KR102346472B1 - Channel member for fuel cell separator and cell for fuel cell including the same - Google Patents

Abstract

The present invention relates to a flow path member for a fuel cell separator, which has a mesh structure, is disposed on a fuel cell separator, and has a shape that protrudes from the separator toward the gas diffusion layer to guide the flow of the fluid toward the gas diffusion layer. And, it is characterized in that it has a mesh structure and is formed continuously with the reaction reinforcing mesh portion, and includes a flow velocity gradient mesh portion having a curved surface and contacting the gas diffusion layer.

Description

A flow path member for a fuel cell separator and a fuel cell cell including the same

The present invention relates to a flow path member for a fuel cell separator and a fuel cell cell including the same, and more particularly, to a fuel cell flow path member for realizing a reaction activation of a fuel cell and a fuel cell cell including the same.

In general, a fuel cell cell has a structure in which a membrane electrode assembly (MEA), a gas diffusion layer (GDL), a gasket, and a separator are sequentially stacked. The fuel cell stack has a structure in which hundreds of unit cells each having a structure in which a gas diffusion layer, a gasket, and a separator are stacked on both sides of a membrane electrode assembly are stacked.

In recent years, in order to improve the performance of fuel cells for vehicles while simultaneously improving durability and productivity, attempts are made to apply the supply, flow, and discharge routes of the reaction fluid on the anode separator and the cathode separator in various embodiments. have. In addition, in the case of the cathode separator, an attempt has been made to apply a porous flow path in order to improve the reactivity between the reaction fluid and the gas diffusion layer.

The background technology of the present invention is disclosed in Korean Patent Registration Publication No. 1856330 (registration of 2018.05.02, title of invention: fuel cell structure).

An object of the present invention is to provide a flow path member for a fuel cell separator having a porous three-dimensional structure capable of further improving the reactivity between a fluid and a gas diffusion layer, and a fuel cell cell including the same.

The flow path member for a fuel cell separator according to the present invention has a mesh structure and is disposed on the fuel cell separator, and a reaction-reinforced mesh portion having a shape protruding from the separator toward the gas diffusion layer to guide the flow of the fluid toward the gas diffusion layer. ; and a flow velocity gradient mesh portion having a mesh structure and continuously formed with the reaction reinforcing mesh portion, having a curved curved surface and contacting the gas diffusion layer.

The present invention, has a mesh structure and is formed continuously with the flow rate gradient mesh portion, the distributed support mesh portion having a shape recessed toward the separation plate; and a cushion support portion having a mesh structure and continuously formed with the dispersion support mesh portion and connected to the reaction reinforcing mesh portion by forming a concave curved surface toward the separation plate.

The reaction reinforcing mesh portion, the flow rate gradient mesh portion, the dispersion support mesh portion, and the cushion support portion are curved surfaces having a '∩' cross-sectional shape, and a curved surface having a '∪' cross-sectional shape are the reaction reinforcement mesh parts. It is characterized in that it has a structure continuously connected alternately along the arrangement direction.

The flow rate gradient mesh portion has a convex shape toward the gas diffusion layer and is disposed along the extension direction of the reaction reinforcing mesh portion, the flow rate reduction gradient portion in contact with the gas diffusion layer; and a flow velocity increasing gradient part having a concave shape toward the separating plate and continuously formed between the flow velocity decreasing gradient parts.

The flow velocity gradient mesh portion is characterized in that it has a structure in which a curved surface having a '∩' cross-sectional shape and a curved surface having a '∪' cross-sectional shape are alternately and continuously connected along the extension direction of the reaction reinforcing mesh part.

A fuel cell cell according to the present invention includes: a first separator disposed on one side of a membrane electrode assembly with a first gas diffusion layer interposed therebetween; a second separator disposed on the other side of the membrane electrode assembly with a second gas diffusion layer interposed therebetween; and a flow path member disposed on one surface of the first separator facing the first gas diffusion layer, wherein the flow path member has a mesh structure and is disposed on the first separator, and controls the flow of the fluid. a reaction reinforcing mesh portion having a shape protruding from the first separator toward the gas diffusion layer to guide it toward the first gas diffusion layer; a flow velocity gradient mesh portion having a mesh structure, formed continuously with the reaction reinforcement mesh portion, having a curved curved surface and contacting the gas diffusion layer; Distributed support mesh portion having a mesh structure and formed continuously with the flow velocity gradient mesh portion, and having a shape recessed toward the separation plate; and a cushion support part having a mesh structure and continuously formed with the dispersion support mesh part and connected to the reaction reinforcement mesh part by forming a concave curved surface toward the separating plate.

The second separator may include a separator; a plate surface passage portion formed on one surface of the separating plate portion, forming a passage through which a fluid can flow, and in which the passage member is disposed; an inlet hole formed to pass through the separation plate portion, disposed on one side of the plate surface passage portion, and forming a passage through which fluid flows into the plate surface passage portion; and a discharge hole formed to pass through the separation plate portion, disposed on the other side of the plate surface passage portion, and forming a passage through which the fluid on the plate surface passage portion is discharged.

The separation plate portion is formed to protrude toward the second gas diffusion layer, is formed to extend in an extending direction of the reaction reinforcement mesh portion, and a protruding bent portion in contact with the flow rate gradient mesh portion; And it is alternately arranged between the protruding bent portion, the depression bent portion in contact with the cushion support portion; characterized in that it comprises a.

A flow path member for a fuel cell separator according to the present invention and a fuel cell cell including the same include a reaction reinforcing mesh portion having a shape protruding from the separator toward a gas diffusion layer, and a flow velocity gradient mesh portion having a curved surface and contacting the gas diffusion layer has a three-dimensional three-dimensional structure.

Accordingly, the second fluid not only has fluidity in the lateral direction between the first separator and the second gas diffusion layer, but also has fluidity in the longitudinal direction toward the second gas diffusion layer due to the flow path member in a complex manner. The reaction with the second gas diffusion layer may be performed with higher efficiency.

In particular, since the reaction-reinforced mesh portion has a shape that protrudes from the second separator toward the second gas diffusion layer, the second fluid to pass through the reaction-reinforced mesh portion can be clearly guided toward the second gas diffusion layer. Accordingly, the reaction between the second fluid and the second gas diffusion layer may be more stable and highly efficient.

In addition, as the flow velocity gradient mesh portion in contact with the second gas diffusion layer has a continuous curved shape without corners, damage to the second gas diffusion layer or flow path member due to the contact pressure between the second gas diffusion layer and the flow velocity gradient mesh portion is prevented can do.

In addition, as the flow path member has a mesh structure, when water droplets are generated and introduced between the second separator plate and the second gas diffusion layer, the second fluid is blocked by the water droplets and does not retreat in the opposite direction to the moving direction, Since the water droplets are dispersed and flowed around the water droplets while pushing the water droplets in the flow direction, water discharge can be performed smoothly.

In addition, when the flow velocity gradient mesh portion is formed to have a curved surface having a portion relatively close to and spaced apart from the second gas diffusion layer, the second fluid increases and slows the flow rate while continuously having a change in the flow direction. It flows in the flow direction, and a minute vibration may be generated due to the flow velocity gradient of the second fluid in a state in which a portion having a relatively high speed and a portion having a relatively low speed are mixed. Water discharge can be made more smoothly by such fine vibrations.

1 is an exploded perspective view schematically illustrating a fuel cell stack according to an embodiment of the present invention.
2 is an exploded perspective view schematically illustrating an end plate for a fuel cell according to an embodiment of the present invention.
3 is an exploded perspective view schematically illustrating a first plate part according to an embodiment of the present invention.
4 is a conceptual diagram illustrating the flow of a fluid on the first plate part according to an embodiment of the present invention.
5 is an exploded perspective view schematically illustrating a second plate part according to an embodiment of the present invention.
6 is a conceptual diagram illustrating the flow of a fluid on a second plate part according to an embodiment of the present invention.
7 is an exploded perspective view schematically illustrating a third plate part according to an embodiment of the present invention.
8 is a conceptual diagram illustrating the flow of a fluid on a third plate part according to an embodiment of the present invention.
9 is a cross-sectional view taken along line A-A' of FIG. 7 .
10 is a cross-sectional view taken along line B-B' of FIG. 7 .
11 is a conceptual diagram illustrating the flow of a fluid on an end plate for a fuel cell according to an embodiment of the present invention.
12 is an exploded perspective view of a main part on a plane side schematically illustrating a fuel cell cell according to an embodiment of the present invention.
13 is an exploded perspective view of a main part of a bottom side schematically illustrating a fuel cell cell according to an embodiment of the present invention.
14 is an exploded perspective view schematically showing a first separator according to an embodiment of the present invention.
15 is an enlarged view of part C of FIG. 12 .
FIG. 16 is an enlarged view of part D of FIG. 13 .
17 is an exploded perspective view schematically showing a second separator according to an embodiment of the present invention.
18 is an enlarged view of part E of FIG. 13 .
19 is a schematic plan view illustrating the flow of a fluid in a fuel cell cell according to an embodiment of the present invention.
20 is a bottom-side conceptual diagram illustrating the flow of a fluid on a cell for a fuel cell according to an embodiment of the present invention.
21 is a perspective view schematically showing a flow path member for a fuel cell according to an embodiment of the present invention.
22 is an enlarged view of part F of FIG. 21 .
23 is a side view of a main part in the x-direction side schematically showing a flow path member for a fuel cell according to an embodiment of the present invention.
24 is a conceptual diagram illustrating the flow of a fluid by a flow path member for a fuel cell according to an embodiment of the present invention.
25 is a y-direction side view schematically illustrating a flow path member for a fuel cell according to an embodiment of the present invention.
26 is a perspective view illustrating a state in which a flow path member for a fuel cell is installed on a second separator according to an embodiment of the present invention.
27 is a cross-sectional view of a main part of FIG. 26 .

