Combined fuel cell

Abstract

The invention relates to a combined fuel cell. The cell comprises a cell frame; a plurality of diaphragms, each diaphragm including a cooling medium guide extending from the manifold bore and having a selected area; a plurality of support protrusions protruding from the guide portion of each of the partitions toward the cooling surface and spaced apart from each other, and including a cooling medium flow field between the spaced apart protrusions; and an adhesive medium between the reaction surfaces on the guide portions of each of the battery frame and the separators to provide a coupling force to each of the separators and the battery frame. Wherein the adhesive medium does not overlap the plurality of support protrusions on the guide portion.

Description

Technical Field

[0001] The present disclosure relates to a unitized fuel cell. Background Art

[0002] A fuel cell is a power generation device that converts the chemical energy of a fuel into electrical energy through an electrochemical reaction of the fuel in a stack. Fuel cells can not only supply driving power for industry, homes, buildings, aviation, and vehicles, but can also be used to supply power for small electronic products such as portable devices. Recently, as an efficient and clean energy source, the use of fuel cells is gradually expanding.

[0003] The membrane electrode assembly (MEA) is located at the innermost position of the unit cell of a general fuel cell. The MEA consists of a polymer electrolyte membrane that can move protons, and an anode and a cathode, which are electrodes arranged so that hydrogen and oxygen can react on both sides of the electrolyte membrane.

[0004] Further, a gas diffusion layer (GDL) is stacked outside the MEA, ie, outside where the anode and cathode are located. A separator having a flow field is located outside the GDL to supply fuel and discharge water generated by the reaction.

[0005] By stacking a plurality of unit cells configured as described above in series, a fuel cell stack is formed to generate a desired level of power from the fuel cells. In the fuel cell stack, end plates are attached to the outermost unit cells among the unit cells to support and fix the plurality of unit cells.

[0006] Generally, in order to maintain the airtightness of unit cells and ensure the convenience of a stacking process, a power generating assembly (EGA) integrating an MEA and a GDL may be manufactured and used.

[0007] Recently, research has been conducted on a battery frame integrating an EGA and a frame supporting the EGA.

[0008] One of the results of this research was the creation of an elastic frame around the edges of the EGA.

[0009] The elastic frame is made by making a sheet frame using a heat-sealable thermoplastic elastomer (TPE), and then joining the sheet frame to the EGA by heat sealing. In this case, due to the heat and pressure provided during heat sealing for joining, the EGA may be damaged or the elastic frame may be deformed.

[0010] Furthermore, since the elastic frame is bonded to the separator made of a metal material by heat sealing, a problem occurs in that bonding between the separator and the elastic frame cannot be achieved at a desired level. Therefore, when a fuel cell stack is manufactured by stacking unit cells, the unit cells may not be aligned with each other.

[0011] On the other hand, when such an EGA is manufactured and used, the amount of electrolyte membrane used can be reduced, thereby reducing costs. However, when a stack is manufactured by simply stacking several components, the battery assembly tolerance increases, it is difficult to replace only the batteries in the stack that are determined to be defective batteries, and there is a limit to improving the productivity of the stack.

[0012] In addition, the following technologies need to be developed: ensuring the required flow field for the cooling medium while maximizing the area of ​​the reaction zone compared to the entire cell area, perfectly performing sealing, and optimizing the flow field to improve cooling efficiency.

[0013] The description provided above as a related art of the present disclosure is to help understanding the background of the present disclosure and should not be construed as necessarily being included in the well-known related art. Summary of the invention

[0014] The present disclosure relates to a combined fuel cell integrated into a battery unit for easy assembly and maintenance, and more particularly, to a combined fuel cell that has excellent sealing for a cooling medium, is easy to ensure the flow field of the cooling medium, and has excellent cooling efficiency due to small deformation of the flow field, thereby effectively preventing degradation of the fuel cell.

[0015] The embodiments of the present disclosure provide a combined fuel cell that has excellent sealing for a cooling medium, is easy to ensure a flow field of the cooling medium, and has excellent cooling efficiency due to small deformation of the flow field, thereby effectively preventing degradation of the fuel cell.

