Fuel cell separator

Abstract

The present invention relates to a fuel cell separator. Specifically, a fuel cell separator according to the present embodiment may comprise: a main body including a gas inlet formed along a first side and a gas outlet positioned in a diagonal direction of the gas inlet and formed along a second side facing the first side; a first block part installed on the main body in a diagonal direction and fluidically connecting the gas inlet and the gas outlet; a second block part positioned on the side opposite to the gas inlet to be fluidically connected to the first block part and installed adjacent to a first corner area of the first side; and a third block part positioned on the side opposite to the gas outlet to be fluidically connected to the first block part and installed adjacent to a second corner area of the second side.

Description

fuel cell separator

[0001] The present invention relates to a fuel cell separator, and more particularly, to a fuel cell separator comprising a main body including a gas inlet and a gas outlet, a first block part installed in the main body, a second block part fluidly connected to the first block part, and a third block part fluidly connected to the first block part, and for preventing a flooding phenomenon and a drying phenomenon of a membrane electrode assembly and controlling the fluidity of a flow field according to the structure and area ratio of the first block part, the second block part, and the third block part.

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

[0003] Among these fuel cells, the 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 pass hydrogen ions, a gas diffusion layer (GDL) that evenly distributes reaction gases, and a bipolar plate that supplies reaction gases to the gas diffusion layer and discharges generated water.

[0004] As the flow path structures of the conventionally known fuel cell separator for the diffusion of reaction gases and discharge of water, there are known two-dimensional flow path structures such as a meandering flow path in which winding flow paths are continuously formed, a parallel flow path in which a plurality of straight flow path groups are arranged in parallel, a parallel and series mixed flow path in which parallel flow paths are connected to each other, and a protruding flow path in which a plurality of dot-shaped protrusions are arranged, and a three-dimensional flow path structure composed of a mesh-like structure.

[0005] However, the fuel cell separator formed with a meandering flow path, a parallel flow path, and a parallel and series mixed flow path had a problem in that, because the gas flows laminarly in the flow path, moisture generated in the membrane electrode assembly (MEA) is not properly removed by the fuel cell separator, and the gas pressure decreases toward the gas outlet, which increases the possibility of MEA flooding occurring when the flow path is blocked by moisture.

[0006] In addition, a fuel cell separator having a protruding filament structure or a filament structure mixed with a protruding filament structure and another filament structure applied had a problem in that moisture generated in the membrane electrode assembly (MEA) was excessively discharged, causing the membrane electrode assembly (MEA) to dry out.

[0007] In addition, the fuel cell separator with a three-dimensional structure had the problem that moisture was not removed from the complex three-dimensional structure of the flow path, processing and assembly were difficult, and production costs increased.

[0008] Moreover, conventional fuel cell systems require 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, and the increase in volume and weight of the fuel cell system limits the devices or fields in which the fuel cell system can be utilized.

[0009] [Prior Art Literature]

[0010] [Patent Document]

[0011] (Patent Document 1): KR 2017-0050689 (published on May 11, 2017)

[0012] (Patent Document 2): KR 2010-0112354 (published on October 19, 2010)

[0013] The present invention has been devised to solve the above problems, and the present invention provides a fuel cell separator having a flow path structure that can prevent flooding and drying of a membrane electrode assembly (MEA).

[0014] In addition, the present invention provides a fuel cell separator having a flow path structure capable of forming a three-dimensional H2O circulation path in which moisture generated in a membrane electrode assembly (MEA) in a fuel cell is reused for self-humidification of the membrane electrode assembly (MEA).

[0015] In addition, the present invention provides a fuel cell separator having a flow path structure that can reduce the overall volume and weight of a fuel cell system by removing a humidifier from the fuel cell system.

[0016] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0017] A fuel cell separator according to one embodiment of the present invention may include a body including a gas inlet formed along a first side and a gas outlet formed along a second side (2) located diagonally from the gas inlet and facing the first side, a first block portion installed diagonally from the body to fluidly connect the gas inlet and the gas outlet, a second block portion installed opposite the gas inlet to be fluidly connected to the first block portion and adjacent to a first corner region of the first side, and a third block portion installed opposite the gas outlet to be fluidly connected to the first block portion and adjacent to a second corner region of the second side.

[0018] Additionally, the first block portion may include a plurality of first block lines arranged at a first interval and forming a first angle with a first center line that passes through the center point of the main body and is perpendicular to the first side of the main body, and a plurality of first flow paths formed between the plurality of first block lines.

[0019] Additionally, each of the plurality of first block lines may include a plurality of first block members arranged at an eleventh interval and a plurality of first mixing sections formed by the eleventh interval and fluidly connecting the plurality of first flow paths.

[0020] Additionally, the plurality of first block lines may include a first boundary block line facing the end of the gas inlet and forming a boundary with the second block portion, and a second boundary block line facing the end of the gas outlet and forming a boundary with the third block portion.

[0021] Additionally, the area ratio of the first block portion, the second block portion, and the third block portion to the total area of ​​the main body may vary by changing at least one of the inlet length of the gas inlet, the outlet length of the gas outlet, and the first angle.

[0022] Additionally, the second block portion may include a plurality of second block lines arranged at a second interval and forming a second angle with a first center line passing through the center point of the main body perpendicular to the first side of the main body, and a plurality of second flow paths formed between the plurality of second block lines.

[0023] Additionally, each of the plurality of second block lines may include a plurality of second block members arranged at 21 intervals and a plurality of second mixing sections formed by the 21 intervals and fluidly connecting the plurality of second flow paths.

[0024] Additionally, the third block section may include a plurality of third block lines arranged at a third interval and forming a third angle with a first center line that passes through the center point of the main body and is perpendicular to the first side of the main body, and a plurality of third flow paths formed between the plurality of third block lines.

[0025] Additionally, each of the plurality of 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 the plurality of third flow paths.

[0026] A fuel cell separator further comprising a pair of fluid passages that are installed spaced apart from each other with a first block portion, a second block portion, and a third block portion interposed therebetween, and a first center line that passes through the center point of the main body and is perpendicular to the first side of the main body.

[0027] Additionally, a pair of fluid passages may include a first fluid passage facing one end of the gas inlet and installed between the first side and the second side and fluidly connected to the first block portion and the third block portion, and a second fluid passage facing one end of the gas outlet and installed between the first side and the second side and fluidly connected to the first block portion and the second block portion.

[0028] According to a fuel cell separator according to one embodiment of the present invention, a plurality of first flow paths that are adjacent to each other and in which laminar flow flows are fluidly connected by a plurality of first mixing sections in which turbulence is generated, thereby improving gas diffusion into a membrane electrode assembly (MEA) and allowing moisture to be discharged smoothly by a diagonal flow field formed, thereby preventing H2O flooding in the membrane electrode assembly (MEA) and the first flow path.

[0029] In addition, according to the fuel cell separator according to one embodiment of the present invention, by 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 separator, and the first turbulent stagnant flow field to the third turbulent stagnant flow field formed in the second block portion and the third block portion, the H2O generated in the membrane electrode assembly can be smoothly discharged to the outside of the fuel cell cell, thereby preventing the H2O flooding phenomenon, and a portion of the H2O discharged from the membrane electrode assembly through the three-dimensional H2O circulation path can be supplied to the membrane electrode assembly, thereby preventing the membrane electrode assembly from drying out.

[0030] In addition, according to the fuel cell separator according to one embodiment of the present invention, by adjusting the area ratio (%) occupied by the areas of the first block portion, the second block portion, and the third block portion in the total block portion area of ​​the fuel cell separator, the gas movement speed per unit time and the energy supply per unit time according to the gas movement speed per unit time can be increased so as to be suitable for a mobility device, or the gas supply area and the gas diffusion area can be increased so as to produce high energy per unit area so as to be suitable for a storage device.

[0031] FIG. 1 is a schematic drawing of a fuel cell separator according to a first embodiment of the present invention.

[0032] Figure 2 is a schematic drawing of the first block portion of Figure 1.

[0033] Figure 3 is a drawing schematically illustrating the first block line of the first block section of Figure 2.

[0034] Fig. 4 is a drawing schematically illustrating a first modified example of the first block line of the first block portion of Fig. 3.

[0035] Fig. 5 is a schematic drawing illustrating a second modified example of the first block line of the first block section of Fig. 3.

[0036] Fig. 6 is a schematic drawing illustrating a third modified example of the first block line of the first block section of Fig. 3.

[0037] FIG. 7 is a schematic drawing of the first and second boundary block lines of the fuel cell separator of FIG. 2.

[0038] Figure 8 is a drawing schematically illustrating the first boundary block line of Figure 7.

[0039] Figure 9 is a drawing schematically illustrating a first modified example of the first boundary block line of Figure 8.

[0040] Figure 10 is a schematic drawing illustrating a second variation of the first boundary block line of Figure 8.

[0041] Fig. 11 is a drawing schematically illustrating a third variation of the first boundary block line of Fig. 8.

[0042] FIG. 12 is a drawing schematically illustrating changes in the angle formed by the first center line (CL) and the first and second boundary block lines according to the lengths of the first and second boundary block lines and the gas inlet and gas outlet of FIG. 2.

[0043] Figures 13 to 16 are drawings schematically illustrating changes in the areas of the first block portion, the second block portion, and the third block portion according to changes in the angle formed by the first center line (CL) of Figure 12 and the first and second boundary block lines.

[0044] Figure 17 is a schematic drawing of the second block section and the third block section of Figure 1.

[0045] Fig. 18 is a drawing schematically illustrating the second block line of the second block section of Fig. 17.

[0046] Fig. 19 is a drawing schematically illustrating a first modified example of the second block line of the second block section of Fig. 18.

[0047] Fig. 20 is a schematic drawing illustrating a second variation of the second block line of the second block section of Fig. 18.

[0048] Fig. 21 is a schematic drawing illustrating a third modified example of the second block line of the second block section of Fig. 18.

[0049] Fig. 22 is a drawing schematically illustrating a plurality of other variations of the second block line of the second block section of Fig. 18.

[0050] Figure 23 is a schematic diagram illustrating the flow of fluid in the first block portion and the second block portion of the fuel cell separator of Figure 1.