Hereinafter, an embodiment of a flow path member for a fuel cell separator and a fuel cell including the same according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is an exploded perspective view schematically illustrating a fuel cell stack according to an embodiment of the present invention.

Referring to FIG. 1 , in a fuel cell stack according to an embodiment of the present invention, a plurality of unit cells 4 are stacked in a vertical direction (z direction), and a pair of ends are disposed on the upper and lower sides thereof. It has a structure in which the plate 1 is disposed. A plurality of unit cells 4 disposed therebetween by a pair of upper and lower end plates 1 are bound in a predetermined arrangement.

The end plate 1 according to an embodiment of the present invention includes a first end plate 2 disposed above the cell 4 and a second end plate 4 disposed below the cell 4 . do. The first end plate 2 and the second end plate 4 are coupled to each other by fastening means (not shown) with a plurality of unit cells 4 interposed therebetween, and the first end plate 2 and the second end plate 2 are connected to each other. A plurality of holes (reference numerals not marked) for such fastening are formed on the plate 4 .

Fluid is supplied to the cell 4 through the first end plate 2 and the fluid that has passed through the cell 4 is discharged. It is supplied to a plurality of locations on the plate 1, or the fluid discharged from a plurality of locations is combined and discharged through a single path.

In general, a plurality of fluids, more specifically, three fluids including the first fluid 91 , the second fluid 92 , and the third fluid 93 are commonly used in the fuel cell. The common distributor has a complex layered structure in order to minimize the volume while avoiding the interference between the pipes that guide each fluid. A fuel such as hydrogen, methane, nitrogen, reformed gas, etc. may be applied as the first fluid 91 , and an oxidizing agent such as air or oxygen may be applied as the second fluid 92 . In addition, cooling water may be applied as the third fluid 93 .

Conventionally, a common distributor with a complex structure according to the specifications of the end plate 1 must be separately manufactured, or the end plate 1 must be manufactured and assembled according to the specifications of the common distributor. There was a problem. In addition, since the common distributor is additionally coupled to the fuel cell stack, there is a problem in that space efficiency is reduced when disposing in a limited space such as an engine room of a vehicle.

In the first end plate 2 according to an embodiment of the present invention, each of a plurality of fluids can be supplied and discharged to and from the outside through one inlet port and an outlet port, and the flow of the fluid therein is provided at a plurality of locations. It has a structure in which a plurality of flow passages having a diverge or converge form are formed.

That is, the first end plate 2 according to an embodiment of the present invention has a structure including an existing common distributor, or in other words, a structure capable of implementing the function of the existing common distributor. Accordingly, when the first end plate 2 according to an embodiment of the present invention is applied, the installation of the common distributor can be omitted, thereby improving the productivity of the fuel cell stack, reducing the unit cost, and improving the space efficiency.

2 is an exploded perspective view schematically illustrating an end plate for a fuel cell according to an embodiment of the present invention.

1 and 2 , the first end plate 2 according to an embodiment of the present invention includes a plate body 21 , a first flow passage 25 , a second flow passage 26 , and a third It includes a flow path part 27 , a first gasket part 28 , and a second gasket part 29 .

The plate body part 21 is a device part constituting the framework of the first end plate 2 , and a hole part for forming the first flow path part 25 , the second flow path part 26 , and the third flow path part 27 as a whole. It has a structure in which a plurality of plates having grooves and grooves formed thereon are stacked in the vertical direction (z-direction). Each of the plates has a rectangular planar shape capable of covering the cell 4 having a dual cell structure from the upper side, and is stacked in the thickness direction (z direction), and accordingly, the plate body 21 is the overall shape of the rectangular block. to have a shape

The first flow passage 25 is a space portion forming a flow path of the first fluid 91 and is formed to penetrate the plate body 21 in the vertical direction. Among the first flow passages 25 , one passage through which the first fluid 91 is introduced and one passage through which the first fluid 91 is discharged are formed, and the flow of the first fluid 91 is branched or merged in the middle portion. A first branch guide 252 having a

The second flow passage 26 is a space portion forming a flow path of the second fluid 92 , and is formed to penetrate the plate body 21 in the vertical direction, and is disposed to be partitioned from the first flow passage 25 . Of the second flow passage 26 , one passage through which the second fluid 92 is introduced and one passage through which the second fluid 92 is discharged are formed, and the flow of the second fluid 92 is branched or merged in the middle portion. A second branch guide 264 having a

The third flow path portion 27 is a space portion constituting the flow path of the third fluid 93, and is formed to penetrate the plate body 21 in the vertical direction, and includes a first flow path portion 25, a second flow passage portion ( 26) and arranged separately. Of the third flow path portion 27, one passage is formed for the inflow of the third fluid 93 and one passage through which the discharge is made, and in the middle portion, the flow of the third fluid 93 is branched. The third branch guide 272 and the fourth branch guide 275 having a shape in which the flow of the third fluid 93 is combined is formed.

More specifically, the plate body part 21 according to an embodiment of the present invention has a structure in which the first plate part 22, the second plate part 23, and the third plate part 24 are stacked. . The first flow path part 25 is formed to continuously penetrate the first plate part 22 , the second plate part 23 , and the third plate part 24 , and the first plate part 22 and the second plate part 24 . It has a structure in which the first branch guide 252 is formed between the parts 23 .

The second flow path part 26 is formed to continuously penetrate the first plate part 22 , the second plate part 23 , and the third plate part 24 , and the first plate part 22 and the second plate part 24 . It has a structure in which the second branch guide 264 is formed between the parts 23 .

The third flow path part 27 is formed to continuously penetrate the first plate part 22, the second plate part 23, and the third plate part 24, and the second plate part 23 and the third plate part 24 are formed. A third branch guide part 272 for guiding the flow of the third fluid 93 to be branched between the parts 24, and a fourth branch guide part 275 for guiding the flow of the third fluid 93 to be collected. has a formed structure.

The first gasket part 28 is a device for sealing the space between the first plate part 22 and the second plate part 23, and includes an elastic material capable of sealing a fluid, such as rubber. The first gasket portion 28 is disposed between the first plate portion 22 and the second plate portion 23 , and includes a first passage portion 25 , a second passage portion 26 , and a third passage portion ( 27) is formed to extend along the edge.

Among the second plate parts 23, on the upper surface part facing the first plate part 22, a gasket coupling part (not shown) to which the first gasket part 28 is fitted and coupled may be formed in the structure of a groove part, The first gasket part 28 may be coupled to protrude upward with a part (lower part) accommodated in the gasket coupling part formed on the second plate part 23 . At this time, the upper portion of the protruding first gasket portion 28 is in close contact with the lower surface portion of the first plate portion 22 .

The second gasket part 29 is a device part for sealing the space between the second plate part 23 and the third plate part 24, and includes an elastic material that can seal the fluid, such as rubber. The second gasket part 29 is disposed between the second plate part 23 and the third plate part 24 , and includes a first flow path part 25 , a second flow path part 26 , and a third flow path part ( 27) is formed to extend along the edge.

On the upper surface of the third plate part 24 facing the second plate part 23, a gasket coupling part (not shown) to which the second gasket part 29 is fitted and coupled may be formed in the structure of a groove part, The second gasket part 29 may be coupled to protrude upward while a part (lower part) is accommodated in the gasket coupling part formed on the third plate part 24 . At this time, the upper portion of the protruding second gasket portion 29 is in close contact with the bottom surface of the second plate portion 23 .

3 is an exploded perspective view schematically illustrating a first plate part according to an embodiment of the present invention, and FIG. 4 is a conceptual diagram illustrating the flow of a fluid on the first plate part according to an embodiment of the present invention. to be.

3 and 4 , the first plate part 22 according to an embodiment of the present invention includes a first body part 221 and a first passage hole part 222 .

The first body portion 221 is a device portion constituting the rigid frame of the first plate portion 22, and has the shape of a plate as a whole. The first passage hole 222 is a device for forming the first passage 25 , the second passage 26 , and the third passage 27 , and penetrates vertically on the first body portion 221 . formed to be Six first passage hole portions 222 corresponding to both ends of the first passage portion 25 , both ends of the second passage portion 26 , and both ends of the third passage portion 27 are formed.

More specifically, in each of the six first passage hole portions 222 , the first passage portion 25 has a first inlet portion 251 , a first discharge portion 255 , and a second inlet portion of the second passage portion 26 . The portion 261 , the second discharge portion 265 , and the third inlet portion 271 and the third discharge portion 276 of the third flow passage portion 27 are formed. At this time, each of the first passage holes 222 is a pipe (not shown) for supplying and discharging the first fluid 91 , the second fluid 92 , and the third fluid 93 to the inside and outside of the fuel cell stack. It functions as a port to which it is coupled.

5 is an exploded perspective view schematically illustrating a second plate part according to an embodiment of the present invention, and FIG. 6 is a conceptual diagram illustrating the flow of fluid on the second plate part according to an embodiment of the present invention. to be.

5 and 6 , the second plate part 23 according to an embodiment of the present invention includes a second body part 231 , a first branch groove part 232 , a second branch groove part 233 , and a first branch groove part 233 . It includes a second passage hole portion 234 and a second dividing wall portion 235 .

The second body part 231 is a device part constituting a rigid frame of the second plate part 23, and has the shape of a plate having a rectangular upper surface part and a lower surface part corresponding to the first body part 221 as a whole, and the first body part It is arranged to be stacked on the lower side of the part 221 . A first gasket part 28 for sealing the space between the first body part 221 and the second body part 231 may be coupled to the upper surface of the second body part 231 .