[0016] In an embodiment of the present disclosure, a combined fuel cell includes: a cell frame, which is connected by a power generation assembly (EGA) and a frame; a plurality of partitions, which are stacked on both sides of the cell frame, each partition including a reaction surface facing the cell frame on a first side, a cooling surface through which a cooling medium flows on a second side, and a manifold hole through which the cooling medium flows at an end, and each partition includes a cooling medium guide portion extending from the manifold hole and having a predetermined area; a plurality of support protrusions, which protrude from the guide portion of each of the partitions toward the cooling surface and are spaced apart from each other, and include a cooling medium flow field between the spaced apart protrusions; and an adhesive medium, which is arranged between the reaction surfaces on the guide portion of the cell frame and each of the partitions to provide a coupling force to each of the partitions and the cell frame, and is arranged at a point on the guide portion that does not overlap with the plurality of support protrusions.

[0017] The EGA may be constructed by coupling an electrolyte membrane, an electrode, and a gas diffusion layer, a frame may be formed of a plastic material, and the EGA and the frame may be integrally coupled to form a battery frame.

[0018] Each of the separators and the cell frame may be integrally coupled by an adhesive medium, so that a pair of separators and the cell frame disposed between the pair of separators may form a combined unit fuel cell.

[0019] One fuel cell and another adjacent fuel cell may be stacked such that cooling surfaces of the separators face each other, and a gasket may be located between the facing separators to seal the cooling medium.

[0020] One fuel cell and another adjacent fuel cell may be stacked so that the cooling surfaces of the separators face each other, and the two separators whose cooling surfaces face each other may be supported by the support protrusions in the guide portion.

[0021] The two separators to which the cooling surfaces face may be formed such that support protrusions are formed at corresponding points in the guide portion, so that the support protrusions of the two separators may be supported while ends thereof are in contact with each other.

[0022] The two partitions to which the cooling surfaces face may be formed such that the support protrusions are offset from each other in the guide portion so that an end portion of each of the support protrusions may contact and be supported on the guide portion of the opposing partition.

[0023] The plurality of support protrusions may be arranged to be spaced apart from each other in a direction intersecting a flow direction of the cooling medium flowing through the guide portion.

[0024] The plurality of support protrusions may be arranged to be spaced apart from each other in a direction intersecting a flow direction of the cooling medium in the guide portion to form a layer, and the plurality of layers may be arranged to be spaced apart from each other in the flow direction of the cooling medium.

[0025] The cooling medium flow fields formed in adjacent layers may be arranged to be aligned along a direction in which the cooling medium flows.

[0026] The bonding medium may have a line shape formed in a direction intersecting with a flow direction of the cooling medium.

[0027] A plurality of support protrusions may be arranged to be spaced apart from each other in a direction intersecting the flow direction of the cooling medium in the guide portion to form a layer, and the adhesive medium may have a line shape formed in a direction intersecting the flow direction of the cooling medium at points spaced apart from the layer formed by the support protrusions.

[0028] A plurality of support protrusions may be arranged to be spaced apart from each other along a direction intersecting the flow direction of the cooling medium in the guide portion to form layers, a plurality of layers may be arranged to be spaced apart from each other along the flow direction of the cooling medium, and the adhesive medium may have a linear shape formed between the plurality of layers in a direction intersecting the flow direction of the cooling medium.

[0029] A plurality of support protrusions may be arranged to be offset from each other along a direction intersecting the flow direction of the cooling medium in the guide portion to form a zigzag layer, and the adhesive medium may have a zigzag line shape formed along a direction intersecting the flow direction of the cooling medium and avoiding the support protrusions.

[0030] Each of the partitions may be made of a metal material, and the support protrusion may be formed and shaped such that a point of a guide portion protrudes toward the cooling surface.

