Membrane electrode frame, membrane electrode and single cell

Abstract

The present invention relates to a membrane electrode frame, a membrane electrode and a single cell, the membrane electrode frame comprises: a plurality of frame segments, each frame segment has two end portions, the first surface of the frame segment along the thickness direction is provided with a sealant groove, the plurality of frame segments are sequentially connected along the circumferential direction to define a central chamber, and the first surface of the frame segment is provided with a sealant groove; the sealant grooves of every two adjacent frame sections are communicated, and the two ends, close to each other, of every two adjacent frame sections are arranged in an inserted mode. According to the invention, the plurality of frame sections are mutually inserted to form the membrane electrode frame, the waste of base materials caused by processing and manufacturing of the membrane electrode frame is reduced, the utilization rate of the base materials is improved, and the sealant grooves of the adjacent frame sections can be communicated, so that the sealant grooves of the plurality of frame sections are communicated to form a whole sealant groove, and the sealing effect of the membrane electrode frame is improved. After the colloid is injected, the connection between the two adjacent frame sections can be further enhanced, and the stability and the reliability of the whole structure are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a membrane electrode frame, a membrane electrode and a single cell. BACKGROUND

[0002] As a high-efficiency and clean energy conversion device, fuel cells directly generate electricity through hydrogen-oxygen electrochemical reaction, have the advantages of zero emission, high energy density and fast start, and are regarded as an important part of future energy system. In the prior art, the membrane electrode frame is usually an integrated structure obtained by cutting off the central region of the substrate, and the proton exchange membrane is attached to the membrane electrode frame by hot pressing and covers the central region. Therefore, the utilization rate of the membrane electrode frame substrate is low, causing waste. SUMMARY

[0003] One of the purposes of the present application is to provide a membrane electrode frame to solve the problem of low utilization rate of the membrane electrode frame substrate in the prior art, causing waste; the second purpose is to provide a membrane electrode; and the third purpose is to provide a single cell.

[0004] In order to achieve the above-mentioned purposes, the technical scheme adopted by the present application is as follows:

[0005] A membrane electrode frame comprises: frame segments, provided with a plurality of segments, each of the frame segments has two end portions, a sealant groove is formed on a first surface in the thickness direction, the plurality of frame segments are connected in sequence along the circumference to form a central chamber, and the sealant grooves of adjacent two frame segments are connected, and the two end portions of the adjacent two frame segments are inserted.

[0006] According to the above technical means, the plurality of frame segments are inserted to form a membrane electrode frame, which reduces the waste of the substrate caused by the processing and manufacturing of the membrane electrode frame, improves the utilization rate of the substrate, and the sealant grooves of adjacent frame segments can be connected, so that the sealant grooves of the plurality of frame segments are connected to form a whole groove, which can further strengthen the connection between the adjacent two frame segments after injecting the glue, and improve the stability and reliability of the overall structure.

[0007] Further, in the two end portions of the adjacent two frame segments, one of the end portions has an insertion part, the other end portion has a slot and forms a limiting part on the opposite sides of the slot, and the insertion part is inserted into the slot; in the direction perpendicular to the thickness direction and the connection direction of the adjacent two frame segments, the insertion part is clamped between the two limiting parts.

[0008] According to the above technical means, the insertion direction of the insertion part and the slot is perpendicular to the pressure direction of the gas in use, so that the membrane electrode frame will not cause the insertion fit of the adjacent two frame segments to fail when subjected to the pressure of the gas in use, further improve the connection strength between the adjacent two frame segments, and ensure the structural stability and reliability of the membrane electrode frame.

[0009] Further, the two opposite surfaces of the insertion part and the limiting part are nested by the limiting protrusion and the limiting groove, the limiting protrusion is formed on one of the two opposite surfaces of the insertion part and the limiting part, and the limiting groove is formed on the other of the two opposite surfaces of the insertion part and the limiting part.

[0010] According to the above technical means, the insertion part and the limiting part are further nested and connected by the limiting protrusion and the limiting groove, the insertion part and the limiting part are further fixed, the connection stability of the adjacent frame segments is improved, and the structural stability and reliability of the membrane electrode frame are further ensured.

