JP2016012408A - Manufacturing method of fuel battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an insertion property of a fuel battery body to a case by preventing a surplus part of an interposing layer from being stacked on an outer peripheral surface of the fuel battery body, and preventing a load required for insertion from being increased when accommodating the fuel battery body into the case while crushing the interposing layer.SOLUTION: A manufacturing method of a fuel battery includes the steps of: (a) disposing the interposing layer on the outer peripheral surface of the fuel battery body before being accommodated in the case, in a stacking direction of a plurality of unit cells, wherein conditions of N<T1 and 0≤T2<N are satisfied when maximum thickness is defined as T1 in thickness of the interposing layer in a vertical direction that is vertical to the stacking direction, minimum thickness is defined as T2 and a distance between the fuel battery body after being accommodated in the case and the case in the vertical direction is defined as N; and (b) inserting the fuel battery body with which the interposing layer is disposed, into the case in the stacking direction.

Description

  The present invention relates to a method for manufacturing a fuel cell.

  In order to improve the vibration resistance and impact resistance of the fuel cell, for example, between the fuel cell stack and a tension plate extending along the stacking direction of a plurality of single cells constituting the fuel cell stack. A fuel cell in which an elastic material such as silicon or urethane rubber is disposed as an intervening layer has been proposed (Patent Document 1). In order to achieve the same object, a fuel cell in which an intervening layer is disposed between a fuel cell main body (fuel cell stack) and a case housing the fuel cell main body inside may also be used.

JP 2003-203670 A

  As a manufacturing method of a fuel cell having an intervening layer between the fuel cell main body and the case, the following two methods are assumed. The first method is a manufacturing method in which an intervening layer is disposed on the side surface of the fuel cell main body, and then the fuel cell main body is inserted into the case while collapsing the intervening layer. The second method is a method of assembling the case by disposing an intervening layer on the surface of the fuel cell main body and then disposing panels for constituting the case on each surface of the surface of the fuel cell main body. However, in the first method, the surplus of the crushed intervening layer is accumulated on the outer peripheral surface of the fuel cell body as the fuel cell body is inserted. As a result, the load required for insertion increases, and there is a problem that the insertion cannot be performed when a predetermined load is reached. The second method requires a bolt and a gasket for assembling the case, which increases the number of parts and increases the manufacturing cost of the fuel cell. Further, the need for a space for inserting the gasket and the head of the bolt projecting from the case hinder the miniaturization of the fuel cell. In addition, in the conventional fuel cell, cost reduction, easy manufacturing, resource saving, and the like have been desired.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

  According to one aspect of the present invention, a method for manufacturing a fuel cell is provided. The fuel cell manufacturing method includes a fuel cell main body including a cell stack in which a plurality of single cells are stacked, a case housing the fuel cell main body inside, and a fuel cell main body disposed between the fuel cell main body and the case. And (a) the intervening layer along the stacking direction of the plurality of single cells in the fuel cell main body before being accommodated in the case. A step of arranging on the outer peripheral surface; among the thicknesses of the intervening layers along the vertical direction perpendicular to the stacking direction, the maximum thickness is T1 and the minimum thickness is T2, and after being accommodated in the case The distance between the fuel cell main body and the case in the vertical direction is N; N <T1 and 0 ≦ T2 <N; and (b) the intervening layer The fuel cell main body arranged, the stacking direction Comprises; along the steps of inserting into the case with. According to the fuel cell manufacturing method of this aspect, as the fuel cell body is inserted into the case, the surplus portion of the collapsed intervening layer generated in the portion having the intervening layer thickness T1 is moved to the portion having the thickness T2. (Flow). For this reason, it can suppress that the surplus part of an intervening layer accumulate | stores on the outer peripheral surface of the fuel cell main body 10. FIG. Therefore, it is possible to suppress an increase in the load required for insertion, and it is possible to improve the insertability of the fuel cell main body into the case. In addition, since the surplus portion of the intervening layer generated in the portion having the thickness T1 can be filled into the gap between the portion having the thickness T2 and the case, it is possible to suppress the generation of a gap between the intervening layer and the case. . For this reason, it is possible to suppress a reduction in vibration resistance and impact resistance in the fuel cell.