[0031] According to the present disclosure, the combined fuel cell has excellent sealing for the cooling medium, is easy to ensure the flow field of the cooling medium, and has excellent cooling efficiency due to small deformation of the flow field, thereby effectively preventing the fuel cell from deteriorating. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features and advantages of the embodiments of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is an exploded perspective view showing a combined fuel cell according to an embodiment of the present disclosure;

[0034] Figure 2 and Figure 3 is a view showing a guide portion of a separator of a combined fuel cell according to an embodiment of the present disclosure;

[0035] Figure 4 is along Figure 3 A cross-sectional view taken along line AA' of FIG. 1 shows a combined fuel cell according to an embodiment of the present disclosure;

[0036] Figure 5 is along Figure 3 A cross-sectional view taken along line BB' of FIG. 1 shows a combined fuel cell according to an embodiment of the present disclosure;

[0037] Figure 6 is along Figure 3 A cross-sectional view taken along line CC' of FIG. 1 , showing a combined fuel cell according to an embodiment of the present disclosure;

[0038] Figure 7 is along Figure 3 A cross-sectional view taken along line D-D' of FIG. 1 , showing a combined fuel cell according to an embodiment of the present disclosure;

[0039] Figure 8 and Fig. 9 is a cross-sectional view showing a combined fuel cell according to an embodiment of the present disclosure; and

[0040] Fig.10 is with Figure 3 The diagrams correspond to and illustrate a bonding medium of a combined fuel cell according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components may be given the same reference numerals regardless of the figure numbers and not be unnecessarily repeatedly described.

[0042] In the following description, if it is determined that the detailed description of the known technology related to the present disclosure makes the subject matter of the embodiments described herein unclear, the detailed description may be omitted. Further, the drawings are provided to facilitate understanding of the embodiments disclosed in the specification, the technical spirit disclosed in the specification is not necessarily limited by the drawings, and all changes, equivalent forms and alternative forms may be understood to be included in the spirit and scope of the present disclosure.

[0043] Terms including ordinal numbers such as "first", "second", etc. may be used to describe various components, but the components are not necessarily construed as being limited to these terms. For example, these terms may be used to distinguish one component from another component.

[0044] Unless the context clearly indicates otherwise, a singular form may include a plural form.

[0045] It can be further understood that the terms "including" or "having" used in this specification may specify the existence of stated features, numbers, steps, operations, components, parts or their combinations, but do not exclude the existence or addition of one or more other features, numbers, steps, operations, components, parts or their combinations.

[0046] It is understood that when an element is referred to as being “connected to” or “coupled to” another element, the element may be directly connected to or directly coupled to the other element, or connected to or coupled to the other element with other elements interposed between the two elements. On the other hand, it is understood that when an element is referred to as being “directly connected to” or “directly coupled to” another element, the element may be connected to or coupled to the other element without other elements interposed between the two elements.

[0047] Figure 1 is an exploded perspective view showing a combined fuel cell according to an embodiment of the present disclosure. Figure 2 and Figure 3is a view showing a guide portion of a separator of a combined fuel cell according to an embodiment of the present disclosure. Figure 4 is along Figure 3 The cross-sectional view taken along the line AA' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 5 is along Figure 3 The cross-sectional view taken along the line BB' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 6 is along Figure 3 The cross-sectional view taken along the line CC' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 7 is along Figure 3 The cross-sectional view taken along the line D-D' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 8 and Fig. 9 is a cross-sectional view showing a combined fuel cell according to another embodiment of the present disclosure. Fig.10 is with Figure 3 The figure corresponds to and shows a bonding medium of a combined fuel cell according to another embodiment of the present disclosure.

[0048] The combined fuel cell according to an embodiment of the present disclosure includes: a cell frame 100, which is formed by connecting a power generation assembly (EGA) and a frame 160; a plurality of separators 300 and 300', which are stacked on both sides of the cell frame 100, respectively, and include a reaction surface facing the cell frame 100 on one side of the plurality of separators 300 and 300', and include a cooling surface through which a cooling medium flows on the other side of the plurality of separators 300 and 300', and include a manifold hole 310 through which a cooling medium flows at the end of the plurality of separators 300 and 300', and the plurality of separators 300 and 300' include a plurality of separators extending from the manifold hole 310 and A cooling medium guide portion 330 having a predetermined or selected area; a plurality of support protrusions 350, which protrude from the guide portion 330 of each of the partitions 300 and 300' toward the cooling surface and are spaced apart from each other, and a cooling medium flow field C is formed between the spaced apart protrusions; and an adhesive medium 370, which is located between the battery frame 100 and the reaction surface on the guide portion 330 of each of the partitions 300 and 300' to provide a coupling force to each of the partitions 300 and 300' and the battery frame 100, and is arranged at a point on the guide portion 330 that does not overlap with the plurality of support protrusions 350.