[0011] Further, along the connection direction of the adjacent two frame segments, the limiting protrusion is sequentially provided with a plurality of limiting protrusions, and the limiting groove is also provided with a plurality of limiting grooves, and the plurality of limiting protrusions and the plurality of limiting grooves are one-to-one corresponding; and / or,

[0012] The limiting groove is provided through along the thickness direction, and the limiting protrusion is provided along the thickness direction to match the limiting groove.

[0013] According to the above technical means, the limiting protrusion and the limiting groove are matched with a plurality of limiting protrusions and a plurality of limiting grooves, which improves the connection strength of the insertion part and the limiting part.

[0014] The limiting groove and the limiting protrusion are provided along the entire thickness direction, which facilitates the assembly of the insertion part and the limiting part, improves the limiting effect of the limiting groove and the limiting protrusion, and improves the connection strength of the insertion part and the limiting part.

[0015] Further, the first surface of at least one of the frame segments is formed with a glue injection port, and the glue injection port is in communication with the sealant groove; and / or,

[0016] The first surface of each of the frame segments is formed with at least one glue discharge port, and the glue discharge port is in communication with the sealant groove.

[0017] According to the above technical means, after the sealing glue grooves of the several frame segments are communicated to form a whole glue groove, at least one glue injection port is used to inject glue into the glue groove, and further, each frame segment is provided with a glue discharge port for discharging air during the glue injection process, which is beneficial to improve the glue injection rate and can ensure that each sealing glue groove is filled with glue, thereby forming a complete and continuous sealing glue.

[0018] Further, the several frame segments include two end segments and several intermediate segments, the two end segments are arranged opposite to each other along the length direction, and the several intermediate segments are connected between the two end segments.

[0019] According to the above technical means, the two end segments and the several intermediate segments are used to form a frame structure with a central chamber.

[0020] Further, the end segment is provided with a hydrogen flow passage along the thickness direction, the end segment is provided with a hydrogen duct, and the hydrogen flow passage is communicated with the central chamber through the hydrogen duct; or,

[0021] The end segment is provided with an air flow passage along the thickness direction, the end segment is provided with an air duct, and the air flow passage is communicated with the central chamber through the air duct.

[0022] According to the above technical means, the hydrogen duct is used to make the hydrogen flow uniformly between the hydrogen flow passage and the central chamber.

[0023] The air duct is used to make the air flow uniformly between the air flow passage and the central chamber.

[0024] Further, the end segment is provided with a cooling water flow passage along the thickness direction.

[0025] According to the above technical means, the cooling water flows in the cooling water flow passage to take away the heat generated by the reaction.

[0026] A membrane electrode includes a proton exchange membrane and the membrane electrode frame described above, two membrane electrode frames are arranged on opposite sides of the proton exchange membrane, and the first surface is arranged away from the proton exchange membrane.

[0027] A single cell includes an anode plate, a cathode plate, and the membrane electrode described above, the anode plate and the cathode plate are arranged on opposite sides of the membrane electrode and are arranged in contact with the first surface, so that the sealing glue grooves of the several frame segments form a glue injection channel, the glue injection channel is provided with glue to bond the anode plate and the membrane electrode, and the cathode plate and the membrane electrode.

[0028] The beneficial effects of the present application are as follows:

[0029] (1) The present application utilizes several frame segments to form a membrane electrode frame by mutual insertion, reduces the substrate waste caused by the processing and manufacturing of the membrane electrode frame, improves the substrate utilization rate, and the sealant grooves of adjacent frame segments can be connected, so that the sealant grooves of several frame segments are connected to form a whole groove, which can further strengthen the connection between adjacent two frame segments after injecting glue, and improve the stability and reliability of the overall structure.

[0030] (2) The insertion direction of the insertion part and the insertion groove is perpendicular to the pressure direction of the gas in the use process, so that the insertion fit of adjacent two frame segments will not be invalid when the membrane electrode frame is subjected to the pressure of the gas in the use process, further improving the connection strength of adjacent two frame segments and ensuring the structural stability and reliability of the membrane electrode frame.

