KR101636613B1 - Separator for Fuel Cell and High Temperature Polymer Electrolyte Membrane Fuel Cell Having the Same - Google Patents

Abstract

Disclosed herein is a separator for a fuel cell having an improved structure capable of maintaining a constant temperature distribution and improving the operating performance of the fuel cell, and a high temperature type polyelectrolyte fuel cell having the separator. The separation plate for a fuel cell according to the present invention comprises a plate-shaped body, an inlet provided on one side of the body, an outlet disposed on one side of the body and aligned with the inlet, And a serpentine flow path formed on one side of the body so as to extend to the outlet. Since the separator according to the present invention has a gas flow structure in which the gas distribution uniformly appears over the entire area, the temperature distribution and the current distribution are uniformly displayed as a whole, thereby improving the performance and reliability of the fuel cell.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a separator for a fuel cell and a high temperature type polymer electrolyte fuel cell having the separator for a fuel cell,

The present invention relates to a separator for a fuel cell, and more particularly, to a separator for a fuel cell having a flow path for guiding a gas and a high temperature type polyelectrolyte fuel cell having the separator.

Fuel cell technology is one of the technologies that are attracting attention today as a new environmentally friendly future energy technology that generates electric energy from substances abundant on the earth such as hydrogen and oxygen.

The principle of a fuel cell is to convert the chemical energy of hydrogen and oxygen into direct electrical energy by an electrochemical reaction. It consists of a cathode, an anode and an electrolyte contained between them. Electrolysis of water As the electrochemical reaction proceeds in the reverse reaction mode, electricity, heat, and water are generated, and electric energy can be obtained with high efficiency without inducing pollution. Such a fuel cell can be classified into a phosphoric acid fuel cell (PAFC), a molten carbonate fuel cell (MCFC), a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEMFC), a methanol fuel cell (DMFC) Batteries (AFC) and the like.

Among them, the polymer electrolyte fuel cell is a solid polymer polymer in which the electrolyte is not a liquid, but is distinguished from other fuel cells. The polymer electrolyte fuel cell has advantages such as high efficiency, current density and power density, short start-up time, and fast response to load change, compared with other types of fuel cells. As a fuel for a polymer electrolyte fuel cell, hydrogen is used as a fuel electrode (cathode) and air is used as an oxidizing electrode (anode). Considering safety, hydrogen is directly loaded from the raw materials such as natural gas, gasoline, methanol, etc. through partial oxidation, steam reforming and decomposition, Production methods are being adopted.

A high temperature type polyelectrolyte fuel cell (HT-PEMFC) operates at a high temperature of 120 ° C or higher, whereas a general polymer electrolyte fuel cell operates at 60 to 80 ° C. High-temperature polyelectrolyte fuel cells have advantages such as increased resistance to pollutants contained in fuels such as carbon monoxide due to their high operating temperature, increase in fuel cell reaction rate, simplification of water management system by low humidification or no humidification operation And many studies have been conducted recently.

Actual polymer electrolyte fuel cells are made of a stack structure in which several membrane electrode assemblies (MEAs) and separator plates are laminated for high power. The membrane electrode assembly is an integral structure of an electrolyte plate containing an electrolyte, a fuel electrode and an air electrode. The separator plate serves to uniformly supply hydrogen and air to the membrane electrode assembly, and electrically connects the membrane electrode assembly to increase the power.

The separation plate has a flow path for guiding fuel or air. The separator plate must have a structure for uniformly distributing the supplied fuel to the inside, and thereby the fuel cell performance and reliability can be ensured by keeping the internal current distribution and the temperature distribution constant.

However, when the separator is applied to a high-temperature type polymer electrolyte fuel cell, there is a problem that the gas flows along the flow path and heat is accumulated through the chemical reaction, so that the temperature of the gas discharge channel becomes excessively higher than that of the gas introduction channel. And thus causes the performance of the fuel cell to deteriorate.

It is an object of the present invention to provide a separator for a fuel cell having an improved structure capable of improving the operating performance of the fuel cell and having a uniform temperature distribution during operation, Temperature type polyelectrolyte fuel cell.

Another object of the present invention is to provide a high temperature type polyelectrolyte fuel cell having an improved structure capable of improving the efficiency by promoting an electrochemical reaction.

