FUEL CELL MODULE

Abstract

In one embodiment, a fuel cell module may include a fuel cell stack, an end plate configured to cover one end of the fuel cell stack based on a stacking direction of the unit cells, a clamp member configured to surround the fuel cell stack and support the fuel cell stack, a shell configured to surround the fuel cell stack and the clamp member, and an elastic member, and an elastic member provided to be elastically compressible between the end of the end plate and the shell based on the stacking direction of the unit cells, wherein the elastic member is configured to define a variable volume space between the end of the end plate and the shell such that the variable volume varies depending on a volume change of the fuel cell stack.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a fuel cell module. BACKGROUND

[0002] A fuel cell stack refers to a type of power generation device that generates electrical energy through a chemical reaction of fuel (for example, hydrogen), and the fuel cell stack may be configured such that several dozen or hundreds of fuel cells (unit cells) are stacked in series or sequentially.

[0003] The fuel cell may include a membrane electrode assembly (MEA) with an electrolyte membrane configured to allow positive hydrogen ions to flow through it, and electrodes (catalyst electrode layers) coupled to two opposing surfaces of the electrolyte membrane and configured to facilitate a reaction between hydrogen and oxygen. The fuel cell may also include gas diffusion layers (GDLs) arranged to be in close contact with two opposing surfaces of the membrane electrode assembly and configured to distribute reactant gases and transfer the generated electrical energy, as well as separators (bipolar plates) arranged to be in close contact with the gas diffusion layers and configured to define flow paths.

[0004] Furthermore, a pair of end plates are provided, which are connected by a fastening member (clamp member or strap) at two opposite ends of the plurality of fuel cells constituting the fuel cell stack. The fuel cells can be supported by the end plates to maintain their surface pressure (a frictional contact state can be maintained).

[0005] If the surface pressure and fastening force (fastening load) are concentrated at a specific location on the fuel cell stack, the fuel cell stack may deform and become damaged, resulting in a deterioration in its creep rupture performance. Therefore, it is important to ensure that the surface pressure and fastening force acting on the fuel cell stack are as uniform as possible.

[0006] However, the prior art has the problem that when the volume of the fuel cell stack changes (a length of the fuel cell stack in the unit cell stacking direction increases), the surface pressure and fastening force (fastening load) are concentrated at a specific location in the fuel cell stack. Therefore, it is difficult to apply a completely uniform surface pressure (internal pressure) to the fuel cell stack.

[0007] In particular, since the prior art fastener partially supports a specific location of the end plate, there is a problem that a portion not supported by the fastener (a portion not in contact with the fastener) is deformed (bent) when the volume of the fuel cell stack is changed. For this reason, there is a problem that it is difficult to apply a completely uniform surface pressure (internal pressure) to the fuel cell stack, and a load is concentrated at a specific location in the fuel cell stack.

[0008] Therefore, various studies have recently been conducted to minimize deformation and damage of the fuel cell stack and improve safety and reliability, but the study results are still insufficient. Accordingly, there is a need to develop a technology that minimizes deformation and damage of the fuel cell stack and improves safety and reliability. DEPICTION

[0009] Some embodiments of the present disclosure relate to a fuel cell module, and more particularly, to a fuel cell module capable of minimizing deformation and damage of a fuel cell stack and improving safety and reliability.

[0010] An embodiment of the present disclosure may be made in an effort to provide a fuel cell module capable of minimizing deformation and damage of a fuel cell stack and improving safety and reliability.

[0011] An embodiment of the present disclosure may also be made in an effort to apply a completely uniform surface pressure and fastening force to a fuel cell stack.

[0012] An embodiment of the present disclosure may also be made, among other things, in an effort to apply a completely uniform surface pressure and fastening pressure to a fuel cell stack when a volume of the fuel cell stack changes.

[0013] An embodiment of the present disclosure may also be made in an effort to improve sealing, watertightness, and dustproofness while ensuring creep rupture performance of the fuel cell stack.

[0014] An embodiment of the present disclosure may also be made in an effort to improve the performance of cooling a fuel cell stack.

[0015] The advantages that can be achieved by an embodiment are not limited to the advantages mentioned above, but also include advantages or effects that can result from the solutions or embodiments described below.

[0016] To achieve the above-mentioned advantages, an embodiment of the present disclosure provides a fuel cell module comprising: a fuel cell stack realized by stacking a plurality of unit cells; an end plate configured to cover one end of the fuel cell stack based on a stacking direction of the unit cells; a bracket member configured to surround the fuel cell stack and support the fuel cell stack;an enclosure configured to surround the fuel cell stack and the clamp member, and an elastic member provided to be elastically compressible between the end of the end plate and the enclosure based on the stacking direction of the unit cells, wherein the elastic member is configured to define a variable-volume space positioned between the end of the end plate and the enclosure and having a volume that varies depending on a volume change of the fuel cell stack;

[0017] This serves to minimize deformation and damage to the fuel cell stack and improve safety and reliability. This means that if the surface pressure and fastening force (fastening load) are concentrated at a specific location in the fuel cell stack, the fuel cell stack may deform and be damaged, and the creep rupture performance may deteriorate. Therefore, it is desirable that the surface pressure and fastening force applied to the fuel cell stack be as uniform as possible. However, the prior art has the problem that the surface pressure and fastening force (fastening load) are concentrated at a specific location in the fuel cell stack when the volume of the fuel cell stack is changed (increase in the length of the fuel cell stack in the unit cell stacking direction).For this reason, it is difficult to apply a completely uniform surface pressure (internal pressure) to the fuel cell stack.