[0031] (3) The insertion part and the limiting part are further nested and connected by the limiting protrusion and the limiting groove, the insertion part and the limiting part are further fixed, the connection stability of adjacent frame segments is improved, and the structural stability and reliability of the membrane electrode frame are further ensured.

[0032] (4) The limiting protrusion and the limiting groove are matched and arranged as several, the connection strength of the insertion part and the limiting part is improved; the limiting groove and the limiting protrusion are arranged along the whole thickness direction, which facilitates the assembly of the insertion part and the limiting part, improves the limiting effect of the limiting groove and the limiting protrusion, and improves the connection strength of the insertion part and the limiting part.

[0033] (5) After the sealant grooves of several frame segments are connected to form a whole groove, at least one glue injection port is used to inject glue into the groove, further, the exhaust is carried out during the glue injection process through the glue discharge port of each frame segment, which is beneficial to improve the glue injection rate and can ensure that each sealant groove is filled with glue, thereby forming a complete and coherent sealing glue;

[0034] (6) The two end segments and the several middle segments are utilized to form a frame structure with a central chamber.

[0035] (7) The hydrogen gas channel is utilized to make the hydrogen gas flow uniformly between the hydrogen gas flow-through channel and the central chamber; the air channel is utilized to make the air flow uniformly between the air flow-through channel and the central chamber.

[0036] (8) The cooling water is made to flow in the cooling water flow-through channel to carry away the heat generated by the reaction. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1Structure schematic diagram of the membrane electrode frame as an anode side frame in an embodiment of the present application;

[0038] Figure 2 Structure schematic diagram of the membrane electrode frame as a cathode side frame in an embodiment of the present application;

[0039] Figure 3 Structure schematic diagram of the end section for the anode side frame in an embodiment of the present application;

[0040] Figure 4 Structure schematic diagram of the end section for the cathode side frame in an embodiment of the present application;

[0041] Figure 5 Structure schematic diagram of the middle section in an embodiment of the present application;

[0042] Figure 6 Exploded structure schematic diagram of a single cell in an embodiment of the present application.

[0043] In the figure, 1, frame section; 11, first surface; 12, sealant groove; 13, plug-in part; 14, insertion slot; 15, limiting part; 16, limiting protrusion; 17, limiting groove; 18, glue injection port; 19, glue discharge port; 2, center chamber; 3, end section; 31, hydrogen flow passage; 311, hydrogen inflow passage; 312, hydrogen outflow passage; 32, hydrogen duct; 321, hydrogen inflow duct; 322, hydrogen outflow duct; 33, air flow passage; 331, air inflow passage; 332, air outflow passage; 34, air duct; 341, air inflow duct; 342, air outflow duct; 35, cooling water flow passage; 351, cooling water inflow passage; 352, cooling water outflow passage; 4, middle section; 10, membrane electrode frame; 100, membrane electrode; 200, anode plate; 300, cathode plate; 400, hydrogen cavity sealing ring; 500, cavity sealing ring; 600, water cavity sealing ring. DETAILED DESCRIPTION

[0044] The present application will be described in detail with reference to the attached drawings and preferred embodiments, and other advantages and effects of the present application will be easily understood by those skilled in the art from the disclosure of this specification. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0045] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concepts of the present application, and only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The shapes, number and proportions of the components in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0046] The present embodiment proposes a membrane electrode frame 10, as shown in the drawings, comprising: frame segments 1, provided with a plurality of segments, each frame segment 1 having two end portions, the frame segment 1 being provided with a sealant groove 12 on a first surface 11 in the thickness direction, the plurality of frame segments 1 being sequentially connected in the circumferential direction to enclose a central chamber 2, and the sealant grooves 12 of the two adjacent frame segments 1 being provided in communication, and the two end portions of the two adjacent frame segments 1 being provided in insertion. Figures 1 to 6

[0047] In the present embodiment, the plurality of frame segments 1 are inserted into each other to form the membrane electrode frame 10, reducing the waste of the substrate caused by the processing and manufacturing of the membrane electrode frame 10, and improving the utilization rate of the substrate. In addition, the sealant grooves 12 of the adjacent frame segments 1 can be provided in communication, so that the sealant grooves 12 of the plurality of frame segments 1 are in communication to form a whole groove, which can further strengthen the connection between the two adjacent frame segments 1 after the injection of the gel, and improve the stability and reliability of the overall structure.

