fuel cell separator

Abstract

The present invention relates to a fuel cell separator, and more specifically, the fuel cell separator according to this embodiment includes a main body including a gas inlet formed along a first side and a gas outlet formed along a second side located diagonally opposite to the gas inlet and facing the first side; a first block portion installed diagonally on the main body to fluidly connect the gas inlet and the gas outlet; a second block portion located on the opposite side of the gas inlet so as to be fluidly connected to the first block portion and adjacent to the first corner region of the first side; and a third block portion located on the opposite side of the gas outlet so as to be fluidly connected to the first block portion and adjacent to the second corner region of the second side.

Description

Technical Field

[0001] The present invention relates to a fuel cell separator plate. Specifically, it includes a main body including a gas inlet and a gas outlet, a first block portion installed on the main body, a second block portion fluidly connected to the first block portion, and a third block portion fluidly connected to the first block portion. By the structure and area ratio of the first block portion, the second block portion, and the third block portion, it relates to a fuel cell separator plate for preventing flooding phenomenon and the phenomenon that the membrane electrode assembly dries out, and for adjusting the fluid properties of the flow field.

Background Art

[0002] Fuel cells, which are classified into solid oxide fuel cells, molten carbonate fuel cells, and polymer electrolyte membrane fuel cells according to the type of electrolyte, are power generation devices that convert chemical energy generated by oxidizing fuel into electrical energy.

[0003] Among such fuel cells, a polymer electrolyte membrane fuel cell (PEMFC) includes a membrane - electrode assembly (MEA) having an electrode layer with an anode and a cathode centered on an electrolyte membrane that can permeate hydrogen ions, a gas diffusion layer (GDL) that uniformly distributes reaction gases, and a separator plate (bipolar plate) that supplies reaction gases to the gas diffusion layer and discharges generated water.

[0004] As the flow channel structure of a conventionally known fuel cell separator plate for the diffusion of reaction gases and the discharge of water, there are a meandering flow channel in which a meandering flow channel is continuously formed, a parallel flow channel in which a plurality of linear flow channel groups are arranged in parallel, a parallel and series mixed flow channel in which parallel flow channels are connected to each other, and a two - dimensional flow channel structure such as a protrusion - type flow channel in which a plurality of dot - shaped protrusions are arranged, as well as a three - dimensional structure flow channel composed of a mesh - like structure.

[0005] However, fuel cell separators with meandering channels, parallel channels, and parallel and series mixed channels have a problem in that, because the gas flows laminarly through the channels, moisture generated in the membrane electrode assembly (MEA) is not properly removed by the fuel cell separator. As the gas moves towards the gas outlet, the gas pressure decreases, and there is a high possibility that the membrane electrode assembly (MEA) will flood due to the channel becoming blocked with moisture.

[0006] Furthermore, fuel cell separators that employ a protruding channel structure, or a channel structure that combines a protruding channel structure with other channel structures, had the problem of excessive moisture generated in the membrane electrode assembly (MEA) being discharged, causing the MEA to dry out.

[0007] Furthermore, fuel cell separation plates with three-dimensional flow channels had the problem that moisture could not be removed from the complex three-dimensional flow channels, making processing and assembly difficult and increasing production costs.

[0008] Furthermore, conventional fuel cell systems require the attachment of a fuel cell stack humidifier to prevent the membrane electrode assembly (MEA) from drying out, which increases the volume and weight of the fuel cell system. This increase in volume and weight limits the types of devices and fields in which fuel cell systems can be utilized. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Korean Published Patent No. 10-2017-0050689 (Publication Date: 2017.05.11) [Patent Document 2] Korean Published Patent No. 10-2010-0112354 (Publication Date: 2010.10.19) [Overview of the Initiative] [Problems that the invention aims to solve]

[0010] This invention was devised to solve the above-mentioned problems, and aims to provide a fuel cell separation plate having a flow channel structure that can prevent flooding and drying of the membrane electrode assembly (MEA).

[0011] Furthermore, the present invention provides a fuel cell separation plate having a flow channel structure that can form a three-dimensional H2O circulation path in the fuel cell cell in which moisture generated in the membrane electrode assembly (MEA) is reused for self-humidification of the membrane electrode assembly (MEA).

[0012] Furthermore, the present invention provides a fuel cell separation plate having a flow path structure that can reduce the overall volume and weight of a fuel cell system by removing a humidifier in the fuel cell system.

[0013] The problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0014] A fuel cell separation plate according to one embodiment of the present invention has a gas inlet formed along the first side, and a gas inlet located diagonally opposite the gas inlet and facing the first side. Second side A main body including a gas outlet formed along a curve, a first block section installed diagonally to the main body to fluidly connect the gas inlet and the gas outlet, and a section on the opposite side of the gas inlet to be fluidly connected to the first block section. located A second block section is installed adjacent to the first corner region of the first side, and on the opposite side of the gas outlet, it is fluidly connected to the first block section. located It may include a third block section installed adjacent to the second corner region of the second side.

[0015] Furthermore, the first block section forms a first angle with the first side of the main body and the first center line that penetrates the center point of the main body perpendicularly. 11th intervalIt can include a plurality of first block lines arranged therein and a plurality of first flow paths formed between the plurality of first block lines.

[0016] Also, each of the plurality of first block lines 12th interval can include a plurality of first block members arranged therein and 12th interval a plurality of first mixing parts formed thereby and fluidly connecting the plurality of first flow paths.

[0017] Also, the plurality of first block lines can include a first boundary block line facing the end of the gas inlet and forming a boundary with the second block part, and a second boundary block line facing the end of the gas outlet and forming a boundary with the third block part.

[0018] Also, the area ratios of the first block part, the second block part, and the third block part to the total area of the main body can vary by changing one or more of the inlet length of the gas inlet, the outlet length of the gas outlet, and the first angle.

[0019] Also, the second block part forms a first center line that penetrates the center point of the main body perpendicular to the first side of the main body and Fourth angle and can include a plurality of second block lines arranged therein and a plurality of second flow paths formed between the plurality of second block lines. 22nd interval

[0020] Also, each of the plurality of second block lines can include a plurality of second block members arranged at a second interval and a plurality of second mixing parts formed by the second interval and fluidly connecting the plurality of second flow paths.

[0021] Fifth angle Also, the third block part forms a first center line that penetrates the center point of the main body perpendicular to the first side of the main body and 31st interval and can include a plurality of third block lines arranged therein and a plurality of third flow paths formed between the plurality of third block lines.

[0022] ​​Furthermore, each of the multiple third block lines may include a plurality of third block members arranged at 31 intervals, and a plurality of third mixing sections formed by the 31 intervals and fluidly connecting a plurality of third flow channels.

[0023] Furthermore, it may include a pair of fluid passages that are parallel to a first center line that is perpendicular to the first side of the main body and penetrates the center point of the main body, and are installed spaced apart from each other, flanking the first block section, the second block section, and the third block section.

[0024] Furthermore, the pair of fluid passages may include a first fluid passage installed between the first and second sides facing one end of the gas inlet and fluidly connected to the first and third block sections, and a second fluid passage installed between the first and second sides facing one end of the gas outlet and fluidly connected to the first and second block sections. [Effects of the Invention]

[0025] According to one embodiment of the present invention, a fuel cell separation plate is formed by a diagonal flow field created by the fluidic connection of multiple first channels through which laminar flow flows, adjacent to each other by multiple first mixing sections where turbulence is generated. This improves gas diffusion to the membrane electrode assembly (MEA) and allows moisture to be smoothly discharged, thereby preventing the flooding phenomenon of H2O in the membrane electrode assembly (MEA) and the first channels.

[0026] Furthermore, according to one embodiment of the present invention, the three-dimensional H2O circulation path formed by the first linear diagonal flow field and the first curved diagonal flow field formed in the first block portion of the fuel cell separation plate, and the first turbulent stagnant flow field to the third turbulent stagnant flow field formed in the second and third block portions, allows H2O generated in the membrane electrode assembly to be smoothly discharged to the outside of the fuel cell, thereby preventing H2O flooding. Additionally, the three-dimensional H2O circulation path supplies a portion of the H2O discharged from the membrane electrode assembly to the membrane electrode assembly, preventing the membrane electrode assembly from drying out.

[0027] Furthermore, according to one embodiment of the present invention, by adjusting the area ratio (%) of the areas of the first, second, and third block sections within the total area of ​​the block section (the sum of the areas of the first, second, and third block sections of the fuel cell separation plate), it is possible to increase the gas transfer speed per unit time and the resulting energy supply per unit time to suit mobility devices, or to increase the gas supply area and gas diffusion area to produce high energy per unit area to suit storage devices. [Brief explanation of the drawing]

[0028] [Figure 1] This figure schematically shows a fuel cell separation plate according to the first embodiment of the present invention. [Figure 2] This diagram schematically shows the first block section of Figure 1. [Figure 3] This figure schematically shows the first block line of the first block section in Figure 2. [Figure 4] This figure schematically shows a first modified example of the first block line of the first block section in Figure 3. [Figure 5] This figure schematically shows a second modified example of the first block line of the first block section in Figure 3. [Figure 6] This figure schematically shows a third modified example of the first block line of the first block section in Figure 3. [Figure 7] This figure schematically shows the first and second boundary block lines of the fuel cell separation plate in Figure 2. [Figure 8] This figure schematically shows the first boundary block line in Figure 7. [Figure 9] This figure schematically shows the first modified example of the first boundary block line in Figure 8. [Figure 10] This figure schematically shows a second modified example of the first boundary block line in Figure 8. [Figure 11] This figure schematically shows a third modified example of the first boundary block line in Figure 8. [Figure 12] This figure schematically shows the change in the angle between the first centerline CL and the first and second boundary block lines, as well as the lengths of the first and second boundary block lines in Figure 2, and the gas inlet and gas outlet. [Figure 13] This figure schematically shows the changes in the areas of the first block section, the second block section, and the third block section due to the change in the angle between the first center line CL and the first and second boundary block lines in Figure 12. [Figure 14] This figure schematically shows the changes in the areas of the first block section, the second block section, and the third block section due to the change in the angle between the first center line CL and the first and second boundary block lines in Figure 12. [Figure 15] This figure schematically shows the changes in the areas of the first block section, the second block section, and the third block section due to the change in the angle between the first center line CL and the first and second boundary block lines in Figure 12. [Figure 16] This figure schematically shows the changes in the areas of the first block section, the second block section, and the third block section due to the change in the angle between the first center line CL and the first and second boundary block lines in Figure 12. [Figure 17] This diagram schematically shows the second and third block sections of Figure 1. [Figure 18] This figure schematically shows the second block line of the second block section in Figure 17. [Figure 19]This figure schematically shows a first modified example of the second block line of the second block section in Figure 18. [Figure 20] This figure schematically shows a second modified example of the second block line of the second block section in Figure 18. [Figure 21] This figure schematically shows a third modified example of the second block line of the second block section in Figure 18. [Figure 22] This figure schematically shows several different variations of the second block line of the second block section in Figure 18. [Figure 23] This figure schematically shows the fluid flow in the first and second block sections of the fuel cell separation plate shown in Figure 1. [Figure 24] This figure schematically shows the combined flow field formed on the fuel cell separation plate in Figure 1 by the fluid flow in Figure 23. [Figure 25] Figure 1 shows a schematic diagram illustrating the fluid and H2O flow paths in a fuel cell cell, including the fuel cell separator plate. [Figure 26] Figure 25 shows a schematic diagram illustrating the fluid and H2O flow paths in the fuel cell separator plate shown in Figure 1, in the fuel cell cell shown in Figure 25. [Figure 27] Figure 25 shows a schematic diagram illustrating the fluid and H2O flow paths in the fuel cell separation plate into which hydrogen flows in. [Figure 28] This figure schematically shows a fuel cell separation plate according to a second embodiment of the present invention. [Figure 29] Figure 28 is a schematic diagram showing a pair of fluid passages in the fuel cell separation plate. [Figure 30] This figure schematically shows the combined flow field formed on the fuel cell separation plate, which includes the pair of fluid passages shown in Figure 28. [Figure 31] This figure schematically shows the fluid and H2O flow paths in the fuel cell separator plate shown in Figure 28, in the fuel cell cell shown in Figure 25. [Figure 32] This graph image compares the voltage behavior over time between a novel fuel cell to which a fuel cell separation plate according to the second embodiment of the present invention is applied, and a conventional fuel cell to which a conventional fuel cell separation plate is applied. [Figure 33] This is a magnified graph image of the S1 portion of Figure 32. [Best Mode for Carrying Out the Invention]

