WO2019209044A1

WO2019209044A1 - Gas distribution module and fuel cell system including same

Info

Publication number: WO2019209044A1
Application number: PCT/KR2019/005005
Authority: WO
Inventors: 최성호; 김연길; 이준우
Original assignee: 주식회사 미코
Priority date: 2018-04-26
Filing date: 2019-04-25
Publication date: 2019-10-31
Also published as: KR20190124595A; CN112042024B; KR102495975B1; CN112042024A

Abstract

Disclosed is a gas distribution module for a fuel cell system, which supplies a reactant gas to a plurality of fuel cell modules. The gas distribution module comprises: a first chamber having a first inner space; a second chamber having a second inner space surrounding the first inner space; a first gas pipe for supplying the reactant gas to the first inner space; a plurality of second gas pipes connecting the first inner space to the fuel cell modules and supplying a reactant gas to the fuel cell modules, respectively; a third gas pipe which receives an exhaust gas discharged from the fuel cell modules and supplies the exhaust gas to the second inner space; and a fourth gas pipe for discharging the exhaust gas out of the second inner space. The gas distribution module can supply a uniform amount of reactant gas to the plurality of fuel cell modules.

Description

Gas distribution module and fuel cell system having same

The present invention relates to a gas distribution module and a fuel cell system having the same capable of reducing the power deviation generated from each of the plurality of fuel cell modules.

Fuel cells that generate electricity through the electrochemical reaction of hydrogen and oxygen have been actively researched recently because of the simple energy conversion step and the eco-friendly nature of high efficiency and pollution-free generators.

In general, a fuel cell system employs a plurality of stacks, bundles, and the like connected in parallel to achieve high power. In this case, when the power variation generated in each aggregate is large, not only the system becomes unstable, but also the durability deteriorates. In particular, in the case of a solid oxide fuel cell (SOFC) system that generates power at a high temperature of about 600 to 1000 ° C., the generation of such power irregularities may make the above problem more serious.

Therefore, in a fuel cell system employing a plurality of fuel cell assemblies such as a fuel cell stack, development of a technology capable of uniformly controlling the amount of fuel and air supplied to the fuel cell assembly is required.

One object of the present invention is to provide a gas distribution module capable of uniformly supplying gas to a plurality of fuel cell modules.

Another object of the present invention is to provide a fuel cell system including the gas distribution module.

The gas distribution module for a fuel cell system according to an exemplary embodiment of the present invention supplies a reactive gas to a plurality of fuel cell modules. The gas distribution module for a fuel cell system includes a first chamber including a first partition wall forming a first internal space; A second chamber including a second partition wall forming a second interior space surrounding the first interior space; A first gas pipe connected to the first internal space and supplying the reaction gas to the first internal space; A plurality of second gas pipes connecting the first internal space to the fuel cell modules and supplying the reaction gas to the fuel cell modules, respectively; A third gas pipe connected to the second internal space and configured to receive exhaust gas discharged from the fuel cell modules and supply the exhaust gas to the second internal space; And a fourth gas pipe connected to the second inner space at a position spaced apart from the third gas pipe and discharging the exhaust gas from the second inner space.

In an embodiment, the first partition wall may be sealed at a first bottom portion having a circular or regular polygonal shape, a first sidewall portion extending upward from an edge portion of the first bottom portion, and an open upper end portion of the first sidewall portion. A second side wall portion disposed to surround the first side wall portion in a state spaced apart from the first side wall portion, and the first side wall part from a lower end of the second side wall portion; A second bottom portion extending to a portion to seal the lower end of the second inner space and a second cover extending from the upper end of the second side wall portion to the first side wall portion to seal the upper end of the second inner space. It may include wealth.

In an embodiment, the height of the second sidewall portion may be at least 1/2 of the height of the first sidewall portion.

In example embodiments, the plurality of fuel cell modules may include N fuel cell modules disposed at equal intervals from each other along a virtual circle, and the second gas pipes may penetrate the center of the virtual circle. It may include N pipes extending radially from the first side wall portion with respect to the central axis of the first internal space, the length of the N pipes may be the same.

In one embodiment, the reaction gas may be a hydrocarbon fuel gas, and the second gas pipes may be connected to the fuel flow paths inside the fuel cell modules, respectively.