[0048] It should be noted that in the related art, the frame structure with the central chamber 2 is formed by cutting the central region of the complete substrate, so as to form the flow field in the single cell by using the central chamber 2. Therefore, in the processing of the membrane electrode frame 10 in the related art, the utilization rate of the substrate material is low, which causes the problem of waste of the substrate.

[0049] In the present embodiment, the membrane electrode frame 10 is divided into a plurality of simple geometric feature units (i.e. frame segments 1), which can be fully utilized in substrate processing and forming, thereby improving the material utilization rate of the substrate and reducing the waste of the material. In addition, the adjacent two frame segments 1 are spliced by the insertion method, which is simple in structure and easy to operate.

[0050] In addition, in the present embodiment, different sizes and numbers of frame segments 1 can be used to splice to form corresponding membrane electrode frames 10 for different models of single cells, which is convenient for the processing of different models of membrane electrode frames 10.

[0051] Specifically, in one embodiment, as shown in the drawings, Figures 1 to 5 ​As shown, in the two ends of the two adjacent frame segments 1 that are close to each other, one end has a plug-in part 13, the other end has a plug-in slot 14 and forms a limiting part 15 on the opposite side of the plug-in slot 14, and the plug-in part 13 is inserted into the plug-in slot 14; in the direction perpendicular to the thickness direction and the connecting direction of the two adjacent frame segments 1, the plug-in part 13 is clamped between the two limiting parts 15. In this way, the plug-in direction of the plug-in part 13 and the plug-in slot 14 is perpendicular to the direction of the gas pressure in use, so that the membrane electrode frame 10 will not cause the plug-in cooperation of the two adjacent frame segments 1 to fail when subjected to the pressure of the gas in use, further improving the connection strength of the two adjacent frame segments 1 and ensuring the structural stability and reliability of the membrane electrode frame 10.

[0052] It is worth noting that in the use of the single cell, the center chamber 2 will contain gas as a flow field, so that the membrane electrode frame 10 is subjected to the pressure outward from the center chamber 2. In this embodiment, please refer to Figure 1 and Figure 2 , the arrangement direction of the plug-in part 13 and the limiting part 15 is the same as the direction of the gas pressure, so that when subjected to the pressure of the gas at the plug-in position of the two ends of the two adjacent frame segments 1, the limiting part 15 can block the plug-in part 13 from moving in the direction of the gas pressure, avoiding the plug-in part 13 from being pulled out from between the two limiting parts 15, thereby ensuring the stability and reliability of the plug-in cooperation between the adjacent frame segments 1, and further ensuring the structural stability and reliability of the entire membrane electrode frame 10.

[0053] It needs to be further explained that, for example, Figure 1 , the thickness direction is the direction perpendicular to the plane in Figure 1 , and the connecting direction of the two adjacent frame segments 1 is the left-right direction in Figure 1 , so the direction perpendicular to the thickness direction and the connecting direction of the two adjacent frame segments 1 is the up-down direction in Figure 1 .

[0054] In one embodiment, as shown in Figures 1 to 5 , the two opposite surfaces of the plug-in part 13 and the limiting part 15 are nested by the limiting protrusion 16 and the limiting groove 17, the limiting protrusion 16 is formed on one of the two opposite surfaces of the plug-in part 13 and the limiting part 15, and the limiting groove 17 is formed on the other of the two opposite surfaces of the plug-in part 13 and the limiting part 15. In this way, the plug-in part 13 and the limiting part 15 are further nested and connected by the limiting protrusion 16 and the limiting groove 17, achieving further fixation of the plug-in part 13 and the limiting part 15, improving the stable connection and splicing between the adjacent frame segments 1, and further ensuring the structural stability and reliability of the membrane electrode frame 10.

[0055] It can be understood that when the one side of the limiting portion 15 facing the inserting portion 13 (i.e. the one side of the limiting portion 15 facing the inserting slot 14) is formed with the limiting protrusion 16, correspondingly, the one side of the inserting portion 13 facing the limiting portion 15 is formed with the limiting groove 17; when the one side of the limiting portion 15 facing the inserting portion 13 (i.e. the one side of the limiting portion 15 facing the inserting slot 14) is formed with the limiting groove 17, correspondingly, the one side of the inserting portion 13 facing the limiting portion 15 is formed with the limiting protrusion 16.