[0018] In particular, since the fastening member in the prior art partially supports a specific location of the end plate, there is a problem that a portion not supported by the fastening member (a portion not in contact with the fastening member) is deformed (bent) when the volume of the fuel cell stack is changed. For this reason, there is a problem that it is difficult to apply a completely uniform surface pressure (internal pressure) to the fuel cell stack, and a load is concentrated at a specific location in the fuel cell stack.

[0019] In contrast, according to an embodiment of the present disclosure, an elastic member is provided between the end of the end plate and the enclosure, whereby an advantageous effect of applying a uniform surface pressure and a uniform fastening force to the fuel cell stack can be achieved.

[0020] Among other things, according to one embodiment of the present disclosure, an elastic member is provided between the end of the end plate and the casing, so that the elastic member can elastically support the outer surface of the end plate when the fuel cell stack is elastically deformed (a length of the fuel cell stack in the unit cell stacking direction increases). Therefore, in one embodiment, it is possible to minimize the local deformation (bending deflection) of the end plate and apply uniform surface pressure and fastening pressure to the fuel cell stack.

[0021] A clamp member of one embodiment may have various structures capable of securing the plurality of unit cells.

[0022] According to an embodiment of the present disclosure, a clamp member may include a clamp body configured to cover the outer surface of the fuel cell stack in the stacking direction of the unit cells, and a clamp hook connected to one end of the clamp body, configured to cover an outer surface of the end plate, and directly constrained by the end plate.

[0023] An enclosure of one embodiment may include various structures that may surround the fuel cell stack.

[0024] According to an embodiment of the present disclosure, an enclosure may include a first housing configured to surround a portion of the fuel cell stack and a second housing configured to surround another portion of the fuel cell stack.

[0025] An elastic member of one embodiment may have various structures capable of being elastically compressible and recoverable (expandable and contractable) between the end of the end plate and the enclosure.

[0026] According to an embodiment of the present disclosure, an elastic member may include: a first support portion provided to be elastically in contact with the casing; a second support portion spaced from the first support portion and provided to be elastically in contact with the end plate; and a connecting portion configured to connect the first support portion and the second support portion.

[0027] An elastic element of one embodiment can be made of various materials depending on the required conditions and design specifications. According to one embodiment of the present disclosure, an elastic element can be made of carbon fiber reinforced plastic (CFRP).

[0028] According to an embodiment of the present disclosure, an elastic element in the form of a continuous ring may be provided along an edge of the end plate.

[0029] According to the above-described embodiment of the present disclosure, the elastic member may be in the form of a continuous ring provided along the edge of the end plate and elastically support the entire edge of the end plate, thereby more effectively suppressing local deformation (bending deflection) of the end plate caused by a change in the volume of the fuel cell stack.

[0030] According to an embodiment of the present disclosure, a fuel cell module may include a reinforcing rib provided on the casing and corresponding to the elastic member.

[0031] As described above, according to one embodiment of the present disclosure, the reinforcing ribs on the cover can be provided to correspond to the elastic member, so that the structural rigidity of the part of the cover in contact with the elastic member can be ensured. Therefore, it is possible to achieve a beneficial effect of minimizing the deformation of the end plate by utilizing an elastic force of the elastic member, and to maintain a more stable arrangement state and elastic support performance of the elastic member.

[0032] According to an embodiment of the present disclosure, a fuel cell module may include a sealing member provided between the elastic member and the end plate.

[0033] As described above, according to one embodiment of the present disclosure, the sealing member can be provided between the elastic member and the end plate. Therefore, it is possible to obtain an advantageous effect of minimizing leakage of a reactant gas and a coolant through the gap between the elastic member and the end plate and minimizing the ingress of foreign matter such as dust.

[0034] According to one embodiment of the present disclosure, a fuel cell module may include a seating groove between the elastic member and the end plate. For example, a seating groove may be provided in a surface of the elastic member facing the end plate. In another example, a seating groove may be provided in a surface of the end plate facing the elastic member.

[0035] According to an embodiment of the present disclosure, a fuel cell module may include a guide groove provided in an outer surface of the clamp hook facing the elastic member to be continuously connected to the seating groove and configured such that the elastic member is seated in the guide groove.

[0036] As described above, according to one embodiment of the present disclosure, the seating groove may be provided between the elastic member and the end plate, and the sealing member may be seated in the seating groove. Therefore, it is possible to achieve an advantageous effect of stably maintaining the arrangement state of the sealing member and stably ensuring the sealing performance.

[0037] According to an embodiment of the present disclosure, a fuel cell module may have vents provided in the enclosure so that air may enter or exit the enclosure depending on a volume change of the fuel cell stack.

[0038] As described above, according to one embodiment of the present disclosure, a vent hole may be provided in the enclosure, so that an effect of cooling the fuel cell stack can be achieved depending on a volume change of the fuel cell stack. Therefore, it is possible to achieve a beneficial effect of improving the operating stability and operating efficiency of the fuel cell stack.

[0039] In particular, according to one embodiment of the present disclosure, a separate cooling fan or the like for supplying air for cooling the fuel cell stack is not necessarily required, since the air can enter or exit the enclosure depending on a volume change of the fuel cell stack. Therefore, it is possible to achieve a beneficial effect of simplifying the structure and improving the space utilization and degree of freedom of design.