The first branch groove part 232 is a device for forming the first branch guide part 252 , and is formed to be recessed on the upper surface part facing the bottom surface part of the first body part 221 of the second body part 231 . do. The first branch groove portion 232 communicates with the first passage hole portion 222 constituting the first inlet portion 251 of the first passage portion 25 among the plurality of first passage hole portions 222 . The first branch groove portion 232 is disposed to extend in the left-right direction (y-direction) on the front side (+x-direction side) of the second body portion 231 in the front-rear direction (x-direction).

The second branch groove portion 233 is a device for forming the second branch guide portion 264 , and is formed to be recessed on the upper surface portion facing the bottom surface portion of the first body portion 221 of the second body portion 231 . do. The second branch groove portion 233 communicates with the first passage hole portion 222 constituting the second discharge portion 265 of the second passage portion 26 among the plurality of first passage hole portions 222 . The second branch groove portion 233 is disposed to extend in the left-right direction (y-direction) on the rear side (-x-direction side) of the second body portion 231 in the front-rear direction (x-direction).

The second passage hole part 234 is a device for forming the first flow passage part 25 , the second flow passage part 26 , and the third flow passage part 27 , and penetrates vertically on the second body part 231 . formed to be A portion of the second passage hole portion 234 is formed to extend in the front-rear direction at both ends of the second body portion 231 in the left and right directions, and communicates with the first branch groove portion 232 and the second branch groove portion 233 .

The second passage hole portion 234 communicating with the first branch groove portion 232 can be utilized as the first inlet pass portion 253 , and the second passage hole portion 234 communicating with the second branch groove portion 233 is the second passage hole portion 234 . It can be utilized as the 2 discharge pass part 263. In addition, the other part of the second flow path hole 234 is the first discharge pass part 254 of the first flow path part 25 , and another part is the second inlet pass part 262 of the second flow path part 26 . ) can be used as

The second passage hole portion 234 forming the first discharge pass portion 254 is disposed to extend continuously in the vertical direction with the first passage hole portion 222 forming the first discharge portion 255 . The second passage hole portion 234 forming the second inlet pass portion 262 is disposed to extend continuously in the vertical direction with the first passage hole portion 222 forming the second inlet portion 261 .

The remaining part of the second passage hole portion 234 forms a third inlet portion 271 and a third discharge portion 276 of the third passage portion 27 . The second passage hole portion 234 forming the third passage portion 27 is disposed to extend continuously in the vertical direction with the first passage hole portion 222 forming the third oil passage portion 27 .

The second passage hole portion 234 constituting the third inlet portion 271 is disposed on the front and right portions of the second body portion 231 , more specifically, in front of the first branch groove portion 232 . The second passage hole portion 234 constituting the third discharge portion 276 is disposed on the rear portion and right portion of the second body portion 231 , more specifically, behind the second branch groove portion 233 .

The second dividing wall portion 235 is a device for dividing the second passage hole portion 234 into a plurality, and is formed to cross the second passage hole portion 234 having a shape extending in the front-rear direction in the left and right directions. A plurality of second passage hole portions 234 are arranged in the front-rear direction by the second dividing wall portion 235 .

When three second dividing wall portions 235 are formed, the second passage hole portion 234 is divided into four, and among them, the frontmost one communicating with the first branch groove portion 232 is the first passage portion 25 . can be used as the first inlet pass portion 253 of (263) can be used.

7 is an exploded perspective view schematically illustrating a third plate part according to an embodiment of the present invention, and FIG. 8 is a conceptual diagram illustrating the flow of fluid on the third plate part according to an embodiment of the present invention. 9 is a cross-sectional view taken along line A-A' of FIG. 7 , and FIG. 10 is a cross-sectional view taken along line B-B' of FIG. 7 .

7 to 11 , the third plate part 24 according to an embodiment of the present invention includes a third body part 241 , a third branch groove part 242 , a fourth branch groove part 243 , and a second branch groove part 243 . It includes a three-channel hole portion 244 , a third dividing wall portion 245 , and a communication groove portion 246 .

The third body part 241 is a device part forming a rigid frame of the third plate part 24, and a plate material having a rectangular upper surface and a lower surface corresponding to the first body part 221 and the second body part 231 as a whole. has a shape of and is disposed to be stacked on the lower side of the second body portion 231 . A second gasket part 29 for airtightening between the second body part 231 and the third body part 241 may be coupled to the upper surface of the third body part 241 .

The third branch groove part 242 is a device for forming the third branch guide part 272 , and is formed to be recessed on the upper surface part facing the bottom surface part of the second body part 231 of the third body part 241 . do. The third branch groove portion 242 communicates with a portion constituting the third inlet portion 271 of the third passage portion 27 among the second passage hole portions 234 . The third branch groove portion 242 is disposed to extend in the left and right directions on the front portion of the third body portion 241 .

The fourth branch groove part 243 is a device for forming the fourth branch guide part 275 and is formed to be recessed on the upper surface part facing the bottom surface part of the second body part 231 of the third body part 241 . do. The fourth branch groove portion 243 communicates with a portion constituting the third discharge portion 276 of the third passage portion 27 among the second passage hole portions 234 . The fourth branch groove portion 243 is disposed to extend in the left and right directions on the rear portion of the third body portion 241 .

The third passage hole portion 244 is a device portion forming the first passage portion 25 , the second passage portion 26 , and the third passage portion 27 , and penetrates vertically on the third body portion 241 . formed to be A part of the third passage hole portion 244 forms a first inlet pass portion 253 of the first passage portion 25 and a second discharge pass portion 263 of the second passage portion 26, and the first inflow The second passage hole 234 forming the pass portion 253 and the second discharge pass portion 263 is disposed to extend continuously in the vertical direction.

Another part of the third passage hole portion 244 forms the second inlet pass portion 262 and the first discharge pass portion 254 , and forms the second inlet pass portion 262 and the first discharge pass portion 254 . It is arranged to extend continuously in the vertical direction with the second flow passage hole portion 234 to be formed.

Another portion of the third passage hole portion 244 is formed in communication with the lower portion of the third branch groove portion 242, and the other portion of the third passage hole portion 244 is formed in communication with the third passage hole portion 244 and the fourth portion of the third passage hole portion 244 It is formed in communication with the lower portion of the branch groove (243). The third passage hole portion 244 formed to be in communication with the lower portion of the third branch groove portion 242 forms the third inflow pass portion 273 and is formed to communicate with the lower portion of the fourth branch groove portion 243 . The passage hole 244 forms a third discharge pass portion 274 .

The third passage hole 244 forming the third inlet pass portion 273 and the third passage hole 244 forming the third outlet pass portion 274 are respectively a third inlet 271 and a third It is disposed to extend continuously in the vertical direction with the second passage hole 234 forming the discharge portion 276 .

The third dividing wall portion 245 is a device for dividing the third passage hole portion 244 into a plurality, and as shown in FIG. 9 , the third passage hole portion 244 is formed to extend in the front and rear direction and is formed to cross in the left and right directions. Alternatively, as shown in FIG. 10 , it is formed to cross the third passage hole 244 formed to extend in the left-right direction in the front-rear direction. The third dividing wall part 245 has a structure in which a plurality of third dividing wall parts 245 are arranged in the front-rear direction or in the left-right direction by the third dividing wall part 245 .

Referring to FIG. 9 , when three third dividing wall parts 245 are formed on the third passage hole part 244 forming the second inlet pass part 262 and the first discharge pass part 254 , the third The flow path hole 244 is divided into four, of which one of the rearmost one may be used as the first discharge pass portion 254 , and three front side portions may be utilized as the second inlet pass portion 262 .

The communication groove part 246 is a device part that communicates with the space portions on both sides of the third dividing wall part 245 partitioned by the third dividing wall part 245 , and is formed to be recessed in the third passage hole part 244 . By forming the communication groove portion 246 , it is possible to connect the second inflow path portions 262 divided into a plurality by the third dividing wall portion 245 to communicate with each other.

Referring to FIG. 9 , the second fluid 92 introduced from the frontmost side among the three third passage hole portions 244 forming the second inflow path portion 262 is the third dividing wall portion through the communication groove portion 246 . It can pass through the 245 and can be evenly distributed through the three second inflow path portions 262 partitioned in the front and rear directions by the third dividing wall portion 245 to flow toward the cell 4 .

11 is a conceptual diagram illustrating the flow of a fluid on an end plate for a fuel cell according to an embodiment of the present invention.

Referring to FIG. 11 , the first flow path part 25 according to an embodiment of the present invention includes a first inflow part 251 , a first branch guide part 252 , a first inflow pass part 253 , and a first It includes a discharge pass unit 254 and a first discharge unit 255 .

The first inlet portion 251 is formed to penetrate in the thickness direction on the front portion and the left and right middle portion of the first plate portion 22 , and the lower portion communicates with the left and right middle portion of the first branch guide portion 252 . do. The first branch guide part 252 extends between the first plate part 22 and the second plate part 23, more specifically, to the front part of the upper part of the second plate part 23 in the left and right direction. is formed The first inflow path part 253 is formed to penetrate through the second plate part 23 and the third plate part 24 in the thickness direction, and communicates with both ends of the first branch guide part 252 in the left and right directions.

The first discharge pass portion 254 is formed to penetrate in the thickness direction on the rear portion and the left and right middle portions of the second plate portion 23 and the third plate portion 24 . The first discharge part 255 is formed to penetrate through the rear part and the left and right middle part of the first plate part 22 in the thickness direction, and communicates with the first discharge pass part 254 . The first discharge pass unit 254 and the first discharge unit 255 are disposed to be spaced apart from the rear of the first inlet unit 251 , the first branch guide unit 252 , and the first inlet pass unit 253 .

The first fluid 91 flows downwardly toward the cell 4 while continuously passing through the first inlet 251 , the first branch guide 252 and the first inlet pass 253 , and the cell 4 . After passing through the fuel cell stack, it is discharged to the outside of the fuel cell stack while continuously passing through the first discharge pass unit 254 and the first discharge unit 255 .

