Proton exchange membrane fuel cell monomer and sealing device thereof

Abstract

The present invention provides a PEM fuel cell monomer, which includes a cathode plate, a membrane electrode assembly, an anode plate and an anode seal, wherein the membrane electrode assembly is arranged between the cathode plate and the anode plate, and the anode seal is arranged between the membrane electrode assembly and the anode plate, wherein the anode plate forms at least one first through hole and at least one fuel diffusion channel, the cathode plate forms at least one second through hole, and the anode seal forms at least one anode through hole, wherein the first through hole of the anode plate is arranged to be connected to the fuel diffusion channel of the anode plate, and the anode through hole of the anode seal is arranged to be connected to the second through hole of the cathode plate and the first through hole of the anode plate respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and more particularly to a sealing device for proton exchange membrane fuel cells. Background Art

[0002] A fuel cell is an energy conversion device that converts the chemical energy in a fuel into electrical energy in the form of a redox reaction. There are many types of fuel cells, such as hydrogen fuel cells, methanol fuel cells, etc. A hydrogen fuel cell is a fuel cell that can use hydrogen as fuel and convert the chemical energy of hydrogen into electrical energy through an electrochemical reaction. The product of its electrochemical reaction is water, and the entire reaction process will not pollute the environment. The most representative of hydrogen fuel cells is the proton exchange membrane (PEM) fuel cell. Generally, a hydrogen fuel cell includes a plurality of PEM fuel cell monomers, each of which includes at least an anode plate, a cathode plate, and a membrane electrode assembly (MEA) disposed between the anode plate and the cathode plate. Multiple fuel cell monomers are stacked to form a fuel cell unit. In a fuel cell, before the electrochemical reaction, an oxidant, such as oxygen, and a fuel, such as hydrogen, need to be separated to avoid direct contact. In addition, in order to ensure the efficiency and performance of the electrochemical reaction, the oxygen supply passage and / or the hydrogen supply passage must be airtight to prevent hydrogen and oxygen from leaking out.

[0003] Attached pictures Figure 1A Shown is an existing PEM fuel cell and its sealing device. The fuel cell (or fuel cell stack) includes a plurality of fuel cell monomers stacked together, wherein each fuel cell monomer includes a cathode plate 1P, a membrane electrode assembly 3P, an anode plate 5P, a cathode seal 2P, an anode seal 4P, and a sealing ring 6P disposed between the anode plate 5P of one fuel cell monomer and the cathode plate 1P of the other fuel cell monomer of two adjacent fuel cell monomers. In particular, in the fuel cell monomer of the fuel cell, the anode seal 4P is disposed on the anode side of the membrane electrode assembly 3P to prevent hydrogen from leaking on the anode side of the membrane electrode assembly 3P, the cathode seal 2P is disposed on the cathode side of the membrane electrode assembly 3P to prevent hydrogen from leaking on the cathode side of the membrane electrode assembly 3P, and the sealing ring 4P is disposed to prevent hydrogen from leaking and cross-flowing with oxygen (or air). Those skilled in the art will appreciate that Figure 1AThe sealing between the anode and cathode plates of the conventional fuel cell shown is achieved by the pressure between the anode and cathode plates. However, the connection between the hydrogen supply channel and the fuel channel of the anode plate 5P is a convex-concave structure 7P formed by multiple grooves. Therefore, the contact between the anode plate 5P and the anode seal 4P and the support for the anode seal 4P are discontinuous. When the pressure between the anode and cathode plates of the fuel cell monomer is too large, the anode seal 4P may be deformed and squeezed into the groove at the connection, affecting the flow and supply of fuel. In addition, the uneven force on the anode seal 4P will also affect the sealing of the anode side of the membrane electrode assembly 3P.

[0004] Attached pictures Figure 1B The fuel cell shown is for Figure 1A An improvement of the fuel cell shown, wherein the fuel cell further includes a support sheet (or support plate) 8P, wherein the support sheet 8P is arranged between the anode seal 4P and the anode plate 5P, wherein the support sheet 8P is arranged opposite to the convex-concave structure 7P of the anode plate 5P to prevent the anode seal 4P from deforming and affecting the fuel supply. However, in order to meet the sealing requirements, the thickness of the support sheet 8P must be small enough, and the rigidity of the support sheet 8P must be large enough. In addition, in the assembly of the fuel cell, the support sheet 8P also needs to be accurately positioned. In practical applications, the support sheet 8P itself will cause the manufacturing process of the fuel cell to be more complicated and the manufacturing cost to rise, and the effect is not ideal. Summary of the invention

[0005] The main purpose of the present invention is to provide a PEM fuel cell monomer, wherein the sealing device of the PEM fuel cell monomer is suitable for being arranged between the anode plate and the cathode plate of the fuel cell, and the sealing device is evenly stressed, thereby being able to better prevent the fuel in the fuel cell from leaking.

[0006] Another object of the present invention is to provide a PEM fuel cell monomer, wherein the sealing device of the PEM fuel cell monomer is arranged between the positive and negative plates of the fuel cell to prevent leakage of fuel, such as hydrogen, and prevent cross-flow between fuel and oxidant, such as oxygen (or air).

[0007] Another object of the present invention is to provide a PEM fuel cell monomer, wherein the sealing device of the PEM fuel cell monomer enables the fuel cell to have better air tightness and be able to withstand higher working pressure, thereby enabling the fuel cell to provide greater output power.

[0008] Another object of the present invention is to provide a PEM fuel cell unit, wherein the sealing device of the PEM fuel cell unit is provided with two flat sealing surfaces capable of evenly bearing force.

[0009] Another object of the present invention is to provide a PEM fuel cell monomer, wherein the contact surface between the anode seal of the sealing device of the PEM fuel cell monomer and the anode plate of the PEM fuel cell is evenly stressed to avoid deformation of part of the structure of the anode seal due to uneven stress and affect fuel circulation.

[0010] Another object of the present invention is to provide a PEM fuel cell monomer, wherein the sealing device of the PEM fuel cell monomer does not require precise components and complex structures, and the manufacturing process is simple and the cost is low.

[0011] Another object of the present invention is to provide a sealing device for a PEM fuel cell, wherein the sealing device is suitable for being arranged between the anode plate and the cathode plate of the fuel cell, and the sealing device is subjected to uniform force, thereby being able to better prevent leakage of fuel in the fuel cell.

[0012] Other advantages and features of the present invention will become more apparent from the following detailed description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

[0013] According to one aspect of the present invention, a PEM fuel cell monomer of the present invention that can achieve the aforementioned objects and other objects and advantages comprises:

[0014] a cathode plate;

[0015] a membrane electrode assembly;

[0016] an anode plate; and

[0017] An anode seal, wherein the membrane electrode assembly is arranged between the cathode plate and the anode plate, and the anode seal is arranged between the membrane electrode assembly and the anode plate, wherein the anode plate forms at least one first through hole and at least one fuel diffusion channel, the cathode plate forms at least one second through hole, and the anode seal forms at least one anode through hole, wherein the first through hole of the anode plate is arranged to be connected to the fuel diffusion channel of the anode plate, and the anode through hole of the anode seal is arranged to be connected to the second through hole of the cathode plate and the first through hole of the anode plate respectively, so that the anode through hole of the anode seal, the second through hole of the cathode plate and the first through hole of the anode plate can form a fuel flow channel for supplying fuel to the fuel diffusion channel of the anode plate.