[0040] According to an embodiment of the present disclosure, a fuel cell module may include a filter element provided in the enclosure while covering the vent opening and configured to filter the air entering the vent opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other features and advantages of embodiments of the present disclosure can be better understood from the following detailed description when taken in conjunction with the accompanying drawings, in which: Fig. 1 is a view of a fuel cell module according to an embodiment of the present disclosure; Fig. 2 is an exploded perspective view of a fuel cell module according to an embodiment of the present disclosure; Fig. 3 and Fig. 4 views of an elastic member of a fuel cell module according to an embodiment of the present disclosure; Fig. 5 and Fig. 6 are views for explaining states in which the volume of a fuel cell module is reduced according to an embodiment of the present disclosure; Fig. 7 and Fig. 8 are views for explaining states in which the volume of a fuel cell module is increased according to an embodiment of the present disclosure; Fig. 9 to 11 are views for explaining a method of assembling a fuel cell module according to an embodiment of the present disclosure; and Fig. 12 is a view showing a modification example of a seating groove in a fuel cell module according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0042] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] However, the technical spirit of the present disclosure is not necessarily limited to some embodiments described herein, but may be embodied in various different forms. One or more of the components of the embodiments may be optionally combined and substituted for use within the scope of the technical spirit of the present disclosure.

[0044] Furthermore, unless expressly defined and indicated otherwise, the terms used in the embodiments of the present disclosure (including technical and scientific terms) may be interpreted as commonly understood by a person having ordinary skill in the art to which this disclosure relates. The meaning of commonly used terms, such as those defined in dictionaries, may be interpreted taking into account the contextual meaning of the technology in question.

[0045] Furthermore, the terms used in the embodiments of the present disclosure are for the purpose of explaining the embodiments and not necessarily for the purpose of limiting the present disclosure.

[0046] In this specification, unless expressly stated otherwise, a singular form may also include a plural form. The phrase "at least one (or one or more) of A, B, and C" may include one or more of all combinations that can be formed by combining A, B, and C.

[0047] Furthermore, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used to describe components of the embodiments of the present disclosure. These terms may be used merely to distinguish one component from another, and the type, sequence, or order of the components are not necessarily limited by these terms.

[0048] When a component is described as being “connected,” “coupled,” or “attached” to another component, a component may be directly connected, coupled, or attached to another component, or it may be connected, coupled, or attached to another component via another intermediate component.

[0049] Furthermore, the expression "a component is arranged above (on) or below (under) another component" includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are arranged between the two components. The expression "above (on)" or "below (under)" can mean both a downward and an upward direction with respect to a component.

[0050] With reference Fig. 1 to 12, a fuel cell module 10 according to an embodiment of the present disclosure includes a fuel cell stack 110 realized by stacking a plurality of unit cells 112, end plates 114 configured to cover the ends of the fuel cell stack 110 based on a stacking direction of the unit cells 112, clamp members 120 configured to surround the fuel cell stack 110 and support the fuel cell stack 110, a case 130 configured to surround the fuel cell stack 110 and the clamp member 120, and elastic members 140 provided to be elastically compressible between the ends of the end plates 114 and the case 130 in the stacking direction of the unit cells 112, wherein the elastic members 140 are each configured to form a space with a variable volume 140a define,which is provided between the end of the end plate 114 and the enclosure 130 and has a volume that varies depending on a change in the volume of the fuel cell stack 110.,

[0051] For illustration, the fuel cell module 10 according to the present disclosure can be used in various mobility vehicles such as cars, ships, and aircraft. The present disclosure is not limited or restricted by the types and characteristics of objects (mobility vehicles) to which the fuel cell module 10 is mounted.

[0052] Next, an example in which the fuel cell module 10 according to the present embodiment is applied to an air mobility vehicle will be described.

[0053] The fuel cell stack 110 refers to a type of power generation device that generates electric power through a chemical reaction of fuel (for example, hydrogen), and the fuel cell stack 110 may be configured by stacking several dozen or hundreds of unit cells (fuel cells) 112 in series in a reference stacking direction.

[0054] The unit cell 112 may have various structures capable of generating electricity through an oxidation-reduction reaction between fuel (e.g., hydrogen) and an oxidant (e.g., reactant air). The present disclosure is not limited or restricted by the structure of the unit cell 112.

[0055] According to the embodiment of the present disclosure, the unit cell 112 may include a membrane electrode assembly (MEA, not shown) and separators (not shown) stacked on two opposite surfaces of the membrane electrode assembly.

[0056] The membrane electrode assembly (MEA) is configured to generate electricity through an oxidation-reduction reaction between a fuel (e.g., hydrogen), which is a first reactant gas, and an oxidant (e.g., air), which is a second reactant gas.

[0057] The structure and material of the membrane electrode assembly can be changed in various ways depending on the required conditions and design specifications. The present disclosure is not restricted or limited by the structure and material of the membrane electrode assembly.

[0058] The membrane electrode assembly may, for example, comprise an electrolyte membrane through which hydrogen ions move and catalyst electrode layers attached to two opposite sides of the electrolyte membrane. The electrochemical reactions occur in the catalyst electrode layers. Furthermore, gas diffusion layers (GDLs) (not shown) may be attached to two opposite sides of the membrane electrode assembly. The gas diffusion layers serve to evenly distribute the reactant gases and transfer the generated electrical energy.

[0059] The separator not only serves to block air and hydrogen, the reactant gases, but also to define flow paths for the reactant gases and a coolant and to transfer electrical current to an external circuit.

[0060] In addition, the separators may also serve to distribute the heat generated in the unit cell 112 to the entire unit cell 112, and the excess heat generated may be dissipated to the outside by the coolant flowing along the cooling flow paths (not shown) between the separators.