[0029] The advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and can be embodied in a variety of different forms.

[0030] The technical features of the present invention will be specifically described below with reference to the attached drawings.

[0031] Figure 1 is a schematic diagram showing a fuel cell separation plate according to the first embodiment of the present invention.

[0032] Referring to Figure 1, the fuel cell separation plate 100 according to the first embodiment of the present invention may include a main body 10, a first block section 20, a second block section 30, and a third block section 40.

[0033] The main body 10 of the fuel cell separation plate 100 according to this embodiment may be a rectangle consisting of a first side 1, a second side 2 opposite to the first side 1, and a third side 3 and a fourth side 4 that connect the first side 1 and the second side and are opposite to each other.

[0034] However, the main body 10 in this embodiment is not limited to a rectangle, but may be one of several polygons that include opposing short sides or long sides.

[0035] The main body 10 of the fuel cell separation plate 100 may include a gas inlet 11 and a gas outlet 12, and a sealing member 400 may be attached to the main body 10.

[0036] Here, the gas inlet 11 may be formed along the first side 1 of the main body 10, and the gas outlet 12 may be formed along the second side 2 of the main body 10 so as to be located diagonally opposite to the gas inlet 11.

[0037] Furthermore, the sealing member 400 can be joined along the edge of the main body 10 so as to surround the first block portion 20, the second block portion 30, and the third block portion 40.

[0038] As a result, the sealing member 400 according to this embodiment can prevent gas flowing into the first inlet 11 of the main body 10 from leaking to the outside, and prevents gas moving diagonally between the inlet 11 and the first outlet 12 from moving outside the first block section 20, the second block section 30 and the third block section 40, thereby forming a flow field with the gas flowing into the first block section 20, the second block section 30 and the third block section 40.

[0039] However, the configuration for preventing gas from moving to the outside of the first block section 20, the second block section 30, and the third block section 40 is not limited to the sealing member 400, and may include various configurations such as gas-blocking projections and gas-blocking members installed around the first block section 20, the second block section 30, and the third block section 40 to prevent gas movement.

[0040] The first block section 20 in this embodiment is installed in the main body 10 in a diagonal direction between the gas inlet 11 and the gas outlet 12, and can fluidly connect the gas inlet 11 and the gas outlet 12.

[0041] Furthermore, the second block section 30 according to this embodiment may be located on the opposite side of the gas inlet 11 so as to be fluidly connected to the first block section 20, and may be installed adjacent to the first corner region A1 of the first side.

[0042] Furthermore, the third block section 40 in this embodiment is fluidly connected to the first block section 20, and includes a gas outlet. 12 It may be located on the opposite side and adjacent to the second corner region A2 of the second side.

[0043] In this embodiment, the second block section 30 and the third block section 40 can be installed diagonally opposite to each other between the first side 1 and the second side 2.

[0044] Therefore, according to the fuel cell separation plate 100 of this embodiment, a composite flow field can be formed, which includes a diagonal flow field formed in the first block section 20 installed diagonally between the gas inlet 11 and the gas outlet 12, and a stagnant flow field formed in the second block section 30 and the third block section 40 that is fluidically connected to the diagonal flow field formed in the first block section 20.

[0045] The diagonal flow field formed in the first block section 20 and the stagnant flow fields formed in the second block section 30 and the third block section 40 will be explained in detail in the explanatory sections for Figures 22 and 23.

[0046] Figure 2 is a schematic diagram showing the first block section of Figure 1, and Figure 3 is a schematic diagram showing the first block line of the first block section of Figure 2. Furthermore, Figures 4 to 6 are schematic diagrams showing the first to third modified examples of the first block line of the first block section of Figure 3.

[0047] Referring to Figure 2, the first block section 20 according to this embodiment may include a plurality of first block lines 21 arranged at 11 intervals G11, and a plurality of first flow paths 22 formed between the plurality of first block lines 21.

[0048] Each of the multiple first block lines 21 can form a first angle α1 with a first center line CL that penetrates the center point perpendicularly to the first side 1 of the main body.

[0049] The first angle α1 is the diagonal inclination of the first block line 21 installed between the gas inlet 11 and the gas outlet 12, which are arranged diagonally, and can be an acute angle greater than 0° and less than 90°.

[0050] Here, the angles formed between the first center line CL and each of the block lines 21 may be the same or different from each other.

[0051] In more detail, as shown in Figure 2, when α1a and α1b are the angles formed between the first center line CL and some of the multiple block lines 21, α1a and α1b may be the same or different angles.

[0052] By adjusting the angle between the first center line CL and each of the multiple block lines 21, the width of the flow path 22 formed between the multiple block lines 21 and the area of ​​the flow path can be adjusted.

[0053] Therefore, according to this embodiment, by adjusting the first angle α1 formed by the first center line CL and each of the multiple block lines 21 to be the same or different, the flow velocity and flow rate of the fluid passing through the first block section 20 can be controlled by the width of the flow path 22 and the area of ​​the flow path thereafter.

[0054] The range of angular values ​​for the first angle α1 formed between each of the multiple first block lines 21 and the first center line CL will be explained in more detail in the following section describing Figure 12.

[0055] Furthermore, each of the multiple first block lines 21 according to this embodiment may include a plurality of first block members 211 arranged at 12 intervals G12, and a plurality of first mixing sections 212 formed by the 12 intervals G12 and fluidly connecting a plurality of first flow paths 22.

[0056] As shown in Figure 2, each of the multiple first block lines 21 can be formed by aligning each of the multiple first block members 211 diagonally between the gas inlet 11 and the gas outlet 12, with each of the multiple first block members 211 forming an angle with the first centerline CL.

[0057] Furthermore, in the multiple first mixing sections 212 formed between the multiple first block members 211 by the 12th interval G12, the multiple first flow channels 22 formed between the multiple first block lines 21 are fluidically connected, and turbulence can be generated in the mixing section 212 that fluidly connects the multiple first flow channels 22.

[0058] Therefore, according to this embodiment, the diagonal flow field formed by the fluidic connection of multiple first channels 22, which are adjacent to each other and carry laminar flow, by multiple first mixing sections 212, which generate turbulence, improves gas diffusion into the membrane electrode assembly (MEA) and allows moisture to be smoothly discharged, thereby preventing the flooding phenomenon of H2O in the membrane electrode assembly (MEA) and the first channels 22.

[0059] Referring to Figures 3 to 6, the first block member 211 forming the first block line 21 in this embodiment may include one or more of the following: a straight rib-shaped block, a columnar block, and a corrugated rib-shaped block.

[0060] In the following sections, detailed explanations of parts common to those explained with reference to Figure 2 will be omitted, and only the necessary parts will be briefly explained.

[0061] Figure 3 is a schematic diagram showing an embodiment of the first block line of the first block section in Figure 2.

[0062] Referring to Figure 3, each of the multiple first t1 block lines 21t1 may include multiple first t1 linear rib-shaped block members 211t1, and multiple first t1 mixed portions 212t1 formed between the multiple first t1 linear rib-shaped block members 211t1 arranged at intervals of 12t1 G12t1.

[0063] Furthermore, multiple 1st t1 block lines 21t1 are spaced apart at intervals of 11t1. G11t2 Multiple first t1 flow channels 22t1 can be formed by arranging them in such a way, and some of the multiple first t1 mixing sections 212t1 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0064] Figure 4 is a schematic diagram showing a first modified example of the first t1 block line of the first block section in Figure 3.

[0065] Referring to Figure 4, each of the multiple first t2 block lines 21t2 may include a first t rib-shaped block member 211t22 which includes a multiple first t21 linear rib-shaped block member 211t21 and a multiple first t22 columnar block member 211t22 which is arranged between the multiple first t21 linear rib-shaped block members 211t21 and the multiple first t22 columnar block member 211t22 which are arranged at a 12t2 interval G12t2, and a multiple first t2 mixed portion 212t2 which is formed between the multiple first t21 linear rib-shaped block members 211t21 and the multiple first t22 columnar block member 211t22.

[0066] Furthermore, multiple first t2 block lines 21t2 can be arranged at 11t2 intervals G11t2 to form multiple first t2 flow channels 22t2, and some of the multiple 12t2 mixing sections 212t2 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0067] Figure 5 is a schematic diagram showing a second modified example of the first t1 block line of the first block section in Figure 3.

[0068] Referring to Figure 5, each of the multiple first t3 block lines 21t3 can include multiple first t3 corrugated rib-shaped block members 211t3, and multiple first t3 mixed portions 212t3 formed between the multiple first t3 corrugated rib-shaped block members 211t3 arranged at a 12t3 interval G12t3.