[0018] According to another aspect of the present invention, the present invention further provides a PEM fuel cell monomer, comprising:

[0019] a cathode plate;

[0020] a membrane electrode assembly;

[0021] an anode plate; and

[0022] An anode seal, wherein the membrane electrode assembly is arranged between the cathode plate and the anode plate, and the anode seal is arranged between the membrane electrode assembly and the anode plate, wherein the cathode plate forms at least one second through hole, the anode plate forms at least one first through hole, at least one first conductive through hole and at least one fuel diffusion channel, and the anode seal forms at least one anode through hole and a first cavity, wherein the first conductive through hole of the anode plate is connected to the fuel diffusion channel, and the anode through hole of the anode seal is configured to be able to be connected to the second through hole of the cathode plate and the first through hole of the anode plate respectively, so that the second through hole of the cathode plate, the anode through hole of the anode seal and the first through hole of the anode plate can form a fuel flow channel for supplying fuel to the fuel diffusion channel of the anode plate.

[0023] According to another aspect of the present invention, the present invention further provides a sealing device for a PEM fuel cell monomer, comprising:

[0024] an anode seal; and

[0025] A cathode seal, wherein the anode seal forms at least one anode through hole and a first cavity, and the cathode seal forms a cathode through hole and a second cavity, wherein the cathode through hole of the cathode seal is arranged opposite to the anode through hole of the anode seal, and the second cavity is arranged opposite to the first cavity of the anode seal, wherein the anode through hole and the first cavity are arranged separately, and the cathode through hole and the second cavity are arranged separately.

[0026] According to another aspect of the present invention, the present invention further provides an anode plate for a PEM fuel cell, comprising:

[0027] an anode plate body; and

[0028] a sealing edge extending outwardly from the anode plate body, wherein the anode plate body includes a fuel diffusion portion and at least one conduction portion extending outwardly from the fuel diffusion portion, wherein the anode plate has a first through hole, a conduction channel and at least one fuel diffusion channel, wherein the first through hole and the conduction channel of the anode plate are formed in the conduction portion of the anode plate body, and the fuel diffusion channel is formed in the fuel diffusion portion.

[0029] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0030] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A Shown is a conventional fuel cell monomer.

[0032] Figure 1B Shown is another existing fuel cell cell.

[0033] Figure 2A is a perspective view of a fuel cell monomer according to a first preferred embodiment of the present invention.

[0034] Figure 2B It is a partial enlarged view of the fuel cell monomer according to the first preferred embodiment of the present invention.

[0035] Figure 2C 1 is an assembly diagram of a fuel cell monomer according to the first preferred embodiment of the present invention.

[0036] Figure 2D Schematic diagram of the structure of the fuel cell monomer according to the first preferred embodiment of the present invention.

[0037] Figure 2E 1 is a cross-sectional view of a cathode plate of a fuel cell unit according to the first preferred embodiment of the present invention, wherein the cathode plate of the fuel cell unit is stacked with an anode plate of an adjacent fuel cell unit.

[0038] Figure 3 1 is a perspective view of the cathode plate of the fuel cell unit according to the first preferred embodiment of the present invention.

[0039] Figure 4 1 is a perspective view of the cathode seal of the fuel cell unit according to the first preferred embodiment of the present invention.

[0040] Figure 5 1 is a perspective view of a membrane electrode assembly of a fuel cell monomer according to the first preferred embodiment of the present invention.

[0041] Figure 6 1 is a perspective view of the anode seal of the fuel cell unit according to the first preferred embodiment of the present invention.

[0042] Fig. 7A 1 is a perspective view of an anode plate of a fuel cell unit according to the first preferred embodiment of the present invention.

[0043] Figure 7B 1 is a bottom view of the anode plate of the fuel cell unit according to the first preferred embodiment of the present invention.

[0044] Figure 7C is another cross-sectional view of the anode plate of the fuel cell unit according to the first preferred embodiment of the present invention.

[0045] Figure 8Shown is an alternative implementation of the membrane electrode assembly of the fuel cell monomer according to the first preferred embodiment of the present invention.

[0046] Fig. 9A is a perspective view of a fuel cell monomer according to a second preferred embodiment of the present invention.

[0047] Fig. 9B It is a partial enlarged view of the fuel cell monomer according to the second preferred embodiment of the present invention.

[0048] Fig. 9C 1 is an assembly diagram of a fuel cell monomer according to the second preferred embodiment of the present invention.

[0049] Fig.9D Schematic diagram of the structure of the fuel cell monomer according to the second preferred embodiment of the present invention.

[0050] Fig.10 1 is a perspective view of a cathode plate of a fuel cell unit according to a second preferred embodiment of the present invention.

[0051] Fig.11 1 is a perspective view of a cathode seal of a fuel cell unit according to a second preferred embodiment of the present invention.

[0052] Fig.12 1 is a perspective view of a membrane electrode assembly of a fuel cell monomer according to a second preferred embodiment of the present invention.

[0053] Fig.13 1 is a perspective view of an anode seal of a fuel cell unit according to a second preferred embodiment of the present invention.

[0054] Fig.14 1 is a perspective view of an anode plate of a fuel cell unit according to a second preferred embodiment of the present invention.

[0055] Fig.15A and Fig. 15B Shown is an alternative implementation of the cathode plate of the fuel cell unit according to the second preferred embodiment of the present invention. DETAILED DESCRIPTION

[0056] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0057] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0058] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0059] Referring to the accompanying drawings of the present invention FIG. 2A to FIG. 7CAccording to a first preferred embodiment of the present invention, a PEM fuel cell monomer 10 is illustrated, wherein the PEM fuel cell monomer 10 can be stacked and used to form a PEM fuel cell stack, wherein the PEM fuel cell monomer 10 of the present invention includes a cathode plate 11, an anode plate 12, a membrane electrode assembly 13 and an anode seal 14, wherein the membrane electrode assembly 13 is arranged between the anode plate 12 and the cathode plate 11, and the anode seal 14 is arranged between the membrane electrode assembly 13 and the anode plate 12, wherein the anode plate 12 forms at least one first through hole 1201 and at least one fuel diffusion channel 1202, and the cathode plate 11 forms at least one second through hole 1201 and at least one fuel diffusion channel 1202. The anode seal 14 forms at least one anode through hole 1401, wherein the first through hole 1201 is arranged to communicate with the fuel diffusion channel 1202 of the anode plate 12, wherein the anode through hole 1401 of the anode seal 14 is arranged to be able to communicate with the second through hole 1101 of the cathode plate 11 and the first through hole 1201 of the anode plate 12, respectively, so that the anode through hole 1401 of the anode seal 14, the second through hole 1101 of the cathode plate 11 and the first through hole 1201 of the anode plate 12 can form a fuel flow channel 101 for supplying fuel to the fuel diffusion channel 1202 of the anode plate 12. It can be understood that the fuel flow channel 101 of the PEM fuel cell monomer 10 of the present invention is connected with the fuel diffusion channel 1202 so that hydrogen can be provided (or supplied) through the fuel flow channel 101. Preferably, the anode seal 14 is disposed between the membrane electrode assembly 13 and the anode plate 12 to ensure airtightness between the membrane electrode assembly 13 and the anode plate 12. Accordingly, the anode seal 14 of the PEM fuel cell monomer 10 of the present invention is disposed between the anode plate 12 and the membrane electrode assembly 13 to form a seal (structure) to prevent leakage of fuel, such as hydrogen. FIG. 2A to FIG. 7C As shown, more preferably, the cathode plate 11 forms two second through holes 1101, the anode plate 12 forms two first through holes 1201 and at least one fuel diffusion channel 1202, and the anode seal 14 forms two anode through holes 1401, wherein the second through holes 1101 of the cathode plate 11 are respectively arranged at both ends of the cathode plate 11, and the first through holes 1201 of the anode plate 12 are respectively arranged at both ends of the anode plate 12, and the first through holes 1201 are respectively connected to the fuel diffusion channel 1202. The anode through hole 1401 of the anode seal 14 is respectively arranged at both ends of the anode seal 14, and the anode through hole 1401 of the anode seal 14, the second through hole 1101 of the cathode plate 11 and the first through hole 1201 of the anode plate 12 form two fuel flow channels 101 respectively connected to the fuel diffusion channel 1202 of the anode plate 12, so that hydrogen can be provided (or supplied) through the fuel flow channels 101.