Referring to FIG. 11 , the second flow path part 26 according to an embodiment of the present invention includes a second inlet part 261 , a second inlet pass part 262 , a second discharge pass part 263 , and a second It includes a branch guide part 264 and a second discharge part 265 .

The second inlet 261 is formed to penetrate in the thickness direction on the front part and the left and right middle part of the first plate part 22 . The second inlet 261 is disposed to be spaced apart from the rear of the first inlet 251 . The second inlet pass portion 262 is formed to penetrate through the second plate portion 23 and the third plate portion 24 in the thickness direction, and communicates with the second inlet portion 261 .

The second discharge pass part 263 is formed to pass through the second plate part 23 and the third plate part 24 in the thickness direction, and communicates with both ends of the second branch guide part 264 in the left and right directions. A plurality (eg, three) of the second discharge pass portion 263 is arranged in the front and rear directions on the left and right sides and the right side of the second plate portion 23 and the third plate portion 24 .

The second branch guide portion 264 extends between the first plate portion 22 and the second plate portion 23 in the left and right direction, more specifically, to the rear portion of the upper portion of the second plate portion 23 . is formed Both left and right ends of the second branch guide 264 communicate with the plurality of second discharge pass portions 263 arranged in the front and rear directions, respectively, and the middle portion communicates with the second discharge portion 265 .

As the second discharge path portion 263 has a shape arranged to extend in the front-rear direction, and the second discharge portion 265 has the shape of a circular through hole, the second branch guide portion 264 is formed at both ends in the left and right directions. It has a shape in which the width in the front-rear direction is gradually reduced toward the middle part side.

The second discharge part 265 is formed to penetrate in the thickness direction on the first plate part 22 and communicates with the middle part in the left and right direction of the second branch guide part 264 . The second discharge pass part 263 , the second branch guide part 264 , and the second discharge part 265 are disposed behind the second inlet part 261 and the second inlet pass part 262 to be spaced apart from each other.

The second fluid 92 flows downwardly toward the cell 4 while continuously passing through the second inlet portion 261 and the second inlet pass portion 262 , and after passing through the cell 4 , the second discharge path It is discharged to the outside of the fuel cell stack while continuously passing through the part 263 , the second branch guide part 264 , and the second discharge part 265 .

Referring to FIG. 11 , the third flow path part 27 according to an embodiment of the present invention includes a third inflow part 271 , a third branch guide part 272 , a third inflow path part 273 , and a third It includes a discharge path unit 274 , a fourth branch guide unit 275 , and a third discharge unit 276 .

The third inlet portion 271 is formed to penetrate in the thickness direction on the front and right portions of the first plate portion 22 and the second plate portion 23 in the thickness direction, and is formed on the upper portion of the third plate portion 24 . It communicates with the right side of the third branch guide 272 .

The third branch guide part 272 extends between the second plate part 23 and the third plate part 24, more specifically, to the front part of the upper part of the third plate part 24 in the left and right direction. is formed The right end of the third branch guide 272 communicates with the third inlet 271 , and the lower portion of the third branch guide communicates with the third inlet pass 273 .

The third inlet pass portion 273 is formed to penetrate through the third plate portion 24 in the thickness direction, and communicates with the lower portion of the third branch guide portion 272 . The third inflow path portion 273 is formed to extend in the left and right direction in parallel with the third branch guide portion 272, and a plurality of portions are divided and arranged in the left and right direction. Accordingly, the third fluid 93 introduced to the right side of the third inflow path part 273 flows to the left along the third inflow path part 273 and is dispersed into a plurality of third inflow path parts 273 . and is brought in

The third discharge pass portion 274 is formed to pass through the third plate portion 24 in the thickness direction, and is formed to communicate with the lower portion of the fourth branch guide portion 275 . The third discharge pass portion 274 is formed to extend in the left and right directions on the rear portion of the third plate portion 24, and a plurality of portions are divided and arranged in the left and right directions.

The fourth branch guide portion 275 is formed to extend in the left and right direction to the rear of the upper portion of the third discharge pass portion 274, and communicate with the upper portion of the third discharge pass portion 274, more specifically, It is formed to be stacked on the upper side of the three-discharge pass portion 274 . Accordingly, the third fluid 93 introduced and dispersed in the left and right directions through the plurality of third discharge path units 274 is merged on the fourth branch guide unit 275 and proceeds toward the third discharge unit 276 . .

The third discharge part 276 is formed to penetrate in the thickness direction on the first plate part 22 and the second plate part 23 , and communicates with the left part of the fourth branch guide part 275 . The third discharge path unit 274 , the fourth branch guide unit 275 , and the third discharge unit 276 are a third inlet unit 271 , a third branch guide unit 272 , and a third inflow path unit 273 . ) is spaced apart from the rear.

The third fluid 93 flows downwardly toward the cell 4 while continuously passing through the third inlet 271 , the third branch guide 272 , and the third inlet pass 273 , and the cell 4 . After passing through the fuel cell stack, it is discharged to the outside of the fuel cell stack while continuously passing through the third discharge pass unit 274 , the fourth branch guide unit 275 , and the third discharge unit 276 .

The first inflow part 251 , the second inflow part 261 , and the third inflow part 271 are disposed on the front part of the first plate part 22 . The first branch guide part 252 extends from the middle part in the left and right direction where the first inlet part 251 is located to the left and right. The second branch guide 264 is disposed to be partitioned from the first branch guide 252 at the rear of the first branch guide 252 , and is formed to extend from both sides in the left and right direction to the middle portion.

The third branch guide 272 is formed to extend in the left and right directions on the front part of the third plate part 24 , and the fourth branch guide part 275 is formed on the rear part of the third plate part 24 in the left and right directions. is formed to extend to The first inlet pass part 253 and the second outlet pass part 263 are arranged to extend in the front and rear directions on both left and right sides of the third plate part 24 , and the third inlet pass part 273 is connected to the left and right sides of the third plate part 24 . Between the first inlet pass part 253 and the second outlet pass part 263 disposed on the right side, in other words, it is disposed in the middle part in the left and right direction of the third plate part 24 .

The first discharge pass part 254 and the second inlet pass part 262 are arranged to extend in the front-rear direction at the middle part of the third plate part 24 in the left-right direction. The third discharge pass unit 274 is spaced apart from the third inflow path unit 273 in the front-rear direction with the first discharge pass unit 254 and the second inflow path unit 262 interposed therebetween, in other words, the second It is disposed behind the first discharge pass portion 254 and the second inlet pass portion 262 . The first discharge unit 255 , the second discharge unit 265 , and the third discharge unit 276 are disposed at a rear portion of the first plate unit 22 .

In the description of the present invention, in the description in relation to the first flow path part 25, the second flow path part 26, and the third flow path part 27, for convenience, the first fluid 91 and the second fluid 92 , The flow direction of the third fluid 93 is specifically set, but this is for understanding purposes only, and is not intended to limit the flow direction of the fluid. On the first flow path part 25 , the second flow path part 26 , and the third flow path part 27 , the fluid may flow in the opposite direction as shown in FIG. 11 .

For example, the first fluid 91 may flow downwardly toward the cell 4 while continuously passing through the first discharge unit 255 and the first discharge pass unit 254 , and the first inflow path unit 253 . ), the first branch guide 252 , and the first inlet 251 may be continuously passed through and discharged to the outside of the fuel cell stack. Similarly, the second fluid 92 may flow downwardly toward the cell 4 while continuously passing through the second discharge unit 265, the second branch guide unit 264, and the second discharge pass unit 263, It may be discharged to the outside of the fuel cell stack while continuously passing through the second inlet pass portion 262 and the second inlet portion 261 .

In addition, the third fluid 93 may flow downward toward the cell 4 while continuously passing through the third discharge unit 276, the fourth branch guide unit 275, and the third discharge pass unit 274, It may be discharged to the outside of the fuel cell stack while continuously passing through the third inlet pass part 273 , the third branch guide part 272 , and the third inlet part 271 .

12 is a planar side exploded perspective view schematically illustrating a fuel cell cell according to an embodiment of the present invention, and FIG. 13 is a bottom side main exploded perspective view schematically illustrating a fuel cell fuel cell according to an embodiment of the present invention. to be.

12 and 13 , a fuel cell cell 4 according to an embodiment of the present invention includes a first separator 6 , a second separator 7 , and a flow path member 8 .

The first separator 6 is disposed below the Membrane-Electrode Assembly (MEA) 5a with a first gas diffusion layer (GDL) 5b interposed therebetween. The first separator 6 has a dual cell structure in which a pair of dual plate parts are arranged in parallel in the lateral direction. The membrane electrode assembly 5a includes a polymer electrolyte membrane capable of moving hydrogen cations (protons), and catalyst layers (air electrode and fuel electrode) coated on both sides of the polymer electrolyte membrane so that hydrogen and oxygen can react.

The second separator 7 is disposed above the membrane electrode assembly 5a with the second gas diffusion layer 5c interposed therebetween. The second separator 7 has a dual cell structure corresponding to the first separator 6 . That is, in the second separator 7 , a pair of dual plate portions having the same and similar size as the first separator 6 are parallel to the pair of dual plate portions constituting the first separator 6 in the same direction. It has a very laid out structure.

A first fluid 91 may flow between the first separator 6 and the first gas diffusion layer 5b, and a second fluid 91 may flow between the second separator 7 and the second gas diffusion layer 5c. 92) can flow. A fuel such as hydrogen, methane, nitrogen, reformed gas, etc. may be applied as the first fluid 91 , and an oxidizing agent such as air or oxygen may be applied as the second fluid 92 .