[0056] It is worth noting that under the action of gas pressure, the insertion position of the adjacent frame segment 1 (i.e. the insertion portion 13 and the limiting portion 15) may be deformed, which can be caused by the direct action of gas pressure on the limiting portion 15 and the insertion portion 13, or the deformation of the area between the two ends of the frame segment 1 under the action of gas pressure, which drives the insertion position of the adjacent frame segment 1 to deform. When the insertion position of the adjacent frame segment 1 deforms, the insertion portion 13 and the limiting portion 15 will move relatively, which will affect the structural stability of the membrane electrode frame 10 and cause the deformation or even the breakage of the integrated sealing rubber body formed by injecting rubber into the whole rubber groove formed by the communication of the rubber grooves 12 of the several frame segments 1, which will affect the sealing performance of the single cell.

[0057] In the embodiment, the nesting of the limiting protrusion 16 and the limiting groove 17 limits the relative movement of the limiting portion 15 and the insertion portion 13, thereby reducing the risk of deformation of the insertion position of the adjacent frame segment 1, improving the stability of the overall structure of the membrane electrode frame 10, and ensuring the sealing effect of the single cell.

[0058] Further, in one embodiment, as shown in Figures 1 to 5 Fig. 2, along the connecting direction of the adjacent two frame segments 1, the limiting protrusion 16 is sequentially provided with a plurality of limiting protrusions, and correspondingly, the limiting groove 17 is also provided with a plurality of limiting grooves, and the plurality of limiting protrusions 16 and the plurality of limiting grooves 17 are one-to-one corresponding. The limiting protrusion 16 and the limiting groove 17 are matched and arranged as a plurality of limiting protrusions and limiting grooves, which improves the connection strength of the insertion portion 13 and the limiting portion 15.

[0059] It is worth noting that the plurality of limiting protrusions 16 and the plurality of limiting grooves 17 can form a zigzag joint structure, or a wave-shaped joint structure, or a mortise and tenon joint structure.

[0060] Further, in one embodiment, the limiting groove 17 is arranged through the thickness direction, and the limiting protrusion 16 is arranged along the thickness direction to match the limiting groove 17. By arranging the limiting groove 17 and the limiting protrusion 16 along the whole thickness direction, the matching assembly of the inserting part 13 and the limiting part 15 is facilitated, the limiting effect of the limiting groove 17 and the limiting protrusion 16 is improved, and the connecting strength of the inserting part 13 and the limiting part 15 is improved.

[0061] As shown in the examples, Figure 3 and Figure 5 the limiting part 15 is formed with the limiting groove 17 on the side facing the inserting part 13, and correspondingly, the inserting part 13 is formed with the limiting protrusion 16 on the side facing the limiting part 15. The limiting groove 17 is arranged through the limiting part 15 along the thickness direction, that is, the limiting groove 17 is arranged along the whole thickness direction of the limiting part 15, and correspondingly, the limiting protrusion 16 is arranged along the whole thickness direction of the inserting part 13.

[0062] It should be noted that when the two frame segments 1 are matched and assembled, the inserting part 13 is arranged opposite to the inserting groove 14 along the thickness direction (that is, the direction perpendicular to the plane in Figure 1 the middle), and then the two frame segments 1 are moved to approach each other along the thickness direction, so that the inserting part 13 is inserted into the inserting groove 14 and the limiting protrusion is inserted into the limiting groove 17. Therefore, in combination with the above, it can be understood that the matching and assembling direction (that is, the thickness direction) of the two adjacent frame segments 1 is perpendicular to the direction of the gas pressure, so that the matching and assembling of the two adjacent frame segments 1 under the action of the gas pressure is avoided.