[0060] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the cathode plate 11 of the PEM fuel cell unit 10 according to the first preferred embodiment of the present invention has a first side 111 facing the membrane electrode assembly 13 and a second side 112 facing opposite to the first side 111, and the anode plate 12 has a channel side 123 facing the membrane electrode assembly 13 and a back side 124 facing opposite to the channel side 123. In other words, the membrane electrode assembly 13 of the PEM fuel cell unit 10 is arranged to face the channel side 123 of the anode plate 12 and the first side 111 of the cathode plate 11, respectively.

[0061] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the anode plate 12 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention includes an anode plate body 121 and a sealing edge 122 extending outward from the anode plate body 121, and the anode seal 14 includes a first sealing portion 141, wherein the first sealing portion 141 of the anode seal 14 is disposed between the sealing edge 122 of the anode plate 12 and the membrane electrode assembly 13. As shown in the accompanying drawings FIG. 2A to FIG. 7C As shown, preferably, the first sealing portion 141 of the anode seal 14 has a continuous annular structure, so as to form a continuous sealing mechanism between the sealing edge 122 of the anode plate 12 and the membrane electrode assembly 13 to ensure that hydrogen will not leak between the anode plate 12 and the membrane electrode assembly 13. More preferably, the sealing edge 122 of the anode plate 12 forms a flat and continuous sealing surface 1220 to ensure that the first sealing portion 141 forms a good seal between the anode plate 12 and the membrane electrode assembly 13.

[0062] As shown in the attached picture FIG. 2A to FIG. 7C As shown, according to the first preferred embodiment of the present invention, the anode plate body 121 of the anode plate 12 of the PEM fuel cell monomer 10 forms at least one conductive channel 1203, wherein the conductive channel 1203 is respectively connected to the first through hole 1201 and the fuel diffusion channel 1202 of the anode plate 12, so that the hydrogen flowing through the fuel flow channel 101 can be provided through the conductive channel 1203 and the fuel diffusion channel 1202 of the anode plate 12.

[0063] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, according to the first preferred embodiment of the present invention, the anode plate body 121 of the anode plate 12 of the PEM fuel cell monomer 10 includes a fuel diffusion portion 1211 and at least one conductive portion 1212 extending outward from the fuel diffusion portion 1211, and the anode seal 14 further includes at least one second sealing portion 142 extending inward from the first sealing portion 141, wherein the first through hole 1201 and the conductive channel 1203 of the anode plate 12 are formed in the conductive portion 1212 of the anode plate body 121, the fuel diffusion channel 1202 is formed in the fuel diffusion portion 1211, and the anode through hole 1401 of the anode seal 14 is formed in the second sealing portion 142. Preferably, the anode plate body 121 includes a fuel diffusion portion 1211 and two conductive portions 1212 extending outward from the fuel diffusion portion 1211, respectively, and the anode seal 14 includes the first sealing portion 141 and two second sealing portions 142 extending inward from the first sealing portion 141, respectively, wherein the conductive portions 1212 of the anode plate body 121 are arranged to correspond to the second sealing portions 142 of the anode seal 14, respectively.

[0064] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the anode seal 14 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention further has a first cavity 1402, wherein the first cavity 1402 is formed in the first sealing portion 141 of the anode seal 14, and the anode through hole 1401 of the anode seal 14 and the first cavity 1402 are formed separately in the anode seal 14. In other words, there is a gap 1421 between the anode through hole 1401 and the first cavity 1402 of the anode seal 14, so that the anode seal 14 can perform partition sealing between the anode plate 12 and the membrane electrode assembly 13 directly at the anode through hole 1401 and the first cavity 1402, thereby improving the sealing performance between the anode plate 12 and the membrane electrode assembly 13. Preferably, the first cavity 1402 of the anode seal 14 is arranged to face the fuel diffusion channel 1202 of the anode plate 12, so that a fuel diffusion space 102 facing the fuel diffusion channel 1202 of the anode plate 12 is formed between the membrane electrode assembly 13 and the anode plate 12, wherein the fuel diffusion space 102 can be used to accommodate fuel, such as hydrogen. More preferably, the anode seal 14 is made of a flexible sealing material. Accordingly, when the anode seal 14 is arranged to have an appropriate thickness, a good seal can be formed between the anode plate 12 and the membrane electrode assembly 13 to prevent hydrogen from leaking between the anode plate 12 and the membrane electrode assembly 13. Most preferably, the first through hole 1201 of the anode plate 12 is arranged at the first end 1213 of the conductive portion 1212, and the conductive channel 1203 of the anode plate 12 is arranged to extend from the first through hole 1201 to the second end 1214 of the conductive portion 1212, and extend from the second end 1214 to the fuel diffusion channel 1202 of the anode plate 12, so that the first end 1213 and the second end 1214 of the conductive portion 1212 of the anode plate 12 are both distributed with channels (the first through hole 1201 or the conductive channel 1203).

[0065] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention further includes at least one cathode seal 15, wherein the cathode seal 15 is disposed between the cathode plate 11 and the membrane electrode assembly 13 to form a seal between the cathode plate 11 and the membrane electrode assembly 13 and prevent hydrogen from leaking between the cathode plate 11 and the membrane electrode assembly 13. FIG. 2A to FIG. 7CAs shown, further, the cathode seal 15 forms a cathode through hole 1501, and the cathode through hole 1501 of the cathode seal 15 is configured to be connected with the second through hole 1101 of the cathode plate 11 and the anode through hole 1401 of the anode seal 14, respectively, so that the second through hole 1101 of the cathode plate 11, the cathode through hole 1501 of the cathode seal 15, the anode through hole 1401 of the anode seal 14 and the first through hole 1201 of the anode plate 12 can form a fuel flow channel 101 for providing fuel to the fuel diffusion channel 1202 of the anode plate 12.

[0066] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the cathode seal 15 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention includes a cathode seal ring 151 and at least one cathode seal portion 152 extending from the cathode seal ring 151, wherein the cathode seal ring 151 of the cathode seal 15 forms a second cavity 1502. FIG. 2A to FIG. 7C As shown, preferably, the second cavity 1502 of the cathode seal 15 is arranged to face the first cavity 1402 of the anode seal 14, wherein the shape and size of the second cavity 1502 of the cathode seal 15 are formed according to the first cavity 1402 of the anode seal 14, so that the second cavity 1502 of the cathode seal 15 can face the first cavity 1402 of the anode seal 14, thereby preventing the cathode seal 15 from deforming and pressing the membrane electrode assembly 13 when the cathode seal 15 is arranged between the cathode plate 11 and the membrane electrode assembly 13 and is squeezed, so that the cathode seal 15 is attached to the membrane electrode assembly 13 and the electrochemical reaction area of ​​the cathode plate 11 becomes smaller. More preferably, the second cavity 1502 of the cathode seal 15 is arranged on the cathode seal 15 separated from the cathode through hole 1501. In other words, there is a sealing structure between the cathode through hole 1501 of the cathode seal 15 and the second cavity 1502 to enhance the airtightness between the cathode plate 11 and the membrane electrode assembly 13. Accordingly, the cathode seal 15 is preferably made of a flexible sealing material, and when the cathode seal 15 has an appropriate thickness, a good seal can be formed between the cathode plate 11 and the membrane electrode assembly 13 to prevent hydrogen from leaking between the cathode plate 11 and the membrane electrode assembly 13. Preferably, the cathode seal 15 includes a cathode sealing ring 151 and two cathode sealing portions 152 extending from the cathode sealing ring 151, wherein the cathode sealing ring 151 of the cathode seal 15 is arranged opposite to the first sealing portion 141 of the anode seal 14, and the cathode sealing portions 152 are arranged opposite to the second sealing portions 142, respectively.