[0069] Furthermore, multiple first t3 block lines 21t3 can be arranged at 11t3 intervals G11t3 to form multiple first t3 flow channels 22t3, and some of the multiple 12t3 mixing sections 212t3 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0070] Figure 6 is a schematic diagram showing a third modified example of the first t1 block line 21t1 of the first block section in Figure 3.

[0071] Referring to Figure 6, each of the multiple first t4 block lines 21t4 may include a first t4 mixed rib-shaped block member 211t44 which includes a plurality of first t41 corrugated rib-shaped block members 211t41 and a plurality of first t42 columnar block members 211t42 which are arranged between the plurality of first t41 corrugated rib-shaped block members 211t41, as well as a plurality of first t4 mixed portions 212t4 which are formed between the plurality of first t4 corrugated rib-shaped block members 211t4 and the plurality of first t42 columnar block members 211t42 which are arranged at a 12t4 interval G12t4.

[0072] Also, multiple 1st t4 block lines 21t4 These can be arranged at intervals of 11t4 G11t4 to form a plurality of 1t4 flow channels 22t4, and some of the plurality of 12t4 mixing sections 212t4 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0073] However, the first block line 21 and the first block members 211 comprising it according to this embodiment are not limited to the shapes and arrangements shown in Figures 3 to 6 and the related explanatory sections, and can be modified to include block members of other shapes and block lines in which such block members are arranged in various orders.

[0074] Figure 7 is a schematic diagram showing the first and second boundary block lines of the fuel cell separation plate in Figure 2, and Figure 8 is a schematic diagram showing the first boundary block line in Figure 7. Figures 9 to 11 are schematic diagrams showing the first to third modified examples of the first boundary block line in Figure 8.

[0075] Referring to Figure 7, the plurality of first block lines 21 in this embodiment may include a first boundary block line 21a facing the end 11a of the gas inlet 11 and forming a boundary with the second block section 30, and a second boundary block line 21b facing the end 12a of the gas outlet 12 and forming a boundary with the third block section 40.

[0076] Here, the first boundary block line 21a may include a plurality of first a block members 211a arranged at intervals G11a, and a plurality of first a mixing sections 212a formed by the intervals G11a and fluidly connected to a plurality of first flow channels 22.

[0077] Referring to Figures 8 to 11, the first block member 211a forming the first boundary block line 21a in this embodiment may include one or more of the following: a straight rib-shaped block, a columnar block, and a corrugated rib-shaped block.

[0078] Referring to Figure 8, the first a1 boundary block line 21a1 may include a plurality of first a1 linear rib-shaped block members 211a1, and a plurality of first a1 mixed portions 212a1 formed between the plurality of first a1 linear rib-shaped block members 211a1 arranged at intervals of 11a1 G11a1.

[0079] Referring to Figure 9, the first a2 boundary block line 21a2 includes a plurality of first a21 linear rib-shaped block members 211a21, and a plurality of first a22 columnar block members 211a22 arranged between the plurality of first a21 linear rib-shaped block members 211a21, and the first a2 rib-shaped block member 211a22, and the 11a2 spacing G11a2 Multiple 1a21 linear rib-shaped block members arranged in this manner 211a21 It can include a plurality of 12a2 mixed portions 212a2 formed between the plurality of 1a22 columnar block members 211a22 and a plurality of 12a2 mixed portions 212a2.

[0080] Referring to Figure 10, the first a3 boundary block line 21a3 may include a plurality of first a3 corrugated rib-shaped block members 211a3, and a plurality of first a3 mixed portions 212a3 formed between the plurality of first a3 corrugated rib-shaped block members 211a3 arranged at intervals of 11a3 G11a3.

[0081] Referring to Figure 11, the first a4 boundary block line 21a4 includes a plurality of first a41 corrugated rib-shaped block members 211a41 and a plurality of first a42 columnar block members 211a42 positioned between the plurality of first a41 corrugated rib-shaped block members 211a41. 211t4 , and the 11a4 interval G11a4 It may include a plurality of first a4 mixing portions 212a4 formed between a plurality of first a41 corrugated rib-shaped block members 211a41 and a plurality of first a42 columnar block members 211a42 arranged in a certain manner.

[0082] However, the first boundary block line 21a and the first block member 211a forming it according to this embodiment are not limited to the shapes and arrangements described in Figures 8 to 11 and the related explanatory sections, and can be modified to include block members having other shapes and block lines in which such block members are arranged in various orders.

[0083] Furthermore, the second boundary block line 21b according to this embodiment may include a plurality of first b block members 211b arranged at intervals G11b, and a plurality of first b mixing sections 212b formed by the intervals G11b and fluidly connected to a plurality of first flow channels 22.

[0084] Herein, the part relating to this embodiment 2 The arrangement and shape (not shown) of the boundary block line 21b and the 1b block member 211b are as described above. 1 Since the boundary block line 21a and the 1a block member 211a may have the same arrangement and shape, a detailed explanation of them will be omitted.

[0085] Figure 12 schematically shows the change in the angle between the first centerline CL and the first and second boundary block lines as a result of the lengths of the first and second boundary block lines in Figure 2, as well as the gas inlet and gas outlet.

[0086] Referring to Figure 12, the first block section 20, the second block section 30, and the third block section 40 in this embodiment can form a power generation region EGA where electricity is produced.

[0087] Furthermore, the power generation region EGA according to this embodiment may include an 11th side EGA11 facing the gas inlet 11, a 12th side EGA12 located on the opposite side of the 11th side EGA11 and facing the gas outlet 12, and a 13th side EGA13 and a 14th side EGA14 that connect the 11th side EGA11 and the 12th side EGA12 and are located on opposite sides of each other.

[0088] Furthermore, the power generation region EGA may include a first point W1 located at a distance of W1 interval WG1 from the point where the 11th edge EGA11 and the 13th edge EGA13 intersect, a second point W2 located at the point where the 12th edge EGA12 and the 13th edge EGA13 intersect, a third point W3 located at a distance of W2 interval WG2 from the point where the 12th edge EGA12 and the 14th edge EGA14 intersect, and a fourth point W4 located at the point where the 11th edge EGA11 and the 14th edge EGA14 intersect.

[0089] In the following, the diagonal inclination of the first boundary block line 21a will be described in detail with reference to the first center line CL in this embodiment.

[0090] The first boundary block line 21a in this embodiment may include an eleventh end 21aE1 facing the end 11a of the gas inlet 11, and a twelfth end 21aE2 located on the opposite side of the eleventh end 21aE1.

[0091] As shown in Figure 12, the angle between the first boundary block line 21a and the first center line CL is the position of the 11th side EGA11 of the 11th end 21aE1 of the first boundary block line 21a, and the position of the 12th end 21aE2 13-sided EGA13 It can have variable values ​​depending on its position.

[0092] For details, see the first boundary block line 21a. 12th end 21aE2The position of the 13th side EGA13 can be located between the first point W1 and the second point W2, and the first point W1 can be located at a point on the 13th side EGA13 that is 0.05EL1(cm) away from the 11th side EGA11, when the length of the 13th side EGA13 is EL1(cm).

[0093] Furthermore, the position of the 11th end 21aE1 of the first boundary block line 21a at the 11th side EGA11 can be located between the end 11a of the gas inlet 11 and the fourth point W4, due to the change in the position of the end 11a of the gas inlet caused by the change in the length of the gas inlet 11.

[0094] Referring to Figure 12, the maximum angle formed by the first boundary block line 21a and the first center line CL in this embodiment is the first maximum angle wα1, and the minimum angle formed by the first boundary block line 21a and the first center line CL may be the first minimum angle wα2.

[0095] Therefore, the first boundary block line 21a and the first center line CL in this embodiment can form an angle between the first minimum angle wα2 and the first maximum angle wα1.

[0096] In more detail, in this embodiment, when the 11th end 21aE1 of the first boundary block line 21a faces the end 11a of the gas inlet 11, and the 12th end 21aE2 of the first boundary block line 21a is located at the first point W1 of the 13th side EGA13, the first boundary block line 21a and the first center line CL can form the maximum angle, which is the first maximum angle wα1.

[0097] Here, the first maximum angle wα1 formed by the first boundary block line 21a and the first center line CL may be a value between 85° and 88°.

[0098] Furthermore, in this embodiment, when the 11th end 21aE1 of the first boundary block line 21a faces the end 11a of the gas inlet 11, and the 12th end 21aE2 of the first boundary block line 21a is located at the second point W2 of the 13th side EGA13, the first boundary block line 21a and the first center line CL can form the minimum angle, which is the first minimum angle wα2.

[0099] Here, the first minimum angle wα2 formed by the first boundary block line 21a and the first center line CL may be a value between 6° and 8°.

[0100] In the following, the diagonal inclination of the second boundary block line 21b will be described in detail with reference to the first center line CL in this embodiment.

[0101] The second boundary block line 21b in this embodiment may include a 21st end 21bE1 facing the end 12a of the gas outlet 12, and a 22nd end 21bE2 located on the opposite side of the 21st end 21bE1.

[0102] As shown in Figure 12, the angle between the second boundary block line 21b and the first center line CL can have a variable value depending on the position of the 21st end 21bE1 of the second boundary block line 21b at the 12th side EGA12 and the 22nd end 21bE2 at the 14th side EGA14.

[0103] For details, see the second boundary block line 21b. 22nd end 21bE2 The positions on the 14th edge EGA14 are the 3rd point W3 and the 4th point W4 It can be located between the two points, and the third point W3 can be located at a point on the 14th side EGA14 that is 0.05EL2(cm) away from the 12th EGA12, when the length of the 14th side EGA14 is EL2(cm).

[0104] Furthermore, the position of the 21st end 21bE1 of the second boundary block line 21b at the 12th side EGA12 can be located between the end 12a of the gas outlet 12 and the third point W3, due to the change in the position of the end 12a of the gas outlet caused by the change in the length of the gas outlet 12.

[0105] Referring to Figure 12, according to this embodiment, the maximum angle between the second boundary block line 21b and the first center line CL is the second maximum angle wα3, and the minimum angle between the second boundary block line 21b and the first center line CL is the second minimum angle wα4.

[0106] Therefore, the second boundary block line 21b and the first center line CL in this embodiment can form an angle between the second minimum angle wα4 and the second maximum angle wα3.

[0107] In more detail, when the 21st end 21bE1 of the second boundary block line 21b in this embodiment faces the end 12a of the gas outlet 12, and the 22nd end 21bE2 of the second boundary block line 21b is located at the third point W3 of the 14th side EGA14, the second boundary block line 21b and the first center line CL can form the second maximum angle wα3, which is the maximum angle.

[0108] Here, the second maximum angle wα3 formed by the second boundary block line 21b and the first center line CL may be a value between 85° and 88°.