In an embodiment, the third gas pipe may be connected to an outlet of a fuel flow path inside the fuel cell modules, and supply exhaust fuel gas discharged from the fuel cell modules to the second internal space.

In one embodiment, the reaction gas may be air containing oxygen, and the second gas pipes may be connected to the fuel flow paths inside the fuel cell modules, respectively.

In an embodiment, the third gas pipe may be connected to an air flow path outlet inside the fuel cell modules, and supply air discharged from the fuel cell modules to the second internal space.

In one embodiment, the gas distribution module for the fuel cell system is disposed inside the first internal space divides the first internal space into a first sub-space and a second sub-space, the reaction gas can move The apparatus may further include a branch plate on which through holes are formed. In this case, the first gas pipe may be connected to the first sub space, and the second gas pipes may be connected to the second sub space.

In some embodiments, the branch plate may include a central region having a first diameter and an edge region surrounding the central region, and the through holes may be formed in the edge region.

A fuel cell system according to an exemplary embodiment of the present invention includes a plurality of fuel cell modules disposed at equal intervals along a virtual circle; A first fuel through hole and a second fuel through hole which are disposed under the fuel cell module and communicate with the inlet and the outlet of the fuel flow paths, respectively; A connection plate having a first air through hole and a second air through hole formed therein; And a first gas distribution module disposed below the connection plate and supplying air to the fuel cell modules, wherein the first gas distribution module passes through the center of the imaginary circle and is connected to the connection plate. A first chamber including a first partition wall defining a first interior space having a vertical first central axis; A second chamber including a second partition wall forming a second interior space surrounding the first interior space; A first gas pipe connected to the first internal space and supplying air supplied from an external air source to the first internal space; A plurality of second gas pipes connecting the first internal space and the first air through holes to supply the air to the fuel cell modules; A third gas pipe connecting the second internal space and the second air through holes and supplying exhaust air discharged from the fuel cell modules to the second internal space; And a fourth gas pipe connected to the second inner space at a position spaced apart from the third gas pipe and discharging the exhaust air from the second inner space.

In one embodiment, the fuel cell system may further include a second gas distribution module disposed below the first gas distribution module, in which case the second gas distribution module is the same as the first central axis. A third chamber including a third partition wall forming a third internal space having a central axis and disposed below the first chamber; A fourth chamber including a fourth partition wall forming a fourth inner space surrounding the third inner space; A fifth gas pipe connecting the third internal space and a reformer and supplying the fuel gas supplied from the reformer to the third internal space; A plurality of sixth gas pipes connecting the third internal space and the first fuel through holes to supply the fuel gas to the fuel cell modules; A seventh gas pipe connecting the fourth internal space and the second fuel through holes and supplying the exhaust fuel gas discharged from the fuel cell modules to the fourth internal space; And an eighth gas pipe connected to the fourth internal space at a position spaced apart from the seventh gas pipe and discharging the exhaust fuel gas from the fourth internal space.

The fuel cell system may further include a current collecting member electrically connecting the fuel cell modules, wherein the current collecting member extends from a first current collecting terminal and the first current collecting terminal. A first current collector including first contact branches electrically connected to the negative terminals of the second electrodes and having the same length, thickness, and width as each other; And a second current collecting terminal disposed below the first current collecting terminal and a second contact branch extending from the second current collecting terminal and electrically connected to the positive terminals of the fuel cell modules, respectively, and having the same length, thickness, and width as each other. It may include a second current collector including the parts.

According to the gas distribution module and the fuel cell system of the present invention, since a uniform amount of fuel and air can be supplied to the plurality of fuel cell modules, variations in power generated by the fuel cell modules can be minimized. In addition, since relatively cool fuel and air may be heated and supplied to the fuel cell modules by using heat generated by the fuel cell modules and heat of high temperature exhaust gas during power generation, the fuel cell modules may be supplied with the temperature variation of the fuel cell modules. Not only can it solve the problem of deterioration in durability, but it can also improve power generation efficiency.

1 is a cross-sectional view illustrating a gas distribution module for a fuel cell system according to an exemplary embodiment of the present invention.

