip portion provided with the electrode 14 in the fuel cell wiring 10 is guided to an appropriate position in the gap between the separators 20, so that insertion workability is improved. In addition, when it is necessary to place importance on the stability of the installation state after the tip portion is inserted, a type with a flat bottom surface is desirable as shown in FIG. However, the above points assume that the upper surface on the separator 20 side is simply planar. Therefore, it goes without saying that the situation is somewhat different when special measures are taken to insert the respective tip portions where the electrodes 14 of the fuel cell wiring 10 are provided on the separator 20 side. For example, even in the type shown in FIG. 7D, if the groove corresponding to the hemispherical protrusion of the pressing member 15d is provided on the separator 20 side, the stability of the installed state after insertion is sufficient. Secured.

FIG. 8 shows a third embodiment of the present invention. In this embodiment, after inserting the tip portion provided with the electrode portion and the pressing member into the gap between the pair of separators, the pressing member is locked to the separator so that the tip portion does not fall out of the gap. An example with a mechanism is shown. FIG. 8 is a schematic cross-sectional view showing a state where the pressing member and the separator according to Embodiment 3 of the present invention are locked. In addition, in FIG. 8, the main-body part (a base film, a cover film, an electric wire, an electrode) of the wiring for fuel cells except a press member is simplified and shown collectively.

  The pressing member 15f according to the present embodiment has a substantially rectangular parallelepiped shape as a whole. And the flat inclined surface (C surface) is provided in the front end side so that thickness may become thick gradually. On the other hand, the rear end side is not provided with an inclined surface but is an edge.

  On the other hand, the separator 21 according to the present embodiment is provided with a step portion 22 at the end thereof. As a result, after the tip portion of the fuel cell wiring 10 where the electrode 14 and the pressing member 15f are provided is inserted into the gap between the separators 21, even if a force acts on the tip portion in the pulling direction, The edge portion (locking portion) of the rear end portion of the member 15f is caught by the step portion 22. Therefore, the tip portion is prevented from falling off.

  FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, a configuration is shown in which the pressing member is characterized so that the tip portion provided with the electrode portion and the pressing member can be inserted into the gap between the pair of separators using a jig. FIG. 9 is a schematic diagram illustrating a state where the pressing member according to the fourth embodiment of the present invention is fitted into a jig. However, FIGS. 9A and 9C are schematic diagrams viewed from the front side, and FIGS. 9B and 9D are schematic diagrams viewed from the side surface side. In addition, in FIG. 9, the main-body part (a base film, a cover film, an electric wire, an electrode) of the wiring for fuel cells except a press member is simplified and shown collectively.

  As described above, the tip portion where the electrode portion and the pressing member are provided is inserted between the separators in a state where the electric wire 12 is bent together with the base film 11 and the cover film 13. However, the base film 11 and the cover film 13 made of a resin material are generally difficult to be bent. As described above, if the reinforcing member 16 is provided, it is easy to bend the crease to some extent, but it may still be insufficient.

  If the bending wrinkle is difficult to stick, the tip end portion tends to return to the original state, which may hinder the operation of inserting the tip end portion into the gap between the separators. Therefore, a jig (a jig having a U-shaped portion at the tip) including a portion that sandwiches the pressing member portion from both sides and a portion that supports the pressing member from below so that the tip portion does not return to the original state. Thus, it is preferable to insert the tip portion into the gap between the separators.

  In the example shown in FIGS. 9A and 9B, the shape of the pressing member 15g is the same width as the width of the electrode 14 (actually the width of the base film 11 is equal), and narrower than that. And a shape having a portion. And the said front-end | tip part is inserted in the clearance gap between separators, pinching | interposing the U-shaped part of the jig | tool 61 in the narrow part of the press member 15g. Thereby, since this both ends and lower side of this width direction are supported, this tip part is inserted in the crevice between separators, maintaining the state where it bent. Therefore, it is possible to further facilitate the insertion work.

  In the example shown in FIGS. 9C and 9D, the shape of the pressing member 15 h has a shape having only a portion whose width is narrower than the width of the electrode 14. And the said front-end | tip part is inserted in the clearance gap between separators, pinching | interposing the U-shaped part of the jig | tool 62 to the pressing member 15h. Thereby, since this both ends and lower side of this width direction are supported, this tip part is inserted in the crevice between separators, maintaining the state where it bent. Therefore, it is possible to further facilitate the insertion work.

  FIG. 10 shows a fifth embodiment of the present invention. In this embodiment, a configuration in which a reinforcing plate that makes the base film difficult to bend is provided at the tip of the base film is shown. FIG. 10 is a schematic cross-sectional view of a fuel cell wiring according to Embodiment 5 of the present invention. Since the basic configuration is the same as that of the first embodiment, the same reference numeral is given to the same configuration, and the description thereof is omitted as appropriate.