  The present invention can be realized in various forms. For example, it is realizable with forms, such as a fuel cell, a fuel cell system provided with the fuel cell, a vehicle carrying the fuel cell system.

It is sectional drawing which shows the structure of the fuel cell 100 manufactured by the manufacturing method of the fuel cell as 1st Embodiment of this invention. 3 is a flowchart showing a method for manufacturing the fuel cell 100. FIG. 3 is a cross-sectional view showing the configuration of the fuel cell main body 10 after completion of Step S10. It is sectional drawing which shows the structure of the fuel cell 100 in execution of step S20. 3 is an exploded cross-sectional view showing a configuration of a fuel cell 200 in Comparative Example 1. FIG. 12 is a cross-sectional view schematically showing a part of the manufacturing process of the fuel cell 300 in Comparative Example 2. FIG. FIG. 3 is a cross-sectional view showing the configuration of the fuel cell main body 10 after completion of Step S10. FIG. 4 is a cross-sectional view showing a cross section in a direction perpendicular to the stacking direction SD of the fuel cell main body 10 after step S10 is completed. 10 is a cross-sectional view showing a cross section in a direction perpendicular to the stacking direction SD of the fuel cell main body 10 after completion of Step S10 in Modification 1. FIG. 10 is a flowchart showing a method for manufacturing a fuel cell in Modification 3. It is sectional drawing which shows the structure of the fuel cell 100d during execution of step S20.

A. First embodiment:
A-1. Configuration of Fuel Cell FIG. 1 is a cross-sectional view showing a configuration of a fuel cell 100 manufactured by a method for manufacturing a fuel cell as a first embodiment of the present invention. The fuel cell 100 includes a fuel cell main body 10, a case 20, and an intervening layer 30. The fuel cell 100 is a so-called polymer electrolyte fuel cell, and constitutes a fuel cell system together with a reaction gas (fuel gas and oxidant gas) supply unit, a cooling medium supply unit, and the like. Such a fuel cell system is mounted and used in an electric vehicle or the like as a system for supplying driving power, for example.

  The fuel cell main body 10 includes a stacked body 11 and a pair of terminal plates 15. The stacked body 11 has a structure in which a plurality of single cells are stacked along the stacking direction SD, and has a substantially cubic appearance. The single cell includes a membrane electrode assembly and a gas diffusion layer, and a pair of separators that sandwich the membrane electrode assembly and the gas diffusion layer. The pair of terminal plates 15 are disposed outside the single cell located at both ends of the stacked body 11.

  The case 20 includes a case main body portion 21 and a case front side surface portion 25. The case main body 21 has a substantially cubic external shape having a gap for accommodating the fuel cell main body 10 inside. One of the surfaces constituting the case body 21 is an opening. The case front side surface portion 25 is paired with the case main body portion 21 and accommodates the fuel cell main body 10. In the present embodiment, the case main body portion 21 and the case front side surface portion 25 are made of steel. In addition, it may replace with steel and may be formed with another metal, resin, etc. Let N be the distance in the direction perpendicular to the stacking direction SD between the fuel cell main body 10 and the case 20 in a state after the fuel cell main body 10 is accommodated inside the case 20.

  The intervening layer 30 is disposed between the side surface of the fuel cell main body 10 along the stacking direction SD and the case 20. In the state where the fuel cell main body 10 is accommodated in the case 20, the thickness of the intervening layer 30 (the length in the direction perpendicular to the stacking direction SD) is equal to N for the above-described distance. In the present embodiment, the intervening layer 30 is made of silicon rubber. In addition, it may replace with silicone rubber and may be formed with the material which has another softness | flexibility. The intervening layer 30 may be enclosed in a bag body such as polypropylene.

A-2. FIG. 2 is a flowchart showing a method for manufacturing the fuel cell 100. First, the intervening layer 30 is disposed on the outer peripheral surface of the fuel cell main body 10 (step S10).

  FIG. 3 is a cross-sectional view showing the configuration of the fuel cell main body 10 after step S10 is completed. In FIG. 3, the case 20 is represented by a broken line for convenience of explanation. As shown in FIG. 3, in the present embodiment, the intervening layer 30 has a configuration in which thick portions 31 and thin portions 32 are alternately arranged along the stacking direction SD. In FIG. 3, the intervening layer 30 is disposed on the upper surface and the lower surface of the outer peripheral surface along the stacking direction SD of the fuel cell main body 10. Has been placed. The thick part 31 and the thin part 32 surround the outer peripheral surface of the fuel cell main body 10 over the entire circumference.