FIG. 2 is a perspective view illustrating the branch plate illustrated in FIG. 1.

3 is a perspective view illustrating a fuel cell system according to an exemplary embodiment of the present invention.

4 is a perspective view for explaining an embodiment of a current collector member.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a cross-sectional view illustrating a gas distribution module for a fuel cell system according to an exemplary embodiment of the present invention, and FIG. 2 is a perspective view illustrating the branch plate shown in FIG. 1.

Referring to FIG. 1, the gas distribution module 100 for a fuel cell system according to an exemplary embodiment of the present invention may include a first chamber 110, a second chamber 120, a first gas pipe 130, and a second gas pipe. Field 140, a third gas pipe 150, and a fourth gas pipe 160, the reaction gas such as fuel gas or air may be uniformly supplied to the plurality of fuel cell modules. On the other hand, the gas distribution module 100 for a fuel cell system according to an embodiment of the present invention may further include a branch plate 170.

The first chamber 110 may include a first partition wall 111 forming a first inner space 11 through which the gas is supplied through the first gas pipe 130 from the outside. In one embodiment, the first partition wall 111 includes a first bottom portion, a first sidewall portion extending upward from an edge portion of the first bottom portion, and a first cover portion coupled to an upper end of the first sidewall portion. can do. The first bottom part may have a circular or polygonal shape, and the first side wall part may form the first internal space 11 having a circular or polygonal cross section, and the shape of the first cover part is not particularly limited. . The gas may be hydrogen-containing fuel gas or oxygen-containing air for power generation of the fuel cell.

The second chamber 120 is disposed to surround the first sidewall portion of the first chamber 110 and the second chamber 120 surrounds at least a portion of the first sidewall portion together with the first sidewall portion of the first chamber 110. The second partition wall 121 forming the inner space 12 may be included. In one embodiment, the second partition wall 121 is a second side wall portion disposed to surround the first side wall portion in a state spaced apart from the first side wall portion, extending inward from the lower end of the second side wall portion; A second bottom part coupled to a first partition wall part of the first chamber 120 and extending from an upper end part of the second side wall part to seal a lower end part of the inner space 12 and the first chamber 120. It may include a second cover portion coupled to the first partition portion of the sealing the upper end of the inner space (12). The second bottom part may extend in parallel with the first bottom part from an outer surface of the first side wall part and have an outer edge of a circular or polygonal shape. The second sidewall portion may extend upward from the edge portion of the second bottom portion in a state spaced apart from the first sidewall portion. Although the height of the second sidewall portion is smaller than the height of the first sidewall portion in FIG. 1, the height of the second sidewall portion may be equal to or greater than the height of the first sidewall portion. However, considering the heat exchange efficiency between the hot gas supplied to the second inner space 12 and the low temperature gas supplied to the first inner space 11, the height of the second side wall portion is the height of the first side wall portion. May be at least 1/2, preferably at least 4/5. The second cover part may extend from the upper end of the second side wall part to the first partition wall 111 in an inward direction.

The second internal space 12 of the second chamber 120 may be supplied with a high-temperature exhaust gas discharged from the fuel cell module through the third gas pipe 150, the second internal space 12 The high temperature exhaust gas supplied to the air may heat the gas supplied to the first internal space 11 of the first chamber 110 through heat exchange.

The first gas pipe 130 may be connected to the first internal space 11 of the first chamber 110, and supply external gas to the first internal space 11. In an embodiment, the first gas pipe 130 may be connected to the first internal space 11 of the first chamber 110 via the second internal space 12 of the second chamber 120. And may not be connected to the second internal space 12 of the second chamber 120.

In one embodiment, when the gas distribution module 100 according to the present invention is a gas distribution device for uniformly supplying fuel gas to a plurality of fuel cell modules (see FIG. 3 '), the first gas pipe 130 may supply the fuel gas received from the reformer (not shown) for reforming the fuel gas to the first internal space 11.

In another embodiment, when the gas distribution module 100 according to the present invention is a gas distribution device for uniformly supplying air to a plurality of fuel cell modules (see '1100' in FIG. 3), the first gas pipe The 130 may supply the air provided from the air supply source (not shown) for supplying the air to the first internal space 11.