[0109] Furthermore, when the 21st end 21bE1 of the second boundary block line 21b in this embodiment faces the end 12a of the gas outlet 12, and the 22nd end 21bE2 of the second boundary block line 21b is located at the 4th point W4 of the 14th side EGA14, the second boundary block line 21b and the first center line CL can form the minimum angle, which is the second minimum angle wα4.

[0110] Here, the second minimum angle wα4 formed by the second boundary block line 21b and the first center line CL may be a value between 6° and 8°.

[0111] In this embodiment, the angle formed by the first boundary block line 21a and the first center line CL, and the angle formed by the second boundary block line 21b and the first center line CL, may be the same or different from each other, depending on the embodiment.

[0112] Furthermore, in this embodiment, each of the multiple first block lines 21 of the first block section 20 and the first center line CL can form an angle between the first minimum angle wα2 and the first maximum angle wα1, or between the second minimum angle wα4 and the second maximum angle wα3.

[0113] Here, the angles formed between each of the multiple first block lines 21 of the first block section 20 in this embodiment and the first center line CL may be the same or different depending on the embodiment.

[0114] Furthermore, the angles formed between each of the multiple first block lines 21 of the first block section 20 in this embodiment and the first center line CL, and the angles formed between the first and second boundary block lines 21a and 21b, may be the same or different depending on the embodiment.

[0115] Figures 13 to 16 schematically show the changes in the area of ​​the first block section 20, the second block section 30, and the third block section 40 due to the change in the angle between the first center line CL and the first and second boundary block lines in Figure 12.

[0116] According to this embodiment, the first boundary block line 21a can form a second angle α2 with the first center line CL, and the second boundary block line 21b can form a third angle α3 with the first center line CL.

[0117] The second angle α2 and the third angle α3 are the diagonal inclinations of the first boundary block line 21a and the second boundary block line 21b, which are installed between the gas inlet 11 and the gas outlet 12, which are arranged diagonally, and can be acute angles greater than 0° and less than 90°.

[0118] Here, the area ratio (%) of the area of ​​the first block section 20, the second block section 30, and the third block section 40 in relation to the total area of ​​the block section, which is the sum of the areas of the first block section 20, the second block section 30, and the third block section 40, can be changed by changing one or more of the second angle α2, the third angle α3, the inlet length L1 of the gas inlet 11, and the outlet length L2 of the gas outlet 12.

[0119] Referring to Figure 13, the area of ​​the first block section 20, which is divided by the first boundary block line 21a forming a second angle α2 with the first center line CL, and the second boundary block line 21b forming a third angle α3 with the first center line CL, is A1, the area of ​​the second block section 30 is A2, and the area of ​​the third block section 40 is A3.

[0120] Referring to Figures 13 and 14, the angle between the first a1 boundary block line 21a1 and the first center line CL is the same as the second angle α2, which is the angle between the first boundary block line 21a and the first center line CL, and the angle between the second a1 boundary block line 21b1 and the first center line CL is the same as the third angle α3, which is the angle between the second boundary block line 21b and the first center line CL.

[0121] However, the length L1a1 of the first a1 inlet 11a1 was deformed to be shorter than the length L1 of the first inlet 11.

[0122] Thus, when the length L1a1 of the first a1 inlet 11a1 becomes shorter than the length L1 of the first inlet 11, Figure 14 As shown, the area A2a1 of the first block portion 30a1 is larger than the area A2 of the second block portion 30 in Figure 13.

[0123] Furthermore, the length L2a1 of the 2a1 outlet 12a1 is the same as the 1st outlet 12 It was deformed so that its length was shorter than the outlet length L2.

[0124] Thus, the length L2a1 of the 2a1 outlet 12a1 is the same as the 1st outlet 12 When it becomes shorter than the outlet length L2, the area A3a1 of the second a1 block section 40a1 becomes larger than the area A3 of the third block section 40 in Figure 13, as shown in Figure 14.

[0125] Here, as the area A2a1 of the first a1 block section 30a1 and the area A3a1 of the second a1 block section 40a1 increase, the area A1a1 of the third a1 block section 20a1 decreases.

[0126] Therefore, according to this embodiment, the first a1 inlet length L1a1 of the first a1 inlet 11a1 is deformed to be shorter than the inlet length L1 of the first inlet 11, and the second a1 outlet length L2a1 of the second a1 outlet 12a1 is shortened to the first outlet 12 By deforming it so that it is shorter than the outlet length L2, the ratio (%) of the 1a1 area A2a1 of the 1a1 block section 30a1 and the 2a1 area A3a1 of the 2a1 block section 40a1 in the total area of ​​the block section can be increased, and the ratio (%) of the 3a1 area A1a1 of the 3a1 block section 20a1 can be decreased.

[0127] Referring to Figures 13 and 15, the inlet length L1 of gas inlet 11 and the first a2 length L1a2 of the first a2 inlet 11a2 are the same, and the outlet length L2 of gas outlet 12 and the second a2 length L2a2 of the second a2 gas outlet 12a2 are the same.

[0128] However, the first a2 angle α2a2 formed by the first a2 boundary block line 21a2 and the first center line CL was modified to be larger than the second angle α2 formed by the first boundary block line 21a and the first center line CL.

[0129] As the first a2 angle α2a2 becomes larger than the second angle α2, the first a2 area A2a2 of the first a2 block portion 30a2 becomes smaller than the second area A2 of the second block portion 30 in Figure 13, as shown in Figure 15.

[0130] Furthermore, the second a2 angle α3a2 formed by the second a2 boundary block line 21b2 and the first center line CL was deformed so that it was greater than the third angle α3 formed by the second boundary block line 21b and the first center line CL.

[0131] As the second a2 angle α3a2 becomes larger than the third angle α3, the second a2 area A3a2 of the second a2 block portion 40a2 becomes smaller than the third area A3 of the third block portion 40 in Figure 13, as shown in Figure 15.

[0132] Here, the area A2a2 of the first a2 block section 30a2 and the area A2a2 of the second a2 block section 40a2 A3a2 As this decreases, the area A1a2 of the third a2 block section 20a2 increases.

[0133] Therefore, according to this embodiment, by making the first a2 angle α2a2 formed by the first a2 boundary block line 21a2 and the first center line CL larger than the second angle α2 formed by the first boundary block line 21a and the first center line CL, and by making the second a2 angle α3a2 formed by the second a2 boundary block line 21b2 and the first center line CL larger than the third angle α3 formed by the second boundary block line 21b and the first center line CL, the ratio (%) occupied by the first a2 area A2a2 of the first a2 block section 30a2 and the second a2 area A3a2 of the second a2 block section 40a2 in the total area of ​​the block section can be reduced, and the ratio (%) occupied by the third a2 area A1a2 of the third a2 block section 20a2 can be increased.

[0134] Referring to Figures 13 and 16, the inlet length L1a3 of the first a3 inlet 11a3 was deformed to be shorter than the inlet length L1 of the first inlet 11, and the outlet length L2a3 of the second a3 outlet 12a3 was deformed to be shorter than the outlet length L2 of the first outlet 12.

[0135] Furthermore, the first a3 angle α2a3 formed by the first a3 boundary block line 21a3 and the first center line CL is deformed to be larger than the second angle α2 formed by the first boundary block line 21a and the first center line CL, and the second a3 angle α3a3 formed by the second a3 boundary block line 21b3 and the first center line CL is 2 Boundary block line 21b and the first centerline CL 3 angle α3 It was deformed to become larger than that.

[0136] Thus, the length of the first a3 inlet L1a3 and the second a3 Outlet If the length L2a3 is deformed to be shorter, and the first a3 angle α2a3 and the second a3 angle α3a3 are deformed to be larger, then the first a3 area A2a3 of the first a3 block portion 30a3 and the second a3 area of ​​the second a3 block portion 40a3 will be larger. A3a3 The number of blocks in the third block section 20a3 decreases, and relatively the number of blocks in the third block section 20a3 3a3 The area A1a3 will increase.

[0137] Therefore, according to this embodiment, the length of the first a3 inlet L1a3 is made shorter than the inlet length L1 of the first inlet 11, the length of the second a3 outlet L2a3 is made shorter than the outlet length L2 of the first outlet 12, the first a3 angle α2a3 is made greater than the second angle α2 formed by the first boundary block line 21a and the first center line CL, and the second a3 angle α3a3 is made 2 Boundary block line 21b The third angle formed by the first centerline CL α3 By making it larger than this, the ratio (%) of the 1a3 area A2a3 of the 1st a3 block section 30a3 and the 2a3 area A3a3 of the 2nd a3 block section 40a3 in the total area of ​​the block section can be reduced, while the ratio (%) of the 3a3 area A1a3 of the 3rd a3 block section 20a3 can be increased.

[0138] According to the fuel cell separator plate 100 of this embodiment, more energy is produced in the first block section 20, which is installed diagonally between the gas inlet 11 and the gas outlet 12, than in the second block section 30 and the third block section 40. Therefore, depending on the area ratio (%) of the first block section 20 to the total area of ​​the block sections, it can be used as a fuel cell separator plate suitable for either a mobility device or an energy storage device.

[0139] In more detail, if the area ratio (%) of the second block section 30 and the third block section 40 of the fuel cell separation plate 100 increases, and the area ratio (%) of the first block section 20 decreases, the gas transfer speed per unit time increases in the first block section 20, where the gas passage area has decreased. This increases the amount of energy supplied per unit time, thus enabling the production of rapid energy, i.e., high energy per unit time. Therefore, the fuel cell separation plate 100 in which the area ratio (%) of the first block section 20 has decreased according to this embodiment can be used in mobility devices such as automobiles and drones, which have large energy fluctuations per unit time.

[0140] Conversely, if the area ratio (%) of the second block section 30 and the third block section 40 of the fuel cell separation plate 100 decreases and the area ratio (%) of the first block section 20 increases, the gas supply area and gas diffusion area in the first block section 20, which has a larger gas passage area, will increase, and thus higher energy can be produced per unit area. Therefore, the fuel cell separation plate 100 with an increased area ratio (%) of the first block section 20 according to this embodiment can be used in stationary power generation fuel cells such as energy storage devices that have little load variability and require continuous energy production.

[0141] The mechanism for adjusting the fluidity of the flow field based on the area ratio (%) of the first block section 20, the second block section 30, and the third block section 40 will be explained in detail in the sections related to Figures 23 and 24.

[0142] Figure 17 is a schematic diagram showing the second and third block sections of Figure 1, and Figure 18 is a schematic diagram showing the second block line of the second block section of Figure 17. Also, Figures 19 to Figure 21 This is the third in Figure 18. 2 This diagram schematically shows the first to third modified examples of the second block line of the block section.