  In the state before the fuel cell main body 10 is housed inside the case 20, the thickness of the thick portion 31 is greater than the distance N. Further, in a state before the fuel cell main body 10 is accommodated inside the case 20, the thickness of the thin portion 32 is 0 (zero) and is smaller than the distance N. As shown in FIG. 3, the thickness of the thick portion 31 corresponds to the maximum thickness T <b> 1 in the thickness T of the intervening layer 30. Further, the thickness of the thin portion 32 corresponds to the minimum thickness T2 in the thickness T of the intervening layer 30. In other words, in step S10 of the present embodiment, the base material of the intervening layer 30 is disposed on the outer peripheral surface of the fuel cell main body 10 while providing a gap along the stacking direction SD.

  As shown in FIG. 2, after step S <b> 10 is executed, the fuel cell main body 10 in which the intervening layer 30 is disposed on the outer peripheral surface is inserted into the case main body 21 from the opening of the case main body 21. (Step S20).

  FIG. 4 is a cross-sectional view showing the configuration of the fuel cell 100 during the execution of step S20. The white arrows in FIG. 4 indicate the insertion direction of the fuel cell main body 10. As shown in FIG. 4, when the fuel cell main body 10 is inserted into the case main body 21, the intervening layer 30 (thick part 31) is crushed by the case main body 21. Along with this, the surplus portion 33 of the generated intervening layer 30 (the volume in the thick portion 31 corresponding to the difference between the distance N and the maximum thickness T1) is opposite to the insertion direction (the adjacent thin portion 32 side). Move to. Thus, when the thin wall portion 32 is inserted into the case main body portion 21, the gap between the thin wall portion 32 and the case main body portion 21 is filled with the surplus portion 33, and the thickness of the thin wall portion 32 is Distance N. After completion of step S20, the fuel cell 100 is completed by assembling the case front side surface portion 25 to the case main body portion 21.

  According to the manufacturing method of the fuel cell 100 of the present embodiment described above, the thickness T1 of the thick portion 31 is larger than the distance N, so that the fuel cell main body 10 is placed on the case main body 21 while the intervening layer 30 is crushed. Can be inserted. For this reason, it can suppress that a space | gap arises between the intervening layer 30 and the case main-body part 21. FIG. In addition, since the thin portion 32 is provided in the intervening layer 30, the surplus portion 33 generated by crushing the thick portion 31 can be moved to the thin portion 32. Since the thickness T2 of the thin portion 32 is smaller than the distance N, the surplus portion 33 is prevented from being inserted into the case main body portion 21 by moving the surplus portion 33 to the thin portion 32. Can be suppressed. Therefore, an increase in the load required for insertion is suppressed, and the insertability of the fuel cell main body 10 into the case 20 can be improved. In addition, when the thin wall portion 32 is inserted into the case main body portion 21, the gap between the thin wall portion 32 and the case main body portion 21 is filled with the surplus portion 33. For this reason, in the state where the fuel cell main body 10 is accommodated in the case 20, it is possible to suppress the generation of a gap between the intervening layer 30 and the case 20. Therefore, it is possible to suppress a reduction in vibration resistance and impact resistance in the fuel cell.

A-3. Comparative Example A-3-1. Comparative Example 1
FIG. 5 is an exploded cross-sectional view showing the configuration of the fuel cell 200 in the first comparative example. The fuel cell 200 of Comparative Example 1 includes a plurality of bolts 250 and a plurality of gaskets 260. The case 220 is configured by assembling six independent panels 222. In the method of manufacturing the fuel cell 200 in Comparative Example 1, the intervening layer 230 is disposed on the surface of the fuel cell body 210, and then the panel 222 is disposed on each surface of the surface of the fuel cell body 210 to assemble the case 220. The case 220 is assembled by disposing the sealing gasket 260 between the panels 222 and pressing the panels 222 against the surface of the fuel cell body 210 with the bolts 250 from the outside of the case 220 with the bolts 250. It is done by fastening.

