Hot-pressing edge sealing device for high-temperature membrane electrode

Abstract

The utility model belongs to the technical field of hot-pressing edge sealing, and particularly relates to a high-temperature membrane electrode hot-pressing edge sealing device which comprises a high-temperature membrane electrode hot-pressing machine, a hot-pressing edge sealing assembly is arranged in the high-temperature membrane electrode hot-pressing machine, and a buffering assembly is installed at the bottom of the hot-pressing edge sealing assembly. A bottom plate mounting assembly is arranged at the bottom of the buffer assembly; the hot-pressing edge sealing assembly comprises a lower mold, the side of the lower mold is electrically connected with a heating rod connector, the outer wall of the lower mold is electrically connected with a thermocouple connector, the top of the lower mold is fixedly connected with a tool limiting rod, the top of the tool limiting rod is connected with an upper mold in a clamped mode, and the top of the upper mold is provided with an upper heat insulation block. According to the hot-pressing edge sealing tool for the high-temperature membrane electrode provided by the utility model, the frame can be firmly combined together through a hot-pressing effect, so that the air tightness of an assembled electric pile is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing edge sealing, in particular to a hot pressing edge sealing device for a high-temperature membrane electrode. Background Art

[0002] The membrane electrode assembly, also known as the membrane electrode, is a key core component for fuel cell power generation. The membrane electrode and the bipolar plates on both sides thereof form the basic unit of the fuel cell, the fuel cell single cell; the membrane electrode is composed of a proton exchange membrane and catalyst layers on both sides thereof.

[0003] In Chinese Patent No. 202021927447.0, the utility model discloses a membrane electrode edge sealing device for fuel cells, including a connecting placement plate. A placement cavity is opened inside the connecting placement plate. An activity bracket is movably installed inside the connecting placement plate. One side of the activity bracket is fixedly installed with a pressing plate. A guiding plate is placed on the surface of the outer wall of the connecting placement plate. A guiding hole is opened inside the guiding plate. One side of the connecting placement plate is fixedly installed with a limiting rod. A connecting nut is movably sleeved on the surface of the outer wall of the limiting rod; through the designed activity bracket and pressing plate, during the movement, the activity bracket will move along the surface of the outer wall of the activity rod. During the movement, the activity spring movably sleeved on the outer wall of the activity rod will be extruded. When the activity spring is extruded, a rebounding force will be formed to push the pressing plate outwards. At this time, a clamping force is formed on the material placed in the middle by the pressing plates on both sides, solving the problem.

[0004] For the existing membrane electrodes, the CCM method or the method of matching the hot press with tooling fixtures has been used to achieve the large-scale production of membrane electrodes. However, in view of the matching design between the frame of the membrane electrode and the bipolar plate during use, generally, the frame of the membrane electrode is not hot pressed, that is, the cathode and anode frames of the membrane electrode are separated. The separation of the cathode and anode frames will cause hydrogen leakage at the hydrogen inlet. It is very difficult to ensure the airtightness of the fuel cell stack after assembling. If the conventional membrane electrode hot pressing tooling is used to perform secondary hot pressing on the membrane electrode, the high temperature may cause the performance of the membrane electrode to decline.

[0005] Therefore, a hot pressing edge sealing device for a high-temperature membrane electrode is proposed for the above problems. Summary of the Utility Model

[0006] In order to make up for the deficiencies of the prior art, the problem of hydrogen leakage at the hydrogen inlet is solved, and the problem of poor airtightness of the assembled fuel cell stack is solved.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A high-temperature membrane electrode hot pressing and edge sealing device described in the present utility model includes a high-temperature membrane electrode hot press. A hot pressing and edge sealing assembly is arranged inside the high-temperature membrane electrode hot press, a buffer assembly is installed at the bottom of the hot pressing and edge sealing assembly, and a bottom plate installation assembly is arranged at the bottom of the buffer assembly; The hot pressing and edge sealing assembly includes a lower mold. A heating rod connector is electrically connected to the side of the lower mold, a thermocouple connector is electrically connected to the outer wall of the lower mold, and a tooling limiting rod is fixedly connected to the top of the lower mold. The top of the tooling limiting rod is snap-fitted with an upper mold, an upper heat insulation block is arranged at the top of the upper mold, and a handheld plate body is closely attached to the top of the upper heat insulation block. A handheld handle is arranged on the side of the handheld plate body, and a handheld plate fixing screw is threadedly connected inside the handheld plate body.