[0067] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the PEM fuel cell unit 10 according to the first preferred embodiment of the present invention further includes a sealing gasket 16, and the cathode plate 11 further has a sealing groove 1102, wherein the sealing groove 1102 is arranged on the second side 112 of the cathode plate 11, wherein the sealing groove 1102 is arranged to surround the second through hole 1101 of the cathode plate 11, and the sealing gasket 16 is arranged in the sealing groove 1102, so that the second side 112 of the cathode plate 11 and the anode plate 12' of another PEM fuel cell unit 10' are sealed by the sealing gasket 16 and prevent the fuel from leaking from the second side 112 of the cathode plate 11 and the anode plate 12' of another PEM fuel cell unit 10'. In other words, the sealing gasket 16 forms a seal between the second side 112 of the cathode plate 11 and the anode plate 12' of another PEM fuel cell unit 10'. It can be understood that the sealing gasket 16 is made of a sealing material, such as rubber, and the sealing gasket 16 has an appropriate thickness. Those skilled in the art will appreciate that the thickness of the sealing gasket 16 should be slightly greater than the depth of the sealing groove 1102 .

[0068] As shown in the attached picture FIG. 2A to FIG. 7C As shown, according to the first preferred embodiment of the present invention, the PEM fuel cell monomer 10 realizes sealing between the cathode plate 11 and the membrane electrode assembly 13 of the PEM fuel cell monomer 10 through the cathode seal 15, realizes sealing between the anode plate 12 and the membrane electrode assembly 13 through the anode seal 14, and realizes sealing between the cathode plate 11 of the PEM fuel cell monomer 10 and the anode plate 12' of another adjacent PEM fuel cell monomer 10' through the sealing gasket 16 (and the sealing groove 1102 of the corresponding cathode plate 11).

[0069] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the cathode plate 11 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention forms a spacer 113, wherein the spacer 113 is arranged between the sealing groove 1102 and the second through hole 1101, so that when the PEM fuel cell monomer 10 and the adjacent PEM fuel cell monomer 10' are stacked and form a fuel cell stack, the sealing gasket 16 arranged in the sealing groove 1102 of the cathode plate 11 of the PEM fuel cell monomer 10 is not easy to be excessively deformed under compression, so as to block the second through hole 1101 of the cathode plate 11 and / or block the first through hole 1201' of the anode plate 12' of the PEM fuel cell monomer 10'. In addition, the spacer 113 of the cathode plate 11 of the PEM fuel cell monomer 10 can also prevent the sealing gasket 16 from being excessively deformed toward the second through hole 1101 under compression, resulting in failure to form an effective seal between the cathode plate 11 and the anode plate 12' of the PEM fuel cell monomer 10'. It can be understood that the adjacent PEM fuel cell unit 10' includes a cathode plate 11', an anode plate 12', a membrane electrode assembly 13', a cathode seal 14', a cathode seal 15' and a gasket 16'.

[0070] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the cathode plate 11 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention forms a first side 114 and a second side 115 opposite thereto, wherein the sealing groove 1102 extends from the first side 114 to the second side 115, so that when the sealing gasket 16 is disposed in the sealing groove 1102, the cathode plate 11 of the PEM fuel cell monomer 10 and the anode plate 12' of the adjacent PEM fuel cell monomer 10' are subjected to uniform force. Preferably, the width D2 of the sealing groove 1102 is not less than two-thirds of the width D1 of the cathode plate 11.

[0071] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the conduction channel 1203 of the anode plate 12 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention has a first conduction groove 1204 and a second conduction groove 1205 connected to the first conduction groove 1204, wherein the first conduction groove 1204 is formed on the back side 124 of the anode plate 12, and the second conduction groove 1205 is formed on the channel side 123 of the anode plate 12, wherein the first conduction groove 1204 extends from the first through hole 1201, and the second conduction groove 1205 is connected to the first conduction groove 1204. 5 extends from the fuel diffusion channel 1202, so that the second conduction groove 1205 and the first through hole 1201 can be formed on the channel side 123 of the anode plate 12, and the fuel supply path formed by the first through hole 1201, the second conduction groove 1205 of the conduction channel 1203, the fuel diffusion channel 1202, and the first conduction groove 1204 of the anode plate 12 is sealed on both sides of the anode plate 12 through the channel side 123 and the back side 124 of the anode plate 12. In this way, the fuel supply path formed by the first through hole 1201, the conduction channel 1203, and the fuel diffusion channel 1202 of the anode plate 12 can be better sealed. In particular, when the first conduction groove 1204 and the second conduction groove 1205 of the conduction channel 1203 of the anode plate 12 are respectively formed on different sides of the anode plate 12, the anode through hole 1401 and the first cavity 1402 of the anode seal 14 can be arranged separately, and the interval between the two does not affect the conduction between the first through hole 1201 of the anode plate 12 and the fuel diffusion channel 1202 and the flow of fuel from the first through hole 1201 of the anode plate 12 to the fuel diffusion channel 1202. In other words, the above-mentioned conduction between the first through hole 1201 of the anode plate 12 and the fuel diffusion channel 1202 allows the anode through hole 1401 and the first cavity 1402 of the anode seal 14 to be arranged separately, thereby improving the sealing performance of the anode seal 14 to the anode plate 12 and the membrane electrode assembly 13. When the conduction channel 1203, the first through hole 1201 and the fuel diffusion channel 1202 of the anode plate 12 are all formed on the channel side 123 of the anode plate 12, in order to prevent the anode seal 14 from blocking the conduction channel 1203 after deformation, the anode seal 14 will have to be provided with a continuous groove opposite to the conduction channel 1203, and this continuous groove will make the anode seal 14 more likely to deform and destroy the seal of the anode seal 14 between the anode plate 12 and the membrane electrode assembly 13.

[0072] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the conduction channel 1203 of the anode plate 12 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention further forms a first conduction through hole 1206, wherein the first conduction through hole 1206 is arranged between the first conduction groove 1204 and the second conduction groove 1205 of the conduction channel 1203, thereby connecting the first conduction groove 1204 and the second conduction groove 1205 of the conduction channel 1203. In other words, the first conduction through hole 1206 of the conduction channel 1203 is arranged to be connected to the first conduction groove 1204 and the second conduction groove 1205, respectively, so that the first conduction groove 1204 and the second conduction groove 1205 of the conduction channel 1203 are connected to each other.

[0073] It is worth noting that the first conducting groove 1204 of the conducting channel 1203 of the anode plate 12 is arranged to face the spacer 113 of the cathode plate 11, so that the first conducting groove 1204 of the conducting channel 1203 can be sealed by the spacer 113. Further, since the first conducting groove 1204 of the conducting channel 1203 is arranged to face the spacer 113 of the cathode plate 11, the first conducting groove 1204 of the conducting channel 1203 can be sealed by the sealing gasket 16 of the adjacent fuel cell monomer. Figure 2D and Figure 2E As shown, since the first conduction groove 1204' of the conduction channel of the anode plate 12' of the fuel cell monomer 10' is arranged to be opposite to the partition portion of the cathode plate 11', the first conduction groove 1204' of the conduction channel of the anode plate 12' of the fuel cell monomer 10' is sealed between the anode plate 12' of the fuel cell monomer 10' and the cathode plate 11 of the fuel cell monomer 10 by the sealing gasket 16 of the adjacent fuel cell monomer 10.