The flow path member 8 has a porous flow path structure and is disposed on the bottom of the second separator 7 in contact with the second gas diffusion layer 5c, so that the second separator 7 and the second gas diffusion layer 5c are formed. The flow of the second fluid 92 introduced therebetween is guided toward the second gas diffusion layer 5c. Accordingly, the second fluid 92 not only has fluidity in the transverse direction between the second separator 7 and the second gas diffusion layer 5c, but also has fluidity in the second gas diffusion layer ( The fluidity in the longitudinal direction toward 5c) is compounded.

The first separating plate 6 and the second separating plate 7 according to an embodiment of the present invention have a dual cell structure in which a pair of separating plate members are arranged in parallel in the left-right direction or the front-rear direction. Accordingly, it is possible to generate a voltage of 2V, which is twice the conventional 1V, with one unit cell 4 .

The unit cell 4 has a structure in which a first separator 6, a first gas diffusion layer 5b, a membrane electrode assembly 5a, a second gas diffusion layer 5c, and a second separator 7 are stacked. However, when stacking more than 400 cells, there was a problem in that the process of actually stacking the material was repeated 2,000 times, which was a wasteful process. In addition, although an elastic material such as rubber is generally used as a material for the gasket, there has been a problem in that the gasket is structurally unstable as more than 400 cells are stacked.

In implementing the driving voltage of the motor for driving the vehicle, etc. of the first separator 6 and the second separator 7 of the dual cell structure according to an embodiment of the present invention to the same degree, the The number of stacks can be reduced by half. For example, it is possible to reduce the existing stacking of 400 cells or more to 200 cells. Accordingly, fairness can be remarkably improved, and compared to arranging two fuel cell stacks in parallel, the volume can be significantly reduced, so that space utilization can be further improved, and structural stability can also be further improved. .

14 is an exploded perspective view schematically showing a first separator according to an embodiment of the present invention. FIG. 15 is an enlarged view of part C of FIG. 12 , and FIG. 16 is an enlarged view of part D of FIG. 13 .

14 to 16 , the first separating plate 6 according to an embodiment of the present invention includes a first dual plate part 61 , a second dual plate part 67 , and an insulating gasket 68 .

The first dual plate part 61 and the second dual plate part 67 are disposed to be spaced apart from each other in the transverse direction (eg, in the left and right direction). The insulating gasket 68 insulates the first dual plate part 61 and the second dual plate part 67 . The first dual plate part 61 and the second dual plate part 67 are mutually symmetrical with respect to the connection part by the insulating gasket 68, more specifically, the connection gasket part 685 of the insulating gasket 68 as a reference. have

For example, in a state in which the first dual plate part 61 and the second dual plate part 67 are arranged in the left and right directions, that is, the first dual plate part 61 is on the left, and the second dual plate part 67 is on the right In the arranged state, the first dual plate part 61 and the second dual plate part 67 have a symmetrical structure with respect to the connecting gasket part 685 . Accordingly, in the description of the first dual plate part 61 and the second dual plate part 67 hereinafter, the second dual plate part 67 having a structure symmetrical to the first dual plate part 61 is overlapped. A description will be omitted.

By integrally connecting the first dual plate part 61 and the second dual plate part 67 with the insulating gasket 68, the first dual plate part 61 and the second dual plate part 67 are integrated while maintaining the mutual insulation state. Since the first dual plate part 61 and the second dual plate part 67 are manufactured separately from each other, assembling property and structural stability can be further improved compared to the embodiment in which the first dual plate part 61 and the second dual plate part 67 are separately assembled.

The first dual plate part 61 according to an embodiment of the present invention includes a dual plate body part 62 , a first flow path forming part 63 , a common channel forming part 64 , a second flow path forming part 65 , It includes a three-channel forming part 66 .

The dual plate body portion 62 has a plate-like shape having an upper surface portion and a lower surface portion of a generally flat shape. The first flow path forming part 63 is formed on the left side of the dual plate body part 62 , and forms a flow path through which the first fluid 91 and the second fluid 92 can pass in the vertical direction.

The common flow path forming part 64 is formed on the right side of the dual plate body part 62 , and is connected to the common flow path forming part 64 of the second dual plate part 67 by an insulating gasket 68 . Between the common flow path forming part 64 of the first dual plate part 61 and the common flow path forming part 64 of the second dual plate part 67, the first fluid 91 and the second fluid 92 are formed in the vertical direction. A flow path through which it can pass is formed.

The common flow path forming part 64 is at the end of the dual plate body part 62 facing the second dual plate part 67 in a state where the first dual plate part 61 and the second dual plate part 67 are arranged side by side. formed, and the first flow path forming part 63 is formed at an end opposite to the common flow path forming part 64 . Accordingly, the first fluid 91 and the second fluid 92 flow from the first flow path forming unit 63 to the common flow path forming unit 64 or from the common flow path forming unit 64 to the first flow path forming unit. In the flow to (63), it may have a directionality in the left-right direction or diagonal direction on the dual plate body portion (62).

The second flow path forming part 65 is formed at the front end of the dual plate body part 62 and forms a flow path through which the third fluid 93 can pass in the vertical direction. The third flow path forming part 66 is formed at the rear end of the dual plate body part 62 and forms a flow path through which the third fluid 93 can pass in the vertical direction.

The second flow passage forming part 65 and the third flow passage forming part 66 have a shape extending in the left and right directions, and are arranged side by side in the front and rear directions. Accordingly, the third fluid 93 flows from the second flow path forming part 65 to the third flow path forming part 66 or from the third flow path forming part 66 to the second flow path forming part 65 . In this way, it may have a directionality in the front-rear direction on the dual plate body part 62 . The third fluid 93 on the second flow path forming part 65 may flow backward and may be introduced into the third flow path forming part 66 .

14 to 16 , the dual plate body part 62 according to an embodiment of the present invention includes a separator plate part 621 , a plate surface flow path part 624 , an inlet hole part 625 , and a discharge hole part 626 . do.

The separating plate part 621 is a device part constituting the basic frame of the dual plate body part 62, and has the shape of a plate material with a flat upper surface and a lower surface as a whole.

The plate surface flow path part 624 is formed on one surface of the separator plate part 621 facing the first gas diffusion layer 5b. The plate surface flow path part 624 connects the first fluid 91 and the second fluid 92 on the first flow path forming part 63 to the common flow path forming part 64 between the first gas diffusion layer 5b and the first gas diffusion layer 5b. Inducing the first fluid 91 and the second fluid 92 on the common flow path forming unit 64 to the first flow path forming unit 63 is formed.

The inlet hole 625 is a device forming a passage through which the first fluid 91 and the second fluid 92 on the first flow path forming unit 63 or the common flow path forming unit 64 are introduced into the plate surface flow path unit 624 . As a result, it is formed to penetrate through the separation plate portion 621 . The inlet hole 625 is disposed at an end connected to the first flow path forming part 63 or the common flow path forming part 64 among the plate surface flow path parts 624 .

The discharge hole 626 is a device that forms a passage through which the first fluid 91 and the second fluid 92 on the plate surface flow path part 624 are discharged to the first flow path forming unit 63 or the common flow path forming unit 64 . As a result, it is formed to penetrate through the separation plate portion 621 . The discharge hole 626 is disposed at an end connected to the first flow passage forming part 63 or the common flow passage forming part 64 of the plate surface flow passage part 624, and is disposed at a position forming a diagonal line with the inlet hole 625. .

14 to 16 , the first flow path forming part 63 according to an embodiment of the present invention includes a first divided flow path part 631 and a second divided flow path part 632 .

The first divided flow path part 631 is formed in the front part of the dual plate body part 62, and forms a flow path through which the first fluid 91 can pass in the longitudinal direction. The second divided passage portion 632 is formed in the rear portion of the dual plate body portion 62, and forms a passage through which the second fluid 92 can pass in the longitudinal direction. The first divided flow path part 631 and the second divided flow path part 632 have a structure in which they are continuously arranged in the front-rear direction.

14 to 16 , the common flow path forming unit 64 according to an embodiment of the present invention includes a first common divided flow path part 641 and a second common divided flow path part 642 .

The first common divided flow passage portion 641 is formed in the rear portion of the dual plate body portion 62, and forms a passage through which the first fluid 91 can pass in the longitudinal direction. The second common divided flow path part 642 is formed in the front part of the dual plate body part 62, and forms a flow path through which the second fluid 92 can pass in the longitudinal direction. The first shared divided flow path part 641 and the second shared divided flow path part 642 have a structure arranged in succession in the front-rear direction together.

The first divided flow path part 631 is disposed on the left side and the front part of the dual plate body part 62 , and the first common divided flow path part 641 is formed on the right part and the rear part of the dual plate body part 62 . . Accordingly, the first fluid 91 on the first divided flow path part 631 may flow in a diagonal direction of the dual plate body part 62 and may be introduced into the first common divided flow path part 641 .

The second divided flow path part 632 is disposed on the left side and the rear part of the dual plate body part 62 , and the second common divided flow path part 642 is formed on the right part and the front part of the dual plate body part 62 . . Accordingly, the second fluid 92 on the second common divided flow path part 642 flows in a diagonal direction intersecting the flow direction of the first fluid 91 on the dual plate body part 62, and the second divided flow path part ( 632) can be introduced.

14 to 16 , the insulating gasket 68 includes a first insulating gasket part 681 , a second insulating gasket part 682 , a third insulating gasket part 683 , and a fourth insulating gasket part 684 . , and a connecting gasket portion 685 .

The first insulating gasket part 681 is disposed on the upper surface of the first dual plate part 61 facing the first gas diffusion layer 5b. The first insulating gasket part 681 is coupled to the upper surface of the first dual plate part 61 so as to protrude upward, and the dual plate body part 62 and the first flow path forming part 63 constituting the first dual plate part 61 . ), the common passage forming portion 64 , the second passage forming portion 65 , and the third passage forming portion 66 are formed to extend along the edges.