[0061] The separators are configured to supply the first reactant gas (e.g., hydrogen) and the second reactant gas (e.g., air) to the membrane electrode assembly, and are positioned to be in close contact with one and the other surfaces of the membrane electrode assembly in a stacking direction of the unit cells 112.

[0062] For example, the separator (e.g., a first separator) positioned on one surface of the membrane electrode assembly may be an anode separator configured to define a flow path for the fuel (e.g., hydrogen), which is the first reactant gas, or a cathode separator configured to define a flow path for an oxidant (e.g., air), which is the second reactant gas. Further, the separator (e.g., a second separator) positioned on the other surface of the membrane electrode assembly may be the other of the anode separator and the cathode separator.

[0063] For example, the first separator may be in close contact with one surface of the membrane electrode assembly. The first channel (not shown) through which the first reactant gas (e.g., hydrogen) flows may be provided in one surface of the first separator facing the membrane electrode assembly, and a cooling channel (not shown) through which the coolant flows may be provided in the other surface of the first separator.

[0064] The second separator may be in close contact with the other surface of the membrane electrode assembly. The second channel (not shown) through which the second reactant gas (e.g., air) flows may be provided in a surface of the second separator facing the membrane electrode assembly, and a cooling channel (not shown) through which the coolant flows may be provided in the other surface of the second separator.

[0065] Hydrogen as fuel and air as oxidant can be supplied to an anode (not shown) and a cathode (not shown) of the membrane electrode assembly, respectively, through the channels (not shown) in the first separator and the second separator. The hydrogen can be supplied to the anode, and the air can be supplied to the cathode.

[0066] The hydrogen supplied to the anode is split into hydrogen ions (protons) and electrons by catalysts in the electrode layers located on two opposite sides of the electrolyte membrane. Only the hydrogen ions are selectively transferred to the cathode through the electrolyte membrane, which is a cation exchange membrane. At the same time, the electrons are transferred to the cathode through the gas diffusion layer and separator, which are conductors.

[0067] At the cathode, the hydrogen ions supplied through the electrolyte membrane and the electrons transferred through the separator interact with the oxygen in the air supplied to the cathode through an air supply device, generating a reaction that produces water. As a result of the movement of the hydrogen ions, electrons flow through external conductive wires, and the resulting electron flow generates an electric current.

[0068] The end plates 114 may serve to protect the fuel cell stack 110 from external impacts or the like and define the outermost peripheral sides of the fuel cell stack 110.

[0069] The end plate 114 can be made of various materials depending on the required conditions and design specifications. The present disclosure is not limited or restricted by the material of the end plate 114. For example, the end plate 114 can be made of a typical metal material.

[0070] The end plate 114 may have various structures that may cover the outermost peripheral end (outer surface) of the fuel cell stack 110. The present disclosure is not limited or restricted by the structure and shape of the end plate 114.

[0071] For example, the end plate 114 may have a structure corresponding to that of the unit cell 112. The outer surfaces of the unit cells 112 (the outermost peripheral end of the fuel cell stack) may be completely covered by the end plates 114.

[0072] Additionally, a bypass plate (not shown) may be provided between the end plate 114 and the fuel cell stack 110 (the outermost peripheral end of the fuel cell stack) and may serve to relieve the differential pressure between the first reactant gas (e.g., hydrogen) and the second reactant gas (e.g., air) introduced into the fuel cell stack 110.

[0073] The clamp member 120 is configured to ensure the tightness (fixing pressure) of the fuel cell stack 110. The respective unit cells 112 can be in close contact with each other due to the preset fixing pressure applied by the clamp member 120.

[0074] The number and mounting position of the clamp elements 120 may vary depending on the required conditions and design specifications. The present disclosure is not limited or restricted by the number of clamp elements 120 and the mounting position of the clamp element 120.

[0075] The following describes an example in which a total of four clamp elements 120 are attached to the fuel cell stack 110, two clamp elements 120 each for the top and bottom of the fuel cell stack 110.

[0076] The clamp member 120 may have various structures capable of securing the plurality of unit cells 112. The present disclosure is not limited or restricted by the structure of the clamp member 120.

[0077] According to an embodiment of the present disclosure, the clamp member 120 may include a clamp body 122 configured to cover at least a portion of an outer surface of the fuel cell stack 110 in the stacking direction of the unit cells 112, and clamp hooks 124 connected to ends of the clamp body 122 and configured to cover a portion of the outer surfaces of the end plates 114 and to be directly constrained by the end plates 114.

[0078] The clamp body 122 may have various structures capable of covering the outer surface of the fuel cell stack 110 in the stacking direction of the unit cell 112. The present disclosure is not limited or restricted by the structure and shape of the clamp body 122.

[0079] The clamp body 122 may, for example, be designed in the form of a straight band with a length corresponding to the fuel cell stack 110 (ie, a length in the longitudinal direction of the fuel cell stack).

[0080] According to an embodiment of the present disclosure, the bracket body may have a curved shape (e.g., an S-shape or a C-shape) or other shapes.

[0081] The clip hook 124 is connected to the end of the clip body 122 so as to be held (attached) by the end plate 114 while covering at least a portion of the outer surface of the end plate 114.

[0082] For example, the clamp hook 124 may be attached to the end plate 114 using a connecting element, such as a typical fastening screw. According to one embodiment of the present disclosure, the clamp hook may be configured to be independently attached (connected) to the end plate without the use of a separate connecting element, such as a separate fastening screw.

[0083] An example is described below in which the clamp hooks 124 are provided at the two opposite ends of the clamp body 122 and are fastened to the end plates 114 in accordance with the clamp hooks 124. For example, the clamp hooks 124, together with the clamp body 122, may form an approximately U-shaped cross-sectional shape.