[0074] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the membrane electrode assembly 13 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention has at least one membrane through hole 1301, wherein the membrane through hole 1301 is respectively connected to the cathode through hole 1501 of the cathode seal 15 (or the second through hole 1101 of the cathode plate 11) and the anode through hole 1401 of the anode seal 14 (or the first through hole 1201 of the anode plate 12). Optionally, the size of the membrane through hole 1301 of the membrane electrode assembly 13 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention is much larger than the anode through hole 1401 of the anode seal 14 and the cathode through hole 1501 of the cathode seal 15, or as shown in the accompanying drawings Figure 8As shown, the membrane electrode assembly 13A has at least one notch 1301A facing the anode through hole 1401 of the anode seal 14 and the cathode through hole 1501 of the cathode seal 15, so that the anode through hole 1401 of the anode seal 14 and the cathode through hole 1501 of the cathode seal 15 are directly connected.

[0075] As shown in the attached picture FIG. 2A to FIG. 7C As shown, according to the first preferred embodiment of the present invention, the present invention further provides a sealing device for a PEM fuel cell monomer, wherein the sealing device comprises at least one anode seal 14, wherein the anode seal 14 is suitable for being arranged between the membrane electrode assembly and the anode plate of the PEM fuel cell monomer, wherein the anode seal 14 forms at least one anode through hole 1401. Further, the anode seal 14 comprises at least one second sealing portion 142 extending inwardly from the first sealing portion 141, wherein the first sealing portion 141 of the anode seal 14 forms a first cavity 1402, wherein the first cavity 1402 is arranged (or formed) in the anode seal 14 to be separated from the anode through hole 1401.

[0076] As shown in the attached picture FIG. 2A to FIG. 7C As shown, the sealing device for a PEM fuel cell monomer of the present invention further includes a cathode seal 15, wherein the cathode seal 15 is arranged between the cathode plate 11 and the membrane electrode assembly 13, wherein the cathode seal 15 forms at least one cathode through hole 1501, and the cathode through hole 1501 of the cathode seal 15 is arranged to be connected with the second through hole 1101 of the cathode plate 11 and the anode through hole 1401 of the anode seal 14, respectively, so that the second through hole 1101 of the cathode plate 11, the cathode through hole 1501 of the cathode seal 15, the anode through hole 1401 of the anode seal 14 and the first through hole 1201 of the anode plate 12 form the fuel flow channel 101.

[0077] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the anode seal 14 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention further has an anode flow guide groove 1403, wherein the anode flow guide groove 1403 is formed in the second sealing portion 142, wherein the anode flow guide groove 1403 is connected to the first cavity 1402, and the anode flow guide groove 1403 and the first cavity 1402 are formed in the anode seal 14 to be separated from the anode through hole 1401. In other words, there is a gap 1421 between the anode through hole 1401 and the first cavity 1402, and between the anode through hole 1401 and the anode flow guide groove 1403 of the anode seal 14, so as to perform partition sealing on the anode plate 12 and the membrane electrode assembly 13 respectively facing the anode through hole 1401, the anode flow guide groove 1403 and the first cavity 1402, thereby improving the sealing between the anode plate 12 and the membrane electrode assembly 13. Preferably, the anode conduction groove 1403 of the anode seal 14 is arranged to be opposite to the second conduction groove 1205 of the conduction channel 1203 of the anode plate 12, and the shape and size of the anode conduction groove 1403 are formed according to the second conduction groove 1205 of the conduction channel 1203 of the anode plate 12, so that the anode conduction groove 1403 matches the second conduction groove 1205 of the conduction channel 1203, thereby avoiding the anode seal 14 from deforming and blocking the second conduction groove 1205 of the conduction channel 1203 of the anode plate 12 when the anode seal 14 is arranged between the anode plate 12 and the membrane electrode assembly 13 and is squeezed.

[0078] As shown in the attached picture FIG. 2A to FIG. 7CAs shown, the cathode seal 15 of the PEM fuel cell monomer 10 according to the first preferred embodiment of the present invention further has a cathode flow guide groove 1503, wherein the cathode flow guide groove 1503 is formed on the cathode sealing portion 152, wherein the cathode flow guide groove 1503 is connected to the second cavity 1502. Preferably, the shape and size of the cathode flow guide groove 1503 of the cathode seal 15 are formed according to the anode flow guide groove 1403 of the anode seal 14, so that the cathode flow guide groove 1503 of the cathode seal 15 can be arranged opposite to the anode flow guide groove 1403 of the anode seal 14, thereby avoiding that when the cathode seal 15 is arranged between the cathode plate 11 and the membrane electrode assembly 13 and is squeezed, the cathode seal 15 is deformed and presses the membrane electrode assembly 13, so that the cathode seal 15 is attached to the membrane electrode assembly 13 and the electrochemical reaction area of ​​the cathode plate 11 becomes smaller. In addition, the cathode flow guide groove 1503 of the cathode seal 15 also prevents the membrane electrode assembly 13 from being pressed and attached to the anode plate 12, resulting in the conduction channel 1203 of the anode plate 12 being blocked and the fuel supply being affected. More preferably, the cathode flow guide groove 1503 and the second cavity 1502 of the cathode seal 15 are both arranged on the cathode seal 15 separated from the cathode through hole 1501. In other words, there are sealing structures between the cathode through hole 1501 and the second cavity 1502 of the cathode seal 15, and between the cathode through hole 1501 and the cathode flow guide groove 1503, so as to strengthen the airtightness between the cathode plate 11 and the membrane electrode assembly 13.

[0079] Therefore, the anode seal 14 of the sealing device for a PEM fuel cell monomer of the present invention forms an annular continuous sealing structure between the membrane electrode assembly 13 of the PEM fuel cell monomer and the anode plate 12, which surrounds the fuel diffusion channel 1202 and the second conduction groove 1205 of the anode plate 12, and further forms an annular continuous sealing structure around the first through hole 1201 of the anode plate 12 of the anode plate 12; the cathode seal 15 forms an annular continuous sealing structure between the cathode plate 11 and the membrane electrode assembly 13. The sealing structure; the sealing gasket 16 forms an annular continuous sealing structure around the first through hole 1201 and the first conducting groove 1204 of the anode plate 12 between the second side 112 of the cathode plate 11 and the anode plate 12' of another adjacent PEM fuel cell monomer 10', thereby ensuring that a good seal is formed between the cathode plate 11 and the membrane electrode assembly 13 of the exemplary PEM fuel cell monomer, between the anode plate 12 and the membrane electrode assembly 13, and between the anode plate and the cathode plate of two adjacent PEM fuel cell monomers 10. It can be understood by those skilled in the art that the shape and layout of the fuel diffusion channel 1202 of the anode plate 12 and the oxidant (such as oxygen or air) supply channel of the cathode plate 11 are not affected by the sealing device for PEM fuel cell monomers of the present invention.