According to an aspect of the present invention, there is provided a separator for a fuel cell comprising a plate-shaped body, an inlet provided on one side of the body, an outlet disposed in parallel with the inlet on one side of the body, And a serpentine flow path that starts from the inlet and extends from the center of the body to the outlet, and is serpentine on one side of the body.

According to another aspect of the present invention, there is provided a separator for a fuel cell, comprising: a plate-shaped body; an inlet disposed at an intermediate portion of the body to penetrate the other surface of the body; And a plurality of serpentine flow paths branched at the inlet and serpentine on one surface of the body so as to be connected to each of the plurality of outlets.

The flow regions of the gas through the plurality of meandering flow paths on one side of the body may be equally divided by the respective meandering flow paths.

According to another aspect of the present invention, there is provided a fuel cell separator according to another aspect of the present invention, including: a plate-shaped body; an inlet disposed at an intermediate portion of the body to penetrate the other surface of the body; And a plurality of serpentine shapes branched from the inlet and serpentine on one side of the body so as to be connected to each of the plurality of outlets, Includes the Euro.

The flow regions of the gas through the plurality of meandering flow paths on one side of the body may be equally divided by the respective meandering flow paths.

According to an aspect of the present invention, there is provided a high temperature type PEM fuel cell comprising: a membrane electrode assembly comprising an electrolyte plate containing an electrolyte and a fuel electrode and an air electrode coupled to both sides of the electrolyte membrane; And an outlet disposed on one side of the body so as to be parallel to the inlet, and the outlet of the outlet is disposed on one side of the body, And a serpentine flow path starting from an inlet and passing through a central portion of the body and extending to the outlet, the serpentine flow path being formed on one surface of the body.

According to another aspect of the present invention, there is provided a high temperature type polyelectrolyte fuel cell comprising a plurality of unit cells each having a separation plate coupled to both sides of a membrane electrode assembly having an electrolyte membrane containing an electrolyte and a fuel electrode and an air electrode, An inlet line connected to the stack for supplying gas into the stack; a discharge line connected to the stack for discharging gas from within the stack; And a heat exchanger connecting the inlet line and the outlet line for exchanging heat between the inlet gas flowing along the outlet line and the outlet gas flowing along the outlet line, wherein the separation plate of the stack comprises a plate- An outlet disposed in parallel with the inlet on one side of the body, It passes through the center portion of the outlet so as to extend to include a serpentine flow path that is tortuous be provided on one surface of the body.

The high temperature type polyelectrolyte fuel cell according to the present invention has a gas flow structure in which a separator provided therein has a uniform gas distribution over the entire surface. Therefore, the temperature distribution and the current distribution in the separator are uniformly displayed as a whole, thereby improving the performance and reliability of the fuel cell.

Also, in the high-temperature type PEM fuel cell according to the present invention, the inflow pipe and the discharge pipe are arranged side by side and the double pipe heat exchanger is connected thereto, so that the temperature of the inflow gas supplied to the stack rises. Therefore, the electrochemical reaction is promoted in the stack to improve the efficiency of the entire system, and the temperature of the stack can be increased quickly, thereby reducing the start-up time of the stack.

1 is an exploded perspective view showing a separator for a fuel cell according to a first embodiment of the present invention and a high temperature type polymer electrolyte fuel cell having the separator.
Fig. 2 is a plan view showing the separator shown in Fig. 1. Fig.
3 is a plan view showing a separator for a fuel cell according to the second example of the present invention.
4 is a perspective view showing a separator for a fuel cell according to a third embodiment of the present invention.
5 is a perspective view showing a separator for a fuel cell according to a fourth and a fifth example of the present invention.
FIG. 6 illustrates a high temperature type PEM fuel cell according to another embodiment of the present invention.

Hereinafter, a separator for a fuel cell and a high temperature type polyelectrolyte fuel cell having the separator according to the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation. In addition, the terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

 FIG. 1 is an exploded perspective view showing a separator for a fuel cell and a high temperature type polymer electrolyte fuel cell having the separator according to a first embodiment of the present invention, and FIG. 2 is a plan view showing the separator shown in FIG.