[0084] The clamp member 120 can be made of various materials depending on the required conditions and design specifications. The present disclosure is not limited or restricted by the material and properties of the clamp member 120.

[0085] In particular, the clamp element 120 may be made of a material that can elastically deform (expand or contract) depending on a volume change of the fuel cell stack 110.

[0086] The clamp element 120 may be made of, for example, a carbon fiber material. According to an embodiment of the present disclosure, the clamp element may be made of a typical metallic material or other materials.

[0087] The enclosure 130 is configured to at least partially, largely, or completely surround the fuel cell stack 110 to protect the fuel cell stack 110 from external influences or the like.

[0088] The following describes an example in which the enclosure 130 is configured to surround an entire lateral side of the fuel cell stack 110. Alternatively, the enclosure 130 may be configured to surround a portion of the lateral side of the fuel cell stack 110.

[0089] The enclosure 130 may include various structures that may surround the fuel cell stack 110. The present disclosure is not limited or restricted by the structure and shape of the enclosure 130.

[0090] According to an embodiment of the present disclosure, the enclosure 130 may include a first housing 132 configured to include a portion (e.g., the upper portion according to Fig. 2) of the fuel cell stack 110, and a second housing 134 configured to surround another part (for example, the lower portion according to Fig. 2) of the fuel cell stack 110. The first housing 132 and the second housing 134 may together define a receiving space that receives the fuel cell stack 110.

[0091] For example, the first housing 132 and the second housing 134 may collectively define an approximately square box shape.

[0092] Furthermore, the enclosure 130 may be configured to surround part or all of the outer surface of the end plate 114 according to the required conditions and design specifications.

[0093] For example, an approximately central section of any (for example, the left end plate in Fig. 2) of the pair of end plates 114 provided at the two opposite ends of the fuel cell stack 110, except for a peripheral part thereof, are exposed to the outside of the enclosure 130. The other (for example, the right end plate in Fig. 2) the pair of end plates 114 provided at the two opposite ends of the fuel cell stack 110 may be completely covered by the enclosure 130.

[0094] According to one embodiment of the present disclosure, both end plates at the two opposite ends of the fuel cell stack may be exposed to the outside of the enclosure (for example, the left and right end plates are partially exposed to the outside of the enclosure). Alternatively, the two end plates at the two opposite ends of the fuel cell stack may be covered by the enclosure.

[0095] In the embodiment of the present disclosure illustrated and described above, the example in which the enclosure 130 includes two housings was described. However, according to another embodiment of the present disclosure, only a single housing may form the enclosure, or three or more housings may form the enclosure.

[0096] With reference to the Fig. 2 to 8, the elastic member 140 is provided to be elastically compressible between the end of the end plate 114 and the enclosure 130 in the stacking direction of the unit cell 112. The elastic member 140 is configured to define the variable volume space 140a provided between the end of the end plate 114 and the enclosure 130 and having a volume that varies depending on a volume change of the fuel cell stack 110.

[0097] The elastic member 140 may be configured to minimize the local deformation (bending deflection) of the end plate 114 and exert a completely uniform surface pressure and fastening pressure on the fuel cell stack 110 when the fuel cell stack 110 is elastically deformed by a volume change of the stack (for example, when the fuel cell stack 110 is expanded or contracted in the stacking direction of the unit cell).

[0098] For reference, in one embodiment of the present disclosure, the configuration in which the volume of the variable volume space 140a varies depending on a volume change of the fuel cell stack 110 may be defined as a configuration in which a length (or width) of the variable volume space 140a in the unit cell stacking direction varies depending on a volume change of the fuel cell stack 110 (for example, a length change of the fuel cell stack in the unit cell stacking direction).

[0099] According to an embodiment of the present disclosure, the elastic members 140 may be provided at the two opposite ends of the fuel cell stack (for example, at the end of the left end plate and at the end of the right end plate).

[0100] According to one embodiment of the present disclosure, the elastic member may be provided only at one of the two opposite ends of the fuel cell stack (for example, at the end of the left end plate or at the end of the right end plate).

[0101] The elastic member 140 may have various structures capable of being elastically compressible and recoverable (expandable and contractible) between the end of the end plate 114 and the enclosure 130. The present disclosure is not limited or restricted by the structure of the elastic member 140.

[0102] According to an embodiment of the present disclosure, the elastic member 140 may include a first support portion 142 configured to be elastically in contact with the enclosure 130, a second support portion 144 spaced from the first support portion 142 and configured to be elastically in contact with the end plate 114, and a connecting portion 146 configured to connect the first support portion 142 and the second support portion 144.

[0103] For example, the first support portion 142, the second support portion 144, and the connecting portion 146 may together define an approximately “U” shape.

[0104] According to one embodiment of the present disclosure, the first support portion, the second support portion, and the connecting portion may together define an approximately “H” shape or other shapes.

[0105] The elastic member 140 can be made of various materials depending on the required conditions and design specifications. The present disclosure is not limited or restricted by the material and properties of the elastic member 140.

[0106] According to one embodiment of the present disclosure, the elastic element 140 may be made of carbon fiber reinforced plastic (CFRP).

[0107] According to one embodiment of the present disclosure, the elastic element may be made of a typical metallic material (e.g., stainless steel) or other materials.

[0108] In particular, the elastic element 140 may be provided in the form of a continuous ring along an edge of the end plate 114.

[0109] The elastic element 140 may, for example, be provided in the form of an approximately square ring corresponding to the end plate 114.