[0051] Fig. 24 is a schematic diagram illustrating a composite flow field formed in the fuel cell separator of Fig. 1 by the flow of the fluid of Fig. 23.

[0052] FIG. 25 is a schematic diagram illustrating the flow path of fluid and H2O in a fuel cell cell including the fuel cell separator of FIG. 1.

[0053] FIG. 26 is a schematic diagram illustrating the flow path of fluid and H2O in the fuel cell separator of FIG. 1 in the fuel cell of FIG. 25.

[0054] Figure 27 is a schematic diagram illustrating the flow path of fluid and H2O in the fuel cell separator into which hydrogen is introduced in the fuel cell of Figure 25.

[0055] Figure 28 is a schematic drawing of a fuel cell separator according to a second embodiment of the present invention.

[0056] FIG. 29 is a schematic drawing of a pair of fluid passages of the fuel cell separator of FIG. 28.

[0057] FIG. 30 is a schematic diagram illustrating a composite flow field formed in a fuel cell separator including a pair of fluid passages of FIG. 28.

[0058] FIG. 31 is a schematic diagram illustrating the flow path of fluid and H2O in the fuel cell separator of FIG. 28 in the fuel cell cell of FIG. 25.

[0059] Figure 32 is a graph image comparing the voltage behavior over time of 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 separator to which a conventional fuel cell separator is applied.

[0060] Figure 33 is an enlarged graph image of the S1 portion of Figure 32.

[0061] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described below in detail, along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms.

[0062] Hereinafter, the technical features of the present invention will be described in detail with reference to the attached drawings.

[0063] FIG. 1 is a schematic drawing of a fuel cell separator according to a first embodiment of the present invention.

[0064] Referring to FIG. 1, a fuel cell separator (100) according to the first embodiment of the present invention may include a main body (10), a first block portion (20), a second block portion (30), and a third block portion (40).

[0065] The main body (10) of the fuel cell separator (100) according to the present embodiment may be rectangular and composed of a first side (1), a second side (2) facing the first side (1), a third side (3) connecting the first side (1) and the second side and facing each other, and a fourth side (4).

[0066] However, the main body (10) according to the present embodiment is not limited to a rectangle, and may be one of polygons including short sides or long sides facing each other.

[0067] The main body (10) of the fuel cell separator (100) may include a gas inlet (11) and a gas outlet (12), and a sealing member (400) may be coupled to the main body (10).

[0068] Here, the gas inlet (11) can be formed along the first side (1) of the main body (10), and the gas outlet (12) can be formed along the second side (2) of the main body (10) in a diagonal direction of the gas inlet (11).

[0069] Additionally, the sealing member (400) can be joined along the edge of the main body (10) to surround the first block portion (20), the second block portion (30), and the third block portion (40).

[0070] Accordingly, according to the sealing member (400) according to the present embodiment, gas flowing into the first inlet (11) of the main body (10) can be prevented from leaking out, and gas moving in a diagonal direction between the inlet (11) and the first outlet (12) can be prevented from moving out of the first block part (20), the second block part (30), and the third block part (40), thereby forming a flow field by the gas flowing into the first block part (20), the second block part (30), and the third block part (40).

[0071] However, the configuration for preventing gas movement to the outside of the first block portion (20), the second block portion (30), and the third block portion (40) is not limited to the sealing member (400), and may include various configurations such as a gas blocking projection and a gas blocking member that are installed around the first block portion (20), the second block portion (30), and the third block portion (40) to prevent gas movement.

[0072] The first block section (20) according to the present embodiment is installed diagonally between the gas inlet (11) and the gas outlet (12) in the main body (10) so as to fluidly connect the gas inlet (11) and the gas outlet (12).

[0073] In addition, the second block portion (30) according to the present embodiment may be positioned opposite the gas inlet (11) so as to be fluidly connected to the first block portion (20) and installed adjacent to the first corner area (A1) of the first side.

[0074] In addition, the third block portion (40) according to the present embodiment may be positioned opposite the gas outlet (11) so as to be fluidly connected to the first block portion (20) and may be installed adjacent to the second corner area (A2) of the second side.

[0075] Here, according to the present embodiment, the second block portion (30) and the third block portion (40) can be installed diagonally between the first side (1) and the second side (2).

[0076] Accordingly, according to the fuel cell separator (100) according to the present embodiment, a composite flow field can be formed, including a diagonal flow field formed in the first block portion (20) installed diagonally between the gas inlet (11) and the gas outlet (12), and a stagnant flow field formed in the second block portion (30) and the third block portion (40) that is fluidly connected to the diagonal flow field formed in the first block portion (20).

[0077] The diagonal flow field formed in the first block section (20) and the stagnant flow field formed in the second block section (30) and the third block section (40) are described in detail in the description of FIGS. 22 and 23.

[0078] Fig. 2 is a schematic drawing of the first block portion of Fig. 1, and Fig. 3 is a schematic drawing of the first block line of the first block portion of Fig. 2. In addition, Figs. 4 to 6 are schematic drawings of first to third modified examples of the first block line of the first block portion of Fig. 3.

[0079] Referring to FIG. 2, the first block portion (20) according to the present embodiment may include a plurality of first block lines (21) arranged at an 11th interval (G11) and a plurality of first flow paths (22) formed between the plurality of first block lines (21).

[0080] Each of the plurality of first block lines (21) can form a first angle (α1) with the first center line (CL) that passes through the center point perpendicular to the first side (1) of the main body.

[0081] The first angle (α1) may be an acute angle greater than 0 degrees and less than 90 degrees, which is the diagonal inclination of the first block line (21) installed between the gas inlet (11) and the gas outlet (12) arranged diagonally.

[0082] Here, the angles formed by the first center line (CL) and each of the plurality of block lines (21) may be the same or different angles.

[0083] In detail, as shown in Fig. 2, if the angles formed by the first center line (CL) and some of the plurality of block lines (21) are α1a and α1b, α1a and α1b may be the same or different angles.

[0084] Accordingly, by adjusting the angle formed between the first center line (CL) and each of the plurality of block lines (21), the width of the flow path (22) formed between the plurality of block lines (21) and the width of the flow path accordingly can be adjusted.

[0085] Accordingly, according to the present embodiment, the flow rate and volume of the fluid passing through the first block section (20) can be controlled according to the width of the flow path (22) and the width of the flow path accordingly by adjusting the first angle (α1) formed by the first center line (CL) and each of the plurality of block lines (21) to be the same or different from each other.

[0086] Here, the range of the angle value of the first angle (α1) formed by each of the plurality of first block lines (21) and the first center line (CL) is described in more detail in the description of FIG. 12 below.

[0087] In addition, each of the plurality of first block lines (21) according to the present embodiment may include a plurality of first block members (211) arranged at a 12th interval (G12) and a plurality of first mixing parts (212) formed by the 12th interval (G12) and fluidly connecting a plurality of first flow paths (22).

[0088] As illustrated in FIG. 2, each of the plurality of first block lines (21) may be formed by aligning each of the plurality of first block members (211) diagonally between the gas inlet (11) and the gas outlet (12) while forming an angle with the first center line (CL).

[0089] In addition, a plurality of first flow paths (22) formed between a plurality of first block lines (21) are fluidly connected in a plurality of first mixing sections (212) formed by a 12th gap (G12) between a plurality of first block members (211), and a turbulent flow that fluidly connects a plurality of first flow paths (22) can occur in the mixing section (212).

[0090] Therefore, according to the present embodiment, a plurality of first flow paths (22) that are adjacent to each other and in which laminar flow flows are fluidly connected by a plurality of first mixing sections (212) in which turbulence is generated, thereby improving gas diffusion into the membrane electrode assembly (MEA) and allowing moisture to be discharged smoothly by the diagonal flow field formed, so that the H2O flooding phenomenon in the membrane electrode assembly (MEA) and the first flow path (22) can be prevented.

[0091] Referring to FIGS. 3 to 6, the first block member (211) forming the first block line (21) according to the present embodiment may include one or more of a straight rib-shaped block, a columnar block, and a wave-shaped rib-shaped block.

[0092] In the following, detailed descriptions of common parts with those described with reference to Fig. 2 are omitted, and only necessary parts are briefly described.

[0093] FIG. 3 is a schematic drawing illustrating an embodiment of the first block line of the first block section of FIG. 2.

[0094] Referring to FIG. 3, each of the plurality of 1t1 block lines (21t1) may include a plurality of 1t1 straight rib-shaped block members (211t1) and a plurality of 12t1 mixing members (212t1) formed between the plurality of 1t1 straight rib-shaped block members (211t1) arranged at a 12t1 interval (G12t1).

[0095] In addition, a plurality of first t1 block lines (21t1) may be arranged at an 11t1 interval (G11t1) to form a plurality of first t1 flow paths (22t1), and some of the plurality of 12t1 mixing parts (212t1) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0096] FIG. 4 is a schematic drawing illustrating a first modified example of the first t1 block line of the first block section of FIG. 3.

[0097] Referring to FIG. 4, each of the plurality of 1t2 block lines (21t2) may include a 1t rib block member (211t2) including a plurality of 1t21 straight rib block members (211t21) and a plurality of 1t22 columnar block members (211t22) arranged between the plurality of 1t21 straight rib block members (211t21), and a plurality of 12t2 mixing members (212t2) formed between the plurality of 1t21 straight rib block members (211t21) and the plurality of 1t22 columnar block members (211t22) arranged at a 12t2 interval (G12t2).

[0098] In addition, a plurality of first t2 block lines (21t2) may be arranged at an 11t2 interval (G12t2) to form a plurality of first t2 flow paths (22t2), and some of the plurality of 12t2 mixing parts (212t2) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0099] FIG. 5 is a schematic drawing illustrating a second modified example of the first t1 block line of the first block section of FIG. 3.

[0100] Referring to FIG. 5, each of the plurality of 1t3 block lines (21t3) may include a plurality of 12t3 mixing portions (212t3) formed between a plurality of 1t3 wave-shaped rib-shaped block members (211t3) and a plurality of 1t3 wave-shaped rib-shaped block members (211t3) arranged at a 12t3 interval (G12t3).