[0063] In one embodiment, as shown in the examples, Figure 1 the first surface 11 of at least one frame segment 1 is formed with the glue injection port 18, and the glue injection port 18 is arranged in communication with the sealing glue groove 12; further, the first surface 11 of each frame segment 1 is formed with at least one glue discharge port 19, and the glue discharge port 19 is arranged in communication with the sealing glue groove 12. In this way, after the sealing glue grooves 12 of the frame segments 1 are connected to form a whole glue groove, the glue injection port 18 is used to inject glue into the glue groove, and further, the glue discharge port 19 of each frame segment 1 is used to discharge air during the glue injection process, which is beneficial to improve the glue injection rate and can ensure that each sealing glue groove 12 is filled with glue and the excess glue is discharged through the glue discharge port 19, thereby forming a complete and continuous sealing glue.

[0064] In one embodiment, as shown in the examples, Figures 1 to 5As shown, the plurality of frame segments 1 include two end segments 3 and a plurality of intermediate segments 4, the two end segments 3 are oppositely arranged along the length direction, and the plurality of intermediate segments 4 are connected between the two end segments 3. By using the two end segments 3 and the plurality of intermediate segments 4, the frame structure with the central chamber 2 can be formed.

[0065] Therefore, in combination with the above, it can be understood that, in the embodiment, as Figure 1 As shown, the connection direction of the adjacent two frame segments 1 is the length direction, and the direction perpendicular to the thickness direction and the connection direction (length direction) of the adjacent two frame segments 1 is the width direction.

[0066] It is worth noting that, between the two ends of the two end segments 3 oppositely arranged along the length direction, one intermediate segment 4 can be arranged (see Figure 1 ), or a plurality of intermediate segments 4 can be arranged and the plurality of intermediate segments 4 are arranged in a plug-in manner.

[0067] It is worth noting that the end segment 3 is approximately in the shape of a "Fang" character, and the intermediate segment 4 is approximately in the shape of a "Yi" character.

[0068] Of course, in other alternative embodiments, the size and shape of each frame segment 1 can be designed according to actual needs.

[0069] In one embodiment, as Figure 3 and Figure 4 As shown, the end segment 3 is provided with a hydrogen flow passage 31 through the thickness direction, the end segment 3 is provided with a hydrogen duct 32, and the hydrogen flow passage 31 is communicated with the central chamber 2 through the hydrogen duct 32. By using the hydrogen duct 32, the hydrogen can flow uniformly between the hydrogen flow passage 31 and the central chamber 2.

[0070] Alternatively, as Figure 3 and Figure 4 As shown, the end segment 3 is provided with an air flow passage 33 through the thickness direction, the end segment 3 is provided with an air duct 34, and the air flow passage 33 is communicated with the central chamber 2 through the air duct 34. By using the air duct 34, the air can flow uniformly between the air flow passage 33 and the central chamber 2.

[0071] It is worth noting that, for the membrane electrode 100, two membrane electrode frames 10 are included, which are an anode side frame and a cathode side frame. Please refer to Figure 3 For the anode side frame, the end segment 3 is provided with the hydrogen flow passage 31 and the hydrogen duct 32; please refer to Figure 4 For the cathode side frame, the end segment 3 is provided with the air flow passage 33 and the air duct 34.

[0072] Further, please refer to Figure 1 The hydrogen flow passage 31 comprises a hydrogen inflow passage 311 and a hydrogen outflow passage 312, which are arranged at the two end sections 3 respectively. The hydrogen inflow passage 311 is communicated with the central chamber 2 through a hydrogen inflow duct 321, and the hydrogen outflow passage 312 is communicated with the central chamber 2 through a hydrogen outflow duct 322. Therefore, the hydrogen in the hydrogen inflow passage 311 flows into the central chamber 2 uniformly through the hydrogen inflow duct 321, and the hydrogen in the central chamber 2 flows out to the hydrogen outflow passage 312 uniformly through the hydrogen outflow duct 322.

[0073] Further, please refer to Figure 2 The air flow passage 33 comprises an air inflow passage 331 and an air outflow passage 332, which are arranged at the two end sections 3 respectively. The air inflow passage 331 is communicated with the central chamber 2 through an air inflow duct 341, and the air outflow passage 332 is communicated with the central chamber 2 through an air outflow duct 342. Therefore, the air in the air inflow passage 331 flows into the central chamber 2 uniformly through the air inflow duct 341, and the air in the central chamber 2 flows out to the air outflow passage 332 uniformly through the air outflow duct 342.