1, a high temperature type polyelectrolyte fuel cell 10 according to an embodiment of the present invention includes a membrane electrode assembly 12 and a pair of gas electrodes 12a and 12b which are respectively coupled to both surfaces of the membrane electrode assembly 12, A diffusion film 12 and a pair of separator plates 20 which are respectively coupled to both surfaces of the membrane electrode assembly 12 with the gas diffusion film 14 sandwiched therebetween. Here, the membrane electrode assembly 12 has a structure in which an anode and an air electrode are integrally coupled to both surfaces of an electrolyte plate containing an electrolyte as in a conventional fuel cell, and the gas diffusion membrane 14 It is the same as that provided in a typical fuel cell. In the following, detailed description of the components similar to those of the prior art will be omitted.

The high-temperature-type polyelectrolyte fuel cell 10 according to the present invention operates at a high temperature of 120 ° C or more as in a conventional high temperature type polyelectrolyte fuel cell. In the case of conventional polymer electrolyte fuel cells, flooding should be considered in designing the flow path. Flooding is a phenomenon of water accumulation in the flow path. When flooding occurs, performance is reduced because it prevents gas flow. Therefore, when designing the shape of the flow path, a structure in which the flow path is raised from below to prevent water from being accumulated in the flow path should be avoided. However, the high temperature type polyelectrolyte fuel cell 10 according to the present invention has a structure in which the flow path rises from bottom to top, so that the flooding phenomenon does not occur and the flow path design is easier.

 A pair of separator plates (20) are respectively coupled to the fuel electrode and the air electrode on both sides of the membrane electrode assembly (12). The separator plate 20 connected to the fuel electrode of the membrane electrode assembly 12 serves to uniformly supply the fuel gas to the fuel electrode and the separator plate 20 connected to the air electrode of the membrane electrode assembly 12 is provided with air To be supplied uniformly. The pair of separator plates 20 have the same structure although their functions are different.

1 and 2, the separator plate 20 includes a plate-shaped body 21, an inlet 22 and an outlet 23 provided on one side of the body 21, an inlet 22, And a serpentine flow path 24 provided on one surface of the body 21 to be coupled with the membrane electrode assembly 12 to connect the outlet 23 with the membrane electrode assembly 12. The inlet 22 and the outlet 23 are arranged side by side on one side of four sides of the body 21 so that the opening direction is the same. Further, the inlet 22 and the outlet 23 are disposed adjacent to each other so that the gas (fuel gas or air) flowing through each of them can be heat-exchanged with each other. That is, the inflow gas passing through the inlet 22 is heated by receiving heat from the hot exhaust gas passing through the outlet 23.

The meandering flow path 24 is formed on one surface of the body 21 so as to extend from the inlet 22 to the outlet 23 through the central portion of the body 21. The meandering flow path 24 has a serpentine structure bent at right angles several times. Specifically, the meandering flow path 24 extends along the edge of the body 21 on one side of the body 21, changes its direction toward the center of the body 21, And is connected to one side of the body 21 which has been started for the first time. Therefore, the gas introduced into the inlet 22 flows along the meandering flow path 24 in the most part except for a part of the outermost part of the body 21, such as the edge and the central part of the body 21, And is discharged to the outlet 23 uniformly.

In the case of the separator of the conventional high-temperature type PEM fuel cell, the phenomenon that the temperature of the outlet is excessively high as compared with the temperature of the inlet due to the accumulation of heat by the chemical reaction while the flowing gas flows along the flow path of the separator Occurs. However, the separator plate 20 according to the present invention is such that the heat of the exhaust gas passing through the outlet 23 is transferred to the inflow gas passing through the inlet 22 such that the temperature of the outlet 23 is excessively high It does not rise. Since the inflow gas flowing through the inlet 22 is heated by receiving heat from the exhaust gas passing through the outlet 23, the temperature deviation between the gas at the inlet 22 side and the gas at the outlet 23 is reduced. The portion extending from the inlet 22 to the central portion of the meandering flow path 24 and the portion extending from the central portion of the meandering flow path 24 to the outlet 23 are disposed adjacent to each other, Heat exchange occurs actively between the gas flowing to the outlet 23 and the gas flowing from the center portion to the outlet 23. Therefore, the thermal deviation between the edge portion and the center portion of the separator plate 20 is small, and the temperature distribution of the entire separator plate 20 uniformly appears.