[0143] Referring to Figure 17, the second block portion 30 in this embodiment forms a fourth angle α4 with the first side 1 of the main body 10 and the first center line CL that penetrates the center point of the main body 10 perpendicularly, and 22 It includes a plurality of second block lines 31 arranged at intervals G22, and a plurality of second flow paths 32 formed between the plurality of second block lines 31.

[0144] Unlike the first angle α1, the second angle α2, and the third angle α3, which are acute angles, the fourth angle α4 can have a value between 0° and 360° as the inclination of the second block line 31 with respect to the first center line CL. Therefore, as shown in Figure 22, the second block member 311 can have various shapes and arrangements.

[0145] Here, the angles formed by the first center line CL and each of the multiple second block lines 31 may be the same or different from each other. By adjusting the angles formed by the first center line CL and each of the multiple second block lines 31, the width of the flow path and the area of ​​the flow path can be adjusted, thereby controlling the velocity and flow rate of the fluid passing through the second block section 30.

[0146] Furthermore, each of the multiple second block lines 31 may include a plurality of second block members 311 arranged at a 21st interval G21, and a plurality of second mixing sections 312 formed by the 21st interval G21 and fluidly connecting the plurality of second flow paths 32.

[0147] As shown in Figure 17, each of the multiple second block lines 31 can be formed by aligning each of the multiple second block members 311 at a certain distance from one another, with each of them forming an angle with the first center line CL.

[0148] Furthermore, in the multiple second mixing sections 312 formed between the multiple second block members 311 arranged at a 21st interval G21, multiple second flow channels 32 formed at a 22nd interval G22 between the multiple second block lines 31 are fluidically connected, and turbulence can be generated in the second mixing section 312 to fluidly connect the multiple second flow channels 32.

[0149] Furthermore, among the multiple second flow channels 32, the second flow channel 32 that contacts the first boundary block line 21a can be fluidly connected to the first block section 20 via the first a mixing section 212a formed in the first boundary block line 21a.

[0150] According to the second block section 30 of this embodiment, a stagnant flow field with different flow velocity and direction can be formed compared to the diagonal flow field formed between the gas inlet 11 and the gas outlet 12.

[0151] The stagnant flow field formed in the second block section 30 will be explained in detail in the sections related to Figures 24 and 25.

[0152] Referring to Figures 18 to 21, the second block member 311 forming the second block line 31 in this embodiment may include one or more of the following: a straight rib-shaped block, a columnar block, and a corrugated rib-shaped block.

[0153] In the following sections, detailed explanations will be omitted for parts that are common to those explained with reference to Figure 17, and only the necessary parts will be briefly explained.

[0154] Figure 18 is a schematic diagram showing the second block line of the second block section in Figure 17.

[0155] Referring to Figure 18, each of the multiple second a1 block lines 31a1 may include multiple second a1 linear rib-shaped block members 311a1, and multiple second a1 mixed portions 312a1 formed between the multiple second a1 linear rib-shaped block members 311a1 arranged at a 21a1 interval G21a1.

[0156] Furthermore, multiple second a1 block lines 31a1 can be arranged at a 22a1 interval G22a1 to form multiple second a1 flow channels 32a1, and some of the multiple second a1 mixing sections 312a1 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0157] Figure 19 is a schematic diagram showing a first modified example of the second block line of the second block section in Figure 18.

[0158] Referring to Figure 19, each of the multiple second a2 block lines 31a2 may include a second a2 rib-shaped block member 311a2, which includes a multiple second a21 linear rib-shaped block member 311a21 and a multiple second a22 columnar block member 311a22 arranged between the multiple second a21 linear rib-shaped block members 311a21, as well as a multiple second a2 mixed portion 312a2 formed between the multiple second a21 linear rib-shaped block members 311a21 and the multiple second a22 columnar block members 311a22 arranged at a 21a2 interval G21a2.

[0159] Also, multiple 2a2 block lines 31 a2 can be arranged at a 22a2 interval G22a2 to form a plurality of 2a2 flow channels 32a2, and some of the plurality of 32a2 mixing sections 312a2 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0160] Figure 20 is a schematic diagram showing a second modified example of the second block line of the second block section in Figure 18.

[0161] Referring to Figure 20, each of the multiple second a3 block lines 31a3 can include multiple second a31 corrugated rib-shaped block members 311a3, and multiple third a3 mixed portions 312a3 formed between the multiple second a31 corrugated rib-shaped block members 311a3 arranged at a 21a3 interval G21a3.

[0162] Furthermore, multiple second a3 block lines 31a3 can be arranged at a 22a3 interval G22a3 to form multiple second a3 flow channels 32a3, and some of the multiple 32a3 mixing sections 312a3 can be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0163] Figure 21 is a schematic diagram showing a third modified example of the second block line of the second block section in Figure 18.

[0164] Referring to Figure 21, each of the multiple second a4 block lines 31a4 is a second a4 mixed rib-shaped block member 311a44 including multiple second a41 corrugated rib-shaped block members 311a41 and multiple second a42 columnar block members 311a42 arranged between the multiple second a41 corrugated rib-shaped block members 311a41, and multiple second a4 mixed portions formed between the multiple second a41 corrugated rib-shaped block members 311a41 and the multiple second a42 columnar block members 311a42 arranged at a 21a4 interval G21a4. 312a4 It can include...

[0165] Furthermore, multiple 2a4 block lines 31a4 are separated by 22a4 intervals. G22a4 Multiple 2a4 channels are arranged in this manner. 32a4 It can form multiple 2a4 Mixing section 312a4 Some of these may be arranged to be aligned in a straight line in the direction of a virtual line (not shown) perpendicular to the first center line CL.

[0166] However, the second block line 31 and the second block members 311 comprising it according to this embodiment are not limited to the shapes and arrangements shown in Figures 18 to 21 and the related explanatory sections, and can be modified to include block members of other shapes and block lines in which such block members are arranged in various orders.

[0167] Figure 22 schematically shows several different modifications of the second block line of the second block section in Figure 18.

[0168] Referring to Figure 22, in addition to the shapes and arrangements described in Figures 18 to 21 and the related explanatory sections, the second block member 311 may also include crescent-shaped ribs (A), bent short ribs (B), dot-shaped ribs (C), vertically bent long ribs (D), wavy long ribs (E), and mixed ribs of short ribs and bent ribs (F).

[0169] Furthermore, the third block portion 40 in this embodiment forms a fifth angle α5 with the first side 1 of the main body and the first center line CL that penetrates the center point of the main body perpendicularly. 31 It may include a plurality of third block lines 41 arranged at intervals G31, and a plurality of third flow channels 42 formed between the plurality of third block lines 41.

[0170] Unlike the first angle α1, the second angle α2, and the third angle α3, which are acute angles, the fifth angle α5 can have a value between 0° and 360° as the inclination of the third block line 41 with respect to the first center line CL, and as shown in Figure 22, the third block member 411 can have various shapes and arrangements.

[0171] Here, the angles formed by the first center line CL and each of the multiple third block lines 41 may be the same or different from each other. By adjusting the angles formed by the first center line CL and each of the multiple third block lines 41, the width of the flow path and the area of ​​the flow path can be adjusted, thereby controlling the velocity and flow rate of the fluid passing through the third block section 40.

[0172] Also, multiple third block lines 41 Each of these may include a plurality of third block members 411 arranged at 31 intervals G31, and a plurality of third mixing sections 412 formed by the 31 intervals G31 and fluidly connecting a plurality of third flow channels 42.

[0173] As shown in Figure 17, each of the multiple third block lines 41 can be formed by aligning each of the multiple third block members 411 at a certain distance from one another, with each of them forming an angle with the first center line CL.

[0174] Furthermore, in the multiple third mixing sections 412 formed between the multiple third block members 311 arranged at a 31st interval G31, multiple third flow channels 42 formed at a 32nd interval G32 are fluidically connected between the multiple third block lines 41, and turbulence can be generated in the third mixing section 412 to fluidly connect the multiple third flow channels 42.

[0175] Furthermore, among the multiple third flow channels 42, the third flow channel 42 that contacts the second boundary block line 21b can be fluidly connected to the first block section 20 via the first b mixing section 212b formed in the second boundary block line 21b.

[0176] According to the third block section 40 of this embodiment, a stagnant flow field with different flow velocity and direction can be formed compared to the diagonal flow field formed between the gas inlet 11 and the gas outlet 12.

[0177] The stagnant flow field formed in the third block section 40 will be explained in detail in the sections related to Figures 24 and 25.

[0178] Here, the third block line 41 and 3 The arrangement and shape (not shown) of the block members 411 may be the same as that of the second block line 31 and the second block members 311 described above, so a detailed explanation of this is omitted.

[0179] Figure 23 is a schematic diagram showing the fluid flow in the first and second block sections of the fuel cell separation plate in Figure 1, and Figure 24 is a schematic diagram showing the combined flow field formed in the fuel cell separation plate in Figure 1 by the fluid flow in Figure 23.

[0180] Referring to Figure 23, the air (Air(O2)) flowing into the gas inlet 11 can pass through a plurality of first channels 22 formed diagonally in the first block section 20 and become multiple main flow MFs heading towards the gas outlet 12 located diagonally opposite. These diagonally formed main flow MFs can be fluidically connected to one another by a plurality of first mixing sections 212 where a first turbulent flow TF1 is generated, and can develop into a diagonal first flow field.

[0181] Referring to Figure 24, the first flow field formed in the first block section 20 may include a first linear diagonal flow field LF1, a first curved diagonal flow field CF1, and a second curved diagonal flow field CF2.

[0182] The first linear diagonal flow field LF1 may be formed along an imaginary line IL connecting the centers of the opposing sides of the gas inlet 11 and the gas outlet 12.

[0183] More specifically, the first linear diagonal flow field LF1 can develop into a linear flow field where multiple main flows MF located on either side of the imaginary line IL are connected to each other by multiple first mixing sections 212, and flow diagonally between the gas inlet 11 and the gas outlet 12. In other words, the first linear diagonal flow field LF1 can be formed by the flow of multiple main flows MF exhibiting a linear diagonal flow pattern around the imaginary line IL between the gas inlet 11 and the gas outlet 12 located diagonally opposite each other.

[0184] A first curved diagonal flow field CF1 may be formed between the second block section 30 and the first linear diagonal flow field LF1, with the second block section 30 serving as the boundary.

[0185] More specifically, the first curved diagonal flow field CF1 can develop into a curved flow field in which multiple main flows MF, connected to each other by multiple first mixing sections 212 between the first linear diagonal flow field LF1 and the first boundary block line 21a and the fourth side 4, flow diagonally between the gas inlet 11 and the gas outlet 12. That is, as shown in Figure 24, the first curved diagonal flow field CF1 can be formed by the flow of multiple main flows MF formed in the curved section between the first linear diagonal flow field LF1 and the first boundary block line 21a and the fourth side 4.