[0074] It should be noted that, please refer to Figure 3 and Figure 4 The hydrogen flow passage 31 and the air flow passage 33 can be arranged at one end section 3 simultaneously, but one of the two flow passages is communicated with the central chamber 2 through the duct, and the other is communicated with the central chamber 2 through the sealing groove 12. Therefore, please refer to Figure 1 When the membrane electrode frame 10 is used as the anode side frame, the flow passage corresponding to the duct is the hydrogen flow passage 31, and the flow passage corresponding to the sealing groove 12 is the air flow passage 33. Please refer to Figure 2 When the membrane electrode frame 10 is used as the cathode side frame, the flow passage corresponding to the duct is the air flow passage 33, and the flow passage corresponding to the sealing groove 12 is the hydrogen flow passage 31.

[0075] It should be further noted that, when the sealing groove 12 is arranged between the flow passage and the central chamber 2, the flow passage and the central chamber 2 can be sealed after the sealing groove is filled with glue.

[0076] In one embodiment, as shown in Figure 3 and Figure 4 The end section 3 is provided with a cooling water flow passage 35 along the thickness direction. The cooling water flows in the cooling water flow passage 35 to take away the heat generated by the reaction.

[0077] Specifically, as shown in Figure 1 and Figure 2 The cooling water flow channel 35 includes a cooling water inflow channel 351 and a cooling water outflow channel 352, which are arranged at the two end sections 3. On one end section 3, the cooling water flow channel 35 can be arranged between the hydrogen gas flow channel 31 and the air flow channel 33.

[0078] Further, as shown in Figures 1 to 4 The cooling water flow channel 35 and the hydrogen gas flow channel 31, the cooling water flow channel 35 and the air flow channel 33, and the cooling water flow channel 35 and the center chamber 2 are all provided with the sealing glue groove 12. Therefore, after glue injection, the sealing between the cooling water flow channel 35 and the hydrogen gas flow channel 31, the cooling water flow channel 35 and the air flow channel 33, and the cooling water flow channel 35 and the center chamber 2 can be realized.

[0079] In this embodiment, a membrane electrode 100 is also provided, which includes a proton exchange membrane and the above-mentioned membrane electrode frame 10. Two membrane electrode frames 10 are arranged at opposite sides of the proton exchange membrane, and the first surface 11 faces away from the proton exchange membrane.

[0080] It is worth noting that, as mentioned above, the two membrane electrode frames 10 are respectively an anode side frame and a cathode side frame.

[0081] It is worth noting that the proton exchange membrane is connected to the membrane electrode frame 10 by hot pressing.

[0082] In this embodiment, a single cell is also provided, which includes an anode plate 200, a cathode plate 300, and the above-mentioned membrane electrode 100. The anode plate 200 and the cathode plate 300 are arranged at opposite sides of the membrane electrode 100 and are attached to the first surface 11, so that the sealing glue grooves 12 of the plurality of frame sections 1 form glue injection channels, and the glue injection channels are provided with glue to bond the anode plate 200 and the membrane electrode 100 and the cathode plate 300 and the membrane electrode 100.

[0083] It is worth noting that, as shown in Figure 6 The anode plate 200, the membrane electrode 100, and the cathode plate 300 are stacked in sequence to form an assembly by using positioning columns, and then the assembly is placed into a packaging mold for integrated glue injection. A hydrogen cavity sealing ring 400 is formed in the glue injection channel between the anode plate 200 and the membrane electrode 100, an air cavity sealing ring 500 is formed in the glue injection channel between the cathode plate 300 and the membrane electrode 100, and a water cavity sealing ring 600 is formed on the side of the cathode plate 300 away from the membrane electrode 100, that is, the hydrogen cavity sealing ring 400, the air cavity sealing ring 500, and the water cavity sealing ring 600 are integrally formed. Thus, the integrated packaging of the single cell is realized.

[0084] It should be noted that the anode plate 200 and the central cavity of the anode side frame form an anode flow field, and the cathode plate 300 and the central cavity of the cathode side frame form a cathode flow field.