Thus, the separator plate 20 according to the present embodiment has a gas flow structure in which the gas distribution uniformly appears over the entire area. Accordingly, the temperature distribution and the current distribution are uniformly displayed as a whole, and the performance and reliability of the high temperature type polyelectrolyte fuel cell 10 can be improved.

In the present embodiment, the specific structure of the separator plate 20 is not limited to that shown and can be variously changed. For example, the body may be modified into various other shapes, such as an oval shape, in addition to the rectangular shape as shown. And the meandering flow path may be changed to another structure such as a meander structure bent a plurality of times at various angles other than a right angle or a curved meander structure. It is also shown that the inlet 22 and the outlet 23 are formed to be open in the same direction, but the inlet and outlet are positioned adjacent to each other in parallel, even though the opening direction is somewhat different, Lt; / RTI >

3 is a plan view showing a separator for a fuel cell according to a second embodiment of the present invention.

3, the separator 30 according to the second embodiment of the present invention includes a plate-like body 31, two inlets 32 and 35 provided on one side of the body 31, Two outlets 33 and 36 and two meandering flow paths 34 and 37 provided on one surface of the body 31. [

The first inlet 32 and the first outlet 33 are arranged side by side so as to open in the same direction on one side of the body 31. The second inlet 35 and the second outlet 36 are arranged side by side so as to open in the same direction on one side of the body 31. Since the inlets 32 and 35 and the outlets 33 and 36 are disposed adjacent to and on the same side of the same side of the body 21, the inflow gas passing through the inlets 32 and 35, Heat exchange occurs actively between the exhaust gas passing through the heat exchangers 36 and 36.

The first meandering flow path 34 is formed on one surface of the body 31 so as to extend from the first inlet 32 to the first outlet 33 through the central portion of the body 31. The first meandering flow path 34 extends along the edge of the body 31 from one side of the body 31 to change its direction toward the center of the body 31 and then toward the other edge of the body 31 And is connected to one side of the body 31 which is extended and started first. The second meandering flow path 37 has the same shape as the first meandering flow path 34 and extends from the second inlet 35 to the second outlet 36 through the central portion of the body 31 And is formed on one surface of the body 31 in a meandering manner. The second meandering flow path 37 has a meandering structure bent at a right angle many times like the first meandering flow path 34. According to the structure of the meandering flow paths 34 and 37, the gas flowing into the inlets 32 and 35 flows along the meandering flow paths 34 and 37 along the edge and the central part of the body 31, Most part except for a part of the outermost part of the body 31 or the like is uniformly passed through the center part and discharged to the outlets 33 and 36. [

In this embodiment, one inlet pipe may be connected to the pair of inlets 32 and 35, and one outlet pipe may be connected to the pair of outlets 33 and 36. The number of meandering flow paths connecting the inlet and the outlet and the respective inlets and outlets is not limited to two as shown and can be variously changed.

4 is a perspective view illustrating a separator for a fuel cell according to a third embodiment of the present invention.

4, the separation plate 40 according to the third embodiment of the present invention includes a plate-like body 41, an inlet 44 provided at the center of the body 41, A plurality of outlets 45, 47, 49 and 51 provided so as to be spaced apart from each other on the side surfaces 42 and 43 and a plurality of outlets 45, 47, 49 and 51, 46, 48, 50 and 52 connecting the first and second meandering channels 46, 48, 50 and 52, respectively. The inlet 44 is provided at the center of the body 41 so as to penetrate the other surface from one surface of the body 41.

Two outlets 45, 47, 49 and 51 are provided on two opposite side surfaces 42 and 43 of the four sides of the body 41, respectively. The plurality of meandering flow paths 46, 48, 50 and 52 are branched from one inlet 44 and connected to the body 41 so as to be connected to each of the plurality of outlets 45, 47, 49, On the other side. The plurality of outlets 45, 47, 49 and 51 take a meandering structure bent at right angles a plurality of times.