The second gas pipes 140 may connect a plurality of fuel cell modules (see 1100 of FIG. 3) to the first internal space 11 of the first chamber 110, respectively. The second gas pipes 140 may have the same size and shape so that resistance to the movement of the gas is the same, and as a result, it is possible to uniformly supply gas to the fuel cell modules. In one embodiment, when the N fuel cell modules are arranged at equal intervals along the imaginary circle on the connecting plate, the gas such that the central axis of the first chamber 110 coincides with the center of the imaginary circle. A distribution module 100 may be disposed below the connection plate, and the N second gas pipes 140 may be configured based on the central axis of the first internal space passing through the center of the virtual circle. It may include N pipes extending radially from the side wall portion, it may extend from the first partition wall 111 of the first chamber 110 may be connected to the fuel cell modules through the connection plate, respectively. In this case, the N pipes may have the same diameter, length, and shape.

The third gas pipe 150 may be connected to the second internal space 12 of the second chamber 120. The third gas pipe 150 may receive the high temperature exhaust fuel gas or the high temperature exhaust air discharged from the fuel cell modules and supply the high temperature exhaust fuel gas to the second internal space 12 of the second chamber 120. .

The fourth gas pipe 160 may be connected to the second internal space 12 of the second chamber 120. The fourth gas pipe 160 may discharge the hot gas supplied by the third gas pipe 150 to the outside of the second internal space 12 of the second chamber 120.

In one embodiment, when the gas distribution module 100 according to the present invention is a gas distribution device for uniformly supplying fuel gas to a plurality of fuel cell modules (see FIG. 3 '), the fourth gas pipe 160 is connected to a heat exchange device (not shown) applied to a fuel cell system for additional heat exchange of the high temperature exhaust fuel gas or to a burner device (not shown) that burns exhaust fuel gas to generate thermal energy or to an external outlet. Can be connected to.

In another embodiment, when the gas distribution module 100 according to the present invention is a gas distribution device for uniformly supplying air to a plurality of fuel cell modules (see '1100' in FIG. 3), the fourth gas pipe 160 may be connected to a heat exchanger (not shown) applied to a fuel cell system or to an external outlet for additional heat exchange of the hot exhaust air.

On the other hand, in order to improve the heat exchange efficiency of the high-temperature exhaust gas supplied into the second internal space 12 of the second chamber 120, the third gas pipe 150 and the fourth gas pipe 160 Are spaced apart from each other, for example, may be connected to opposite sides of the second chamber 120 from each other.

The gas distribution module 100 for a fuel cell system according to an exemplary embodiment of the present invention is disposed in the first internal space 11 of the first chamber 110 so that the first internal space 11 is divided into two spaces, For example, the apparatus may further include one or more branch plates 170 coupled to the first partition wall 111 to divide the first sub space 11a and the second sub space 11b as illustrated in FIG. 1. Can be.

The branch plate 170 may have a plate structure having the same shape as the cross-sectional shape of the first internal space 11, and may include through holes 171 through which gas may move. In one embodiment, the through holes 171 of the branch plate 170 may be formed in the edge region except for the center region of the branch plate 170 as shown in FIG. 2.

When the splitter plate 170 is applied, the first gas pipe 130 may be connected to the first sub space 11a positioned below the first internal space 11 of the first chamber 110. The second gas pipes 140 may be connected to a second sub space 11b positioned at an upper portion of the first internal space 11 of the first chamber 110.

When the branch plate 170 is applied as described above, the branch plate 170 may reduce the pulsation of the gas supplied through the first gas pipe 130 as well as the second gas pipes. The variation in the amount of gas supplied to 140 can be significantly reduced.

Referring to FIG. 3 together with FIGS. 1 and 2, a fuel cell system 1000 according to an exemplary embodiment of the present invention may include a plurality of fuel cell modules 1100, a connection plate 1200, and a first gas distribution module 1300. And a second gas distribution module 1400.

The fuel cell modules 1100 may be a stack which is a collection of flat unit cells, a bundle which is a collection of tubular or flat tube cells, and the unit cells may be a solid oxide fuel cell (SOFC) or a polymer electrolyte fuel cell. (PEMFC), phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC) and the like.