  In the manufacturing method of the fuel cell 200 according to the comparative example 1, the plurality of bolts 250 and the plurality of gaskets 260 for assembling the case 220 are necessary, so that the number of parts increases and the manufacturing cost of the fuel cell 200 increases. Further, the space for inserting the gasket 260 is required, and the head of the bolt 250 protrudes from the case 220, thereby preventing the fuel cell 200 from being downsized. On the other hand, according to the manufacturing method of the fuel cell 100 in the first embodiment described above, the fuel cell main body 10 in which the intervening layer 30 is disposed is inserted into the case main body portion 21, so that the number of parts is not increased. An increase in manufacturing cost can be suppressed, and downsizing is not hindered.

A-3-2. Comparative Example 2
FIG. 6 is a cross-sectional view schematically showing a part of the manufacturing process of the fuel cell 300 in Comparative Example 2. In the fuel cell 300 of Comparative Example 2, the thickness of the intervening layer 330 is substantially uniform at any position along the stacking direction SD before and after insertion. In the method of manufacturing the fuel cell 300 in Comparative Example 2, the fuel cell main body 310 is inserted into the case main body 321 after the intervening layer 330 is disposed on the surface of the fuel cell main body 310. At this time, as the fuel cell main body 310 is inserted into the case main body portion 321, a surplus portion of the crushed intervening layer 330 is generated. Accumulated in. Therefore, when the load required for insertion increases and reaches a predetermined load, the fuel cell main body 310 cannot be inserted into the case main body 321. On the other hand, according to the manufacturing method of the fuel cell 100 in the first embodiment described above, the surplus portion 33 generated by crushing the thick portion 31 of the intervening layer 30 can be moved to the thin portion 32. Therefore, it is possible to prevent the surplus portion 33 from preventing the fuel cell main body 10 from being inserted into the case main body portion 21.

B. Second embodiment:
FIG. 7 is a cross-sectional view showing the configuration of the fuel cell main body 10 after the completion of step S10. FIG. 8 is a cross-sectional view showing a cross section in the direction perpendicular to the stacking direction SD of the fuel cell main body 10 after step S10 is completed. In FIG. 8, the AA cross section in FIG. 7 is expanded and shown. In FIG. 7 and FIG. 8, the case main body 21 and the case front side surface 25 are represented by broken lines for convenience of explanation.

  The fuel cell of the second embodiment differs from the fuel cell 100 of the first embodiment in the shape of the intervening layer 30a. Since the other configuration is the same as that of the first embodiment, the same reference numeral is assigned to the same configuration and the description thereof is omitted. In addition, the method for manufacturing the fuel cell in the second embodiment is the same as the method for manufacturing the fuel cell 100 in the first embodiment, and a description thereof will be omitted.

  As shown in FIG. 7, the intervening layer 30a has substantially the same configuration at any position along the stacking direction SD. As shown in FIG. 8, the intervening layer 30 a is disposed on the four outer peripheral surfaces along the stacking direction SD of the fuel cell main body 10, in the vicinity of the junction with the other two outer peripheral surfaces. Therefore, a total of two intervening layers 30a are disposed on each outer peripheral surface. Each intervening layer 30a includes a thick portion 31a disposed in the center and thin portions 32a disposed on both ends of the thick portion 31a.

  As shown in FIG. 8, the thick part 31a has a substantially triangular cross-sectional shape. In addition, it may replace with a substantially triangular shape and may have arbitrary cross-sectional shapes, such as a rectangle and a semicircle. In a state before the fuel cell main body 10 is inserted into the case 20, a part of the thick portion 31 a near the center is thicker than the distance N. In addition, the thickness near the both ends in the thick part 31a is not more than the distance N. The thickness of the thin portion 32a is constant at any position and is equal to the minimum thickness of the thick portion 31a. In the intervening layer 30a having such a configuration, the maximum thickness of the thick portion 31a corresponds to the maximum thickness T1 of the intervening layer 30a. The thickness of the thin portion 32a (in other words, the minimum thickness in the thin portion 32a) corresponds to the minimum thickness T2 of the intervening layer 30a. In addition, as shown in FIG. 8, in this embodiment, thickness T2 is larger than 0 (zero).