[0101] In addition, a plurality of 1t3 block lines (21t3) may be arranged at 11t3 intervals (G11t3) to form a plurality of 1t3 flow paths (22t3), and some of a plurality of 12t3 mixing parts (212t3) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0102] FIG. 6 is a schematic drawing illustrating a third modified example of the first t1 block line (21t1) of the first block section of FIG. 3.

[0103] Referring to FIG. 6, each of the plurality of first t4 block lines (21t4) may include a plurality of first t4 mixed rib block members (211t4) including a plurality of first t41 wave rib block members (211t41) and a plurality of first t42 columnar block members (211t42) arranged between the plurality of first t41 wave rib block members (211t41), and a plurality of first t4 mixed members (212t4) formed between the plurality of first t4 wave rib block members (211t4) and the plurality of first t42 columnar block members (211t42) arranged at a 12t4 interval (G12t4).

[0104] In addition, a plurality of first t4 block lines (21t4) may be arranged at an 11t4 interval (G12t4) to form a plurality of first t4 flow paths (22t4), and some of the plurality of 12t4 mixing parts (212t4) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0105] However, the first block line (21) and the first block member (211) forming the same according to the present embodiment are not limited to the shape or arrangement described in FIGS. 3 to 6 and the related descriptions, and may be modified into block members having different shapes and block lines in which these block members are arranged in various orders.

[0106] Fig. 7 is a schematic drawing of the first and second boundary block lines of the fuel cell separator of Fig. 2, and Fig. 8 is a schematic drawing of the first boundary block line of Fig. 7. Figs. 9 to 11 are schematic drawings of first to third modified examples of the first boundary block line of Fig. 8.

[0107] Referring to FIG. 7, the plurality of first block lines (21) according to the present 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).

[0108] Here, the first boundary block line (21a) may include a plurality of first a block members (211a) arranged at an 11a interval (G11a) and a plurality of first a mixing parts (212a) formed by the 11a interval (G11a) and fluidly connected to a plurality of first flow paths (22).

[0109] Referring to FIGS. 8 to 11, the first block member (211a) forming the first boundary block line (21a) according to the present embodiment may include at least one of a straight rib block, a columnar block, and a wave-shaped rib block.

[0110] Referring to FIG. 8, the 1a1 boundary block line (21a1) may include a plurality of 1a1 straight rib-shaped block members (211a1) and a plurality of 1a1 mixing portions (212a1) formed between the plurality of 1a1 straight rib-shaped block members (211a1) arranged at an 11a1 interval (G11a1).

[0111] Referring to FIG. 9, the 1a2 boundary block line (21a2) may include a 1a2 rib-shaped block member (211a2) including a plurality of 1a21 straight rib-shaped block members (211a21) and a plurality of 1a22 column-shaped block members (211a22) arranged between the plurality of 1a21 straight rib-shaped block members (211a21), and a plurality of 12a2 mixed portions (212a2) formed between the plurality of 1a21 straight rib-shaped block members (211a1) and the plurality of 1a22 column-shaped block members (211a22) arranged at a 12t2 interval (G12a2).

[0112] Referring to FIG. 10, the 1a3 boundary block line (21a3) may include a plurality of 1a3 wave-shaped rib-shaped block members (211a3) and a plurality of 1a3 mixing portions (212a3) formed between the plurality of 1a3 wave-shaped rib-shaped block members (211a3) arranged at an 11a3 interval (G11a3).

[0113] Referring to FIG. 11, the 1a4 boundary block line (21a4) may include a 1a4 rib-shaped block member (211t2) including a plurality of 1a41 wave-shaped rib-shaped block members (211a41) and a plurality of 1a42 column-shaped block members (211a42) arranged between the plurality of 1a41 wave-shaped rib-shaped block members (211a41), and a plurality of 1a4 mixing portions (212a4) formed between the plurality of 1a41 wave-shaped rib-shaped block members (211a41) and the plurality of 1a42 column-shaped block members (211a42) arranged at an 11a4 interval (G12a4).

[0114] However, the first boundary block line (21a) according to the present embodiment and the first a block member (211a) forming the same are not limited to the shapes or arrangements described in FIGS. 8 to 11 and the related descriptions, and may be modified into block members having different shapes and block lines in which such block members are arranged in various orders.

[0115] In addition, the second boundary block line (21b) according to the present embodiment may include a plurality of first b block members (211b) arranged at an 11b interval (G11b) and a plurality of first b mixing parts (212b) formed by the 11b interval (G11b) and fluidly connected to a plurality of first flow paths (22).

[0116] Here, the arrangement and shape (not shown) of the first boundary block line (21b) and the first b block member (211b) according to the present embodiment may be the same as the arrangement and shape of the second boundary block line (21a) and the first a block member (211a) described above, and therefore, a detailed description thereof is omitted.

[0117] FIG. 12 is a drawing schematically illustrating changes in the angle formed by the first center line (CL) and the first and second boundary block lines according to the lengths of the first and second boundary block lines and the gas inlet and gas outlet of FIG. 2.

[0118] Referring to FIG. 12, the first block section (20), the second block section (30), and the third block section (40) according to the present embodiment can form a power generation area (EGA) where electricity is produced.

[0119] In addition, the power generation area (EGA) according to the present 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) connecting the 11th side (EGA11) and the 12th side (EGA12) and located on opposite sides.

[0120] In addition, the development area (EGA) may include a first point (W1) spaced apart by a W1 interval (WG1) from the point where the 11th side (EGA11) and the 13th side (EGA13) meet, a second point (W2) spaced apart by a W2 interval (WG2) from the point where the 12th side (EGA12) and the 13th side (EGA13) meet, a third point (W3) spaced apart by a W2 interval (WG2) from the point where the 12th side (EGA12) and the 14th side (EGA14) meet, and a fourth point (W4) spaced apart by a W2 interval (WG2) from the point where the 11th side (EGA11) and the 14th side (EGA14) meet.

[0121] Below, the diagonal slope of the first boundary block line (21a) based on the first center line (CL) according to the present embodiment will be described in detail.

[0122] The first boundary block line (21a) according to the present embodiment may include an 11th stage (21aE1) facing the end (11a) of the gas inlet (11) and a 12th stage (21aE2) located on the opposite side of the 11th stage (21aE1).

[0123] As illustrated in FIG. 12, the angle formed by the first boundary block line (21a) and the first center line (CL) may have a variable value depending on the position at the 11th side (EGA11) of the 11th section (21aE1) of the first boundary block line (21a) and the position at the 12th side (EGA12) of the 12th section (21aE2).

[0124] In detail, the position of the 13th side (EGA13) of the 11th section (21aE1) of the first boundary block line (21a) can be located between the first point (W1) and the second point (W2), and the first point (W1) can be located at a point of the 13th side (EGA13) that is spaced apart from the 11th side (EGA11) by 0.05 EL1 (cm) when the length of the 13th side (EGA13) is EL1 (cm).

[0125] In addition, the position of the 11th side (EGA11) of the 11th section (21aE1) of the first boundary block line (21a) may be located between the end (11a) of the gas inlet (11) and the fourth point (W4) depending on the change in the position of the end (11a) of the gas inlet according to the change in the length of the gas inlet (11).

[0126] Referring to FIG. 12, the maximum angle formed by the first boundary block line (21a) and the first center line (CL) according to the present embodiment may be 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).

[0127] Accordingly, the first boundary block line (21a) and the first center line (CL) according to the present embodiment can form an angle between the first minimum angle (wα2) and the first maximum angle (wα1).

[0128] In detail, when the 11th end (21aE1) of the first boundary block line (21a) according to the present embodiment 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 a first maximum angle (wα1), which is the maximum angle.

[0129] 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°.

[0130] In addition, when the 11th end (21aE1) of the first boundary block line (21a) according to the present embodiment 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 a first minimum angle (wα2), which is the minimum angle.

[0131] 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°.

[0132] Below, the diagonal slope of the second boundary block line (21b) based on the first center line (CL) according to the present embodiment will be described in detail.

[0133] The second boundary block line (21b) according to the present embodiment may include a 21st stage (21bE1) facing the end (12a) of the gas outlet (12) and a 22nd stage (21bE2) located on the opposite side of the 21st stage (21bE1).

[0134] As illustrated in FIG. 12, the angle formed by the second boundary block line (21b) and the first center line (CL) may have a variable value depending on the position at the 12th side (EGA12) of the 21st section (21bE1) of the second boundary block line (21b) and the position at the 14th side (EGA14) of the 22nd section (21bE2).

[0135] In detail, the position of the 14th side (EGA14) of the 21st section (21bE1) of the 2nd boundary block line (21b) can be located between the 3rd point (W3) and the 4th point (W2), and the 3rd point (W3) can be located at a point of the 14th side (EGA14) that is spaced apart from the 12th side (EGA12) by 0.05 EL2 (cm) when the length of the 14th side (EGA14) is EL2 (cm).

[0136] In addition, the position of the 12th side (EGA12) of the 21st section (21bE1) of the second boundary block line (21b) may be located between the end (12a) of the gas outlet (12) and the third point (W3) depending on the change in the position of the end (12a) of the gas outlet according to the change in the length of the gas outlet (12).

[0137] Referring to FIG. 12, according to the present embodiment, the maximum angle formed by the second boundary block line (21b) and the first center line (CL) may be the second maximum angle (wα3), and the minimum angle formed by the second boundary block line (21b) and the first center line (CL) may be the second minimum angle (wα4).

[0138] Accordingly, the second boundary block line (21b) and the first center line (CL) according to the present embodiment can form an angle between the second minimum angle (wα4) and the second maximum angle (wα3).

[0139] In detail, when the 21st end (21bE1) of the second boundary block line (21b) according to the present 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 a second maximum angle (wα3), which is the maximum angle.

[0140] 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°.

[0141] In addition, when the 21st end (21bE1) of the second boundary block line (21b) according to the present 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 a second minimum angle (wα4), which is the minimum angle.

[0142] 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°.

[0143] According to the present 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 have the same or different values ​​depending on the embodiment.

[0144] In addition, each of the plurality of first block lines (21) of the first block portion (20) according to the present embodiment and the first center line (CL) can form an angle between the first minimum angle (wα2) and the first maximum angle (wα1) or an angle between the second minimum angle (wα4) and the second maximum angle (wα3).