The unit cell included in each of the fuel cell modules 1100 may include an anode, a cathode, and an electrolyte disposed therebetween, and the hydrocarbon fuel gas and oxygen (O ₂ ) may be disposed on the anode and the cathode. When each of the air containing is supplied, the oxygen ions (O ^2- ) reduced in the air electrode is moved to the fuel electrode via the electrolyte, the oxygen ions (O ^2- ) moved to the fuel electrode to the fuel electrode Reacts with hydrogen (H ₂ ) generated from the supplied hydrocarbon fuel to generate water (H ₂ O) and electrons (e ⁻ ), and the unit cell generates electrical energy using the electrons generated through the reaction as described above. can do. Each of the fuel cell modules includes a fuel flow path through which the fuel gas is supplied and an air flow path through which the air is supplied. Meanwhile, each of the fuel flow path and the air flow path may include an inlet through which fuel gas or air is injected and an outlet through which fuel gas or air after the reaction is discharged. In one embodiment, the fuel passage and the inlets and outlets of the air passage may be located on one side of the fuel cell module 1100, for example, the side where the connection plate 1200 is disposed.

The fuel cell modules 1100 may be arranged at equal intervals along the virtual circle. 3 shows that five fuel cell modules are arranged, the number of the fuel cell modules 1100 may be adjusted according to the required output.

The connection plate 1200 may be disposed on one side of the fuel cell modules 1100. In an embodiment, the connection plate 1200 may be disposed under the fuel cell modules 1100 to support the fuel cell modules 1100. In this case, the fuel cell modules 1100 The inlet and outlet of the fuel passage and the inlet and outlet of the air passage may be located on the lower surface of the fuel cell modules 1100. In another embodiment, the connection plate 1200 may be disposed above the fuel cell modules 1100, and in this case, the inlet and the outlet of the fuel passage of the fuel cell modules 1100 and the The inlet and the outlet of the air passage may be located on the upper surfaces of the fuel cell modules 1100.

In one embodiment, the connecting plate 1200 is a first fuel through hole and a second fuel through hole communicated with the inlet and the outlet of the fuel passage, respectively, and first air communicated with the inlet and the outlet of the air passage, respectively. It may include a through hole and a second air through hole.

Hereinafter, for convenience of description, as shown in FIG. 3, the connection plate 1200 is disposed below the fuel cell modules 1100 as an example.

The first gas distribution module 1300 and the second gas distribution module 1400 may have the same structure as the gas distribution module 100 for the fuel cell system described with reference to FIGS. 1 and 2, respectively. Therefore, hereinafter, detailed descriptions related to the first gas distribution module 1300 and the second gas distribution module 1400 will be omitted.

The first gas distribution module 1300 may be disposed under the connection plate 1200, and the second gas distribution module 1400 may be disposed under the first gas distribution module 1300. . For example, the second gas distribution module 1400 may have a center axis of the first chamber of the first gas distribution module 1300 and a center axis of the first chamber of the second gas distribution module 1400. It may be disposed below the first gas distribution module 1300.

One of the first gas distribution module 1300 and the second gas distribution module 1400 may be a fuel gas distribution module for uniformly supplying fuel gas to the fuel cell modules 1100, and the other is It may be an air distribution module for uniformly supplying air to the fuel cell modules 1100.

In one embodiment, when the first gas distribution module 1300 is the fuel gas distribution module, the first gas pipe 130 of the first gas distribution module 1300 is connected to a reformer (not shown) to reform. The supplied fuel gas may be supplied to the first internal space 11 of the first chamber 110 of the first gas distribution module 1300, and the second gas pipes 140 may be connected to the connection plate 1200. The first fuel through hole may be connected to the fuel flow path inlets of the fuel cell modules 1100, respectively, and the third gas pipe 150 may be connected through the second fuel through hole of the connection plate 1200. It may be connected to fuel flow path outlets of the fuel cell modules 1100. When the second gas distribution module 1400 is the air distribution module, the first gas pipe 130 of the second gas distribution module 1400 is connected to an external air source (not shown) to supply air to the air. 2 may be supplied to the first inner space 11 of the first chamber 110 of the gas distribution module 1400, and the second gas pipes 140 may pass through the first air through hole of the connection plate 1200. Respectively connected to the air flow path inlets of the fuel cell modules 1100, and the third gas pipe 150 is connected to the fuel cell modules 1100 through a second air through hole of the connection plate 1200. May be connected to the air flow path outlets.