[0110] In the above-mentioned configuration, when the length of the fuel cell stack 110 increases according to a volume change of the fuel cell stack 110 (the length of the fuel cell stack in the stacking direction of the unit cells increases), the second support portion 144 is elastically moved toward the first support portion 142 by the end plate 114, as shown in Fig. 7, so that the elastic member 140 can be compressed and the outer surface (a surface facing the elastic member) of the end plate 114 can be elastically supported by the elastic member 140.

[0111] The elastic element 140 may, among other things, be provided in the form of a continuous ring along the edge of the end plate 114 and elastically support the entire edge of the end plate 114, thereby suppressing local deformation (bending deflection) of the end plate 114 caused by a volume change of the fuel cell stack 110.

[0112] In contrast, when the length of the fuel cell stack 110 decreases (the length of the fuel cell stack in the stacking direction of the unit cells decreases), corresponding to a volume change of the fuel cell stack 110, the second support portion 144 is moved away from the first support portion 142, as shown in Fig. 5, so that elastic element 140 can be restored and the outer surface (the surface facing the elastic element) of the end plate 114 can be elastically supported by the elastic element 140.

[0113] As described above, according to one embodiment of the present disclosure, the elastic member 140 can be provided between the end of the end plate 114 and the enclosure 130 based on the stacking direction of the unit cells 112, and the end plate 114 can be elastically supported by the elastic member 140 when the length of the fuel cell stack 110 varies depending on a volume change of the fuel cell stack 110, so that local deformation (bending deflection) of the end plate 114 can be minimized. Therefore, it is possible to achieve a beneficial effect by applying completely uniform surface pressure and fastening pressure to the fuel cell stack 110 and improving the creep rupture performance of the fuel cell stack 110.

[0114] With reference to the Fig. 1 and Fig. 2, the fuel cell module 10 according to an embodiment of the present disclosure may include reinforcing ribs 139 provided on the casing 130 and corresponding to the elastic member 140.

[0115] The reinforcing ribs 139 may be configured to ensure the structural rigidity of the portion of the enclosure 130 that is in contact with the elastic member 140.

[0116] For example, the reinforcing ribs 139 may be attached to an outer surface of the enclosure 130 and correspond to the elastic member 140. According to another embodiment of the present disclosure, the reinforcing ribs may be provided on an inner surface of the enclosure.

[0117] The reinforcing rib 139 may have various structures that enhance the structural rigidity of the enclosure 130. The present disclosure is not limited or restricted by the structure and shape of the reinforcing rib 139.

[0118] For example, the reinforcing rib 139 may be provided at an edge portion of one end of the enclosure and may have an approximately "L" shape. A plurality of reinforcing ribs 139 may be provided spaced apart along the edge of the enclosure.

[0119] As described above, according to one embodiment of the present disclosure, the reinforcing ribs 139 can be provided on the cover 130 to correspond to the elastic member 140, so that the structural rigidity of the portion of the cover 130 in contact with the elastic member 140 can be ensured. Therefore, it is possible to achieve a beneficial effect of minimizing the deformation of the end plate 114 by utilizing an elastic force of the elastic member 140 and more stably maintaining an arrangement state and elastic support performance of the elastic member 140.

[0120] With reference to Fig. 5, the fuel cell module 10 according to an embodiment of the present disclosure may include a sealing member 150 provided between the elastic member 140 and the end plate 114.

[0121] The sealing element 150 may be configured to perform sealing, waterproof and dustproof functions together with the elastic element 140.

[0122] The sealing member 150 may have various structures capable of sealing a gap between the elastic member 140 and the end plate 114. The present disclosure is not limited or restricted by the shape and structure of the sealing member 150.

[0123] The sealing element 150 may, for example, have the shape of an approximately square ring and be arranged between the elastic element 140 and the end plate 114.

[0124] The sealing element 150 may be made of an elastic material such as silicone or urethane. The present disclosure is not limited or restricted by the material and properties of the sealing element 150.

[0125] As described above, according to one embodiment of the present disclosure, the sealing member 150 may be provided between the elastic member 140 and the end plate 114. Therefore, it is possible to obtain an advantageous effect of minimizing leakage of a reactant gas and a coolant through the gap between the elastic member 140 and the end plate 114 and minimizing the introduction of foreign matter such as dust.

[0126] According to an embodiment of the present disclosure, the fuel cell module 10 may include a seating groove 148 between the elastic member 140 and the end plate 114.

[0127] For example, the seat groove 148 may be provided in a surface of the elastic element 140 facing the end plate 114, and the sealing element 150 may be inserted into the seat groove 148 (see FIG. Fig. 5).

[0128] In another example with reference to Fig. 12, a seating groove 148' may be provided in a surface of the end plate 114 opposite the elastic member 140, and the sealing member 150 may be seated in the seating groove 148'.

[0129] Furthermore, the fuel cell module 10 according to an embodiment of the present disclosure (see Fig. 12) may have a guide groove 124a provided in an outer surface of the clamp hook 124 facing the elastic member 140, such that the guide groove 124a is continuously connected (in communication with) the seat groove 148'. The seat groove 148' and the guide groove 124a can jointly accommodate the entire elastic member 140.

[0130] As described above, according to one embodiment of the present disclosure, the seating groove 148 and / or 148' is provided between the elastic member 140 and the end plate 114, and the sealing member 150 is seated in the seating groove 148 and / or 148'. Therefore, it is possible to achieve an advantageous effect of stably maintaining the arrangement state of the sealing member 150 and stably ensuring the sealing performance.