[0186] Furthermore, a second curved diagonal flow field CF2 may be formed between the third block section 40 and the first linear diagonal flow field LF1, with the third block section 40 serving as the boundary.

[0187] More specifically, the second curved diagonal flow field CF2 can develop into a curved flow field in which multiple main flows MF, connected to each other by multiple first mixing sections 212 between the first linear diagonal flow field LF1 and the second boundary block line 21b and the third side 3, flow diagonally between the gas inlet 11 and the gas outlet 12. That is, as shown in Figure 24, the second curved diagonal flow field CF2 can develop into a curved flow field in which multiple main flows MF, connected to each other by multiple first mixing sections 212 between the first linear diagonal flow field LF1 and the second boundary block line 21b and Third side 3 It can be formed by the flow of multiple main flow (Mainflow) MFs in the curved section formed between the two.

[0188] However, the gas flow generated in the boundary regions (not shown) between the first curved diagonal flow field CF1 and the second flow field and the first linear diagonal flow field LF1 formed in the second block section 30 does not form independent flow fields like the first to third flow fields, so a detailed explanation of this is omitted.

[0189] Referring again to Figure 23, the gas (e.g., air (O2)) flowing into the gas inlet 11 can be supplied to the second block section 30 via the side of the second block section 30 adjacent to the end 11a of the gas inlet 11, and via the first a mixing section 212a of the first boundary block line 21a. Here, as shown in Figure 22, the gas (e.g., air (O2)) supplied to the second block section 30 via the first a mixing section 212a of the first boundary block line 21a is turbulent, and this supplied turbulent flow again fluidly connects the multiple mixing sections of the multiple second flow paths 32. 312 It is supplied as turbulent flow to each of the multiple second channels 32 via this channel.

[0190] Also, the gas inlet 11 and the first block section 20 Since the gas (e.g., air (O2)) flows in opposite directions, most of the gas (e.g., air (O2)) flowing into the gas inlet 11 is supplied to the first block section 20 via the first flow path 22, and the second block section 30 is located away from the end 11a of the gas inlet 11, so the first block section 20 A very small amount of gas (e.g., air (O2)) excluding the air supplied to the first block is supplied to the side surface of the second block section 30.

[0191] Therefore, a second flow field is formed in the second block section 30, which is installed adjacent to the first corner region A1 of the first side 1 of the main body 10, due to the complex turbulent flow described above.

[0192] Referring again to Figure 24, the second flow field formed in the second block section 30 can include a plurality of first turbulent stationary flow fields TSF1 directed toward the first corner region A1, a plurality of second turbulent stationary flow fields TSF2 returning from the first corner region A1, and a plurality of third turbulent stationary flow fields TSF3 formed in a direction away from the first corner region A1.

[0193] Furthermore, a third flow field may be formed in the third block section 40. However, the second flow field formed in the second block section 30 and the third flow field formed in the third block section 40 are formed by the same mechanism, and the flow fields constituting the third flow field and the flow fields constituting the second flow field are identical to each other, so a detailed explanation of the third flow field is omitted.

[0194] The fluidity of the first linear diagonal flow field LF1 and the first and second curved diagonal flow fields CF1 and CF2 described above, including the flow velocity (flow rate), can be adjusted by variations in the length L1 of the gas inlet 11 and the length L2 of the gas outlet, the second and third angles α2 and α3 formed between the first and second boundary block lines 21a and 21b and the first centerline CL, and the first angle α1 formed between each of the multiple first block lines 21 and the first centerline CL.

[0195] Referring again to Figures 13 to 16, the length L1 of the gas inlet 11 and the length of the gas outlet L2 As this decreases, the area ratio (%) of the second block section 30 and the third block section 40 of the fuel cell separation plate 100 increases, and the area ratio (%) of the first block section 20 decreases.

[0196] As the area ratio (%) of the first block section 20 decreases, the curved sections in which the first and second curved diagonal flow fields CF1 and CF2 are formed also decrease. Consequently, the first and second curved diagonal flow fields CF1 and CF2 also decrease, and the ratio of movement of the gas flowing into the first block section 20 due to the first linear diagonal flow field LF1 increases.

[0197] Here, the distance the gas travels between the gas inlet 11 and the gas outlet 12 is shorter in the first linear diagonal flow field LF1 than in the first and second curved diagonal flow fields CF1 and CF2. Therefore, if the proportion of gas movement due to the first linear diagonal flow field LF1 increases, the gas movement speed per unit time and the amount of energy supplied per unit time to the first block section 20 can be increased.

[0198] Therefore, the fuel cell separation plate 100 according to this embodiment can be selectively applied to mobility devices, energy storage devices, and the like, as its fluidity, including the flow velocity (flow rate) of the first linear diagonal flow field LF1 and the first and second curved diagonal flow fields CF1, CF2, can be adjusted by the length L1 of the gas inlet 11, the length L2 of the gas outlet, the second and third angles α2 and α3 formed between the first and second boundary block lines 21a and 21b and the first centerline CL, and the value of the first angle α1 formed between each of the plurality of first block lines 21 and the first centerline CL.

[0199] Figure 25 is a schematic diagram showing the fluid and H2O flow paths in a fuel cell cell including the fuel cell separator plate of Figure 1, Figure 26 is a schematic diagram showing the fluid and H2O flow paths in the fuel cell separator plate of Figure 1 in the fuel cell cell of Figure 25, and Figure 27 is a diagram. 25 This diagram schematically shows the fluid and H2O flow paths in the fuel cell separation plate into which hydrogen flows in a fuel cell cell.

[0200] Referring to Figure 25, the fuel cell cell 1000 can consist of a fuel cell cathode separator 100a, a fuel cell anode separator 200a installed on the opposite side of the fuel cell cathode separator 100a, a membrane electrode assembly (MEA) 300a located between the fuel cell cathode separator 100a and the fuel cell anode separator 200a, a first gasket 400a and a first diffusion layer 500a located between the fuel cell cathode separator 100a and the membrane electrode assembly (MEA) 300a, and a second gasket 600a and a second diffusion layer 700a located between the fuel cell anode separator 200a and the membrane electrode assembly (MEA) 300a.

[0201] Here, book Examples The fuel cell separator plate 100 and the fuel cell cathode separator plate 100a included in the fuel cell cell 1000 have the same configuration. However, the fuel cell of cell 1000 Cathode The block lines of the separation plate 100a are not limited to those formed to form an angle with the first center line CL, but may be formed in a direction parallel to the first center line CL, or may be formed as a meandering flow channel structure that does not form a certain angle with the first center line CL.

[0202] If the H2O generated in the membrane electrode assembly 300a during the operation of the fuel cell cell 1000 is not smoothly discharged, and an H2O flooding phenomenon occurs, the power generation efficiency of the fuel cell cell 1000 may decrease or it may cause a malfunction.

[0203] Furthermore, if excessive H2O generated in the membrane electrode assembly 300a is discharged during the operation of the fuel cell cell 1000, causing the membrane electrode assembly 300a to dry out, the power generation efficiency may decrease, or the membrane electrode assembly 300a may be damaged.

[0204] The H2O flooding phenomenon of the membrane electrode assembly 300a and the drying phenomenon of the membrane electrode assembly described above can be prevented by the first block section 20 in which a first flow field consisting of a first linear diagonal flow field LF1, a first curved diagonal flow field CF1, and a second curved diagonal flow field CF2 is formed, and by the second block section 30 and the third block section 40 in which second and third flow fields consisting of a plurality of turbulent stagnant flow fields are formed.

[0205] In the following section, with reference to Figures 25 to 27, the prevention of H2O flooding and drying of the membrane electrode assembly by the fuel cell separation plate 100 will be explained in detail.

[0206] As shown in Figure 25, when air (O2) is supplied to the fuel cell cathode separator plate 100a, a portion of the supplied air (O2) moves to the membrane electrode assembly 300a via the first diffusion layer 500a. Also, when hydrogen (H2) is supplied to the fuel cell anode separator plate 200a, the supplied hydrogen (H2) moves to the membrane electrode assembly 300a via the first diffusion layer 500a. - +2H + It is broken down into the second diffusion layer 700a Air (O2) (1 / 2O2) and hydrogen (H2) (2e) move to the membrane electrode assembly 300a via this. - +2H + ) combines at the membrane electrode assembly 300a to produce H2O. The H2O produced at the membrane electrode assembly 300a is supplied to the membrane electrode assembly 300a but does not react with hydrogen (H2) and is discharged along with the air (Air(O2)) that is discharged to the fuel cell cathode separator plate 100a via the first gas diffusion layer 500a ((1)).

[0207] In this embodiment, in the first block section 20 of the fuel cell separation plate 100, the H2O generated in the membrane electrode assembly 300a facing the first block section 20 can be smoothly discharged by laminar flow in the first channel 22 and turbulence generated in the multiple first mixing sections 212. In addition, in the second and third block sections 30 and 40, the H2O generated in the membrane electrode assembly 300a can be smoothly discharged by the turbulent stagnant flow field formed by the multiple second and third mixing sections 312 and 412 and the multiple second and third channels 32 and 42.

[0208] Therefore, according to the fuel cell separation plate 100 of this embodiment, H2O generated at the membrane electrode assembly 300a is smoothly discharged in the first to third block sections 20, 30, and 40, thus preventing the flooding phenomenon of H2O at the membrane electrode assembly 300a.

[0209] The H2O thus discharged can move diagonally through a first flow field (see Figure 23) formed on the fuel cell cathode separator plate 100a, which includes a first linear diagonal flow field LF1, a first curved diagonal flow field CF1, and a second curved diagonal flow field CF2, and be discharged through the gas outlet 12 ((2)).

[0210] The region (a) of the fuel cell cathode separator plate 100a shown in Figure 25 is the region of the fuel cell cathode separator plate 100a facing the first diffusion layer 500a, and corresponds to the second block section 30 (see Figure 24) in this embodiment.

[0211] In the region (a) of the fuel cell cathode separation plate 100a corresponding to the second block section 30 in this embodiment, a second flow field including turbulent stagnant flow fields TSF1 to TSF3 (see Figure 24) can be generated.

[0212] As described above, the H2O generated in the membrane electrode assembly 300a can be smoothly discharged into region (a) of the fuel cell cathode separator plate 100a by the turbulent, stagnant flow fields TSF1 to TSF3 generated in region (a).