Meanwhile, although the fuel cell system 1000 according to the exemplary embodiment of the present invention has been described as including both the fuel gas distribution module and the air distribution module, the fuel cell system 1000 according to the embodiment of the present invention is the fuel gas. It may include only one of the distribution module and the air distribution module. For example, the fuel cell system 1000 according to the embodiment of the present invention may include only an air distribution module, and fuel gas may be supplied to the fuel cell modules 1100 in the same manner as in the related art. In this case, the air distribution module may be disposed at the position of the first gas distribution module 1300 shown in FIG. 3.

The fuel cell system 1000 according to an exemplary embodiment of the present invention may further include

current collector members

1500A and 1500B for electrically connecting the fuel cell modules 1100, and FIG. 4 illustrates one embodiment of the current collector member. It is a perspective view for demonstrating an example.

Referring to FIG. 4 along with FIG. 3, the

current collectors

1500A and 1500B may include the first current collector 1500A and the fuel cell modules 1100 electrically connected to negative terminals of the fuel cell modules 1100. It may include a second current collector 1500B electrically connected to the positive terminal of the ().

In the fuel cell modules 1100, the negative electrode terminals may be formed to protrude from upper edges of the fuel cell modules 1100, and the positive electrode terminals may be formed from lower edges of the fuel cell modules 1100. It may be formed to protrude.

The first current collector 1500A extends from the first current collecting terminal 1510A and the first current collecting terminal 1510A disposed at the center of the imaginary circle where the fuel cell modules 1100 are arranged to extend the fuel cell. The first contact branches 1520A may be electrically connected to the negative terminals of the modules 1100, respectively. In this case, the first contact branches 1520A may be made of the same material so as to have the same or similar electrical resistance. , Thickness, width and length.

The second current collector 1500B includes a second current collector terminal 1510B and a second current collector disposed at a center of a virtual circle in which the fuel cell modules 1100 are arranged among the lower parts of the first current collector terminal 1510A. Second contact branches 1520B extending from a current collecting terminal 1510B and electrically connected to positive terminals of the fuel cell modules 1100, respectively, wherein the second contact branches 1520B are included. ) May have the same material, thickness, width and length so that the electrical resistance is the same or similar.

Although the detailed description of the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described later. It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

[Description of the code]

100: gas distribution module 110: first chamber

120: second chamber 130: first gas pipe

140: second gas pipes 150: third gas pipe

160: fourth gas pipe 170: branch plate

1000: fuel cell system 1100: fuel cell module

1200: connecting plate 1300: first gas distribution module

1400: second gas distribution module

Claims

In the gas distribution module for supplying a reactive gas to a plurality of fuel cell modules,

A first chamber including a first partition wall forming a first internal space;

A second chamber including a second partition wall forming a second interior space surrounding the first interior space;

A first gas pipe connected to the first internal space and supplying the reaction gas to the first internal space;

A plurality of second gas pipes connecting the first internal space to the fuel cell modules and supplying the reaction gas to the fuel cell modules, respectively;

A third gas pipe connected to the second internal space and configured to receive exhaust gas discharged from the fuel cell modules and supply the exhaust gas to the second internal space; And

And a fourth gas pipe connected to the second internal space at a position spaced apart from the third gas pipe and discharging the exhaust gas from the second internal space.
The method of claim 1,

The first partition wall includes a first bottom portion having a circular or regular polygonal shape, a first side wall portion extending upward from an edge portion of the first bottom portion, and a first cover portion sealing the opened upper end portion of the first side wall portion; ,

The second partition wall includes a second sidewall portion disposed to surround the first sidewall portion in a state spaced apart from the first sidewall portion, and extends from a lower end portion of the second sidewall portion to the first sidewall portion to extend the second inner space. And a second cover part for sealing the lower end of the second cover part and extending from the upper end of the second side wall part to the first side wall part to seal the upper end of the second inner space. Gas distribution module for cell system.
The method of claim 1,

The height of the second side wall portion is a gas distribution module for a fuel cell system, characterized in that more than 1/2 of the height of the first side wall portion.
The method of claim 1,

The plurality of fuel cell modules include N fuel cell modules arranged at equal intervals from each other along an imaginary circle,

The second gas pipes include N pipes extending radially from the first side wall part with respect to the central axis of the first inner space passing through the center of the imaginary circle.