The flow regions of the gas through the plurality of serpentine flow paths 46, 48, 50 and 52 on one side of the body 41 are separated by the respective serpentine flow paths 46, 48, 50 and 52 . A first flow region 53 extending from the inlet 44 to the first outlet 45 through the first serpentine flow path 46 and a second flow region 53 extending from the inlet 44 via the second serpentine flow path 48, A second flow region 54 leading to the second outlet 47 and a third flow region 55 leading from the inlet 44 to the third outlet 49 through the third serpentine flow passage 50, The fourth flow region 56 extending from the first flow passage 44 to the fourth flow passage 51 through the fourth meandering flow passage 52 is formed around the inlet 44 with the same area.

The separator plate 40 according to this embodiment has a gas flow structure in which the gas distribution uniformly appears over the entire area. Therefore, the temperature distribution and the current distribution are uniformly displayed as a whole, and the performance and reliability of the high-temperature type polyelectrolyte fuel cell can be improved.

In this embodiment, the number of the meandering flow paths connecting the inlet and the outlet and the respective inlets and the outlets is not limited to that shown and can be variously changed. In addition, the inlet 44 may be provided so as to penetrate the other surface from one side to the other side in the middle of the body 41. Also, the plurality of outlets may be arranged in various arrangement structures on the side of the body in addition to the arrangement structure shown.

5 is a perspective view illustrating a separator for a fuel cell according to a fourth and a fifth example of the present invention.

5, the separator 60 according to the fourth embodiment of the present invention includes a plate-like body 61, an inlet 62 provided at the center of the body 61, A plurality of outlets 63, 65, 67 and 69 provided in the middle and a plurality of meandering channels 64, 66, 68 and 70 provided on one surface of the body 61 do.

The inlet 62 is provided at the center of the body 61 so as to penetrate the other surface from one surface of the body 61. The plurality of outlets 63, 65, 67 and 69 are provided through the other surface of the body 61 so as to be spaced apart from each other in the middle of the body 61 spaced from the inlet. The distances from the inlet 62 to the respective outlets 63, 65, 67 and 69 are all the same.

The plurality of meandering flow paths 64, 66, 68 and 70 are branched from one inlet 62 and connected to the body 61 so as to be connected to the respective outlets 63, 65, 67 and 69, respectively. On the other side. The plurality of outlets 63, 65, 67 and 69 are arranged at right angles to each other in the form of a meandering structure bent from the entrance 62 to the exit 63, 65, 67 and 69, It takes a form to converge.

The flow regions of the gas through the plurality of meandering flow paths 64, 66, 68 and 70 on one side of the body 61 are separated by the respective meandering flow paths 64, 66, 68 and 70 . A first flow region 71 extending from the inlet 62 to the first outlet 63 through the first serpentine flow path 64 and a second flow region 71 extending from the inlet 62 via the second serpentine flow path 66, A second flow region 72 leading to the second outlet 65 and a third flow region 73 extending from the inlet 62 to the third outlet 67 through the third serpentine flow passage 68, 62 and the fourth flow passage 74 through the fourth meandering flow passage 70 to the fourth outlet 69 is formed around the inlet 62 with the same area.

The separation plate 60 according to this embodiment has an evenly divided structure with a plurality of flow regions 71, 72, 73 and 74, so that the gas distribution is uniform over the whole area, And the current distribution are uniform throughout.

In this embodiment, the number of the meandering flow paths connecting the inlet and the outlet and the respective inlets and the outlets is not limited to that shown and can be variously changed. And the plurality of outlets may be provided in a layout structure other than the layout layout as shown.

Meanwhile, FIG. 6 shows a high temperature type PEM fuel cell according to another embodiment of the present invention.

The high-temperature type polyelectrolyte fuel cell 80 according to another embodiment of the present invention shown in FIG. 6 includes a stack 81 in which unit electricity is stacked and a stack 81 connected to supply the gas into the stack 81 A discharge tube 83 connected to the stack 81 for discharging gas from the stack 81 and a heat exchanger 84 connecting the inlet tube 82 and the discharge tube 83 . Here, the unit cell constituting the stack 81 has a structure in which a pair of separator plates are coupled to both surfaces of the membrane electrode assembly like the fuel cell 10 shown in Fig. The pair of separator plates constituting the unit cells are arranged such that the inlet and the outlet are adjacent to the same side of the body such as the separator plate 20 shown in Figs. 1 and 2 or the separator plate 30 shown in Fig. 3 It is the arrangement of the structure.