[0145] Here, the angles formed by each of the plurality of first block lines (21) of the first block section (20) according to the present embodiment and the first center line (CL) may have the same or different values ​​depending on the embodiment.

[0146] In addition, the angle formed by each of the plurality of first block lines (21) of the first block section (20) according to the present embodiment and the first center line (CL) and the angle formed by the first and second boundary block lines (21a, 21b) may have the same or different values ​​depending on the embodiment.

[0147] FIGS. 13 to 16 are drawings schematically illustrating changes in the areas of the first block portion (20), the second block portion (30), and the third block portion (40) according to changes in the angle formed by the first center line (CL) of FIG. 12 and the first and second boundary block lines.

[0148] According to the present embodiment, the first boundary block line (21a) may form a second angle (α2) with the first center line (CL), and the second boundary block line (21b) may form a third angle (α3) with the first center line (CL).

[0149] The second angle (α2) and the third angle (α3) may be acute angles exceeding 0 degrees and less than 90 degrees, which are diagonal inclinations of the first boundary block line (21a) and the second boundary block line (21b) installed between the gas inlet (11) and the gas outlet (12) arranged diagonally.

[0150] Here, the area ratio (%) of the areas of the first block portion (20), the second block portion (30), and the third block portion (40) in the total block portion area, which is the sum of the areas of the first block portion (20), the second block portion (30), and the third block portion (40), may vary depending on changes in at least one 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).

[0151] Referring to Fig. 13, the area of ​​the first block portion (20) divided by the first boundary block line (21a) forming the second angle (α2) with the first center line (CL) and the second boundary block line (21b) forming the third angle (α3) with the first center line (CL) is A1, the area of ​​the second block portion (30) is A2, and the area of ​​the third block portion (40) is A3.

[0152] Referring to FIGS. 13 and 14, the angle formed by the first a1 boundary block line (21a1) and the first center line (CL) is equal to the second angle (α2) formed by the first boundary block line (21a) and the first center line (CL), and the angle formed by the second a1 boundary block line (21b1) and the first center line (CL) is equal to the third angle (α3) formed by the second boundary block line (21b) and the first center line (CL).

[0153] However, the length (L1a1) of the 1a1 inlet (11a1) of the 1a1 inlet was modified to be shorter than the length (L1) of the first inlet (11).

[0154] In this way, when the 1a1 inlet length (L1a1) of the 1a1 inlet (11a1) becomes shorter than the inlet length (L1) of the first inlet (11), the 1a1 area (A2a1) of the 1a1 block portion (30a1) becomes larger than the second area (A2) of the second block portion (30) of FIG. 13, as shown in FIG. 13.

[0155] Additionally, the length (L2a1) of the second outlet (12a1) of the second outlet was modified to be shorter than the length (l2) of the first outlet (11).

[0156] In this way, when the length (L2a1) of the 2a1 outlet (12a1) of the 2a1 outlet becomes shorter than the outlet length (l2) of the 1st outlet (11), as shown in FIG. 14, the 2a1 area (A3a1) of the 2a1 block portion (40a1) becomes larger than the 3rd area (A3) of the 3rd block portion (40) of FIG. 13.

[0157] Here, the 1a1 area (A2a1) of the 1a1 block portion (30a1) and the 2a1 area (A3a1) of the 2a1 block portion (40a1) increase, so the 3a1 area (A1a1) of the 3a1 block portion (20a1) decreases.

[0158] Accordingly, according to the present embodiment, by modifying the 1a1 inlet length (L1a1) of the 1a1 inlet (11a1) to be shorter than the inlet length (L1) of the first inlet (11), and modifying the 2a1 outlet length (L2a1) of the 2a1 outlet (12a1) to be shorter than the outlet length (l2) of the first outlet (11), the ratio (%) of the 1a1 area (A2a1) of the 1a1 block portion (30a1) and the 2a1 area (A3a1) of the 2a1 block portion (40a1) in the total block portion area can be increased, and the ratio (%) of the 3a1 area (A1a1) of the 3a1 block portion (20a1) can be decreased.

[0159] Referring to FIG. 13 and FIG. 15, the inlet length (L1) of the gas inlet (11) and the first a2 length (L1a2) of the first a2 inlet (11a2) and the outlet length (L2) of the gas outlet (12) and the second a2 length (L2a2) of the second a2 gas outlet (12a2) are the same.

[0160] However, the first angle (α2a2) formed by the first boundary block line (21a2) and the first center line (CL) was modified to be greater than the second angle (α2) formed by the first boundary block line (21a) and the first center line (CL).

[0161] In this way, when the first a2 angle (α2a2) becomes larger than the second angle (α2), as shown in FIG. 15, 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) of FIG. 13.

[0162] In addition, the second angle (α3a2) formed by the second boundary block line (21b2) and the first center line (CL) was modified to be larger than the third angle (α3) formed by the second boundary block line (21b) and the first center line (CL).

[0163] In this way, when the second a2 angle (α3a2) becomes larger than the third angle (α3), as shown in FIG. 15, 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) of FIG. 13.

[0164] Here, the first a2 area (A2a2) of the first a2 block portion (30a2) and the second a2 area (A3a1) of the second a2 block portion (40a2) decrease, so the third a2 area (A1a2) of the third a2 block portion (20a2) increases.

[0165] Accordingly, according to the present embodiment, by making the first angle (α2a2) formed by the first 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 making the second angle (α3a2) formed by the second 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 (%) of the first area (A2a2) of the first a2 block portion (30a2) and the second area (A3a2) of the second a2 block portion (40a2) in the total block portion area can be lowered, and the ratio (%) of the third area (A1a2) of the third a2 block portion (20a2) can be increased.

[0166] Referring to FIG. 13 and FIG. 16, the 1a3 inlet length (L1a3) of the 1a3 inlet (11a3) is modified to be shorter than the inlet length (L1) of the first inlet (11), and the 2a3 outlet length (L2a3) of the 2a3 outlet (12a3) is modified to be shorter than the outlet length (L2) of the first outlet (12).

[0167] In addition, the first angle (α2a3) formed by the first boundary block line (21a3) and the first center line (CL) is modified 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 angle (α3a3) formed by the second boundary block line (21b3) and the first center line (CL) is modified to be larger than the second angle (α2) formed by the first boundary block line (21a) and the first center line (CL).

[0168] In this way, when the first a3 inlet length (L1a3) and the second a3 inlet length (L2a3) are shortened and the first a3 angle (α2a3) and the second a3 angle (α3a3) are increased, the first a3 area (A2a3) of the first a3 block portion (30a3) and the second a3 area (A2a3) of the second a3 block portion (40a3) decrease, and the third a3 area (A1a3) of the third a3 block portion (20a3) increases relatively.

[0169] Therefore, according to the present embodiment, the 1a3 inlet length (L1a3) is made shorter than the inlet length (L1) of the first inlet (11), the 2a3 outlet length (L2a3) is made shorter than the outlet length (L2) of the first outlet (12), the 1a3 angle (α2a3) is made larger than the second angle (α2) formed between the first boundary block line (21a) and the first center line (CL), and the 2a3 angle (α3a3) is made larger than the second angle (α2) formed between the first boundary block line (21a) and the first center line (CL), thereby lowering the ratio (%) of the 1a3 area (A2a3) of the 1a3 block portion (30a3) and the 2a3 area (A3a3) of the 2a3 block portion (40a3) in the total block portion area, and the 3a3 area (A3a3) of the 3a3 block portion (20a3) is made larger than the 2a3 area (A3a3) of the 3a3 block portion (20a3). The proportion (%) occupied by the area (A1a3) can be increased.

[0170] According to the fuel cell separator (100) according to the present embodiment, since more energy is produced in the first block portion (20) installed diagonally between the gas inlet (11) and the gas outlet (12) than in the second block portion (30) and the third block portion (40), the fuel cell separator can be used as a fuel cell separator suitable for either a mobility device or an energy storage device depending on the area ratio (%) of the first block portion (20) in the total area of ​​the block portion.

[0171] Specifically, when the area ratio (%) of the second block portion (30) and the third block portion (40) of the fuel cell separator (100) increases and the area ratio (%) of the first block portion (20) decreases, the energy supply per unit time increases as the gas movement speed per unit time in the first block portion (20) with a reduced gas passage area increases, so that rapid energy production, i.e., high energy production per unit time, can be achieved. Therefore, the fuel cell separator (100) with a reduced area ratio (%) of the first block portion (20) according to the present embodiment can be used in mobility devices such as automobiles and drones that have a large energy variability per unit time.

[0172] On the other hand, when the area ratio (%) of the second block portion (30) and the third block portion (40) of the fuel cell separator (100) decreases and the area ratio (%) of the first block portion (20) increases, the gas supply area and gas diffusion area in the first block portion (20) with a larger gas passage area increase, so that high energy per unit area can be produced. Therefore, the fuel cell separator (100) with an increased area ratio (%) of the first block portion (20) according to the present embodiment can be used in a stationary power generation fuel cell, such as an energy storage device, which requires low load fluctuation and continuous energy production.

[0173] The mechanism for controlling the fluidity of the flow field according to the area ratio (%) of the first block section (20), the second block section (30), and the third block section (40) is described in detail in the sections related to FIGS. 23 and 24.

[0174] Fig. 17 is a schematic drawing of the second block portion and the third block portion of Fig. 1, and Fig. 18 is a schematic drawing of the second block line of the second block portion of Fig. 17. In addition, Figs. 19 to 11 are schematic drawings of first to third modified examples of the second block line of the first block portion of Fig. 18.

[0175] Referring to FIG. 17, the second block portion (30) according to the present embodiment may include a plurality of second block lines (31) arranged at a second interval (G22) and forming a fourth angle (α4) with a first center line (CL) that passes through the center point of the main body (10) perpendicular to the first side (1) of the main body (10), and a plurality of second flow paths (32) formed between the plurality of second block lines (31).