[0131] According to an embodiment of the present disclosure, as shown in the Fig. 6 and Fig. 8, the fuel cell module 10 may include vent openings 136 in the enclosure 130 so that air may enter or exit the enclosure 130 depending on a change in volume of the fuel cell stack 110.

[0132] The configuration in which air enters or exits the enclosure 130 through the vent opening 136 may include both a configuration in which outside air is introduced into the gap between the fuel cell stack 110 and the enclosure 130 through the vent opening 136 and a configuration in which air stagnating in the gap between the fuel cell stack 110 and the enclosure 130 is discharged to the outside of the enclosure 130 through the vent opening 136.

[0133] The vent opening 136 may have various structures through which air can be introduced or discharged. The present disclosure is not limited or restricted by the structure and shape of the vent opening 136.

[0134] The vent opening 136 may, for example, be provided in the form of a straight slot provided along a side edge of the enclosure 130.

[0135] According to other embodiments of the present disclosure, the vent opening may have a circular shape or other shapes.

[0136] In the configuration described above, when the volume of the fuel cell stack 110 decreases (a decrease in the length of the fuel cell stack in the stacking direction of the unit cells), outside air having a low temperature can be introduced (sucked) into the gap between the fuel cell stack 110 and the enclosure 130 through the vent hole 136, as shown in Fig. 8 shown.

[0137] In contrast, as in Fig. 6, when the volume of the fuel cell stack 110 increases (the length of the fuel cell stack in the stacking direction of the unit cells increases), the hot air in the enclosure 130 (the air stagnating in the gap between the fuel cell stack and the enclosure) is discharged to the outside of the enclosure 130 through the vent hole 136.

[0138] As described above, according to an embodiment of the present disclosure, the vent hole 136 may be provided in the enclosure 130 so that an effect of cooling the fuel cell stack 110 can be provided depending on a volume change of the fuel cell stack 110. Therefore, it is possible to achieve a beneficial effect of improving the operating stability and operating efficiency of the fuel cell stack 110.

[0139] In particular, according to an embodiment of the present disclosure, a separate cooling fan or the like for supplying air for cooling the fuel cell stack 110 is not necessarily provided, since air can enter or exit the enclosure 130 depending on a volume change of the fuel cell stack 110. Therefore, it is possible to achieve an advantageous effect of simplifying the structure and improving space utilization and design freedom.

[0140] According to an embodiment of the present disclosure, the fuel cell module 10 may include a filter element 138 provided in the enclosure 130 to cover the vent opening 136 and configured to filter the air introduced into the vent opening 136.

[0141] The filter element 138 may be configured to filter air supplied (introduced) into the enclosure 130 through the vent opening 136.

[0142] The configuration in which the air to be supplied into the enclosure 130 is filtered may be a configuration in which foreign matter such as dust contained in the air is filtered out by the filter element 138.

[0143] A typical dry filter or a typical paper filter (e.g., an air filter) can be used as the filter element 138. The present disclosure is not limited by the material and type of the filter element 138.

[0144] The filter element 138 may, for example, be provided in the shape of an approximately square block and may be provided on the inner surface of the enclosure 130 to cover the vent opening 136. According to another embodiment of the present disclosure, the filter element may be provided on the outer surface of the enclosure.

[0145] However, the fuel cell module 10 according to an embodiment of the present disclosure can be assembled in various ways according to the required conditions and design specifications. The present disclosure is not limited or restricted by the method and order of assembling the fuel cell module 10.

[0146] With reference to Fig. 9, for example, an end plate 114 may be positioned at one end of a fuel cell stack 110 having a plurality of unit cells 112, and then a clamp member 120 may be attached to the end plate 114.

[0147] Next, as in Fig. 10, the elastic elements 140 are positioned at the two opposite ends of the end plates 114.

[0148] Afterwards, as in Fig. 11, the enclosure 130 may be mounted to surround the fuel cell stack 110 and the clamp member 120 so that the fuel cell module 10 may be manufactured.

[0149] As described above, according to an embodiment of the present disclosure, it is possible to achieve an advantageous effect of minimizing deformation and damage of the fuel cell stack and improving safety and reliability.

[0150] In particular, according to an embodiment of the present disclosure, it is possible to achieve the advantageous effect of applying a completely uniform surface pressure and fastening force to the fuel cell stack.

[0151] Among other things, according to an embodiment of the present disclosure, it is possible to achieve the advantageous effect that, when the volume of the fuel cell stack changes, the fuel cell stack is subjected to completely uniform surface pressure and fastening pressure.

[0152] Furthermore, according to an embodiment of the present disclosure, it is possible to achieve the advantageous effect of improved sealing, waterproofing, and dustproofing while ensuring the creep performance of the fuel cell stack.

[0153] Furthermore, according to an embodiment of the present disclosure, it is possible to achieve an advantageous effect of improving the performance of cooling the fuel cell stack.