The second insulating gasket part 682 is disposed on the upper surface of the second dual plate part 67 facing the first gas diffusion layer 5b. The second insulating gasket part 682 includes the dual plate body part 62 constituting the second dual plate part 67 , the first flow path forming part 63 , the common channel forming part 64 , and the second flow path forming part 65 . ), is formed to extend along the edge of the third flow path forming part 66 .

The first insulating gasket part 681 and the second insulating gasket part 682 are disposed on the upper surfaces of the first dual plate part 61 and the second dual plate part 67, respectively, and the dual plate body part 62, the first Edges of the flow path forming part 63 , the common flow path forming part 64 , the second flow path forming part 65 , and the third flow path forming part 66 are airtight and partitioned from each other at the same time.

The third insulating gasket part 683 is It is disposed on the bottom surface of the first dual plate portion (61). The third insulating gasket portion 683 of the first separating plate 6 is in contact with the upper surface portion of the second separating plate 7 of the cell 4 disposed below it. In addition, the second insulating gasket portion 682 of the first separation plate 6 of the cell 4 disposed on the lowermost side is in contact with the upper surface portion of the second end plate 4 . The third insulating gasket part 683 according to an embodiment of the present invention is disposed to protrude from the bottom surface of the first dual plate part 61, and the dual plate body part 62, the first flow path forming part 63, and the common part are provided. Edges of the flow path forming part 64 , the second flow path forming part 65 , and the third flow path forming part 66 are hermetically sealed.

The fourth insulating gasket part 684 has a structure symmetrical to the left and right with the third insulating gasket part 683 , and is disposed on the bottom surface of the second dual plate part 67 . The third insulating gasket part 683 and the fourth insulating gasket part 684 are disposed on the bottom surfaces of the first dual plate part 61 and the second dual plate part 67, respectively, and the dual plate body part 62, the first The edges of the flow path forming part 63 , the common flow path forming part 64 , the second flow path forming part 65 , and the third flow path forming part 66 are airtight and selectively partitioned from each other.

The connecting gasket part 685 is disposed at the connection part between the first dual plate part 61 and the second dual plate part 67, and the first insulating gasket part 681, the second insulating gasket part 682, and the third insulating gasket part The part 683 and the fourth insulating gasket part 684 are connected. The connection gasket part 685 according to an embodiment of the present invention includes a first connection part 686 , a second connection part 687 , an insulating connection part 688 , and a confirmation hole part 689 .

The first connecting portion 686 has a front-rear width wider than that of the common passage forming portion 64 of the first dual plate portion 61 , and the upper and lower surfaces of the common passage forming portion 64 of the first dual plate portion 61 . bound to wealth The second connecting portion 687 has a front-rear width wider than that of the common passage forming portion 64 of the second dual plate portion 67, and the upper and lower surfaces of the common passage forming portion 64 of the second dual plate portion 67. bound to wealth

The insulating connection part 688 is continuously formed between the first connection part 686 and the second connection part 687 , and insulates the first dual plate part 61 and the second dual plate part 67 . The insulating gasket 68 according to the present invention is made of an insulating material such as rubber, and the first insulating gasket part 681 , the second insulating gasket part 682 , the third insulating gasket part 683 , and the fourth insulating gasket part The portion 684 is integrally connected by an insulating connection portion 688 .

As the insulating connection part 688 is disposed between the first dual plate part 61 and the second dual plate part 67 made of a metal material, the insulation between the first dual plate part 61 and the second dual plate part 67 is insulated. Accordingly, the voltage generating action in each of the first dual plate part 61 and the second dual plate part 67 can be reliably performed.

The insulating connection part 688 has the same front-rear width as the first connection part 686 and the second connection part 687 , and is disposed between the first connection part 686 and the second connection part 687 . In addition, the first connecting portion 686 and the second connecting portion 687 have a front-rear width wider than the common passage forming portion 64 of the first dual plate portion 61 and the second dual plate portion 67, and the first dual The plate part 61 and the second dual plate part 67 are disposed on the upper surface and the bottom part, and are interconnected by the insulating connection part 688, so that the first dual plate part 61 and the second dual plate part 67 are connected to each other. The common flow path forming part 64 has a structure in which the front part is covered by the connection gasket part 685 .

Accordingly, the common flow path forming part 64 of the first dual plate part 61 and the second dual plate part 67 can be more firmly and stably connected by the connecting gasket part 685 . In addition, the insulating state between the first dual plate part 61 and the second dual plate part 67 can be more stably maintained by the connecting gasket part 685 .

The confirmation hole 689 is formed to be hollow in the shape of a groove on the first connection part 686 and the second connection part 687 . The confirmation hole 689 is an insulating gasket 68 in a state in which the common passage forming part 64 of the first dual plate part 61 and the second dual plate part 67 is supported in the vertical direction by using a pin member (not shown). ) can be formed by bonding by a method such as injection.

The common flow path forming part 64 of the first dual plate part 61 and the second dual plate part 67 covered by the connection gasket part 685 is made visible through the confirmation hole part 689 . Accordingly, it is possible to easily check with the naked eye whether the arrangement of the common flow path forming part 64 on the connecting gasket part 685 is defective, for example, the vertical position.

17 is an exploded perspective view schematically illustrating a second separator according to an embodiment of the present invention, and FIG. 18 is an enlarged view of part E of FIG. 13 .

17 and 18 , the second separating plate 7 according to an embodiment of the present invention includes a first dual plate part 61 and a second dual plate part 67 like the first separating plate 6 . ), and has a structure including an insulating gasket 68 , but compared with the first separating plate 6 , the insulating gasket 68 has an upper surface and a lower surface of the first dual plate part 61 and the second dual plate part 67 . It has a structure coupled to only one side of it.

The insulating gasket 68 of the second separating plate 7 has a structure including a first insulating gasket part 681 , a second insulating gasket part 682 , and a connection gasket part 685 . The first insulating gasket part 681 and the second insulating gasket part 682 are coupled to the bottom surfaces of the first dual plate part 61 and the second dual plate part 67, respectively, and the connecting gasket part 685 is a first dual plate part. The first insulating gasket part 681 and the second insulating gasket part 682 are connected between the plate part 61 and the second dual plate part 67 .

The first insulating gasket part 681 , the second insulating gasket part 682 , and the connecting gasket part 685 of the second separating plate 7 are the first insulating gasket part 681 of the first separating plate 6 . , has a structure and shape corresponding to each of the second insulating gasket portion 682 and the connecting gasket portion 685, and implements the same function, so a duplicate description thereof will be omitted.

19 is a plan-side conceptual diagram illustrating the flow of a fluid in a fuel cell cell according to an embodiment of the present invention, and FIG. 20 is a diagram illustrating a fluid flow in a fuel cell cell according to an embodiment of the present invention It is a conceptual diagram of the bottom side shown.

12, 13, 19, and 20, according to the fuel cell cell 4 according to an embodiment of the present invention, the first separator 6, the first gas diffusion layer 5b, from the lower side, It has a structure in which the membrane electrode assembly 5a, the second gas diffusion layer 5c, and the second separator 7 are sequentially stacked.

The first fluid 91 flowing downward into the first divided passage 631 of the first separator 6 through the third passage hole 244 (see FIGS. 7 and 11 ) of the first end plate 2 . ) passes diagonally through the plate plane flow path part 624 formed between the dual plate body part 62 of the first separator 6 and the first gas diffusion layer 5b, and the first divided flow path part 631 It flows into the first common divided flow path part 641 located in the front, and continuously passes through the first common divided flow path part 641 formed on the second dividing plate 7 to remove the first end plate (2). It is discharged upward through the three-channel hole 244 .

The second fluid 92 flowing downwardly into the second common divided passage portion 642 of the second separation plate 7 through the third passage hole 244 of the first end plate 2, the second separation plate Passing through the plate plane flow path part 624 formed between the dual plate body part 62 and the second gas diffusion layer 5c of (7) in the diagonal direction intersecting the first fluid 91, the second common divided flow path part It flows into the second divided flow path part 632 located in front of the 642 , and is discharged upwardly through the third flow path hole part 244 of the first end plate 2 .

The third fluid 93 flowing downward into the second flow passage 26 of the first separator 6 through the third passage hole 244 of the first end plate 2 is ) of the dual plate body 62 and the second separating plate 7 (or the second end plate 4) of the cell 4 positioned below the rear, to form a front third flow path It flows into the part 66 and is discharged upwardly through the third passage hole 244 of the first end plate 2 .

According to the fuel cell cell 4 according to the present invention, the first fluid flowing downward into the pair of left and right first divided flow passages 631 formed in each of the first dual plate part 61 and the second dual plate part 67 , respectively. 91 has a flow path that is merged and discharged upwardly on the first common divided flow path part 641 positioned in the middle.

In addition, the inflow downward into the second common divided flow path part 642 formed between the common flow path forming part 64 of the first dual plate part 61 and the common flow path forming part 64 of the second dual plate part 67 . The second fluid 92 is branched into a pair of left and right second divided flow passages 632 formed in the first dual plate part 61 and the second dual plate part 67, respectively, and has a flow path that is discharged upward.

As the first fluid 91 and the second fluid 92 flow in a direction crossing each other with the membrane electrode assembly 5a, the first gas diffusion layer 5b, and the second gas diffusion layer 5c therebetween, Compared with the embodiment in which the first fluid 91 and the second fluid 92 proceed in parallel with each other, the reaction efficiency of the fluid for voltage generation may be further improved.