[0213] However, the H2O discharged from the membrane electrode assembly 300a into region (a) of the fuel cell cathode separator plate 100a is not smoothly discharged in the direction of the gas outlet 12 due to the turbulent, stagnant flow fields TSF1 to TSF3 generated in region (a). As a result, the concentration of H2O in region (a) increases as the fuel cell cell 1000 operates.

[0214] In the (b) region of the fuel cell cathode separation plate 100a corresponding to the third block section 40 according to this embodiment, a third flow field including turbulent stagnant flow fields TSF1 to TSF3 (not shown) can be generated.

[0215] However, the explanation for the discharge of H2O from the membrane electrode assembly 300a to region (b) of the fuel cell cathode separator plate 100a shown in Figure 25, the discharge of H2O from region (b) of the fuel cell cathode separator plate 100a to the gas outlet 12, and the increase in H2O concentration are the same as the explanation for region (a) of the fuel cell cathode separator plate 100a, so a detailed explanation will be omitted below.

[0216] Referring to Figure 25, when the concentrations of H2O in regions (a) and (b) exceed a certain level, due to the difference in concentration, the H2O in region (a) moves to region (d) of the fuel cell anode separator plate 200a ((3)), and the H2O in region (b) moves to region (c) of the anode separator plate 200a ((4)).

[0217] In this way, the H2O that has moved to region (c) of the fuel cell anode separator plate 200a can move through the fuel cell anode separator plate 200a ((5)) by the hydrogen (Hydrogen(H2)) flowing into the fuel cell anode separator plate 200a.

[0218] The H2O that has moved to the fuel cell anode separation plate 200a in this manner can then be moved to the membrane electrode assembly 300a by electroosmosis generated by the operation of the fuel cell cell 1000 ((6)).

[0219] Furthermore, some of the H2O in region (a) of the fuel cell cathode separator plate 100a can be supplied to the membrane electrode assembly 300a without diffusing into region (c) ((7)).

[0220] Therefore, according to the fuel cell separation plate 100 of this embodiment, a three-dimensional H2O circulation path can be generated consisting of the process (1)→(2) in which H2O is discharged from the membrane electrode assembly 300a to the outside of the fuel cell cell 1000 (discharge of H2O from the fuel cell cathode separation plate 100a) and (4)→(5) (discharge of H2O from the fuel cell anode separation plate 200a), and the process (1)→((3) and (4))→(5)→(6) in which H2O generated in the fuel cell cell 1000 circulates inside the fuel cell cell 1000, and the process (a)→(7).

[0221] In short, the three-dimensional H2O circulation path of the fuel cell cell 1000 including the fuel cell separation plate 100 according to this embodiment allows the H2O generated in the membrane electrode assembly 300a to be smoothly discharged to the outside of the fuel cell cell 1000, thereby preventing the H2O flooding phenomenon. Furthermore, the three-dimensional H2O circulation path supplies a portion of the H2O discharged from the membrane electrode assembly 300a to the membrane electrode assembly 300a, thereby preventing the membrane electrode assembly 300a from drying out.

[0222] As described above, in a fuel cell cell 1000 to which the fuel cell separation plate 100 according to this embodiment is applied, moisture can be supplied to the membrane electrode assembly 300a by a three-dimensional H2O circulation path that penetrates the fuel cell cell 1000, even without the supply of an external humidifying medium.

[0223] According to the fuel cell cell 1000 including the fuel cell separation plate 100 of this embodiment, there is no need to install a humidifier for humidifying the fuel cell cell 1000 in the fuel cell system (not shown), thus reducing the overall volume and weight of the fuel cell system.

[0224] Figure 28 is a schematic diagram showing a fuel cell separation plate according to a second embodiment of the present invention.

[0225] Referring to Figure 28, the fuel cell separation plate 200 according to this embodiment may include a main body 210, a first block section 220, a second block section 230, a third block section 240, and a pair of fluid passages.

[0226] In the following, a detailed explanation of the main body 210, first block section 220, second block section 230, and third block section 240 according to the second embodiment of the present invention, which have the same configuration as the main body 10, first block section 20, second block section 30, and third block section 40 of the fuel cell separation plate 100 according to the first embodiment of the present invention shown in Figures 1 to 23, will be omitted.

[0227] Referring to Figure 28, the pair of fluid passages of the fuel cell separation plate 200 according to this embodiment are parallel to the first center line CL which is perpendicular to the first side 1 of the main body 210 and penetrates the center point of the main body 210, and can be installed spaced apart from each other with the first block section 220, the second block section 230, and the third block section 240 in between.

[0228] Figure 29 is a schematic diagram showing the pair of fluid passages in the fuel cell separator plate shown in Figure 28.

[0229] Referring to Figure 29, the pair of fluid passages according to this embodiment may include a first fluid passage 250 and a second fluid passage 260.

[0230] According to this embodiment, the first fluid passage 250 is installed between the first side 1 and the second side 2, facing one end 11b of the gas inlet 11, and can be fluidly connected to the first block section 220 and the third block section 240.

[0231] More specifically, the first fluid passage 250 may extend from the portion 220a where the first block portion 220 begins to the portion 240a where the third block portion 240 ends, along the side surface of the first block portion 220, and be installed facing one end 11b of the gas inlet 11.

[0232] Furthermore, according to this embodiment, the second fluid passage 260 It is installed between the first side 1 and the second side 2, facing one end 12b of the gas outlet 12, and can be fluidly connected to the first block section 220 and the second block section 230.

[0233] More specifically, the second fluid passage 260 may extend from the portion 230a where the second block portion 230 begins to the portion 220b where the first block portion 220 ends, along the side surface of the second block portion 230, and be installed facing one end 12b of the gas outlet 12.

[0234] In this embodiment, a 22nd linear flow field LF22 can be formed in the first fluid passage 250 by the fluid flowing in from the first gas inlet 11, and a 23rd linear flow field LF23 can be formed in the second fluid passage 260 by the fluid flowing in from the second block section 230.

[0235] The 22nd linear flow field LF22 formed in the first fluid passage 250 and the 23rd linear flow field LF23 formed in the second fluid passage 260 will be described in detail below.

[0236] However, in the following, the fluid flow in the first block section 220, second block section 230, and third block section 240 of the fuel cell separation plate 200 according to the second embodiment of the present invention is the same as that in the first block section 20, second block section 30, and third block section 40 of the fuel cell separation plate 100 shown in Figure 1 in Figure 23, so a detailed explanation of this will be omitted.

[0237] Furthermore, since the fluid and H2O flow paths in the fuel cell cell including the fuel cell separator plate 200 according to the second embodiment of the present invention and in the fuel cell cell including the fuel cell separator plate 100 shown in Figure 1 in Figure 25 are the same, a detailed explanation of this will be omitted below.

[0238] Figure 30 is a schematic diagram showing the combined flow field formed in the fuel cell separator plate including the pair of fluid passages in Figure 28, and Figure 31 is a schematic diagram showing the fluid and H2O flow paths in the fuel cell separator plate of Figure 28 in the fuel cell cell of Figure 25.

[0239] According to this embodiment, the 21st flow field 21 formed in the first block 220 may include a 21st linear diagonal flow field LF21, a 21st curved diagonal flow field CF21, and a 22nd curved diagonal flow field CF22.

[0240] Here, the formation mechanisms of the 21st linear diagonal flow field LF21, the 21st curved diagonal flow field CF21, and the 22nd curved diagonal flow field CF22 in this embodiment are the same as the formation mechanisms of the 1st linear diagonal flow field LF1, the 1st curved diagonal flow field CF1, and the 2nd curved diagonal flow field CF2 in Figure 24, so a detailed explanation of this will be omitted below.

[0241] The second flow field 22 formed in the second block section 230 according to this embodiment may include a plurality of first turbulent stagnant flow fields TSF 21, a plurality of second turbulent stagnant flow fields TSF 22, and a plurality of third turbulent stagnant flow fields TSF 23.

[0242] Here, the 23rd flow field 23 formed in the 3rd block 240 is formed by the same mechanism as the 22nd flow field 22 formed in the 2nd block 230, so a detailed explanation of this will be omitted below.

[0243] Referring again to Figure 28, the fluid velocity (flow rate) decreases as you move away from the gas inlet 11, and due to energy loss caused by turbulence and friction on the first side surface of the first block section 220, the fluid velocity (flow rate) of the 22nd curved diagonal flow field CF22 decreases as you move from the gas inlet 11 towards the gas outlet 12.

[0244] Furthermore, the more the 22nd curved diagonal flow field CF22 flows from the gas inlet 11 to the gas outlet 12, the less oxygen (O2) is carried by the 22nd curved diagonal flow field CF22.

[0245] Furthermore, as shown in Figure 31, as power generation progresses, excessive H2O may accumulate in region (b) of the third block 240, potentially causing H2O flooding.

[0246] According to this embodiment, the second 22 linear flow field LF22 formed in the first fluid passage 250 can prevent a decrease in the flow velocity (flow rate) of the second 22 curved diagonal flow field CF22, a decrease in the amount of oxygen (O2), and a flooding phenomenon of H2O in the third block portion 240.

[0247] Specifically, the first fluid passage 250 is linearly installed along the side surfaces of the first block portion 220 and the third block portion 240 between the first side 1 and the second side 2, and the second 22 linear flow field LF22 is formed by the fluid flowing into the first fluid passage 250 from the gas inlet 11.

[0248] Here, since the fluid flows along a linear flow path without frictional resistance in the second 22 linear flow field LF22, the flow velocity (flow rate) of the second 22 linear flow field LF22 is faster than the flow velocity (flow rate) of the second 22 curved diagonal flow field CF22 formed while passing through a plurality of block lines including a plurality of block members and mixing portions of the first block portion 220, and the flow rate thereby increases.

[0249] Therefore, as shown in FIG. 30, the fluid and the oxygen (O2) contained in the fluid are supplied from the second 22 linear flow field LF22 flowing in the direction from the first side 1 to the second side 2 to the second 22 curved diagonal flow field CF22, and by such supply of the fluid and oxygen (O2), a decrease in the flow velocity (flow rate) of the second 22 curved diagonal flow field CF22 can be prevented, and a decrease in the amount of oxygen (O2) can be prevented.

[0250] In addition, since a part of the H2O accumulated in the (b) region is discharged ((8)) to the gas outlet 12 by the fluid supplied from the second 22 linear flow field LF22 to the third block portion 240, a flooding phenomenon of H2O in the third block portion 240 can be prevented.

[0251] Referring again to FIG. 28, as the distance from the gas inlet 11 increases, the fluid flow velocity (flow rate) decreases, and due to the turbulent flow and energy loss due to friction generated on the second side surface of the first block portion 220, the flow velocity (flow rate) of the 21st curved diagonal flow field CF21 decreases as it goes from the gas inlet 11 in the direction of the gas outlet 12.