  According to the manufacturing method of the fuel cell 100a of the second embodiment, the thick portion 31a is crushed by the case main body 21 when step S20 (insertion step) is executed. A surplus (not shown) generated along with this (the volume of the thick portion 31a where the thickness is larger than the distance N) moves to the thin portion 32a adjacent to the thick portion 31a. Therefore, the manufacturing method of the fuel cell 100a of the second embodiment has the same effect as the manufacturing method of the fuel cell 100 of the first embodiment. In addition, since the intervening layer 30a has a substantially protrusion-like shape in cross section, the thin portion 32a is present on both ends of the thick portion 31a, so that the thick portion 31a is crushed by the case main body 21. The surplus can be easily moved (filled) to another portion (thin wall portion 32a).

As can be understood from the first embodiment and the second embodiment described above, any intervening layer satisfying the following formula (1) may be employed in the method for manufacturing a fuel cell of the present invention.
N <T1 and 0 ≦ T2 <N (1)

  In the above formula (1), the distance N means a distance along a vertical direction perpendicular to the stacking direction SD between the case 20 and the fuel cell main body after being accommodated in the case 20. T1 means the maximum thickness among the thicknesses of the intervening layers along the vertical direction of the intervening layer. T2 means the minimum thickness of the intervening layers along the vertical direction of the intervening layer.

C. Variation:
C-1. Modification 1
The intervening layer 30a of the second embodiment has a configuration in which the thick portion 31a is provided at the center and the thin portions 32a are provided on both ends thereof, but the present invention is not limited to such a configuration. FIG. 9 is a cross-sectional view showing a cross section in a direction perpendicular to the stacking direction SD of the fuel cell main body 10 after completion of Step S10 in Modification 1. FIG. 9A shows an example of a cross section perpendicular to the stacking direction SD of the fuel cell main body 10 after completion of step S10, and FIG. 9B shows the stacking direction of the fuel cell main body 10 after completion of step S10. The other example of the cross section of the direction perpendicular | vertical to SD is shown. In FIG. 9, the cross section at the same position as the AA cross section in FIG. 7 is shown enlarged.

  As shown in FIG. 9A, the interposition layer 30b is configured such that the thick portion 31b and the thin portion 32b are adjacent to each other in the direction perpendicular to the stacking direction SD, so that the interposition layer 30b as a whole has a tapered cross-sectional shape. It is good also as a structure which has. The maximum thickness in the thick portion 31b corresponds to the thickness farthest from the joint with the thin portion 32b, and corresponds to the maximum thickness T1 of the entire intervening layer 30b. The minimum thickness in the thin portion 32b corresponds to the thickness at the position farthest from the joint with the thick portion 31b, and corresponds to the minimum thickness T2 of the entire intervening layer 30b. If step S20 is performed in such a state, the thick part 31b will be crushed by the case main-body part 21. FIG. A surplus portion (volume of a portion where the thickness is larger than the distance N in the thick portion 31b) generated along with this moves to the thin portion 32b adjacent to the thick portion 31b. Therefore, it has the same effect as the fuel cell manufacturing method of the second embodiment.

  As shown in FIG. 9B, the interposition layer 30c may have a configuration in which thick portions 31c and thin portions 32c are alternately arranged along a direction perpendicular to the stacking direction SD. The thick portion 31c has a tapered cross-sectional shape that is thickest at the center and decreases toward both ends. The thin part 32c has the same configuration as the thin part 32 of the first embodiment. In other words, in the configuration of FIG. 9B, in step S10, the base material of the intervening layer 30c includes a plurality of gaps on the outer peripheral surface of the fuel cell main body 10 along the direction perpendicular to the stacking direction SD. It is formed by arranging in rows. When step S20 is executed in such a state, the thick portion 31c is crushed by the case main body portion 21. A surplus portion (volume of a portion where the thickness is larger than the distance N in the thick portion 31c) generated along with this moves to the thin portion 32c adjacent to the thick portion 31c. Therefore, it has the same effect as the fuel cell manufacturing method of the second embodiment.