In addition, in applying the first dividing plate 6 and the second dividing plate 7 of the dual cell structure, the first common divided flow path part 641 and the second common divided flow path part 642 are used as described above. By implementing the flow of the first fluid 91 and the second fluid 92 having a cross shape, the first dual plate part 61 and the second dual plate part 67 have only mutually independent flow paths compared to the embodiment, can significantly reduce the number of

In the description of the present invention, the flow direction of the first fluid 91, the second fluid 92, and the third fluid 93 is specifically set for convenience, but this is for the sake of understanding, and the first fluid 91 , it is not intended to limit the flow directions of the second fluid 92 and the third fluid 93 . Each of the first fluid 91 , the second fluid 92 , and the third fluid 93 may flow in the opposite direction to that shown in FIGS. 19 and 20 according to needs and conditions.

In addition, in the description of the present invention, for convenience, the relative positions of the first separator 6 and the second separator 7 are assumed to be disposed on the second separator 7 on the upper side of the first separator 6 . However, this is intended to help understanding, and is not intended to limit the arrangement. As for the first separator 6 and the second separator 7 , the second separator 7 may be disposed below the first separator 6 according to necessity and conditions.

21 is a perspective view schematically showing a flow path member for a fuel cell according to an embodiment of the present invention, FIG. 22 is an enlarged view of part F of FIG. 21 , and FIG. 23 is a flow path for a fuel cell according to an embodiment of the present invention. It is a side view schematically showing the member in the x-direction side, and FIG. 24 is a conceptual diagram illustrating the flow of a fluid by the flow path member for a fuel cell according to an embodiment of the present invention.

The flow path member 8 has a porous flow path structure and is disposed on the bottom surface of the first separator 6 in contact with the first gas diffusion layer 5b, so that the first separator 6 and the second gas diffusion layer 5c are formed. The flow of the second fluid 92 introduced therebetween is guided toward the second gas diffusion layer 5c. Accordingly, the second fluid 92 not only has fluidity in the transverse direction between the first separator 6 and the second gas diffusion layer 5c, but also has fluidity in the second gas diffusion layer ( The fluidity in the longitudinal direction toward 5c) is compounded.

In having a porous structure, the flow path member 8 has a mesh structure in which a horizontal core extending in the left and right directions and a vertical core extending in the front and rear directions intersect each other at a set interval. A hole through which the second fluid 92 can pass is formed between the horizontal core and the vertical core, and these holes are formed to a uniform degree throughout the flow path member 8 .

21 to 24 , the flow path member 8 according to an embodiment of the present invention includes a reaction reinforcing mesh portion 81 , a flow velocity gradient mesh portion 82 , a dispersion support mesh portion 85 , and a cushion support portion. (86).

The reaction reinforcing mesh portion 81 has a mesh structure and is disposed on the plate surface floating passage 624 of the second separator 7, and protrudes from the second separator 7 toward the second gas diffusion layer 5c. have In the reaction reinforcing mesh portion 81 according to an embodiment of the present invention, the flow of the second fluid 92 is made in the transverse direction, more specifically, from the front right portion to the rear left portion, or from the front left portion to the rear right portion On the second separating plate 7 formed in the diagonal direction facing, it is formed to extend in the front-rear direction, and a plurality of them are arranged in the left-right direction.

As the reaction reinforcing mesh portion 81 has a shape protruding from the second separator 7 toward the second gas diffusion layer 5c, as shown in FIG. The second fluid 92 may be guided toward the second gas diffusion layer 5c. Accordingly, the reaction between the second fluid 92 and the second gas diffusion layer 5c may be more stable and highly efficient.

The flow velocity gradient mesh part 82 is continuously formed at the end (the right part in FIGS. 21 to 24) close to the second gas diffusion layer 5c of the reaction reinforcement mesh part 81, and has a curved second second It is in contact with the gas diffusion layer 5c. The flow velocity gradient mesh part 82 has a plate shape extending in the front-rear and left-right directions as a whole, and has a curved curved part convex relatively convex toward the second gas diffusion layer 5c, and concave toward the second separator 7 side. It has a structure in which the curved surface portions are continuously connected.

The dispersion support mesh portion 85 has a mesh structure and is formed continuously with the right side of the flow velocity gradient mesh portion 82, and has a shape that is recessed from the second gas diffusion layer 5c side to the second separator plate 7 side. . The dispersion support mesh portion 85 has a shape symmetrical with the reaction reinforcing mesh portion 81 based on the flow velocity gradient mesh portion 82 .

As the reaction reinforcement mesh part 81 and the dispersion support mesh part 85 have a symmetrical shape with respect to the flow velocity gradient mesh part 82, when assembling the fuel cell stack, at the second gas diffusion layer 5c side The lamination pressure acting toward the second separator 7 is uniformly distributed from the flow velocity gradient mesh portion 82 in contact with the second gas diffusion layer 5c to the reaction reinforcing mesh portion 81 and the dispersion support mesh portion 85 . and is supported by the cushion support portion 86 in contact with the second separating plate 7 .

The cushion support part 86 is a device part in which the cushion support part 86 is in contact with the second separator 7, has a mesh structure and is continuously formed with the right side of the dispersion support mesh part 85, and the second separator plate (7) is connected to the other reaction reinforcement mesh portion 81 adjacent to the left and right by forming a concave curved surface.

The lamination pressure applied by being dispersed from the flow velocity gradient mesh part 82 to the reaction reinforcement mesh part 81 and the dispersion support mesh part 85 is finally applied by the cushion support part 86 in contact with the second separator plate 7 . is supported As the flow path member 8 includes a metal material and the cushion support part 86 has a curved shape, the cushion support part 86 functions as a cushion that elastically supports the lamination pressure.

In addition, the flow velocity gradient mesh portion 82 in contact with the second gas diffusion layer 5c has a continuous curved shape without a corner portion. The second gas diffusion layer 5c due to the contact pressure between the second gas diffusion layer 5c and the flow velocity gradient mesh portion 82 by the flow velocity gradient mesh portion 82 and the cushion support portion 86 having the structure as described above. However, it is possible to prevent damage to the flow path member 8 .

The reaction reinforcing mesh portion 81, the flow velocity gradient mesh portion 82, the dispersion support mesh portion 85, and the cushion support portion 86 are continuously connected in the left and right directions to form a single unit, one embodiment of the present invention The flow path member 8 according to the example has a structure in which such mesh units are continuously connected in the left and right directions.

The reaction reinforcement mesh part 81, the flow velocity gradient mesh part 82, and the dispersion support mesh part 85 are continuously connected to form a '∩' shape, and the dispersion support mesh part 85, the cushion support part 86. , the reaction reinforcement mesh portion 81 is continuously connected to form a '∪' shape. The reaction reinforcement mesh part 81, the flow velocity gradient mesh part 82, the dispersion support mesh part 85, and the cushion support part 86 have a curved surface having a '∩'-shaped cross-sectional shape and a '∪'-shaped cross-sectional shape. The branch has a structure in which the curved surfaces are alternately and continuously connected along the arrangement direction (left and right direction) of the reaction reinforcing mesh portion 81 .

With this three-dimensional three-dimensional bending structure, the second fluid 92 having a flow path in the lateral direction can be guided toward the second gas diffusion layer 5c, and throughout the section where the flow path member 8 is installed. The reaction between the second fluid 92 and the second gas diffusion layer 5c may be more stable and highly efficient. In addition, damage to the second gas diffusion layer 5c or the flow path member 8 due to the contact pressure between the second gas diffusion layer 5c and the flow velocity gradient mesh portion 82 can be prevented by the elastic cushion structure.

The flow path member 8 has a shape in which a horizontal core extending in the left and right direction and a vertical core extending in the front-rear direction cross each other, and may have a structure in which the intersection between the horizontal core and the vertical core is located on the same cross-section. . That is, when the horizontal core and the vertical core of the flow path member 8 are spread out in a flat shape without bending, a part of the horizontal core is located above the vertical core or a part of the vertical core is not located above the horizontal core, but the flow path member (8) The whole may have a certain height corresponding to the thickness of the horizontal and vertical cores.

According to this structure, the flow path member 8 is bent to a set height and depth corresponding to a space of a limited height (thickness) formed between the second separator 7 and the second gas diffusion layer 5c to form a curved surface. In forming , a curved surface having a '∩' cross-sectional shape and a curved surface having a '∪' cross-sectional shape may be more clearly formed. Accordingly, the reaction between the second fluid 92 and the second gas diffusion layer 5c can be made more highly efficient, and the elastic cushioning action can be more stably implemented.

25 is a y-direction side view schematically illustrating a flow path member for a fuel cell according to an embodiment of the present invention.

21 to 25 , the flow velocity gradient mesh portion 82 according to an embodiment of the present invention includes a flow velocity decreasing gradient portion 83 and a flow velocity increasing gradient portion 84 .

A plurality of flow velocity reducing gradient portions 83 have a convex shape toward the second gas diffusion layer 5c and are disposed in the front-rear direction along the extension direction of the reaction reinforcing mesh portion 81 . The flow velocity reducing gradient portion 83 forms a curved surface having a '∩' cross-sectional shape in the front-rear direction, and also forms a curved surface having a '∩'-shaped cross-sectional shape in the left and right directions.

The flow velocity increasing gradient portion 84 has a concave shape toward the second gas diffusion layer 5c and is continuously formed between the flow velocity decreasing gradient portions 83 . The flow velocity increasing gradient portion 84 forms a curved surface having a '∪'-shaped cross-sectional shape in the front-rear direction, and has a '∩'-shaped cross-sectional shape in the left-right direction, relatively lower than the flow velocity decreasing gradient portion 83 . It forms a curved surface of height.

The flow velocity gradient mesh portion 82 is a curved surface having a '∩' cross-sectional shape and a '∪' cross-sectional shape by the flow velocity decreasing gradient portion 83 and the flow velocity increasing gradient portion 84. Along the extending direction of the mesh portion 81, that is, it has a structure connected in succession alternately in the front-rear direction.