[0176] Unlike the first angle (α1), the second angle (α2), and the third angle (α3) being acute angles, the fourth angle (α4) can have a value between 0 and 360 degrees as an inclination with respect to the first center line (CL) of the second block line (31), so the second block member (311) can have various shapes and arrangements as illustrated in FIG. 22.

[0177] Here, the angles formed by the first center line (CL) and each of the plurality of second block lines (31) may be the same or different, and by adjusting the angles formed by the first center line (CL) and each of the plurality of second block lines (31), the width of the flow path and the width of the flow path accordingly may be adjusted, thereby controlling the speed and flow rate of the fluid passing through the second block section (30).

[0178] In addition, each of the plurality of 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 parts (312) formed by the 21st interval (G21) and fluidly connecting the plurality of second flow paths (32).

[0179] As illustrated in Fig. 17, each of the plurality of second block lines (31) can be formed by aligning each of the plurality of second block members (311) at a certain interval while forming an angle with the first center line (CL).

[0180] In addition, a plurality of second flow paths (32) formed at a 22nd interval (G22) between a plurality of second block lines (31) in a plurality of second mixing sections (312) formed between a plurality of second block members (311) arranged at a 21st interval (G21) are fluidly connected, and a turbulent flow that fluidly connects the plurality of second flow paths (32) can be generated in the second mixing section (312).

[0181] In addition, the second flow path (32) that contacts the first boundary block line (21a) among the plurality of second flow paths (32) can be fluidly connected to the first block section (20) through the first a mixing section (212a) formed in the first boundary block line (21a).

[0182] According to the second block section (30) according to the present embodiment, a stagnant flow field having a different flow velocity and direction than the diagonal flow field formed between the gas inlet (11) and the gas outlet (12) can be formed.

[0183] The stagnant flow field formed in the second block section (30) is described in detail in the relevant parts of FIGS. 24 and 25.

[0184] Referring to FIGS. 18 to 21, the second block member (311) forming the second block line (31) according to the present embodiment may include one or more of a straight rib-shaped block, a columnar block, and a wave-shaped rib-shaped block.

[0185] In the following, detailed descriptions of common parts with those described with reference to Fig. 17 are omitted, and only necessary parts are briefly described.

[0186] Fig. 18 is a drawing schematically illustrating the second block line of the second block section of Fig. 17.

[0187] Referring to FIG. 18, each of the plurality of 2a1 block lines (31a1) may include a plurality of 21a1 mixing portions (312a1) formed between the plurality of 2a1 straight rib-shaped block members (311a1) and the plurality of 2a1 straight rib-shaped block members (311a1) arranged at a 21a1 interval (G21a1).

[0188] In addition, a plurality of second a1 block lines (31a1) may be arranged at a 22a1 interval (G22a1) to form a plurality of second a1 flow paths (32a1), and some of the plurality of second a1 mixing portions (312a1) 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).

[0189] Fig. 19 is a drawing schematically illustrating a first modified example of the second block line of the second block section of Fig. 18.

[0190] Referring to FIG. 19, each of the plurality of 2a2 block lines (31a2) may include a 2a2 rib-shaped block member (311a2) including a plurality of 2a21 straight rib-shaped block members (311a21) and a plurality of 2a22 column-shaped block members (311a22) arranged between the plurality of 2a21 straight rib-shaped block members (311a21), and a plurality of 2a2 mixing portions (312a2) formed between the plurality of 2a21 straight rib-shaped block members (311a21) and the plurality of 2a22 column-shaped block members (311a22) arranged at a 21a2 interval (G21a2).

[0191] In addition, a plurality of second a2 block lines (21a2) may be arranged at a 22a2 interval (G22a2) to form a plurality of second a2 flow paths (32a2), and some of the plurality of 32a2 mixing portions (312a2) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0192] Fig. 20 is a schematic drawing illustrating a second variation of the second block line of the second block section of Fig. 18.

[0193] Referring to FIG. 20, each of the plurality of second a3 block lines (31a3) may include a plurality of second a31 wave rib block members (311a3) and a plurality of third 2a3 mixing members (312a3) formed between the plurality of second a31 wave rib block members (311a3) arranged at a second 21a3 interval (G21a3).

[0194] In addition, a plurality of second a3 block lines (31a3) may be arranged at a 22a3 interval (G22a3) to form a plurality of second a3 flow paths (32a3), and some of the plurality of third 32a3 mixing portions (312a3) 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).

[0195] Fig. 21 is a schematic drawing illustrating a third modified example of the second block line of the second block section of Fig. 18.

[0196] Referring to FIG. 21, each of the plurality of 2a4 block lines (31a4) may include a 2a4 mixed rib block member (311a4) including a plurality of 2a41 wave-shaped rib block members (311a41) and a plurality of 2a42 column-shaped block members (311a42) arranged between the plurality of 2a41 wave-shaped rib block members (311a41), and a plurality of 2a4 mixed portions (32a4) formed between the plurality of 2a41 wave-shaped rib block members (311a41) and the plurality of 2a42 column-shaped block members (311a42) arranged at a 21a4 interval (G21a4).

[0197] In addition, a plurality of second-order block lines (31a4) may be arranged at a 21a4 interval (G21a4) to form a plurality of second-order flow paths (22t4), and some of the plurality of 12t4 mixing sections (212t4) may be arranged to be aligned in a straight line in the direction of an imaginary line (not shown) perpendicular to the first center line (CL).

[0198] However, the second block line (31) according to the present embodiment and the second block member (311) forming the same are not limited to the shape or arrangement described in FIGS. 18 to 21 and the related descriptions, and may be modified into block members having different shapes and block lines in which such block members are arranged in various orders.

[0199] Fig. 22 is a drawing schematically illustrating a plurality of other variations of the second block line of the second block section of Fig. 18.

[0200] Referring to FIG. 22, in addition to the shapes and arrangements described in FIGS. 18 to 21 and the related descriptions, the second block member (311) may include a half-moon shaped rib (A), a folded single rib (B), a dot-shaped rib (C), a vertically folded long rib (D), a wavy long rib (E), and a single rib and folded rib mixed rib (F).

[0201] In addition, the third block portion (40) according to the present embodiment may include a plurality of third block lines (41) arranged at a third interval (G31) and forming a fifth angle (α5) with a first center line (CL) that passes through the center point of the main body perpendicular to the first side (1) of the main body, and a plurality of third flow paths (42) formed between the plurality of third block lines (41).

[0202] Unlike the first angle (α1), the second angle (α2), and the third angle (α3) being acute angles, the fifth angle (α5) can have a value between 0 and 360 degrees as an inclination with respect to the first center line (CL) of the third block line (41), and as illustrated in FIG. 22, the third block member (411) can have various shapes and arrangements.

[0203] Here, the angles formed by the first center line (CL) and each of the plurality of third block lines (41) may be the same or different angles, and by adjusting the angles formed by the first center line (CL) and each of the plurality of third block lines (41), the width of the flow path and the width of the flow path accordingly may be adjusted, thereby controlling the speed and flow rate of the fluid passing through the third block section (40).

[0204] Additionally, each of the plurality of third block lines (411) may include 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 fluidly connecting a plurality of third flow paths (42).

[0205] As illustrated in Fig. 17, each of the plurality of third block lines (41) can be formed by aligning each of the plurality of third block members (411) at a certain interval while forming an angle with the first center line (CL).

[0206] In addition, a plurality of third flow paths (42) formed at a 32nd interval (G32) between a plurality of third block lines (41) in a plurality of third mixing sections (412) formed between a plurality of third block members (311) arranged at a 31st interval (G31) are fluidly connected, and a turbulent flow that fluidly connects the plurality of third flow paths (42) can be generated in the third mixing section (412).

[0207] In addition, the third euro (42) that contacts the second boundary block line (21b) among the plurality of third euros (42) can be fluidly connected to the first block part (20) through the first b mixing part (212b) formed in the second boundary block line (21b).

[0208] According to the third block section (40) according to the present embodiment, a stagnant flow field having a different flow velocity and direction than the diagonal flow field formed between the gas inlet (11) and the gas outlet (12) can be formed.

[0209] The stagnant flow field formed in the third block section (40) is described in detail in the relevant parts of FIGS. 24 and 25.

[0210] Here, the arrangement and shape (not shown) of the third block line (41) and the second block member (411) according to the present embodiment may be the same as the arrangement and shape of the second block line (31) and the second block member (311) described above, and therefore, a detailed description thereof is omitted.

[0211] FIG. 23 is a drawing schematically illustrating the flow of fluid in the first block portion and the second block portion of the fuel cell separator of FIG. 1, and FIG. 24 is a drawing schematically illustrating a composite flow field formed in the fuel cell separator of FIG. 1 by the flow of fluid of FIG. 23.

[0212] Referring to Fig. 23, air (Air(O2)) flowing into the gas inlet (11) can pass through a plurality of first flow paths (22) formed diagonally in the first block section (20) and become a plurality of main flows (Mainflow(MF)) directed toward the gas outlet (12) located in the diagonal direction. The plurality of main flows (Mainflow(MF)) formed in the diagonal direction can be fluidly connected to each other by a plurality of first mixing sections (212) in which a first turbulent flow (TF1)) is generated, and can be developed into a first flow field (First flow field) in the diagonal direction.

[0213] Referring to FIG. 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).

[0214] A first linear diagonal flow field (LF1) can be formed along an imaginary line (IL) connecting the centers of the opposite sides of the gas inlet (11) and the gas outlet (12).

[0215] In detail, the first linear diagonal flow field (LF1) can be developed as a linear flow field in which a plurality of main flows (MF) located on the left and right of an imaginary line (IL) are connected to each other by a plurality of first mixing parts (212) and flow in a diagonal direction between a gas inlet (11) and a gas outlet (12). That is, the first linear diagonal flow field (LF1) can be formed by the flow of a plurality of main flows (MF) that exhibit a linear diagonal flow form centered on an imaginary line (IL) between a gas inlet (11) and a gas outlet (12) located in a diagonal direction.

[0216] A first curved diagonal flow field (CF1) can be formed between the second block section (30) and the first linear diagonal flow field (LF1) with the second block section (30) as the boundary.