The length of the N pipes, characterized in that the same, the gas distribution module for a fuel cell system.
The method of claim 1,

The reaction gas is a hydrocarbon fuel gas,

And the second gas pipes are respectively connected to the fuel flow paths in the fuel cell modules.
The method of claim 5,

The third gas pipe is connected to an outlet of a fuel flow path inside the fuel cell modules, and supplies exhaust fuel gas discharged from the fuel cell modules to the second internal space. Distribution module.
The method of claim 1,

The reaction gas is air containing oxygen,

And the second gas pipes are respectively connected to the fuel flow paths in the fuel cell modules.
The method of claim 7, wherein

The third gas pipe is connected to an outlet of an air flow path inside the fuel cell modules, and supplies air discharged from the fuel cell modules to the second internal space, a gas distribution module for a fuel cell system. .
The method of claim 1,

And a branch plate disposed in the first inner space to divide the first inner space into a first sub space and a second sub space, and through-holes through which the reaction gas moves.

The first gas pipe is connected to the first sub space,

The gas distribution module for a fuel cell system, characterized in that the second gas pipes are connected to the second sub space.
The method of claim 3,

The branch plate comprises a central region of a first diameter and an edge region surrounding the central region,

The through-holes are formed in the edge region, the gas distribution module for a fuel cell system.
A plurality of fuel cell modules arranged at equal intervals along an imaginary circle;

A first fuel through hole and a second fuel through hole which are disposed under the fuel cell module and communicate with the inlet and the outlet of the fuel flow paths, respectively; A connection plate having a first air through hole and a second air through hole formed therein; And

A first gas distribution module disposed under the connection plate and supplying air to the fuel cell modules,

The first gas distribution module,

A first chamber including a first partition wall passing through a center of the virtual circle and forming a first inner space having a first central axis perpendicular to the connection plate;

A second chamber including a second partition wall forming a second interior space surrounding the first interior space;

A first gas pipe connected to the first internal space and supplying air supplied from an external air source to the first internal space;

A plurality of second gas pipes connecting the first internal space and the first air through holes to supply the air to the fuel cell modules;

A third gas pipe connecting the second internal space and the second air through holes and supplying exhaust air discharged from the fuel cell modules to the second internal space; And

And a fourth gas pipe connected to the second internal space at a position spaced apart from the third gas pipe and discharging the exhaust air from the second internal space.
The method of claim 11,

Further comprising a second gas distribution module disposed below the first gas distribution module,

The second gas distribution module,

A third chamber including a third partition wall forming a third internal space having the same central axis as the first central axis, the third chamber being disposed below the first chamber;

A fourth chamber including a fourth partition wall forming a fourth inner space surrounding the third inner space;

A fifth gas pipe connecting the third internal space and a reformer and supplying the fuel gas supplied from the reformer to the third internal space;

A plurality of sixth gas pipes connecting the third internal space and the first fuel through holes to supply the fuel gas to the fuel cell modules;

A seventh gas pipe connecting the fourth internal space and the second fuel through holes and supplying the exhaust fuel gas discharged from the fuel cell modules to the fourth internal space; And

And an eighth gas pipe connected to the fourth internal space at a position spaced apart from the seventh gas pipe and discharging the exhaust fuel gas from the fourth internal space.
The method of claim 11,

Further comprising a current collector for electrically connecting the fuel cell modules,

The current collector member,

A first current collector including a first current collector terminal and first contact branches extending from the first current collector terminal and electrically connected to the negative terminals of the fuel cell modules, respectively, and having first lengths and thicknesses that are the same; And

Second contact terminals disposed under the first current collecting terminal and second contact branches extending from the second current collecting terminal and electrically connected to the positive terminals of the fuel cell modules, respectively, and having the same length, thickness, and width as each other; A fuel cell system, characterized in that it comprises a second current collector comprising a.