[0080] Referring to the accompanying drawings of the present invention FIG. 9A to FIG. 14According to a second preferred embodiment of the present invention, a PEM fuel cell monomer 10A is illustrated, wherein the PEM fuel cell monomer 10A can be stacked and used to form a PEM fuel cell stack, wherein the PEM fuel cell monomer 10A of the present invention includes a cathode plate 11A, an anode plate 12A, a membrane electrode assembly 13A and an anode seal 14A, wherein the membrane electrode assembly 13A is arranged between the anode plate 12A and the cathode plate 11A, and the anode seal 14A is arranged between the membrane electrode assembly 13A and the anode plate 12A, wherein the anode plate 12A forms at least one first through hole 1201A, at least one fuel diffusion channel 1202A and at least one first conductive through hole 1203A, and the cathode plate 11A forms at least one second The anode seal 14A forms at least one anode through hole 1401A and a first cavity 1402A, wherein the first conductive through hole 1203A of the anode plate 12A is communicated with the fuel diffusion channel 1202A, wherein the anode through hole 1401A of the anode seal 14A is configured to be respectively communicated with the second through hole 1101A of the cathode plate 11A and the first through hole 1201A of the anode plate 12A, so that the second through hole 1101A of the cathode plate 11A, the anode through hole 1401A of the anode seal 14A and the first through hole 1201A of the anode plate 12A can form a fuel flow channel 101A for supplying fuel to the fuel diffusion channel 1202A of the anode plate 12A. Accordingly, the fuel, such as hydrogen, flowing through the fuel flow channel 101A can flow from the second through hole 1101A of the cathode plate 11A to the first conductive through hole 1203A of the anode plate 12A, and then flow to the fuel diffusion channel 1202A of the anode plate 12A. It can be understood that the anode seal 14A is disposed between the membrane electrode assembly 13A and the anode plate 12A to ensure the airtightness between the membrane electrode assembly 13A and the anode plate 12A. Accordingly, the anode seal 14A of the PEM fuel cell monomer 10A of the present invention is disposed between the anode plate 12A and the membrane electrode assembly 13A to form a seal (structure) to prevent leakage of fuel, such as hydrogen. As shown in the accompanying drawings FIG. 9A to FIG. 14As shown, more preferably, the cathode plate 11A forms two second through holes 1101A, the anode plate 12A forms two first through holes 1201A, two first conductive through holes 1203A and at least one fuel diffusion channel 1202A, and the anode seal 14A forms two anode through holes 1401A, wherein the second through holes 1101A of the cathode plate 11A are respectively arranged at both ends of the cathode plate 11A, the first through holes 1201A of the anode plate 12A are respectively arranged at both ends of the anode plate 12A, and the first through holes 1201A 1A are respectively connected to the fuel diffusion channel 1202A, the anode through hole 1401A of the anode seal 14A is respectively arranged at both ends of the anode seal 14A, and the anode through hole 1401A of the anode seal 14A, the second through hole 1101A of the cathode plate 11A and the first through hole 1201A of the anode plate 12A form two fuel flow channels 101A respectively connected to the fuel diffusion channel 1202A of the anode plate 12A, so that hydrogen can be provided (or supplied) through the fuel flow channels 101A.

[0081] As shown in the attached picture FIG. 9A to FIG. 14 As shown, the cathode plate 11A of the PEM fuel cell unit 10A according to the second preferred embodiment of the present invention has a first side 111A facing the membrane electrode assembly 13A and a second side 112A facing opposite to the first side 111A, and the anode plate 12A has a channel side 123A facing the membrane electrode assembly 13A and a back side 124A facing opposite to the channel side 123A. In other words, the membrane electrode assembly 13A of the PEM fuel cell unit 10A is arranged to face the anode plate 12A and the cathode plate 11A respectively.

[0082] As shown in the attached picture FIG. 9A to FIG. 14As shown, the first through hole 1201A and the first conductive through hole 1203A of the anode plate 12A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention are formed separately on the anode plate 12A, and the anode through hole 1401A and the first cavity 1402A of the anode seal 14A are formed separately on the anode seal 14A. In other words, there is a gap 1421A between the anode through hole 1401A and the first cavity 1402A of the anode seal 14A, so as to perform partition sealing between the second through hole 1101A of the cathode plate 11A, the first through hole 1201A of the anode plate 12A, and the first conductive through hole 1203A. Accordingly, through the above partition sealing method, the fuel supply structure part (or the part where the fuel flow channel 101A is located) and the fuel diffusion structure part (or the part where the fuel diffusion channel 1202A is located) of the anode plate 12A are sealed respectively, thereby improving the airtightness between the anode plate 12A and the membrane electrode assembly 13A. In addition, this partition sealing method can also make the anode plate 12A and the cathode plate 11A of the fuel cell monomer 10A of the present invention more uniformly stressed.

[0083] As shown in the attached picture FIG. 9A to FIG. 14 As shown, according to the PEM fuel cell monomer 10A of the second preferred embodiment of the present invention, preferably, the anode through hole 1401A of the anode seal 14A is arranged to be respectively opposite to the second through hole 1101A of the cathode plate 11A and the first through hole 1201A of the anode plate 12A, and the first cavity 1402A of the anode seal 14A is arranged to be respectively opposite to the first conductive through hole 1203A and the fuel diffusion channel 1202A of the anode plate 12A, so as to prevent the anode seal 14A from being squeezed and deformed to block the second through hole 1101A of the cathode plate 11A, the first through hole 1201A of the anode plate 12A and the first conductive through hole 1203A.

[0084] As shown in the attached picture FIG. 9A to FIG. 14As shown, the cathode plate 11A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention further includes a guide groove 1102A, wherein the guide groove 1102A of the cathode plate 11A is connected to the second through hole 1101A, and the guide groove 1102A of the cathode plate 11A is configured to be able to be connected to the first through hole 1201A' and the first conductive through hole 1203A' of the anode plate 12A' of another PEM fuel cell monomer 10A' respectively. The fuel flow channel 101A is connected so that the hydrogen flowing through the fuel flow channel 101A can flow from the second through hole 1101A of the cathode plate 11A of the PEM fuel cell monomer 10A to the guide groove 1102A of the cathode plate 11A, and flow from the guide groove 1102A to the first conduction through hole 1203A' and the first through hole 1201A' of the anode plate 12A' of the PEM fuel cell monomer 10A', and then flow to the fuel diffusion channel 1202A' of the anode plate 12A'. In other words, the guide groove 1102A of the cathode plate 11A is connected to the second through hole 1101A of the cathode plate 11A, and the guide groove 1102A of the cathode plate 11A is arranged to face the first conduction through hole 1203A of the anode plate 12A.

[0085] As shown in the attached picture Figures 8 to 14 As shown in the figure, the anode plate 12A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention includes an anode plate body 121A and a sealing edge 122A extending outward from the anode plate body 121A, and the anode seal 14A includes a first sealing portion 141A, wherein the first sealing portion 141A of the anode seal 14A is disposed between the sealing edge 122A of the anode plate 12A and the membrane electrode assembly 13A. FIG. 2A to FIG. 7C As shown, preferably, the first sealing portion 141A of the anode seal 14A has a continuous annular structure, so as to form a continuous sealing mechanism between the sealing edge 122A of the anode plate 12A and the membrane electrode assembly 13A to ensure that hydrogen will not leak between the anode plate 12A and the membrane electrode assembly 13A. More preferably, the sealing edge 122A of the anode plate 12A forms a flat and continuous sealing surface to ensure that the first sealing portion 141A forms a good seal between the anode plate 12A and the membrane electrode assembly 13A.