[0049] Figure 11 is an exploded perspective view showing a combined fuel cell according to an embodiment of the present disclosure. The fuel cell of the present disclosure may be configured such that an EGA and a frame 160 are integrated to form a cell frame 100. The EGA may be configured such that an electrolyte membrane and an electrode are coupled to form an MEA 120. The EGA may be formed by coupling a gas diffusion layer (GDL) 140 to both sides of the MEA 120.

[0050] The frame 160 may be used to support the EGA. The frame 160 may be made of various materials, and may be formed of a plastic material by injection molding, for example. The frame 160 may be made of a plastic material having a thermal expansion coefficient of 40×10 -6 The engineering plastic or super engineering plastic having a temperature of 1000-10000 W or less is formed by injection molding, and can be formed in a three-dimensional structure by, for example, injection molding, injection / compression hybrid molding, compression molding, or 3D printing.

[0051] The EGA may be attached to the frame 160 using an adhesive or the like. Further, the frame 160 may be injection molded with the EGA inserted therein. Through these methods, the EGA and the frame 160 may be integrated into the battery frame 100.

[0052] The battery frame 100 may be located between the separators 300 and 300'. The separators 300 and 300' may be composed of an anode separator and a cathode separator. Air may be introduced between the anode separator and the EGA and flow therebetween, and hydrogen may be supplied between the cathode separator and the EGA and flow therebetween.

[0053] One side of each of the separators 300 and 300' facing the EGA may form a reaction surface, while the opposite side may form a cooling surface. The gasket 500 may be coupled to the cooling surface of the anode separator or the cathode separator to seal the cooling medium. In an embodiment, after the EGA and the frame 160 are coupled to form the battery frame 100, the separators 300 and 300' may be attached to both sides of the battery frame 100, respectively, and the gasket 500 may be coupled to the separator 300 or 300' to form a unit fuel cell. This may be defined as a combined fuel cell.

[0054] The EGA may be constructed by coupling an electrolyte membrane, an electrode, and a gas diffusion layer. The frame 160 may be formed of a plastic material. The EGA and the frame 160 may be integrally coupled to form the cell frame 100. Further, each of the separators 300 and 300' and the cell frame 100 may be integrally coupled by an adhesive medium 370, so that a pair of separators 300 and 300' and the cell frame 100 between the pair of separators 300 and 300' may form a combined unit fuel cell.

[0055] Further, one fuel cell and another adjacent fuel cell may be stacked such that cooling surfaces of the separators 300 and 300 ′ face each other, and the gasket 500 may be located between the facing separators 300 and 300 ′ to seal the cooling medium.

[0056] In the case of a combined fuel cell, a unit cell can be manufactured and transported independently, each cell can be connected in a stacked manner and then divided into battery cells, thereby facilitating disassembly, maintenance, and recycling.

[0057] When the fuel cell is stacked, the gasket 500 may be disposed between the anode separator and the cathode separator, and a cooling medium may be introduced and flowed between the facing cooling surfaces to cool the fuel cell. As for the cooling medium, various media such as a coolant or a special refrigerant may be applied.

[0058] Figure 2 and Figure 3 is a view showing a guide portion of a separator of a combined fuel cell according to an embodiment of the present disclosure.

[0059] The cooling medium may perform cooling while flowing between the cooling surfaces of the facing partitions 300 and 300'. A manifold hole 310 for introducing and discharging the cooling medium may be formed at both ends of the partition 300 or 300'. The manifold hole may be formed to introduce and circulate the cooling medium as well as air and hydrogen. Therefore, three manifold holes may be formed at each end of the partition. The manifold hole described in the embodiments of the present disclosure may refer to a hole through which the cooling medium flows. Figure 2 A manifold hole 310 is shown through which a cooling medium may be introduced / exhausted. A gasket 500 may be placed around the periphery of the manifold hole 310 to seal the cooling medium.

[0060] Further, the cooling medium introduced from the manifold hole 310 may be guided to the cooling surface of the partition 300 or 300'. The guide portion 330 may be provided on the partition 300 or 300' and extend from the manifold hole 310 to the cooling surface. The guide portion 330 may be in the form of a flat plate and may define a specific flow field. In an embodiment, when the cooling medium flows between the guide portions 330 facing each other on the cooling surfaces of the partitions 300 and 300', the cooling medium may be guided to the cooling surfaces of the partitions 300 and 300'.