[0217] In detail, the first curved diagonal flow field (CF1) can be developed into a curved flow field in which a plurality of main flows (MF) connected to each other by a first linear diagonal flow field (LF1) and a plurality of first mixing portions (212) between the first boundary block line (21a) and the fourth side (4) flow in a diagonal direction between the gas inlet (11) and the gas outlet (12). That is, as illustrated in FIG. 24, the first curved diagonal flow field (CF1) can be formed by the flow of a plurality of main flows (MF) formed in a curved section formed between the first linear diagonal flow field (LF1) and the first boundary block line (21a) and the fourth side (4).

[0218] Additionally, a second curved diagonal flow field (CF2) can be formed between the third block section (40) and the first linear diagonal flow field (LF1) with the third block section (40) as the boundary.

[0219] In detail, the second curved diagonal flow field (Curved diagonal flow field (CF2)) can be developed into a curved flow field in which a plurality of main flows (Mainflows (MF)) connected to each other by a plurality of first mixing portions (212) between the first linear diagonal flow field (Linear diagonal flow field (LF1)) and the second boundary block line (21b) and the third side (3) flow in a diagonal direction between the gas inlet (11) and the gas outlet (12). That is, as illustrated in FIG. 24, the second curved diagonal flow field (Curved diagonal flow field (CF2)) can be formed by the flow of a plurality of main flows (Mainflows (MF)) formed in a curved section formed between the first linear diagonal flow field (Linear diagonal flow field (LF1)) and the second boundary block line (21b) and the fourth side (4).

[0220] However, the gas flow generated in each boundary region (not shown) of the first curved diagonal flow field (CF1) according to the present embodiment, the second flow field (second flow field) formed in the second block portion (30), and the first linear diagonal flow field (LF1)) does not form an independent flow field such as the first flow field to the third flow field, and therefore, a detailed description thereof is omitted.

[0221] Referring again to FIG. 23, the gas (e.g., air (Air(O2))) introduced into the gas inlet (11) can be supplied to the second block section (30) through the side of the second block section (30) adjacent to the end (11a) of the gas inlet (11) and the first a mixing section (212a) of the first boundary block line (21a). Here, as illustrated in FIG. 22, the gas (e.g., air (Air(O2))) supplied to the second block section (30) through the first a mixing section (212a) of the first boundary block line (21a) is turbulent, and the turbulent flow supplied in this manner is again supplied as turbulent flow to each of the plurality of second flow paths (32) through the plurality of mixing sections (212) fluidly connecting the plurality of second flow paths (32).

[0222] In addition, since the gas inlet (11) and the first block part (22) face each other in the direction in which gas (e.g., air (Air(O2))) flows in, most of the gas (e.g., air (Air(O2))) flowing in through the gas inlet (11) is supplied to the first block part (20) through the first flow path (22), and since the second block part (30) is positioned spaced apart from the end (11a) of the gas inlet (11), a very small amount of gas (e.g., air (Air(O2))) other than the air supplied to the first block part (22) is supplied to the side of the second block part (30).

[0223] Accordingly, a second flow field is formed in the second block portion (30) installed adjacent to the first corner area (A1) of the first side (1) of the main body (10) by the complex turbulent flow described above.

[0224] Referring again to FIG. 24, the second flow field formed in the second block section (30) may include a plurality of first turbulent stagnant flow fields (TSF1) directed toward the first corner region (A1), a plurality of second turbulent stagnant flow fields (TSF2) returning from the first corner region (A1), and a plurality of third turbulent stagnant flow fields (TSF3) formed in a direction away from the first corner region (A1).

[0225] In addition, a third flow field may be formed in the third block portion (40). However, the second flow field formed in the second block portion (30) and the third flow field formed in the third block portion (40) are formed by the same mechanism, and the flow field forming the third flow field and the flow field forming the second flow field are identical to each other, so a detailed description of the third flow field is omitted.

[0226] The fluidity including the flow velocity (flow amount) of the first straight diagonal flow field (LF1) and the first to second curved diagonal flow fields (CF1, CF2) described above can be adjusted by the length (L1) of the gas inlet (11) and the length (L2) of the gas outlet, the second and third angles (α2, α3) formed by the first and second boundary block lines (21a, 21b) and the first center line (CL), and each of the plurality of first block lines (21) depending on the change in the value of the first angle (α1) with the first center line (CL).

[0227] Referring again to FIGS. 13 to 16, when the length (L1) of the gas inlet (11) and the length (L1) of the gas outlet are reduced, the area ratio (%) of the second block portion (30) and the third block portion (40) of the fuel cell separator (100) increases and the area ratio (%) of the first block portion (20) decreases.

[0228] As the area ratio (%) of the first block section (20) is reduced in this way, the curved section where the first and second curved diagonal flow fields (CF1, CF2) are formed is reduced, and thus the first and second curved diagonal flow fields (CF1, CF2) are also reduced, so the movement ratio of the gas introduced into the first block section (20) by the first linear diagonal flow field (LF1) increases.

[0229] Here, since the gas movement distance 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, CF2), when the gas movement ratio by the first linear diagonal flow field (LF1) increases, the gas movement speed per unit time and the energy supply per unit time supplied to the first block section (20) can increase.

[0230] Accordingly, the fuel cell separator (100) according to the present embodiment can be selectively applied to mobility devices and energy storage devices, etc., since the fluidity quality including the flow velocity (flow amount) of the first linear diagonal flow field (LF1) and the first to second curved diagonal flow fields (CF1, CF2) can be controlled according to the length (L1) of the gas inlet (11), the length (L2) of the gas outlet, the second and third angles (α2, α3) formed by the first and second boundary block lines (21a, 21b) and the first center line (CL), and the value of the first angle (α1) between each of the plurality of first block lines (21) and the first center line (CL).

[0231] FIG. 25 is a drawing schematically illustrating a flow path of fluid and H2O in a fuel cell cell including the fuel cell separator of FIG. 1, FIG. 26 is a drawing schematically illustrating a flow path of fluid and H2O in the fuel cell separator of FIG. 1 in the fuel cell cell of FIG. 25, and FIG. 27 is a drawing schematically illustrating a flow path of fluid and H2O in the fuel cell separator into which hydrogen flows in the fuel cell cell of FIG. 24.

[0232] Referring to FIG. 25, the fuel cell cell (1000) includes 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) positioned between the fuel cell cathode separator (100a) and the fuel cell anode separator (200a), a first gasket (400a) and a first diffusion layer (500a) positioned between the fuel cell cathode separator (100a) and the membrane electrode assembly (MEA) (300a), and a second gasket (600a) positioned between the fuel cell anode separator (200a) and the membrane electrode assembly (MEA) (300a). It can be formed by a second diffusion layer (700a).

[0233] Here, the fuel cell separator (100) according to the present example and the fuel cell cathode separator (100a) included in the fuel cell cell (1000) have the same configuration. However, the block line of the fuel cell anode separator (100a) of the cell (1000) is not limited to being formed to form an angle with the first center line (CL), and may be formed in a direction parallel to the first center line (CL) or may be formed in a meandering flow path structure that does not form a constant angle with the center line of the first center line (CL).

[0234] If the H2O generated in the membrane electrode assembly (300a) during operation of the fuel cell cell (1000) is not discharged smoothly and a H2O flooding phenomenon occurs, the power generation efficiency of the fuel cell cell (1000) may be reduced or may cause a malfunction.

[0235] In addition, if excessive H2O generated in the membrane electrode assembly (300a) during operation of the fuel cell cell (1000) is discharged and the membrane electrode assembly (300a) dries out, the power generation efficiency may decrease or the membrane electrode assembly (300a) may be damaged.

[0236] The H2O flooding phenomenon of the membrane electrode assembly (300a) mentioned above or the drying phenomenon of the membrane electrode assembly can be prevented by the first block portion (20) in which a first flow field is formed, which is composed of a first linear diagonal flow field (LF1), a first curved diagonal flow field (CF1), and a second curved diagonal flow field (CF2) of the fuel cell separator (100) according to the present embodiment, and the second block portion (30) and the third block portion (40) in which second and third flow fields are formed, which are composed of a plurality of turbulent stagnant flow fields.

[0237] Hereinafter, with reference to FIGS. 25 to 27, the H2O flooding phenomenon of the membrane electrode assembly (300a) by the fuel cell separator (100) and the prevention of the drying phenomenon of the membrane electrode assembly will be described in detail.

[0238] As illustrated in Fig. 25, when air (Air(O2)) is supplied to the fuel cell cathode separator (100a), some of the supplied air (Air(O2)) moves to the membrane electrode assembly (300a) through the first diffusion layer (500a). In addition, when hydrogen (Hydrogen (H2)) is supplied to the fuel cell anode separator (200a), the supplied hydrogen (Hydrogen (H2)) is 2e - +2H +It is decomposed and moves to the membrane electrode assembly (300a) through the second diffusion layer (600a). In this way, air (Air(O2))(1 / 2O2) and hydrogen (H2))(2e) moved to the membrane electrode assembly (300a) - +2H + ) are combined in the membrane electrode assembly (300a) to generate H2O. The H2O generated in the membrane electrode assembly (300a) is supplied to the membrane electrode assembly (300a), but does not react with hydrogen (H2) and is discharged together with air (Air(O2)) discharged to the fuel cell cathode separator (100a) through the first gas diffusion layer (500a) (①).

[0239] Here, in the first block portion (20) of the fuel cell separator (100) according to the present embodiment, H2O generated in the membrane electrode assembly (300a) facing the first block portion (20) can be smoothly discharged by the turbulent flow generated in the plurality of first mixing portions (212) together with the laminar flow in the first flow path (22). In addition, H2O generated in the membrane electrode assembly (300a) can be smoothly discharged by the turbulent stagnant flow field formed by the plurality of second and third mixing portions (312, 412) and the plurality of second and third flow paths (32, 42) in the second and third block portions (30, 40).

[0240] Therefore, according to the fuel cell separator (100) according to the present embodiment, H2O generated in the membrane electrode assembly (300a) is smoothly discharged from the first block portion to the third block portion (20, 30, 40), so that the H2O flooding phenomenon in the membrane electrode assembly (300a) can be prevented.