[0252] Also, in the membrane electrode assembly 300a in the portion through which the 21st curved diagonal flow field CF21 passes, the phenomenon that the membrane electrode assembly 300a dries may occur due to the dry air supplied through the inlet 11 and the heat generated by power generation.

[0253] Also, as shown in FIG. 31, as power generation progresses, H2O may be excessively accumulated in the (a) region of the second block portion 230, and a flooding phenomenon of H2O may occur.

[0254] According to this embodiment, formed in the second fluid passage 260 Linear flow field LF23 (No. 23) can prevent the decrease in the flow velocity (flow rate) of the 21st curved diagonal flow field CF21, the phenomenon that the membrane electrode assembly 300a dries, and the flooding phenomenon of H2O in the second block portion 230.

[0255] Specifically, the second fluid passage 260 is linearly installed along the side surfaces of the first block portion 220 and the second block portion 230 between the first side 1 and the second side 2, and the 23rd linear flow field LF23 is formed by the fluid flowing into the second fluid passage 260 from the second block portion 230.

[0256] Here, in the 23rd linear flow field LF23, the fluid flows along a straight channel with no frictional resistance. Therefore, the flow velocity (flow rate) in the 23rd linear flow field LF23 is faster than the flow velocity (flow rate) in the 21st curved diagonal flow field CF21, which is formed as the fluid passes through multiple block lines including multiple block members and mixing sections of the 1st block section 220. As a result, the flow rate also increases.

[0257] Therefore, as shown in Figure 30, fluid is supplied from the 23rd linear flow field LF23, which flows in the direction from the first side 1 to the second side 2, to the 21st curved diagonal flow field CF21, and this fluid supply can prevent a decrease in the flow velocity (flow rate) of the 21st curved diagonal flow field CF21.

[0258] Furthermore, as shown in Figure 31, a portion of the H2O accumulated in the second block section 230 is discharged from the second block section 230 by the 23rd linear flow field LF23 and supplied to the membrane electrode assembly 300a in the portion through which the 21st curved diagonal flow field CF21 passes, thereby preventing the membrane electrode assembly 300a from drying out.

[0259] Furthermore, as shown in Figure 31, a portion of the H2O accumulated in the second block section 230 is discharged from the second block section 230 to the gas outlet 12 by the 23rd linear flow field LF23 ((9)), thereby preventing the flooding phenomenon of H2O in the second block section 230.

[0260] Figure 32 is a graph comparing the behavior of the cell voltage (V) over time between a novel fuel cell cell to which a fuel cell separator according to the second embodiment of the present invention is applied and a conventional fuel cell cell to which a conventional fuel cell separator is applied. Figure 33 is an enlarged graph of the S1 portion of Figure 32.

[0261] The behavior of the cell voltage (V) over time (seconds) of a novel fuel cell to which the fuel cell separation plate according to the second embodiment of the present invention described later is applied, and a conventional fuel cell to which a conventional fuel cell separation plate is applied, was measured in an unhumidified state in which no humidifier was used in the novel fuel cell and the conventional fuel cell.

[0262] Furthermore, conventional fuel cell separators were used in which multiple linear channels were formed between the inlet and outlet, fluidically connecting the inlet and outlet.

[0263] Furthermore, it was analyzed that the voltage behavior of a fuel cell cell to which the fuel cell separation plate according to the second embodiment of the present invention is applied is substantially similar to that of a fuel cell cell to which the fuel cell separation plate according to the first embodiment of the present invention is applied. Therefore, a detailed explanation of the voltage behavior of a fuel cell cell to which the fuel cell separation plate according to the first embodiment of the present invention is applied will be omitted below.

[0264] Referring to Figure 32, the cell voltage (NTV) of a novel fuel cell cell to which the fuel cell separation plate according to the second embodiment of the present invention is applied was analyzed to be approximately 0.725V at the time of cell operation, and to stabilize to a voltage between approximately 0.718V and 0.719V approximately 60 seconds after the start of operation (P1).

[0265] Subsequently, the voltage measurement results of the novel fuel cell cell according to the second embodiment of the present invention were analyzed to show stable voltage behavior between approximately 0.718V and 0.719V for approximately 10 minutes or more (approximately 3900 seconds).

[0266] However, referring to Figures 32 and 33, it was analyzed that the cell voltage (PTV) of a conventional fuel cell cell to which a conventional fuel cell separator is applied rapidly decreases to 0.7V or less (P2) after the start of operation, reaches approximately 60 seconds after the start of operation, decreases to approximately 0.69V or less, and then the cell operation is stopped.

[0267] As described above, according to the conventional fuel cell separator applied to the conventional fuel cell, it can be seen that the operation of the fuel cell becomes impossible due to a rapid decrease in the voltage V of the fuel cell in a non-humidified state where no humidifying device is applied.

[0268] However, according to the fuel cell separator according to the second embodiment of the present invention applied to the novel fuel cell, it can be seen that the fuel cell can be stably operated because the cell voltage of the fuel cell is stably maintained even in a non-humidified state where no humidifying device is applied.

[0269] In the conventional fuel cell system, since the volume and weight increase due to the humidifying device and the auxiliary devices for its operation, the devices and technical fields to which the fuel cell system can be applied are limited.

[0270] Therefore, according to the fuel cell system (not shown) including the fuel cell separators 100 and 200 according to the present embodiment, since no humidifying device and the auxiliary devices for its operation are required, the volume and weight of the fuel cell system can be significantly reduced, so that the devices and technical fields to which the fuel cell system can be applied can be expanded.

[0271] Also, according to the fuel cell system including the fuel cell separators 100 and 200 according to the present embodiment, since the humidifying device and the auxiliary devices for its operation are removed, the price of the fuel cell system can be lowered, so that the price competitiveness in the related technical fields can be enhanced.

[0272] As described above, the embodiments of the present invention have been described. Those having ordinary knowledge in the technical field to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea and essential features. Therefore, it should be understood that the embodiments described above are exemplary in all aspects and not restrictive.

Claims

1. A main body (10) including a gas inlet (11) formed along the first side (1), and a gas outlet (12) located diagonally opposite the gas inlet (11) and formed along the second side (2) opposite the first side, The first block section (20) is installed in the diagonal direction and fluidly connects the gas inlet and the gas outlet, A second block section (30) is installed adjacent to the first corner region (A1) of the first side, located on the opposite side of the gas inlet, so as to be fluidly connected to the first block section, A fuel cell separator plate, comprising a third block portion (40) installed adjacent to the second corner region (A2) of the second side located on the opposite side of the gas outlet, so as to be fluidly connected to the first block portion.

2. The first block section is, The fuel cell separation plate according to claim 1, comprising a plurality of first block lines (21) arranged at 11th intervals (G11) that form a first angle (α1) with a first center line (CL) perpendicular to the first side of the main body and passing through the center point of the main body, and a plurality of first flow channels (22) formed between the plurality of first block lines.

3. Each of the plurality of first block lines (21) is, The fuel cell separation plate according to claim 2, comprising a plurality of first block members (211) arranged at 12 intervals (G12), and a plurality of first mixing sections (212) formed by the 12 intervals (G12) and fluidly connecting the plurality of first flow channels (22).

4. The aforementioned plurality of first block lines (21) are, The fuel cell separation plate according to claim 2, comprising a first boundary block line (21a) facing the end (11a) of the gas inlet and forming a boundary with the second block portion (30), and a second boundary block line (21b) facing the end (12a) of the gas outlet and forming a boundary with the third block portion (40).

5. The first boundary block line (21a) is It includes a plurality of first a block members (211a) arranged at an 11a interval (G11a), and a plurality of first a mixing sections (212a) formed by the 11a interval (G11a) and fluidly connected to the plurality of first flow channels (22), The second boundary block line (21b) is The fuel cell separation plate according to claim 4, comprising a plurality of first b block members (211b) arranged at 11b intervals (G11b), and a plurality of first b mixing sections (212b) formed by the 11b intervals (G11b) and fluidly connected to the plurality of first flow channels (22).

6. The fuel cell separation plate according to claim 4, wherein the first boundary block line (21a) forms a second angle (α2) with the first center line (CL), and the second boundary block line (21b) forms a third angle (α3) with the first center line (CL).

7. In the total area of ​​the block section, which is the sum of the areas of the first block section (20), the second block section (30), and the third block section (40), the ratio (%) of the area of ​​each of the first block section (20), the second block section (20), and the third block section (40) is: The fuel cell separator plate according to claim 6, which is modified by changing one or more of the second angle (α2), the third angle (α3), the inlet length of the gas inlet (L1), and the outlet length of the gas outlet (L2).

8. The second block portion (30) is The fuel cell separation plate according to claim 1, comprising a plurality of second block lines (31) arranged at a second interval (G22) with a first center line (CL) perpendicular to the first side of the main body and passing through the center point of the main body, forming a fourth angle (α4) with the first center line (CL) and a plurality of second flow channels (32) formed between the plurality of second block lines (31).

9. The fuel cell separator plate according to claim 8, wherein each of the plurality of second block lines (31) includes a plurality of second block members (311) arranged at 21 intervals (G21), and a plurality of second mixing sections (312) formed by the 21 intervals (G21) and fluidly connecting the plurality of second flow paths (32).

10. The third block portion (40) is, The fuel cell separation plate according to claim 1, comprising a plurality of third block lines (41) arranged at a third interval (G31) with a first center line (CL) perpendicular to the first side of the main body and passing through the center point of the main body, forming a fifth angle (α5) with the first center line (CL) and a plurality of third flow channels (42) formed between the plurality of third block lines.

11. Each of the plurality of third block lines (41) includes a plurality of third block members (411) arranged at a 31st interval (G31), and a plurality of third mixing sections (412) formed by the 31st interval (G31) and which fluidly connect the plurality of third flow paths (42), as described in claim 10.

12. The fuel cell separation plate according to claim 1, further comprising a pair of fluid passages (250, 260) which are parallel to a first center line (CL) perpendicular to the first side of the main body and passing through the center point of the main body, and which are spaced apart from each other, sandwiching the first block portion (20), the second block portion (30), and the third block portion (40).

13. The pair of fluid passages (250, 260) are A first fluid passage (250) is installed between the first side (1) and the second side (2) facing one end (11b) of the gas inlet (11), and is fluidly connected to the first block section (20) and the third block section (40), and The fuel cell separator plate according to claim 12, comprising a second fluid passage (250) installed between the first side (1) and the second side (2) facing one end (12b) of the gas outlet (12), and fluidly connected to the first block portion (20) and the second block portion (30).

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