[0061] Therefore, with respect to the facing guides 330, the cross-sectional area of ​​the flow field can be maintained by maintaining a constant distance between the guides 330. In an embodiment, this can maintain a constant cooling efficiency of the fuel cell, can prevent degradation due to local overheating of the fuel cell by reducing the cooling deviation between the cells, and can achieve thermal balance between the cells.

[0062] According to an embodiment of the present disclosure, a support protrusion 350 may be formed on the guide portion 330 to support the flow field space between the guide portions 330 of the partitions 300 and 300'. The partitions 300 and 300' may be made using various materials and methods. According to an embodiment of the present disclosure, in view of support strength, thermal conductivity, formability, etc., the partition may be formed of a metal material. Therefore, the partitions 300 and 300' may be made of a metal material, and the support protrusion 350 may be formed and shaped so that some points of the guide portion 330 protrude toward the cooling surface.

[0063] The support protrusion 350 may protrude from the guide portion of the separators 300 and 300 ′ toward the cooling surface, may be composed of a plurality of protrusions spaced apart from each other, and may form a cooling medium flow field at points between the spaced apart support protrusions. Figure 3 is a diagram showing a completed thermocouple unit cell of the embodiment when viewed from one side. Figure 3 The partition visible in the Figure 3 The partitions which are not visible in the figure face each other, and the guide parts are spaced apart from each other. In the facing guide parts, the support protrusions can protrude toward the cooling space.

[0064] The embodiment of the present disclosure corresponds to the case where the support protrusion 350 protrudes half the height of the entire cooling medium flow field from each guide portion 330. One fuel cell and another adjacent fuel cell can be stacked so that the cooling surfaces of the separators face each other, and the two separators 300 and 300' can be supported by each other through the support protrusion 350 in the guide portion 330.

[0065] In the two baffles 300 and 300' facing the cooling surface according to the embodiment of the present disclosure, the support protrusions 350 can be formed at corresponding points in the guide part 330, so the support protrusions 350 of the two baffles 300 and 300' can be supported while their ends are in contact with each other. The molding depth of the support protrusions 350 may not be deep, so the formability of the baffles 300 and 300' can be increased, and the support protrusions 350 can easily obtain the required strength.

[0066] Figure 4 is along Figure 3 The cross-sectional view taken along the line AA' shows Figure 3The combined fuel cell according to an embodiment of the present disclosure is shown. As shown, the support protrusions 350 may be arranged in a direction intersecting with the direction of the cooling medium flow, and may be spaced apart from each other at regular intervals. Further, the facing support protrusions 350 may be formed to protrude toward each other at the same position, so that the ends of the facing support protrusions 350 contact each other to be supported within the cooling medium flow field. A cooling medium flow field C may be formed between the support protrusions 350 to allow the cooling medium to flow through the cooling medium flow field C. Therefore, the support protrusions 350 may support the guide portion 330, and may be used simultaneously to maintain the cross-sectional area and form the cooling medium flow field C.

[0067] Figure 5 is along Figure 3 The cross-sectional view taken along the line BB' shows Figure 3 The combined fuel cell according to an embodiment of the present disclosure is shown. It can be seen that the points where the support protrusions 350 are not located can form a predetermined or selected flow field C with a predetermined or selected cross-sectional area. The support protrusions 350 can be used to support the flow field C so that the depth of the flow field C remains constant.

[0068] Figure 6 is along Figure 3 The cross-sectional view taken along the line CC' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 6 A state in which the combined fuel cell is cut along the direction in which the cooling medium flows is shown. The support protrusions 350 may be arranged at regular intervals. Figure 7 is along Figure 3 The cross-sectional view taken along the line D-D' shows Figure 3 A combined fuel cell according to an embodiment of the present disclosure is shown. Figure 7 An embodiment is shown in which there is no supporting protrusion and the flow field C is formed to maintain a straight line along the flow of the cooling medium.