[0241] The H2O discharged in this manner can move in the diagonal direction by the first flow field (see Fig. 23) including the first linear diagonal flow field (LF1), the first curved diagonal flow field (CF1), and the second curved diagonal flow field (CF2) formed in the fuel cell cathode separator (100a) and be discharged through the gas outlet (12) (②).

[0242] The area ⓐ of the fuel cell cathode separator (100a) illustrated in Fig. 25 is the area of ​​the fuel cell cathode separator (100a) facing the first diffusion layer (500a), and corresponds to the second block portion (30) (see Fig. 24) according to the present embodiment.

[0243] In the region ⓐ of the fuel cell cathode separator (100a) corresponding to the second block portion (30) according to the present embodiment, a second flow field including a turbulent stagnant flow field (TSF1 to TSF3) (see FIG. 24) can be generated.

[0244] As described above, H2O generated in the membrane electrode assembly (300a) can be smoothly discharged to the ⓐ region of the fuel cell cathode separator (100a) by the turbulent stagnant flow field (TSF1 to TSF3) generated in the ⓐ region.

[0245] However, since the H2O discharged from the membrane electrode assembly (300a) to the region ⓐ of the fuel cell cathode separator (100a) is not discharged smoothly toward the gas outlet (12) due to the turbulent stagnant flow field (TSF1 to TSF3) generated in the region ⓐ, the concentration of H2O in the region ⓐ increases as the fuel cell (1000) is operated.

[0246] In the area ⓑ of the fuel cell cathode separator (100a) corresponding to the third block section (40) according to the present embodiment, a third flow field including a turbulent stagnant flow field (TSF1 to TSF3) (not shown) can be generated.

[0247] However, the description of H2O discharge from the membrane electrode assembly (300a) in the area ⓑ of the fuel cell cathode separator (100a) shown in Fig. 25 to the area ⓑ and the description of H2O discharge and H2O concentration increase from the area ⓑ of the fuel cell cathode separator (100a) to the gas outlet (12) are the same as the description in the area ⓐ of the fuel cell cathode separator (100a), so detailed descriptions thereof are omitted below.

[0248] Referring to Figure 25, when the concentration of H2O in areas ⓐ and ⓑ exceeds a certain level, the H2O in area ⓐ moves to area ⓓ of the fuel cell anode separator (200a) (③) due to the difference in concentration, and the H2O in area ⓑ moves to area ⓒ of the anode separator (200a) (④).

[0249] In this way, the H2O moved to the ⓒ area of ​​the fuel cell anode separator (200a) can move (⑤) through the fuel cell anode separator (200a) by hydrogen (H2) flowing into the fuel cell anode separator (200a).

[0250] In this way, H2O moved to the fuel cell anode separator (200a) can move (⑥) to the membrane electrode assembly (300a) by electroendosmosis generated by the operation of the fuel cell (1000).

[0251] Additionally, some of the H2O in the ⓐ region of the fuel cell cathode separator (100a) may be supplied (⑦) to the membrane electrode assembly (300a) without diffusing to the ⓒ region.

[0252] Accordingly, according to the fuel cell separator (100) according to the present embodiment, a three-dimensional H2O circulation path can be generated, which consists of processes ①->② (H2O discharge from the fuel cell cathode separator (100a)) and ④->⑤ (H2O discharge from the fuel cell anode separator (200a)) in which H2O is discharged to the outside of the fuel cell cell (1000) from the membrane electrode assembly (300a), and processes ①->(③ and ④)->⑤->⑥ and process ⓐ area->⑦ in which H2O generated in the fuel cell cell (1000) is circulated inside the fuel cell cell (1000).

[0253] Ultimately, by the three-dimensional H2O circulation path of the fuel cell cell (1000) including the fuel cell separator (100) according to the present embodiment, H2O generated in the membrane electrode assembly (300a) can be smoothly discharged to the outside of the fuel cell cell (1000), thereby preventing the H2O flooding phenomenon, and by the three-dimensional H2O circulation path, some of the H2O discharged from the membrane electrode assembly (300a) can be supplied to the membrane electrode assembly (300a), thereby preventing the membrane electrode assembly (300a) from drying out.

[0254] As described above, according to the fuel cell cell (1000) to which the fuel cell separator (100) according to the present embodiment is applied, moisture can be supplied to the membrane electrode assembly (300a) by a three-dimensional H2O circulation path penetrating the fuel cell cell (1000) without supplying an external humidifying medium.

[0255] According to the fuel cell cell (1000) including the fuel cell separator (100) according to the present embodiment, there is no need to install a humidifying device for humidifying the fuel cell cell (1000) in the fuel cell system (not shown), so the overall volume and weight of the fuel cell system can be reduced.

[0256] Figure 28 is a schematic drawing of a fuel cell separator according to a second embodiment of the present invention.

[0257] Referring to FIG. 28, the fuel cell separator (200) according to the present embodiment may include a main body (210), a first block portion (220), a second block portion (230), a third block portion (240), and a pair of fluid passages.

[0258] Hereinafter, a detailed description of the main body (10), the first block portion (20), the second block portion (30), and the third block portion (40) of the fuel cell separator (100) according to the first embodiment of the present invention illustrated in FIGS. 1 to 23, and the main body (210), the first block portion (220), the second block portion (230), and the third block portion (240) according to the second embodiment of the present invention, which have the same configuration, will be omitted.

[0259] Referring to FIG. 28, a pair of fluid passages of a fuel cell separator (200) according to the present embodiment may be installed parallel to a first center line (CL) that passes through the center point of the main body (210) and perpendicular to the first side (1) of the main body (210), and spaced apart from each other with a first block portion (220), a second block portion (230), and a third block portion (240) therebetween.

[0260] FIG. 29 is a schematic drawing of a pair of fluid passages of the fuel cell separator of FIG. 28.

[0261] Referring to FIG. 29, a pair of fluid passages according to the present embodiment may include a first fluid passage (250) and a second fluid passage (260).

[0262] According to the present 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 portion (220) and the third block portion (240).

[0263] In detail, the first fluid passage (250) may be installed to face one end (11b) of the gas inlet (11) by extending 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 of the first block portion (220).

[0264] In addition, according to the present embodiment, the second fluid passage (250) 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 portion (220) and the second block portion (230).

[0265] In detail, the second fluid passage (260) may be installed to face one end (12b) of the gas outlet (12) by extending 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 of the second block portion (230).

[0266] According to 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 portion (230).

[0267] 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) are described in detail below.

[0268] However, in the following, the flow of fluid in the first block portion (220), the second block portion (230), and the third block portion (240) of the fuel cell separator (200) according to the second embodiment of the present invention and the first block portion (20), the second block portion (30), and the third block portion (40) of the fuel cell separator (100) of FIG. 1 illustrated in FIG. 23 is the same, so a detailed description thereof is omitted.

[0269] In addition, the flow paths of fluid and H2O in the fuel cell including the fuel cell separator (200) according to the second embodiment of the present invention and the fuel cell including the fuel cell separator (100) of FIG. 1 as shown in FIG. 25 are the same, so a detailed description thereof will be omitted.

[0270] FIG. 30 is a schematic drawing of a composite flow field formed in a fuel cell separator including a pair of fluid passages of FIG. 28, and FIG. 31 is a schematic drawing of a flow path of fluid and H2O in the fuel cell separator of FIG. 28 in the fuel cell of FIG. 25.

[0271] According to the present embodiment, the 21st flow field (First flow field21) formed in the first block section (220) may include a 21st linear diagonal flow field (Linear diagonal flow field (LF21)), a 21st curved diagonal flow field (Curved diagonal flow field (CF21)), and a 22nd curved diagonal flow field (Curved diagonal flow field (CF22).

[0272] Here, the formation mechanisms of the 21st linear diagonal flow field (Linear diagonal flow field (LF21)), the 21st curved diagonal flow field (Curved diagonal flow field (CF21)) and the 22nd curved diagonal flow field (Curved diagonal flow field (CF22)) according to the present embodiment and the formation mechanisms of the 1st linear diagonal flow field (Linear diagonal flow field (LF1)), the 1st curved diagonal flow field (Curved diagonal flow field (CF1)) and the 2nd curved diagonal flow field (Curved diagonal flow field (CF2)) of FIG. 24 are the same, so a detailed description thereof will be omitted below.

[0273] The 22nd flow field (second flow field22) formed in the second block section (230) according to the present embodiment may include a plurality of first turbulent stagnant flow fields (TSF21), a plurality of second turbulent stagnant flow fields (TSF22), and a plurality of third turbulent stagnant flow fields (TSF23).

[0274] Here, the 23rd flow field (third flow field23) formed in the third block section (240) is formed by the same mechanism as the 22nd flow field (second flow field22) formed in the second block section (230), so a detailed description thereof is omitted below.

[0275] Referring again to Figure 28, the fluid flow velocity (flow amount) decreases as it moves away from the gas inlet (11), and the flow velocity (flow amount) of the 22nd curved diagonal flow field (CF22) decreases as it moves from the gas inlet (11) toward the gas outlet (12) due to energy loss caused by turbulence and friction occurring on the first side of the first block portion (220).

[0276] In addition, as the 22nd curved diagonal flow field (CF22) flows from the gas inlet (11) to the gas outlet (12), the amount of oxygen (O2) carried by the 22nd curved diagonal flow field (CF22) decreases.

[0277] In addition, as shown in Fig. 31, as development progresses, H2O may accumulate excessively in the ⓑ area of ​​the third block section (240), causing a H2O flooding phenomenon.

[0278] According to the present embodiment, the decrease in the flow velocity (flow amount) of the 22nd curved diagonal flow field (CF22), the decrease in the amount of oxygen (O2), and the H2O flooding phenomenon of the 3rd block section (240) can be prevented by the 22nd linear flow field (LF22) formed in the 1st fluid passage (250).

[0279] In detail, the first fluid passage (250) is installed in a straight line along the side of the first block portion (220) and the third block portion (240) between the first side (1) and the second side (2), and a 22nd straight flow field (LF22) is formed by the fluid flowing into the first fluid passage (250) from the gas inlet (11).