C-2. Modification 2
In the first embodiment, the intervening layer 30 (the thick portion 31 and the thin portion 32) is disposed so as to surround the outer peripheral surface of the fuel cell main body 10 over the entire circumference. However, the present invention is limited to this. It is not something. Similarly to the intervening layer 30a of the second embodiment, the four outer peripheral surfaces along the stacking direction SD of the fuel cell main body 10 may be arranged in the vicinity of the junctions with the other two outer peripheral surfaces. Moreover, you may comprise the intervening layer 30 of 1st Embodiment so that a cross-sectional shape may become a shape similar to the cross-sectional shape of the intervening layers 30a-30c in 2nd Embodiment and the modification 1. FIG.

C-3. Modification 3
In the fuel cell 100 of each embodiment and each modification, a configuration in which a thin plate 40 is further provided between the fuel cell main body 10 and the case 20 may be employed. The thin plate 40 is a thin plate-like member and can be formed of, for example, polypropylene. The surface of the thin plate 40 is smooth and has high lubricity. In addition, it may replace with polypropylene and may form with other resin etc. which have high lubricity and insulation. The thin plate 40 can also serve as an insulator that insulates the fuel cell main body 10 and the case 20. For this reason, the increase in the number of parts of a fuel cell by providing the thin plate 40 can be suppressed.

  FIG. 10 is a flowchart showing a method for manufacturing a fuel cell in Modification 3. The method for manufacturing the fuel cell in Modification 3 is different from the method for manufacturing the fuel cell 100 in the first embodiment shown in FIG. 2 in that Step S15 is executed between Steps S10 and S20 described above. Since the other procedures (steps S10 and S20) in the third modification are the same as those in the method for manufacturing the fuel cell 100 in the first embodiment, detailed description thereof is omitted. After step S10 is executed, the thin plate 40 is disposed on the outer surface of the intervening layer 30 (step S15).

  FIG. 11 is a cross-sectional view showing the configuration of the fuel cell 100d during execution of step S20. Since the highly slippery thin plate 40 is disposed on the intervening layer 30, the fuel cell main body 10 can be easily inserted into the case main body 21 in step S20. In addition, since good slipperiness is obtained between the intervening layer 30 and the thin plate 40, the intervening layer 30 adheres to the thin plate 40 and does not move even if the intervening layer 30 is an adhesive substance. Can be suppressed. For this reason, the surplus portion 33 generated by crushing the intervening layer 30 can be quickly moved to the thin portion 32.

  The present invention is not limited to the above-described embodiments and modifications, and can be realized with various configurations without departing from the spirit thereof. For example, the technical features in the embodiments and the modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Fuel cell main body 11 ... Laminated body 15 ... Terminal plate 20 ... Case 21 ... Case main-body part 25 ... Case front side surface part 30 ... Interposition layer 30a ... Interposition layer 30b ... Interposition layer 30c ... Interposition layer 31 ... Thick part 31a ... Thick part 31b ... Thick part 31c ... Thick part 32 ... Thin part 32a ... Thin part 32b ... Thin part 32c ... Thin part 33 ... Surplus 40 ... Thin plate 100 ... Fuel cell 100a ... Fuel cell 100d ... Fuel cell 200 ... Fuel cell 210 ... Fuel cell main body 220 ... Case 222 ... Panel 230 ... Intervening layer 250 ... Bolt 260 ... Gasket 300 ... Fuel cell 310 ... Fuel cell main body 321 ... Case main body 330 ... Intervening layer N ... Distance SD ... Stacking direction T ... Thickness T1 ... Maximum thickness T2 ... Minimum thickness

Claims (1)

A fuel cell main body including a cell stack in which a plurality of single cells are stacked, a case for housing the fuel cell main body inside, and an intervening layer disposed between the fuel cell main body and the case. A fuel cell manufacturing method comprising:
(A) disposing the intervening layer on an outer peripheral surface along the stacking direction of the plurality of single cells in the fuel cell main body before being accommodated in the case,
Of the thicknesses of the intervening layers along the vertical direction perpendicular to the stacking direction, the maximum thickness is T1, the minimum thickness is T2, and the fuel cell main body and the case after being accommodated in the case When the distance along the vertical direction is N,
N <T1 and 0 ≦ T2 <N
Satisfying the process,
(B) inserting the fuel cell main body in which the intervening layer is disposed into the case along the stacking direction;
A method for manufacturing a fuel cell.

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