The flow velocity reducing gradient portion 83 forms a curved surface having a '∩' cross-sectional shape and is in contact with the second gas diffusion layer 5c. Accordingly, the flow velocity decreasing gradient unit 83 can more clearly implement the action of guiding the second fluid 92 toward the second gas diffusion layer 5c side than the flow velocity increasing gradient unit 84 . The flow velocity increasing gradient portion 84 forms a curved surface having a '∪' cross-sectional shape so that the second fluid 92 smoothly passes between the second gas diffusion layer 5c and the flow path member 8 without interference. to form a flow path that can

Part of the second fluid 92 flowing toward the flow velocity gradient mesh part 82 through the reaction reinforcement mesh part 81 enters the flow velocity reduction gradient part 83, and the other part enters the flow velocity gradient part 84. is entered At this time, the second fluid 92 that has entered the flow rate decreasing gradient unit 83 interferes with the flow rate decreasing gradient unit 83 and has a speed compared to that of the second fluid 92 that has entered the flow rate increasing gradient unit 84 . becomes slow

In addition, the second fluid 92 passing through the flow velocity gradient mesh portion 82 with the speed difference as described above is mixed on the space formed between the cushion support portion 86 and the second gas diffusion layer 5c, and It is dispersed and passes through the flow velocity gradient mesh portion 82 with a speed difference depending on the position again.

Accordingly, the second fluid 92 has a main flow direction that proceeds in a diagonal direction of the second separator 7 between the second separator 7 and the second gas diffusion layer 5c, and the flow path member By (8), the flow is made in a state in which a relatively fast portion and a relatively slow portion are mixed throughout. Accordingly, the second fluid 92 flows in the main flow direction while continuously changing the flow direction while increasing and slowing the flow rate.

In addition, as the flow path member 8 has a mesh structure, water droplets are generated between the second separator 7 and the second gas diffusion layer 5c. Instead of retreating in the opposite direction to the advancing direction, the water droplets are dispersed and flowed around the water droplets while pushing them in the direction of flow.

According to the flow path member 8 according to an embodiment of the present invention, water can be discharged smoothly due to the flow velocity gradient of the second fluid 92 and the flow characteristics of the mesh structure as described above. In particular, minute vibrations may be generated due to the gradient of the flow velocity of the second fluid 92, and water discharge performance may be further improved by such vibrations.

26 is a perspective view illustrating a state in which a fuel cell flow path member is installed on a second separator according to an embodiment of the present invention, and FIG. 27 is a cross-sectional view of a main part of FIG. 26 .

26 and 27 , in the separator 621 of the second separator 7 according to an embodiment of the present invention, the protruding bent portion 622 and the depressed bent portion 623 are alternately continuous along the left and right directions. to have an arranged structure.

The protruding bent portion 622 is formed to protrude from the depressed bent portion 623 toward the second gas diffusion layer 5c, and is formed to extend in the front-rear direction along the extension direction of the reaction reinforcing mesh portion 81 . The recessed curved portions 623 are formed to be recessed between the projecting curved portions 622 in a direction spaced apart from the second gas diffusion layer 5c.

When the flow path member 8 is installed on the second separating plate 7, the protruding bent portion 622 is in contact with the flow rate reducing gradient portion 83 of the flow rate gradient mesh portion 82, and the depressed bent portion 623 is a cushion support portion ( 86) is in contact. At this time, the flow path member 8 is caught by the protrusion and bent portion 622, the movement in the left and right direction is restricted, and the installation state can be stably maintained. That is, the protruding bent portion 622 functions as a locking protrusion that restricts the movement of the flow path member 8 . In addition, the protruding bent portion 622 together with the reaction reinforcing mesh portion 81 of the flow path member 8 induces the longitudinal flow of the second fluid 92 to be made more clearly.

Up to now, the present invention has been looked at focusing on examples. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

1: end plate 2: first end plate
3: second end plate 4: cell
5a: membrane electrode assembly 5b: first gas diffusion layer
5c: second gas diffusion layer 6: first separator
7: second separator 8: flow path member
21: plate body part 22: first plate part
23: second plate part 24: third plate part
25: first flow path part 26: second flow path part
27: third flow path part 28: first gasket part
29: second gasket part 61: first dual plate part
62: dual plate body part 63: first flow path forming part
64: common flow path forming unit 65: second flow path forming unit
66: third flow path forming part 67: second dual plate part
68: insulation gasket 81: reaction reinforcement mesh part
82: flow velocity gradient mesh portion 83: flow velocity reduction gradient portion
84: flow velocity increasing gradient part 85: dispersion support mesh part
86: cushion support part 91: first fluid
92: second fluid 93: third fluid
221: first body part 222: first flow hole part
231: second body part 232: first branch groove part
233: second branch groove 234: second flow hole part
235: second dividing wall part 241: third body part
242: third branch groove 243: fourth branch groove
244: third passage hole part 245: third dividing wall part
246: communication groove 251: first inlet
252: first branch guide unit 253: first inflow pass unit
254: first discharge pass unit 255: first discharge unit
261: second inlet portion 262: second inlet pass portion
263: second discharge pass part 264: second branch guide part
265: second outlet 271: third inlet
272: third branch guide 273: third inflow pass part
274: third discharge pass part 275: fourth branch guide part
276: third discharge part 621: separator plate part
622: protruding bent part 623: depressed bent part
624: plate surface passage part 625: inlet hole part
626: discharge hole part 631: first divided flow path part
632: second divided flow path part 641: first common divided flow path part
642: second common divided flow passage part 681: first insulating gasket part
682: second insulating gasket part 683: third insulating gasket part
684: fourth insulating gasket part 685: connecting gasket part
686: first connection part 687: second connection part
688: insulation connection part 689: confirmation hole part

Claims (8)

a reaction reinforcing mesh portion having a mesh structure and disposed on the fuel cell separator and having a shape protruding from the separator toward the gas diffusion layer to guide the flow of the fluid toward the gas diffusion layer; and
It has a mesh structure and is formed continuously with the reaction reinforcing mesh part, has a curved curved surface and a flow velocity gradient mesh part in contact with the gas diffusion layer;
The flow rate gradient mesh portion,
a flow velocity reducing gradient portion having a convex shape toward the gas diffusion layer and disposed along the extension direction of the reaction reinforcement mesh portion, and in contact with the gas diffusion layer; and
and a flow velocity increasing gradient portion having a concave shape toward the separation plate and continuously formed between the flow velocity decreasing gradient portions.
According to claim 1,
Distributed support mesh portion having a mesh structure and formed continuously with the flow velocity gradient mesh portion, and having a shape recessed toward the separation plate; and
The flow path member for a fuel cell separator further comprising: a cushion support part having a mesh structure, formed continuously with the dispersion support mesh part, and having a concave curved surface toward the separator plate and connected to the reaction reinforcement mesh part.
3. The method of claim 2,
The reaction reinforcing mesh portion, the flow rate gradient mesh portion, the distributed support mesh portion, and the cushion support portion are curved surfaces having a '∩' cross-sectional shape, and a curved surface having a '∪' cross-sectional shape is the reaction reinforcement mesh portion A flow path member for a fuel cell separator, characterized in that it has a structure connected in succession alternately along an arrangement direction.
delete According to claim 1,
The flow gradient mesh portion has a structure in which a curved surface having a '∩' cross-sectional shape and a curved surface having a '∪' cross-sectional shape are alternately and continuously connected along the extension direction of the reaction reinforcement mesh part. A flow path member for a battery separator.
a first separator disposed on one side of the membrane electrode assembly with the first gas diffusion layer interposed therebetween;
a second separator disposed on the other side of the membrane electrode assembly with a second gas diffusion layer interposed therebetween; and
a flow path member disposed on one surface of the second separator facing the second gas diffusion layer; and
The flow path member,
a reaction reinforcing mesh portion having a mesh structure and disposed on the second separator and having a shape protruding from the second separator toward the second gas diffusion layer to guide the flow of the fluid toward the second gas diffusion layer; and
It has a mesh structure and is formed continuously with the reaction-reinforced mesh portion, has a curved curved surface and a flow velocity gradient mesh portion in contact with the second gas diffusion layer;
The flow rate gradient mesh portion,
a flow velocity decreasing gradient portion having a convex shape toward the second gas diffusion layer and disposed along the extension direction of the reaction reinforcement mesh portion, and in contact with the second gas diffusion layer; and
and a flow velocity increasing gradient part having a concave shape toward the second separator and continuously formed between the flow velocity decreasing gradient parts.
7. The method of claim 6,
The second separator is
separating plate;
a plate surface passage portion formed on one surface of the separating plate portion, forming a passage through which a fluid can flow, and in which the passage member is disposed;
an inlet hole formed to pass through the separating plate, disposed on one side of the plate-plane flow path, and forming a passage through which the fluid flows into the plate-plane flow path; and
and a discharge hole formed to pass through the separation plate, disposed on the other side of the plate-plane flow path, and forming a passage through which the fluid on the plate-plane flow path is discharged.
8. The method of claim 7,
The flow path member,
Distributed support mesh portion having a mesh structure and formed continuously with the flow velocity gradient mesh portion, and having a shape recessed toward the second separator; and
It has a mesh structure and is formed continuously with the dispersed support mesh portion, and forms a concave curved surface toward the second separating plate, and a cushion support portion connected to the reaction reinforcing mesh portion; further comprising,
The separation plate part,
a protruding bent portion formed to protrude toward the second gas diffusion layer, extending along an extension direction of the reaction reinforcement mesh portion, and in contact with the flow velocity gradient mesh portion; and
and recessed and curved portions alternately disposed between the protruding and curved portions and contacting the cushion support portion.

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