[0086] As shown in the attached picture FIG. 9A to FIG. 14As shown, according to the second preferred embodiment of the present invention, the anode plate body 121A of the anode plate 12A of the PEM fuel cell monomer 10A includes a fuel diffusion portion 1211A and at least one conductive portion 1212A extending outward from the fuel diffusion portion 1211A, and the anode seal 14A further includes at least one second sealing portion 142A extending inward from the first sealing portion 141A, wherein the first through hole 1201A and the first conductive through hole 1203A of the anode plate 12A are formed in the conductive portion 1212A of the anode plate body 121A, the fuel diffusion channel 1202A is formed in the fuel diffusion portion 1211A, and the anode through hole 1401A and the first cavity 1402A of the anode seal 14A are formed in the second sealing portion 142A. Preferably, the first conductive through hole 1203A and the fuel diffusion channel 1202A of the anode plate 12A are arranged to face the first cavity 1402A of the anode seal 14A, so that a fuel diffusion space 102 facing the fuel diffusion channel 1202A of the anode plate 12A is formed between the membrane electrode assembly 13A and the anode plate 12A, wherein the fuel diffusion space 102 can be used to accommodate fuel, such as hydrogen. More preferably, the anode through hole 1401A of the anode seal 14A is arranged to face the first through hole 1201A of the anode plate 12A, and the shape and size of the anode through hole 1401A of the anode seal 14A are formed according to the first through hole 1201A of the anode plate 12A, so that the anode through hole 1401 of the anode seal 14A matches the first through hole 1201A of the anode plate 12A, thereby preventing the anode seal 14A from deforming and blocking the first through hole 1201A of the anode plate 12A when the anode seal 14A is arranged between the anode plate 12A and the membrane electrode assembly 13A and is squeezed. Most preferably, the anode seal 14A is made of a flexible sealing material. Accordingly, when the anode seal 14A is configured to have an appropriate thickness, a good seal can be formed between the anode plate 12A and the membrane electrode assembly 13A to prevent hydrogen from leaking between the anode plate 12A and the membrane electrode assembly 13A.

[0087] As shown in the attached picture FIG. 9A to FIG. 14As shown, the first through hole 1201A and the first conductive through hole 1203A of the anode plate 12A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention are respectively arranged at the two ends of the conductive portion 1212A of the anode plate 12A. Correspondingly, the anode through hole 1401A and the first cavity 1402A of the anode seal 14A are respectively arranged at the two ends of the second sealing portion 142A of the anode seal 14A, so that the force between the cathode plate 11A and the anode plate 12A of the PEM fuel cell monomer 10A is more uniform and a better seal is formed. Preferably, the distance between the first through hole 1201A and the first conductive through hole 1203A of the anode plate 12A is not less than one third of the width of the conductive portion 1212A of the anode plate 12A.

[0088] As shown in the attached picture FIG. 9A to FIG. 14 As shown, the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention further includes at least one cathode seal 15A, wherein the cathode seal 15A is disposed between the cathode plate 11A and the membrane electrode assembly 13A to form a seal between the cathode plate 11A and the membrane electrode assembly 13A and prevent hydrogen from leaking between the cathode plate 11A and the membrane electrode assembly 13A. FIG. 9A to FIG. 14 As shown, further, the cathode seal 15A forms a cathode through hole 1501A, and the cathode through hole 1501A of the cathode seal 15A is configured to be connected with the second through hole 1101A of the cathode plate 11A and the anode through hole 1401A of the anode seal 14A, respectively, so that the second through hole 1101A of the cathode plate 11A, the cathode through hole 1501A of the cathode seal 15A, the anode through hole 1401A of the anode seal 14A and the first through hole 1201A of the anode plate 12A can form a fuel flow channel 101A for providing fuel to the fuel diffusion channel 1202A of the anode plate 12A.

[0089] As shown in the attached picture FIG. 9A to FIG. 14As shown, the cathode seal 15A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention further forms a second cavity 1502A, wherein the second cavity 1502A of the cathode seal 15A is arranged opposite to the first cavity 1402A of the anode seal 14A, and the cathode through hole 1501A of the cathode seal 15A is arranged opposite to the anode through hole 1401A of the anode seal 14A, wherein the shape and size of the second cavity 1502A of the cathode seal 15A are formed according to the first cavity 1402 of the anode seal 14A, and the shape and size of the cathode through hole 1501A of the cathode seal 15A are formed according to the first cavity 1402 of the anode seal 14A. The anode through hole 1401A of the anode seal 14A is formed so that the second cavity 1502A of the cathode seal 15A can face the first cavity 1402A of the anode seal 14A, and the cathode through hole 1501A of the cathode seal 15A can face the anode through hole 1401A of the anode seal 14A, thereby avoiding that when the cathode seal 15A is arranged between the cathode plate 11A and the membrane electrode assembly 13A and is squeezed, the cathode seal 15A is prevented from being deformed and compressing the membrane electrode assembly 13A, so that the cathode seal 15A is attached to the membrane electrode assembly 13A and the electrochemical reaction area of ​​the cathode plate 11A becomes smaller. In addition, the second cavity 1502A of the cathode seal 15A also prevents the membrane electrode assembly 13A from being pressed and attached to the anode plate 12A, resulting in the first conductive through hole 1203A and / or the fuel diffusion channel 1202A of the anode plate 12A being blocked and the fuel supply being affected. More preferably, the cathode through hole 1501A and the second cavity 1502A of the cathode seal 15A are separated and arranged on the cathode seal 15A. In other words, there is a sealing structure between the cathode through hole 1501A and the second cavity 1502A of the cathode seal 15A to strengthen the airtightness between the cathode plate 11A and the membrane electrode assembly 13A. Accordingly, the cathode seal 15A is preferably made of a flexible sealing material, and when the cathode seal 15A has an appropriate thickness, a good seal can be formed between the cathode plate 11A and the membrane electrode assembly 13A to prevent hydrogen from leaking between the cathode plate 11A and the membrane electrode assembly 13A.

[0090] As shown in the attached picture FIG. 9A to FIG. 14As shown, the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention further includes a sealing gasket 16A, wherein the sealing gasket 16A is arranged in the guide groove 1102A of the cathode plate 11A, and the sealing gasket 16A is arranged around the second through hole 1101A of the cathode plate 11A, so that the second side 112A of the cathode plate 11A and the anode plate 12A' of another PEM fuel cell monomer 10A' are sealed by the sealing gasket 16A and prevent the fuel from leaking from the second side 112A of the cathode plate 11A and the anode plate 12A' of another PEM fuel cell monomer 10A'. In other words, the sealing gasket 16A forms a seal between the second side 112A of the cathode plate 11A and the anode plate 12A' of another PEM fuel cell monomer 10A'. It can be understood that the sealing gasket 16A is made of a sealing material, such as rubber, and the sealing gasket 16A has an appropriate thickness. Those skilled in the art will appreciate that the thickness of the sealing gasket 16A should be slightly greater than the depth of the guide groove 1102A.

[0091] As shown in the attached picture FIG. 9A to FIG. 14 As shown, the cathode plate 11A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention forms a first side 114A and a second side 115A opposite thereto, wherein the guide groove 1102A extends from the first side 114A to the second side 115A, so that when the sealing gasket 16A is disposed in the guide groove 1102A, the cathode plate 11A of the PEM fuel cell monomer 10A and the anode plate 12A' of the adjacent PEM fuel cell monomer 10A' are subjected to uniform force. Preferably, the width D2 of the guide groove 1102A is not less than two-thirds of the width D1 of the cathode plate 11A. It can be understood that the adjacent PEM fuel cell monomer 10A' includes a cathode plate 11A', an anode plate 12A', a membrane electrode assembly 13A', a cathode seal 14A', a cathode seal 15A' and a sealing gasket 16A'.

[0092] As shown in the attached picture FIG. 9A to FIG. 14 As shown, the membrane electrode assembly 13A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention has at least one notch 1301A facing the anode through hole 1401A of the anode seal 14A and the cathode through hole 1501A of the cathode seal 15A, so that the anode through hole 1401A of the anode seal 14A and the cathode through hole 1501A of the cathode seal 15A are directly connected. Figure 5As shown, optionally, the membrane electrode assembly 13 of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention has a membrane through hole 1301, wherein the membrane through hole 1301 is respectively connected to the cathode through hole 1501A of the cathode seal 15A (or the second through hole 1101A of the cathode plate 11A) and the anode through hole 1401A of the anode seal 14A (or the first through hole 1201A of the anode plate 12A).