[0069] As shown in the figure, the plurality of support protrusions 350 may be arranged to be spaced apart from each other along a direction intersecting with a flow direction of the cooling medium flowing through the guide portion 330. Figure 4 As shown, a plurality of support protrusions 350 may be arranged to be spaced apart from each other along a direction intersecting the flow direction of the cooling medium in the guide portion 330 to form a layer, and a plurality of layers may be arranged to be spaced apart from each other along the flow direction of the cooling medium. In the illustrated embodiment, it is shown that the support protrusions may form two layers. Figure 3 As shown, it can be seen that a layer close to the manifold hole may be formed by support protrusions A1 to A5, and another layer spaced apart from the layer is formed by support protrusions B1 to B5.

[0070] Further, the cooling medium flow fields C formed in adjacent layers can be arranged to be aligned along the direction of the cooling medium flow. Therefore, even if multiple layers are formed, the flow fields C formed between the support protrusions 350 can be aligned in a row, thereby allowing the cooling medium to flow stably.

[0071] On the other hand, the separators 300 and 300' may be attached to the cell frame 100 by the adhesive medium 370, thereby forming one unit fuel cell. In particular, the adhesive medium 370 may be provided between the reaction surface in the guide portion 330 of the separator 300 or 300' and the cell frame 100 to provide a coupling force to the separator 300 or 300' and the cell frame 100, thereby achieving sealing of the cooling medium.

[0072] Further, the adhesive medium 370 may be provided at a point on the guide portion 330 that does not overlap with the plurality of support protrusions 350. Since the partitions 300 and 300' may be sheet metal, when the support protrusions 350 are formed by pressing or the like, a protruding shape may appear on the cooling surface of the partition 300 or 300', and a concave shape may appear on the reaction surface. Therefore, in order to exhibit the attachment performance of the adhesive medium 370, the adhesive medium 370 may be applied to a point on the reaction surface of the partition 300 or 300' that avoids the support protrusions 350 formed in a groove shape, and thus actual bonding may be continuously achieved without interruption.

[0073] Therefore, the adhesive medium 370 may be disposed at a point on the guide portion 330 that does not overlap with the plurality of support protrusions 350 .

[0074] The adhesive medium 370 may have a linear shape formed in a direction intersecting with the flow direction of the cooling medium. With such a shape, sealing can be maintained, and the adhesive medium 370 may be formed in a continuous linear shape without interruption.

[0075] More specifically, a plurality of support protrusions 350 may be arranged to be spaced apart from each other along a direction intersecting the flow direction of the cooling medium in the guide portion 330 to form a layer, and the adhesive medium 370 may have a line shape formed in a direction intersecting the flow direction of the cooling medium at points spaced apart from the layer formed by the support protrusions 350.

[0076] In particular, when the support protrusion 350 forms two layers as in the embodiment of the present disclosure, the two layers may be spaced apart from each other, and the adhesive medium 370 may be located at a point between the spaced apart layers, such as Figure 2 In this case, the adhesive medium 370 may form a predetermined line without interruption regardless of the shape of the groove in the reaction surface of the separator 300 or 300 ′ due to the support protrusion 350 . Fig.10 A state in which the adhesive medium 370 forms a predetermined line is shown.

[0077] The plurality of support protrusions 350 may be arranged to be spaced apart from each other in a direction intersecting the flow direction of the cooling medium in the guide portion 330 to form a layer, and the plurality of layers may be arranged to be spaced apart from each other in the flow direction of the cooling medium. The adhesive medium 370 may have a line shape formed between the plurality of layers in a direction intersecting the flow direction of the cooling medium.

[0078] Figure 8 and Fig. 9 is a cross-sectional view showing a combined fuel cell according to another embodiment of the present disclosure. Figure 8 Corresponding to along Figure 3 The fuel cell is intercepted by the line A-A' Figure 4 . Fig. 9 Corresponding to the intercept along the line C-C' Figure 6 Cross-sectional view of .

[0079] The two baffles 300 and 300' facing the cooling surfaces may be formed so that the support protrusions 350 are offset from each other in the guide portion 330 so that the ends of the support protrusions 350 may contact and be supported on the guide portion 330 of the opposing baffle. Instead of protruding each of the support protrusions 350 halfway so that the support protrusions contact each other inside, one support protrusion 350 may protrude high to the opposing guide portion 330, and the end of one support protrusion 350 may be supported on the opposing guide portion 330.