The high-temperature polyelectrolyte fuel cell 80 includes an inlet pipe 82 connected to the inlet of the separator plate and a discharge pipe 83 connected to the outlet of the separator plate. The inlet pipe 82, And the discharge pipe 83 is connected to the heat exchanger 84. [ The heat exchanger 84 induces active heat exchange between the inlet pipe 82 and the outlet pipe 83. In operation of the high temperature type polyelectrolyte fuel cell 80, the heat of the high temperature exhaust gas passing through the discharge pipe 83 is actively transmitted to the inflow gas passing through the inflow pipe 82.

As described above, in the high temperature type polyelectrolyte fuel cell 80 according to the present embodiment, the inflow pipe 82 and the discharge pipe 83 are arranged side by side, and the double pipe heat exchanger 84 is connected to the stack It is possible to improve the temperature of the inflow gas to be supplied to the heat exchanger 81. Therefore, the electrochemical reaction is promoted in the stack 81 to improve the efficiency of the entire system, and the temperature of the stack 81 can be quickly increased to reduce the start-up time of the stack 81 .

In the high temperature type polyelectrolyte fuel cell 80 according to the present embodiment, the separator plate of the unit cells constituting the stack 81 may have a structure as shown in Fig. 4 or Fig. 4, a plurality of outlets 45, 47, 49 and 51 are connected by a single discharge pipe, and an inlet pipe connected to the discharge pipe or the inlet is bent and arranged They can be connected to a heat exchanger in one state. In the case where the separation plate has the structure as shown in Fig. 5, a plurality of outlets 63, 65, 67, and 69 are connected to one outlet pipe, and an inlet pipe connected to the outlet pipe or the inlet is bent and arranged It is possible to connect them to the heat exchanger.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

10, 80: High Temperature Polymer Electrolyte Fuel Cell
12: membrane electrode composite 14: gas diffusion membrane
20, 30, 40, 60: separation plate 21, 31, 41, 61: body
22, 32, 35, 44, 62: entrance
23, 33, 36, 45, 47, 49, 51, 63, 65, 67, 69:
24, 34, 37, 46, 48, 50, 52, 64, 66, 68, 70:
53, 54, 55, 56, 71, 72, 73, 74:
81: stack 82: inlet pipe
83: discharge pipe 84: heat exchanger

Claims (7)

delete delete delete A plate - shaped body; A single inlet disposed in the middle of the body so as to penetrate the other surface from one surface of the body; A plurality of outlets provided through the other surface of the body so as to be spaced apart from each other in the middle of the body spaced from the inlet; And a plurality of serpentine flow paths branched from the inlet and serpentine on one surface of the body so as to be connected to each of the plurality of outlets,
Wherein a flow region of the gas through the plurality of serpentine flow paths on one side of the body is equally divided by the respective serpentine flow paths, and each of the plurality of outlets is divided into a plurality of serpentine flow paths And are spaced apart from each other in the middle. delete delete A stack having a plurality of unit cells stacked on both sides of a membrane electrode assembly having a fuel electrode and an air electrode coupled to an electrolyte plate containing an electrolyte and having a separator interposed therebetween;
An inlet line connected to the stack for supplying gas into the stack;
A discharge line connected to the stack for discharging gas from within the stack; And
And a heat exchanger connecting the inlet line and the outlet line for exchanging heat between the inlet gas flowing along the inlet line and the outlet gas flowing along the outlet line,
The separator plate of the stack,
A plate-shaped body, a single inlet arranged to pass through the other surface at one side of the body in the middle of the body, a plurality of plates arranged in the middle of the body spaced apart from the inlet, And a plurality of serpentine flow paths branched from the inlet and serpentine on one surface of the body so as to be connected to each of the plurality of outlets,
Wherein a flow region of the gas through the plurality of serpentine flow paths on one side of the body is equally divided by the respective serpentine flow paths, and each of the plurality of outlets is divided into a plurality of serpentine flow paths Wherein the fuel cells are arranged so as to be spaced apart from each other in the middle.

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