[0093] Fig.15A and Fig. 15B The figure shows an optional implementation of the cathode plate 11A of the PEM fuel cell monomer 10A according to the second preferred embodiment of the present invention, wherein the cathode plate 11B has a second through hole 1101B, a guide groove 1102B, a sealing groove 1103B and a spacer 113B, wherein the sealing groove 1103B is arranged around the guide groove 1102B of the cathode plate 11B, and the spacer 113B is arranged between the guide groove 1102B and the sealing groove 1103B. B, so that when the PEM fuel cell monomer 10A and the adjacent PEM fuel cell monomer 10A' are stacked and form a fuel cell stack, the sealing gasket 16A disposed in the sealing groove 1103B of the cathode plate 11B is not easy to be excessively deformed under extrusion, so as to block the second through hole 1101B of the cathode plate 11B and / or block the first through hole 1201A' of the anode plate 12A' of the PEM fuel cell monomer 10A'. In addition, the spacer 113B of the cathode plate 11B can also prevent the sealing gasket 16A from being excessively deformed into the guide groove 1102B under extrusion, resulting in failure to form an effective seal between the cathode plate 11B and the anode plate 12A' of the PEM fuel cell monomer 10A'.

[0094] As shown in the attached picture FIG. 9A to FIG. 14 As shown, according to the second preferred embodiment of the present invention, the present invention further provides a sealing device for a PEM fuel cell monomer, wherein the sealing device includes the anode seal 14A and the cathode seal 15A, wherein the anode seal 14A forms at least one anode through hole 1401A and a first cavity 1402A, and the cathode seal 15A forms a cathode through hole 1501A and a second cavity 1502A, wherein the second cavity 1502A of the cathode seal 15A is arranged opposite to the first cavity 1402A of the anode seal 14A, and the cathode through hole 1501A of the cathode seal 15A is arranged opposite to the anode through hole 1401A of the anode seal 14A.

[0095] Therefore, the anode seal 14A of the sealing device for a PEM fuel cell monomer of the present invention forms an annular continuous sealing structure around the fuel diffusion channel 1202A and the first conductive through hole 1203A of the anode plate 12A between the membrane electrode assembly 13A of the PEM fuel cell monomer and the anode plate 12A, and further forms an annular continuous sealing structure around the first through hole 1201A of the anode plate 12A; the cathode seal 15A forms an annular continuous sealing structure around the second through hole 1101A of the cathode plate 11A between the cathode plate 11A and the membrane electrode assembly 13A. The sealing gasket 16A forms an annular continuous sealing structure around the first through hole 1201A and the guide groove 1102A of the anode plate 12A between the second side 112A of the cathode plate 11A and the anode plate 12A' of another adjacent PEM fuel cell monomer 10A', thereby ensuring that a good seal is formed between the cathode plate 11A and the membrane electrode assembly 13A of the exemplary PEM fuel cell monomer, between the anode plate 12A and the membrane electrode assembly 13A, and between the anode plate 12A and the cathode plate 11A of two adjacent PEM fuel cell monomers 10A. It can be understood by those skilled in the art that the shape and layout of the fuel diffusion channel 1202A of the anode plate 12A and the oxidant (such as oxygen or air) supply channel of the cathode plate 11A are not affected by the sealing device for PEM fuel cell monomers of the present invention.

[0096] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only for illustrative purposes and are not intended to limit the present invention.

[0097] The purpose of the present invention has been completely and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A proton exchange membrane fuel cell monomer, characterized in that: include: a gasket; a cathode plate; a membrane electrode assembly; an anode plate; a cathode seal; and An anode seal, wherein the membrane electrode assembly is arranged between the cathode plate and the anode plate, the anode seal is arranged between the membrane electrode assembly and the anode plate, wherein the anode plate forms at least one first through hole, at least one fuel diffusion channel and at least one conduction channel, the cathode plate forms at least one second through hole, the anode seal forms at least one anode through hole and a first cavity, wherein the anode through hole and the first cavity of the anode seal are formed separately on the anode seal, the first through hole of the anode plate is arranged to communicate with the fuel diffusion channel of the anode plate, the conduction channel is respectively connected to the first through hole and the fuel diffusion channel of the anode plate, and the conduction channel has a first conduction groove and a first conduction groove connected to the first conduction groove. The anode plate is provided with a second conducting groove connected to the through groove, the first conducting groove is formed on the back side of the anode plate, the second conducting groove is formed on the channel side of the anode plate, the first cavity of the anode seal is arranged to face the fuel diffusion channel of the anode plate, the anode through hole of the anode seal is arranged to be connected to the second through hole of the cathode plate and the first through hole of the anode plate respectively, so that the anode through hole of the anode seal, the second through hole of the cathode plate and the first through hole of the anode plate can form a fuel flow channel for supplying fuel to the fuel diffusion channel of the anode plate, wherein the cathode seal is arranged between the cathode plate and the membrane electrode assembly, wherein the cathode seal forms at least one cathode through hole and a second cavity, and the cathode seal The cathode through hole and the second cavity are separated and formed on the cathode seal, the cathode through hole of the cathode seal is configured to be able to communicate with the second through hole of the cathode plate and the anode through hole of the anode seal respectively, so that the second through hole of the cathode plate, the cathode through hole of the cathode seal, the anode through hole of the anode seal and the first through hole of the anode plate form the fuel flow channel, the second cavity of the cathode seal is configured to face the first cavity of the anode seal, and the shape and size of the second cavity of the cathode seal are formed according to the first cavity of the anode seal, wherein the anode seal has an anode guide groove, the anode guide groove is configured to face the second conduction groove of the conduction channel, and the cathode seal has a cathode a cathode flow groove, the cathode flow groove is arranged opposite to the anode flow groove, and the shape and size of the cathode flow groove are formed according to the anode flow groove, wherein the cathode plate has a first side facing the membrane electrode assembly and a second side opposite to the first side, and the cathode plate further has a sealing groove, wherein the sealing groove is arranged on the second side of the cathode plate, wherein the sealing groove is arranged to surround the second through hole of the cathode plate, and the sealing gasket is arranged in the sealing groove, wherein there is a gap between the anode through hole of the anode seal and the first cavity, and between the anode through hole and the anode flow groove, so as to perform partition sealing between the anode plate and the membrane electrode assembly facing the anode through hole, the anode flow groove and the first cavity, respectively,The shape and size of the anode flow channel are formed according to the second conduction channel of the conduction channel of the anode plate, wherein the cathode flow channel is connected to the second cavity, wherein there is a sealing structure between the cathode through hole of the cathode seal and the second cavity, and between the cathode through hole and the cathode flow channel.

2. The proton exchange membrane fuel cell monomer according to claim 1, characterized in that: The anode plate includes an anode plate body and a sealing edge extending outward from the anode plate body, and the anode seal includes a first sealing portion and at least one second sealing portion extending inward from the first sealing portion, wherein the first sealing portion of the anode seal is arranged between the sealing edge of the anode plate and the membrane electrode assembly.

3. The proton exchange membrane fuel cell monomer according to claim 2, characterized in that: The conducting channel is formed on the anode plate body of the anode plate.

4. The proton exchange membrane fuel cell monomer according to claim 3, characterized in that: The anode plate body comprises a fuel diffusion portion and at least one conduction portion extending outward from the fuel diffusion portion, wherein the first through hole and the conduction channel of the anode plate are formed in the conduction portion of the anode plate body, the fuel diffusion channel is formed in the fuel diffusion portion, and the anode through hole of the anode seal is formed in the second sealing portion.

5. The proton exchange membrane fuel cell monomer according to claim 2, characterized in that: The first cavity is formed in the first sealing portion of the anode seal.

6. The proton exchange membrane fuel cell monomer according to claim 1, characterized in that: The membrane electrode assembly has at least one membrane through hole, wherein the membrane through hole is respectively connected with the cathode through hole of the cathode seal and the anode through hole of the anode seal.

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