[0080] For this shape, the support protrusions 350 of the separators 300 and 300' facing each other may be formed at offset points rather than corresponding points. Even in this case, except for only the height of each support protrusion 350, the overall configuration of the layer through the support protrusion 350 may be the same, and there may be no substantial difference in the configuration of the flow field. Likewise, the adhesive medium 370 may be applied along the points where the support protrusion 350 is not formed.

[0081] However, in each of the partitions 300 and 300', the support protrusions 350 may be arranged as follows. Fig.10 That is, based on Figure 3 , the support protrusions A1, A3, A5, B2 and B4 can be formed on the guide portion of one partition, and the support protrusions A2, A4, B1, B3 and B5 can be formed on the guide portion of another partition. Fig.10 The arrangement shown is on partitions 300 and 300'.

[0082] Fig.10 is with Figure 3A view corresponding to and showing a bonding medium of a combined fuel cell according to another embodiment of the present disclosure. In this case, a plurality of support protrusions 350 may be arranged to be offset from each other along a direction intersecting the flow direction of the cooling medium in the guide portion 330 to form a zigzag layer, and the bonding medium 370 may have a zigzag line shape formed along a direction intersecting the flow direction of the cooling medium and avoiding the support protrusions 350.

[0083] The adhesive medium 370 can be applied in a zigzag shape between the support protrusions 350, so the straight-line distance between the layers of the support protrusions 350 can be designed to be shorter. Even if the gap between the layers is thus reduced, the required line width of the adhesive medium 370 can be maintained. Therefore, in an embodiment, the entire area of ​​the guide portion 330 can be reduced while maintaining the adhesive force, and the reaction area of ​​the fuel cell can be increased.

[0084] As described above, the embodiments of the present disclosure can provide a combined fuel cell that has excellent sealing for cooling medium, easily ensures the flow field of cooling medium, and has excellent cooling efficiency due to small deformation of the flow field, thereby effectively preventing degradation of the fuel cell.

[0085] Although the present disclosure is provided above with respect to the specific embodiments shown in the accompanying drawings, it will be apparent to those skilled in the art that the embodiments of the present disclosure may be changed and modified in various ways without departing from the scope of the present disclosure as described in the appended claims.

Claims

1. A combined fuel cell, comprising: The battery frame is formed by connecting the power generation assembly, namely the EGA, and the frame; A plurality of separators are stacked on both sides of the battery frame, each separator including a reaction surface facing the battery frame on a first side, a cooling surface through which a cooling medium flows on a second side, a manifold hole through which a cooling medium flows at an end, and each separator including a cooling medium guide portion extending from the manifold hole and having a predetermined area; a plurality of support protrusions protruding from the guide portion of each of the plurality of baffles toward the cooling surface and spaced apart from each other, and including a cooling medium flow field between the spaced apart protrusions; as well as An adhesive medium is disposed between the cell frame and the reaction surface on the guide portion of each of the plurality of separators to provide a coupling force to each of the plurality of separators and the cell frame, and the adhesive medium does not overlap the plurality of support protrusions on the guide portion.

2. The battery according to claim 1, wherein The EGA includes an electrolyte membrane, electrodes and a gas diffusion layer coupled together, The frame comprises a plastic material, and The EGA and the frame are integrally coupled to form the battery frame.

3. The battery according to claim 1, wherein Each of the plurality of separators and the battery frame are integrally coupled using the adhesive medium.

4. The battery according to claim 1, wherein The plurality of support protrusions are arranged to be spaced apart from each other in a direction intersecting a flow direction of the cooling medium passing through the guide portion.

5. The battery according to claim 1, wherein The plurality of support protrusions are arranged in a direction intersecting a flow direction of the cooling medium passing through the guide portion and are spaced apart from each other to form a layer, and a plurality of the layers are arranged in the flow direction of the cooling medium and are spaced apart from each other.

6. The battery according to claim 5, wherein The cooling medium flow fields formed in adjacent layers are arranged to be aligned along the direction in which the cooling medium flows.

7. The battery according to claim 1, wherein The bonding medium has a linear shape formed in a direction intersecting with a flow direction of the cooling medium.