[0154] The embodiments described above are for illustrative purposes only and are not intended to limit the present disclosure. Those skilled in the art will appreciate that various modifications and applications not described above can be made to the present embodiment without departing from the essential features of the present embodiment. For example, the respective components specifically described in the embodiments can be modified and then implemented. Furthermore, it can be understood that differences in modifications and applications can be encompassed within the scope of the present disclosure as defined by the appended claims. List of reference symbols 10 fuel cell module 110 fuel cell stacks 112 unit cell 114 End plate 120 clamp element 122 clamp bodies 124 clamp hooks 130 wrapping 132 first housing 134 second housing 136 vent opening 138 filter element 139 Reinforcing rib 140 elastic element 140a Room with variable volume 142 first support section 144 second support section 146 connecting section 148, 148' seat groove 150 sealing element

Claims

[1] Fuel cell module, comprising: a fuel cell stack comprising a stack of unit cells, an end plate configured to cover one end of the fuel cell stack based on a stacking direction of the unit cells; a bracket member configured to extend along the stacking direction of the fuel cell stack and support the fuel cell stack; an enclosure configured to surround the fuel cell stack and the clamp member; and an elastic member configured to be elastically compressible between the end plate and the enclosure based on the stacking direction of the unit cells, wherein the elastic member is configured to define a variable volume space between the end plate and the enclosure such that the variable volume varies depending on a volume change of the fuel cell stack. [2] The module of claim 1, wherein the elastic member comprises a continuous ring located along a circumference of the end plate. [3] Module according to claim 1, wherein the elastic element comprises: a first support portion provided to be elastically in contact with the casing; a second support portion spaced from the first support portion and provided to be elastically in contact with the end plate; and a connecting portion configured to connect the first support portion and the second support portion. [4] The module of claim 1, further comprising a sealing member located between the elastic member and the end plate. [5] The module of claim 4, further comprising a seating groove located between the elastic member and the end plate such that the sealing member is seated in the seating groove. [6] Module according to claim 5, wherein the seating groove is provided in a surface of the elastic element facing the end plate. [7] A module according to claim 5, wherein the seating groove is provided in a surface of the end plate facing the elastic element, wherein the seating groove is provided in a surface of the end plate facing the elastic element. [8] The module of claim 1, wherein the enclosure comprises: a first housing configured to surround a first portion of the fuel cell stack; and a second housing configured to surround a second portion of the fuel cell stack. [9] The module of claim 1 further comprising a vent provided in the enclosure, the vent configured to allow air to enter or exit the enclosure in response to a change in volume of the fuel cell stack. [10] The module of claim 9, further comprising a filter element provided to cover the vent opening and configured to filter the air entering the vent opening. [11] The module according to claim 1, further comprising a reinforcing rib provided on the casing and corresponding to the elastic member. [12] Module according to claim 7, wherein the clamp element comprises: a clamp body configured to extend along an outer surface of the fuel cell stack in the stacking direction of the unit cells; and a staple hook coupled to one end of the staple body and configured to cover at least a portion of an outer surface of the end plate. [13] The module according to claim 12, further comprising a guide groove provided in an outer surface of the clip hook such that the guide groove faces the elastic member, is continuously connected to the seating groove, and is configured such that the elastic member is seated in the guide groove. [14] Module according to claim 1, wherein the elastic element comprises carbon fiber reinforced plastic (CFRP). [15] Fuel cell module, comprising: a fuel cell stack comprising a stack of unit cells; an end plate coupled to one end of the fuel cell stack based on a stacking direction of the unit cells; a bracket member configured to extend along the stacking direction of the fuel cell stack and support the fuel cell stack; an enclosure structure configured to receive the fuel cell stack and the clamp member; and an elastic member configured to be elastically compressible between the end plate and the enclosure structure based on the stacking direction of the unit cells, the elastic member configured to define a variable volume space between the end plate and the enclosure structure such that the variable volume varies depending on a volume change of the fuel cell stack, the elastic member comprising: a first support section intended for coupling to the casing, a second support portion spaced from the first support portion and provided for coupling to the end plate, and a connecting portion configured to couple the first support portion and the second support portion. [16] The module of claim 15, further comprising: a sealing element located between the elastic element and the end plate; a vent opening provided in the enclosure, the vent opening being configured such that air enters or exits the enclosure depending on a volume change of the fuel cell stack; and a filter element provided to cover the vent opening and configured to filter the air entering through the vent opening. [17] Fuel cell module, comprising: a fuel cell stack comprising a stack of unit cells; an end plate coupled to one end of the fuel cell stack based on a stacking direction of the unit cells; a clamp member configured to extend along the stacking direction of the fuel cell stack and support the fuel cell stack, the clamp member comprising: a clamp body configured to extend along an outer surface of the fuel cell stack in the stacking direction of the unit cells, and a staple hook coupled to one end of the staple body and configured to cover at least a portion of an outer surface of the end plate; an enclosure structure configured to receive the fuel cell stack and the clamp member, the enclosure structure comprising: a first housing configured to cover a first portion of the fuel cell stack, and a second housing configured to cover a second portion of the fuel cell stack; an elastic member configured to be elastically compressible between the end plate and the enclosure, the elastic member being configured to define a variable volume space between the end plate and the enclosure such that the variable volume varies along the stacking direction depending on a volume change of the fuel cell stack, the elastic member comprising: a first support portion coupled to the enclosure; a second support portion spaced from the first support portion and coupled to the end plate, and a connecting portion configured to couple the first support portion and the second support portion; a sealing element located between the elastic element and the end plate; a vent opening provided in the enclosure, the vent opening being configured such that air enters or exits the enclosure depending on a change in volume of the fuel cell stack; a filter element provided to cover the vent opening and configured to filter the air entering through the vent opening; and a seating groove located between the elastic element and the end plate so that the sealing element sits in the seating groove. [18] The module of claim 17, wherein the elastic member comprises a continuous ring located along an edge of the end plate. [19] A module according to claim 17, wherein the seating groove is provided in a surface of the elastic element facing the end plate. [20] The module according to claim 17, wherein the seating groove is provided in a surface of the end plate facing the elastic member, and wherein the clip hook has a guide groove formed in an outer surface of the clip hook such that the guide groove faces the elastic member to be continuously connected to the seating groove and is configured such that the elastic member and / or the sealing member are seated in the guide groove.

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