  In this embodiment, the fuel cell wiring 10 a is provided with a reinforcing plate 18 near the tip of the base film 11, and a pressing member 15 is provided on the reinforcing plate 18. The reinforcing plate 18 may be made of the same material as the base film 11. Thus, by providing the reinforcing plate 18, the vicinity of the tip can be made difficult to bend. Thereby, the operation | work which inserts the front-end | tip part in which the electrode 14 and the press member 15 are provided in the clearance gap between a pair of separators 20 can be made easier.

  The region where the reinforcing plate 18 is provided is preferably a region avoiding the bent portion of the tip portion, and may be provided only on the tip side of the bent portion, or only on the rear end side of the bent portion. Alternatively, it may be provided on both the front end side and the rear end side of the bent portion.

  In addition, since the part except the said front-end | tip part considers workability | operativity and the ease of arrangement | positioning, it is better to bend easily, Therefore It is meaningless to thicken the base film 11 whole thickness. In addition, it is not practical to increase the thickness of only a part of the base film 11 (the part where the reinforcing plate 18 is provided) because of technical difficulties. Of course, if it is not accompanied by technical difficulties, it is also possible to exert the same effect as that provided with the reinforcing plate by increasing the thickness of a part of the base film 11.

(Other)
In each of the embodiments described so far, the case where the pressing member is fixed to the base film has been described. However, the pressing member is separated from the main body of the fuel cell wiring, and the pressing member is inserted after the electrode portion is inserted. You can also plug it in. Further, when the pressing member is a separate member, the vicinity of the electrode portion can be bent by inserting the pressing member without bending the vicinity of the electrode portion in advance. In this case, as a separate member, in addition to a member having elasticity by itself, such as rubber or a metal spring, a member that attaches an elastic body to a rigid body and exhibits an elastic function (pressing function) as a whole Applicable. Moreover, the pressing member can be divided into a part fixed to the base film and a separate part. For example, an elastic body such as rubber may be fixed to the base film, and another rigid body or the like may be inserted separately from the main body.

FIG. 1 is a schematic cross-sectional view showing a state in which a fuel cell wiring according to Embodiment 1 of the present invention is incorporated in a fuel cell. FIG. 2 is a schematic cross-sectional view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 4 is a plan view of the vicinity of the end of the fuel cell wiring according to the first embodiment of the present invention. FIG. 5 is an external view showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. FIG. 6 is an external view showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. FIG. 7 is an external view showing a shape example of a pressing member according to Embodiment 2 of the present invention. FIG. 8 is a schematic cross-sectional view showing a state where the pressing member and the separator according to Embodiment 3 of the present invention are locked. FIG. 9 is a schematic diagram illustrating a state where the pressing member according to the fourth embodiment of the present invention is fitted into a jig. FIG. 10 is a schematic cross-sectional view of a fuel cell wiring according to Embodiment 5 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a Fuel cell wiring 11 Base film 12 Electric wire 13 Cover film 14 Electrode 15, 15a, 15b, 15c, 15d, 15e, 15f, 15g, 15h Press member 16 Reinforcement member 17 Control circuit board 18 Reinforcement plate 20, 21 Separator 22 Stepped portion 30 Electrolyte membrane 40 Electrode 50 Gasket 61 Jig 62 Jig

Claims (6)

In the planar fuel cell wiring having flexibility ,
A conductive member provided on a flexible insulating substrate;
An electrode portion that contacts the separator of the fuel cell and electrically connects the separator and the conductive member;
A pressing member that is provided on a surface opposite to the contact side of the electrode portion with the separator and presses the electrode portion;
In the region outside the sealed region formed by the gasket provided between the pair of separators, the electrode portion abuts against one separator, and the electrode member is pressed against the one separator by the pressing member. Fuel cell wiring,
A plurality of the conductive members are disposed with respect to the insulating substrate, and the electrode portions are provided at the ends of the conductive members,
While the distance in the longitudinal direction between the electrode portions is set to correspond to the gap between the separators,
The insulating substrate is disposed so as to face the side surface side of the separator provided in a multilayer shape, and the tip of each conductive member is bent together with the insulating substrate and inserted into a gap between different separators. A fuel cell wiring characterized by the above.   2. The fuel cell wiring according to claim 1, wherein the pressing force by the pressing member is set to be smaller than an elastic repulsive force by the gasket. 2. A reinforcing member is provided in a region including at least a part of the bent portion of the insulating substrate to make it easier to bend the insulating substrate and reinforce the strength of the insulating substrate. Or the fuel cell wiring according to 2; The fuel cell wiring according to any one of claims 1 to 3 , wherein an inclined surface that assists introduction into a gap between a pair of separators is provided at a tip portion of the pressing member. The fuel cell wiring according to any one of claims 1 to 4 , wherein a rear end portion of the pressing member has an edge portion that can be locked to a stepped portion provided in the separator. Wherein in the vicinity of the distal end of the insulating substrate, wiring for a fuel cell according to any one of claims 1-5, characterized in that the reinforcing plate for difficult to bend the insulating substrate is provided.

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