[0280] Here, in the 22nd linear flow field (LF22), the fluid flows along a straight path without frictional resistance, so the flow velocity (flow quantity) of the 22nd linear flow field (LF22) is faster than the flow velocity (flow quantity) of the 22nd curved diagonal flow field (CF22) formed by passing through a plurality of block lines including a plurality of block members and a mixing section of the first block section (220), and the flow quantity also increases accordingly.

[0281] Accordingly, as illustrated in FIG. 30, fluid and oxygen (O2) contained in the fluid are supplied to the 22nd curved diagonal flow field (CF22) in the 22nd linear flow field (LF22) flowing in the direction from the first side (1) to the second side (2), and by supplying the fluid and oxygen (O2), a decrease in the flow velocity (flow amount) of the 22nd curved diagonal flow field (CF22) can be prevented and a decrease in the amount of oxygen (O2) can be prevented.

[0282] In addition, since some of the H2O accumulated in the area ⓑ by the fluid supplied to the third block section (240) in the 22nd linear flow field (LF22) is discharged (⑧) to the gas outlet (12), the H2O flooding phenomenon in the third block section (240) can be prevented.

[0283] Referring again to Figure 28, the fluid flow velocity (flow amount) decreases as it moves away from the gas inlet (11), and the flow velocity (flow amount) of the 21st curved diagonal flow field (CF21) decreases as it moves from the gas inlet (11) toward the gas outlet (12) due to energy loss caused by turbulence and friction occurring on the second side of the first block portion (220).

[0284] In addition, the membrane electrode assembly (300a) in the portion through which the 21st curved diagonal flow field (CF21) passes may experience a drying phenomenon due to the dry air supplied through the inlet (11) and the heat generated by power generation.

[0285] In addition, as shown in Fig. 31, as development progresses, H2O may accumulate excessively in the ⓐ area of ​​the second block section (230), causing a H2O flooding phenomenon.

[0286] According to the present embodiment, the decrease in the flow velocity (flow amount) of the 21st curved diagonal flow field (CF21), the drying phenomenon of the membrane electrode assembly (300a), and the H2O flooding phenomenon of the 2nd block portion (230) can be prevented by the 21st linear flow field (LF21) formed in the 2nd fluid passage (260).

[0287] In detail, the second fluid passage (250) is installed in a straight line along the side of the first block portion (220) and the second block portion (230) between the first side (1) and the second side (2), and a 23rd straight flow field (LF23) is formed by the fluid flowing into the second fluid passage (260) from the second block portion (230).

[0288] Here, in the 23rd straight flow field (LF23), the fluid flows along a straight path without frictional resistance, so the flow velocity (flow quantity) of the 23rd straight flow field (LF23) is faster than the flow velocity (flow quantity) of the 21st curved diagonal flow field (CF21) formed by passing through a plurality of block lines including a plurality of block members and a mixing section of the first block section (220), and the flow quantity also increases accordingly.

[0289] Accordingly, as illustrated in FIG. 30, fluid is supplied from the 23rd linear flow field (LF23) flowing in the direction from the first side (1) to the second side (2) to the 21st curved diagonal flow field (CF21), and by supplying this fluid, a decrease in the flow velocity (flow amount) of the 21st curved diagonal flow field (CF21) can be prevented.

[0290] In addition, as illustrated in FIG. 31, some of the H2O accumulated in the second block portion (230) is discharged from the second block portion (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.

[0291] In addition, as illustrated in FIG. 31, some of the H2O accumulated in the second block section (230) is discharged (⑨) from the second block section (230) to the gas outlet (12) by the 23rd linear flow field (LF23), thereby preventing the H2O flooding phenomenon of the second block section (230).

[0292] FIG. 32 is a graph image comparing the cell voltage (V) behavior over time of 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, and FIG. 33 is an enlarged graph image of part S1 of FIG. 32.

[0293] The cell voltage ((Cell Voltage(V))) behavior according to time (seconds) of 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 is measured in an unhumidified state in which no humidifier is used for the novel fuel cell cell and the conventional fuel cell.

[0294] In addition, conventional fuel cell cells have a conventional fuel cell separator in which a plurality of straight flow paths fluidly connecting the inlet and outlet are formed between the inlet and outlet.

[0295] In addition, it was analyzed that the voltage behavior of the fuel cell to which the fuel cell separator according to the second embodiment of the present invention was applied and the voltage behavior of the fuel cell to which the fuel cell separator according to the first embodiment of the present invention was applied were almost similar. Therefore, a detailed description of the voltage behavior of the fuel cell to which the fuel cell separator according to the first embodiment of the present invention was applied is omitted below.

[0296] Referring to FIG. 32, it was analyzed that the cell voltage (NTV) of a novel fuel cell to which a fuel cell separator according to the second embodiment of the present invention is applied shows a voltage of about 0.725 V at the time of cell operation, and then stabilizes to a voltage between about 0.718 V and 0.719 V after about 60 seconds (P1) after the start of operation.

[0297] Afterwards, the voltage measurement results of the new fuel cell according to the second embodiment of the present invention were analyzed to show a stable voltage behavior between about 0.718 V and 0.719 V for about 10 minutes or more (about 3900 seconds).

[0298] However, referring to FIGS. 32 and 33, it was analyzed that the cell voltage (PTV) of a conventional fuel cell to which a conventional fuel cell separator is applied begins to rapidly decrease (P2) to below 0.7 V after the start of operation, and decreases to below about 0.69 V approximately 60 seconds after the start of operation, after which the cell operation is stopped.

[0299] As seen above, it can be seen that the operation of the fuel cell is impossible due to a rapid decrease in the fuel cell voltage (V) in a non-humidified state in which a humidifying device is not applied according to the conventional fuel cell separator applied to the conventional fuel cell cell.

[0300] However, it can be seen that the fuel cell separator according to the second embodiment of the present invention applied to a new fuel cell cell can stably operate the fuel cell by maintaining the cell voltage of the fuel cell stably even in a non-humidified state in which no humidifying device is applied.

[0301] Conventional fuel cell systems have increased in volume and weight due to the humidifier and auxiliary devices for its operation, which has limited the devices and technical fields to which fuel cell systems can be applied.

[0302] Accordingly, according to a fuel cell system (not shown) including a fuel cell separator (100, 200) according to the present embodiment, a humidifying device and auxiliary devices for its operation are not required, so the volume and weight of the fuel cell system can be significantly reduced, and thus the devices and technical fields to which the fuel cell system can be applied can be expanded.

[0303] In addition, according to the fuel cell system including the fuel cell separator (100, 200) according to the present embodiment, the price of the fuel cell system can be lowered due to the elimination of the humidifier and auxiliary devices for its operation, thereby increasing price competitiveness in the related technical field.

[0304] Although the present invention has been described with reference to specific embodiments, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. A body (10) including a gas inlet (11) formed along a first side (1) and a gas outlet (12) formed along a second side (2) positioned diagonally from the gas inlet (11) and facing the first side; A first block part (20) installed in the diagonal direction and fluidly connecting the gas inlet and the gas outlet; A second block portion (30) installed adjacent to the first edge area (A1) of the first side located opposite the gas inlet so as to be fluidly connected to the first block portion; and A fuel cell separator comprising a third block portion (40) installed adjacent to a second edge area (A2) of the second side located opposite the gas outlet so as to be fluidly connected to the first block portion.

2. In paragraph 1, The above first block part is, A fuel cell separator comprising a plurality of first block lines (21) arranged at an eleventh interval (G11) and forming a first angle (α1) with a first center line (CL) that passes through the center point of the main body and is perpendicular to the first side of the main body, and a plurality of first flow paths (22) formed between the plurality of first block lines.

3. In paragraph 2, Each of the above plurality of first block lines (21) is A fuel cell separator comprising a plurality of first block members (211) arranged at 12 intervals (G12) and a plurality of first mixing parts (212) formed by the 12 intervals (G12) and fluidly connecting the plurality of first flow paths (22).

4. In paragraph 2, The above plurality of first block lines (21) are: A fuel cell separator including 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. In paragraph 4, The above 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 parts (212a) formed by the 11a interval (G11a) and fluidly connected to the plurality of first flow paths (22). The above second boundary block line (21b) is A fuel cell separator comprising a plurality of first b block members (211b) arranged at 11b intervals (G11b) and a plurality of first b mixing parts (212b) formed by the 11b intervals (G11b) and fluidly connected to the plurality of first flow paths (22).

6. In paragraph 4, A fuel cell separator in which 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 paragraph 6, The ratio (%) of the area of ​​each of the first block portion (20), the second block portion (20), and the third block portion (40) in the total block portion area, which is the sum of the areas of the first block portion (20), the second block portion (30), and the third block portion (40), is A fuel cell separator, wherein the fuel cell separator changes depending on one or more of the second angle (α2), the third angle (α3), the length (L1) at the inlet of the gas inlet, and the length (L2) at the outlet of the gas outlet.

8. In paragraph 1, The above second block part (30) is A fuel cell separator comprising a plurality of second block lines (31) arranged at a second interval (G22) and forming a fourth angle (α4) with a first center line (CL) that passes through the center point of the main body and is perpendicular to the first side of the main body, and a plurality of second flow paths (32) formed between the plurality of second block lines (31).

9. In paragraph 8, A fuel cell separator, wherein each of the plurality of second block lines (31) includes a plurality of second block members (311) arranged at a 21st interval (G21) and a plurality of second mixing parts (312) formed by the 21st interval (G21) and fluidly connecting the plurality of second flow paths (32).

10. In paragraph 1, The above third block part (40) is, A fuel cell separator comprising a plurality of third block lines (41) arranged at a third interval (G31) and forming a fifth angle (α5) with a first center line (CL) that passes through the center point of the main body and is perpendicular to the first side of the main body, and a plurality of third flow paths (42) formed between the plurality of third block lines.

11. In paragraph 10, A fuel cell separator, wherein 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 parts (412) formed by the 31st interval (G31) and fluidly connecting the plurality of third flow paths (42).

12. In paragraph 1, A fuel cell separator further comprising a pair of fluid passages (250, 260) that are installed spaced apart from each other with the first block portion (20), the second block portion (30), and the third block portion (40) interposed therebetween, and are parallel to a first center line (CL) that passes through the center point of the main body and is perpendicular to the first side of the main body.

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

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