[0085] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or transformations made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A membrane electrode frame, characterized in that: include: A frame segment (1) is provided with a plurality of segments, each of the frame segments (1) having two ends, a sealing adhesive groove (12) being provided on a first surface (11) along a thickness direction of the frame segment (1), the plurality of frame segments (1) being sequentially connected along a circumferential direction to enclose a central chamber (2), and the sealing adhesive grooves (12) of two adjacent frame segments (1) being connected, and the two adjacent ends of the two adjacent frame segments (1) being plugged into each other.

2. The membrane electrode frame according to claim 1, characterized in that: Among the two end portions of two adjacent frame segments (1) that are close to each other, one of the end portions has a plug-in portion (13), and the other end portion has a slot (14) and limiting portions (15) are formed on opposite sides of the slot (14), and the plug-in portion (13) is inserted into the slot (14); in a direction perpendicular to both the thickness direction and the connection direction of the two adjacent frame segments (1), the plug-in portion (13) is sandwiched between the two limiting portions (15).

3. The membrane electrode frame according to claim 2, characterized in that: The two oppositely arranged surfaces of the plug-in portion (13) and the limiting portion (15) are nested through a limiting protrusion (16) and a limiting groove (17); the limiting protrusion (16) is formed on one of the two oppositely arranged surfaces of the plug-in portion (13) and the limiting portion (15); and the limiting groove (17) is formed on the other of the two oppositely arranged surfaces of the plug-in portion (13) and the limiting portion (15).

4. The membrane electrode frame according to claim 3, characterized in that: Along the connection direction of two adjacent frame segments (1), a plurality of the limiting protrusions (16) are sequentially provided, and correspondingly, a plurality of the limiting grooves (17) are also provided, and the plurality of the limiting protrusions (16) and the plurality of the limiting grooves (17) are provided in a one-to-one correspondence; and / or, The limiting groove (17) is provided through-through in the thickness direction, and the limiting protrusion (16) is provided extending in the thickness direction to be adapted to the limiting groove (17).

5. The membrane electrode frame according to any one of claims 1 to 4, characterized in that: The first surface (11) of at least one of the frame segments (1) is formed with a glue injection port (18), and the glue injection port (18) is connected to the sealant groove (12); and / or, The first surface (11) of each frame segment (1) is formed with at least one glue discharge port (19), and the glue discharge port (19) is connected to the sealing glue groove (12).

6. The membrane electrode frame according to any one of claims 1 to 4, characterized in that: The plurality of frame segments (1) include two end segments (3) and a plurality of middle segments (4); the two end segments (3) are arranged at intervals along the length direction; and the plurality of middle segments (4) are connected between the two end segments (3).

7. The membrane electrode frame according to claim 6, characterized in that: The end section (3) is provided with a hydrogen flow channel (31) along the thickness direction, the end section (3) is provided with a hydrogen duct (32), and the hydrogen flow channel (31) is connected to the central chamber (2) through the hydrogen duct (32); or, The end section (3) is provided with an air circulation channel (33) along the thickness direction, and the end section (3) is provided with an air duct (34). The air circulation channel (33) is communicated with the central chamber (2) through the air duct (34).

8. The membrane electrode frame according to claim 6, characterized in that: The end segment (3) is provided with a cooling water circulation channel (35) extending through the end segment (3) in the thickness direction.

9. A membrane electrode, characterized in that include: Proton exchange membrane; The membrane electrode frame (10) according to any one of claims 1 to 8, wherein two membrane electrode frames (10) are provided, the two membrane electrode frames (10) are provided on opposite sides of the proton exchange membrane, and the first surface (11) is provided away from the proton exchange membrane.

10. A single battery, characterized in that: include: An anode plate (200), a cathode plate (300) and a membrane electrode (100) as claimed in claim 9, wherein the anode plate (200) and the cathode plate (300) are arranged on opposite sides of the membrane electrode (100) and are arranged in contact with the first surface (11), so that the sealing glue grooves (12) of several sections of the frame segments (1) form a glue injection channel, and a colloid is arranged in the glue injection channel to bond the anode plate (200) and the membrane electrode (100), and the cathode plate (300) and the membrane electrode (100).

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