8. The battery according to claim 1, wherein The plurality of support protrusions are arranged and spaced apart from each other to form a layer in a direction intersecting a flow direction of the cooling medium passing through the guide portion, and the adhesive medium has a line shape formed in a direction intersecting the flow direction of the cooling medium at a point spaced apart from the layer.

9. The battery according to claim 1, wherein The plurality of support protrusions are arranged along a direction intersecting with a flow direction of the cooling medium passing through the guide portion and are spaced apart from each other to form layers, the plurality of layers are arranged along the flow direction of the cooling medium and are spaced apart from each other, and the adhesive medium has a linear shape formed between the plurality of layers in a direction intersecting with the flow direction of the cooling medium.

10. The battery according to claim 1, wherein The plurality of support protrusions are arranged to be offset from each other along a direction intersecting a flow direction of the cooling medium passing through the guide portion to form a zigzag layer, and the adhesive medium has a zigzag line shape formed along a direction intersecting the flow direction of the cooling medium and avoiding the plurality of support protrusions.

11. The battery according to claim 1, wherein Each of the plurality of partitions is made of a metal material, and the plurality of support protrusions are formed and shaped such that points of the guide portions protrude toward the cooling surface.

12. A fuel cell device comprising: The first combined fuel cell; A second combined fuel cell, each combined fuel cell comprising: The battery frame is formed by connecting the power generation assembly, namely the EGA, and the frame; A plurality of separators are stacked on both sides of the battery frame, each separator including a reaction surface facing the battery frame on a first side, a cooling surface through which a cooling medium flows on a second side, a manifold hole through which a cooling medium flows at an end, and each separator including a cooling medium guide portion extending from the manifold hole and having a predetermined area; a plurality of support protrusions protruding from the guide portion of each of the plurality of baffles toward the cooling surface and spaced apart from each other, and including a cooling medium flow field between the spaced apart protrusions; and an adhesive medium disposed between the cell frame and the reaction surface on the guide portion of each of the plurality of separators to provide a coupling force to each of the plurality of separators and the cell frame, wherein each of the plurality of separators and the battery frame are integrally coupled using the adhesive medium, The first combined fuel cell is stacked on the second combined fuel cell, and cooling surfaces of separators of the first combined fuel cell and the second combined fuel cell face each other; and A gasket is disposed between facing baffles to form a coolant seal.

13. The device according to claim 12, wherein: The adhesive medium does not overlap the plurality of support protrusions on the guide portion.

14. A fuel cell device comprising: The first combined fuel cell; as well as A second combined fuel cell, each combined fuel cell comprising: The battery frame is formed by connecting the power generation assembly, namely the EGA, and the frame; A plurality of separators are stacked on both sides of the battery frame, each separator including a reaction surface facing the battery frame on a first side, a cooling surface through which a cooling medium flows on a second side, a manifold hole through which a cooling medium flows at an end, and each separator including a cooling medium guide portion extending from the manifold hole and having a predetermined area; a plurality of support protrusions protruding from the guide portion of each of the plurality of baffles toward the cooling surface and spaced apart from each other, and including a cooling medium flow field between the spaced apart protrusions; and an adhesive medium disposed between the battery frame and the reaction surface on the guide portion of each of the plurality of separators to provide a coupling force to each of the plurality of separators and the battery frame, and the adhesive medium does not overlap with the plurality of support protrusions on the guide portion, wherein each of the plurality of separators and the battery frame are integrally coupled using the adhesive medium, The first combined fuel cell is adjacent to the second combined fuel cell, and The first combined fuel cell and the second combined fuel cell are stacked so that cooling surfaces of separators face each other, and the two separators whose cooling surfaces face each other are supported by the supporting protrusions in the guide portion.

15. The device according to claim 14, wherein: The two separators that the cooling surface faces are formed such that support protrusions are formed at corresponding points in the guide portion, so that the support protrusions of the two separators are supported while ends of the support protrusions of the two separators are in contact with each other.

16. The apparatus according to claim 14, wherein: The two partitions facing the cooling surface are formed so that the support protrusions are offset from each other in the guide portion so that an end of each of the support protrusions contacts and is supported on the guide portion of the opposing partition.

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