[0008] Preferably, the upper mold and the lower mold form a snap-fitting structure through the tooling limiting rod, and a pair of tooling limiting rods are symmetrically arranged about the vertical central axis of the lower mold.

[0009] Preferably, the handheld plate fixing screw and the upper heat insulation block form a thread-detachable structure through the handheld plate body, and the handheld handle is made of rubber material.

[0010] Preferably, the buffer assembly includes a buffer layer. A magic tape sub-piece is fixedly connected to the bottom of the buffer layer, and a magic tape mother-piece is arranged at the bottom of the magic tape sub-piece.

[0011] Preferably, the buffer layer and the magic tape mother-piece form a detachable structure through the magic tape sub-piece, and a pair of buffer layers are symmetrically arranged about the vertical central axis of the lower mold.

[0012] Preferably, the bottom plate installation assembly includes an installation bottom plate. An installation bolt is threadedly connected inside the installation bottom plate, a heat insulation block limiting clamp is fixedly connected to the top of the installation bottom plate, and a lower heat insulation block is snap-fitted inside the heat insulation block limiting clamp.

[0013] Preferably, the installation bolt and the high-temperature membrane electrode hot press form a thread-detachable structure through the installation bottom plate, and the lower heat insulation block and the installation bottom plate form a snap-fitting structure through the heat insulation block limiting clamp.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. The upper mold and the lower mold form a snap-fitting structure through the tooling limiting rod, and a pair of tooling limiting rods are symmetrically arranged about the vertical central axis of the lower mold. The handheld plate fixing screw and the upper heat insulation block form a thread-detachable structure through the handheld plate body, and the handheld handle is made of rubber material, which is convenient for the frame to be firmly combined together through the hot pressing effect, thereby ensuring the airtightness of the assembled stack. At the same time, through the handheld handle, it is convenient for the staff to operate the device;

[0016] 2. The buffer layer is a detachable structure formed by a hook-and-loop fastener and a loop-and-loop fastener, and a pair of buffer layers are symmetrically arranged about the vertical central axis of the lower mold, which is convenient for providing buffering between the lower mold and the lower heat insulation block and effectively protecting the internal parts of the device;

[0017] 3. The mounting bolt forms a threaded detachable structure with the high-temperature film electrode hot pressing mechanism through the mounting base plate, and the lower heat insulation block forms a clamping structure with the mounting base plate through the heat insulation block limit card, which is convenient for installing the mounting base plate inside the high-temperature film electrode hot press, and at the same time is beneficial to limiting the lower heat insulation block and effectively ensuring the stability of the device. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the high-temperature film electrode hot pressing and edge-sealing device of the present invention;

[0020] Figure 2 It is an enlarged structural schematic diagram of the high-temperature film electrode hot press of the present invention;

[0021] Figure 3 It is a disassembly structural schematic diagram of the hot pressing and edge-sealing assembly of the present invention;

[0022] Figure 4 It is an installation structural schematic diagram of the buffer assembly of the present invention;

[0023] Figure 5 It is an enlarged structural schematic diagram of the buffer assembly of the present invention;

[0024] Figure 6 It is an enlarged structural schematic diagram of the bottom plate installation assembly of the present invention.

[0025] In the figure: 1. High-temperature film electrode hot press; 2. Hot pressing and edge-sealing assembly; 201. Lower mold; 202. Heating rod joint; 203. Thermocouple joint; 204. Tooling limit rod; 205. Upper mold; 206. Upper heat insulation block; 207. Main body of the hand-held plate; 208. Hand-held handle; 209. Hand-held plate fixing screw; 3. Buffer assembly; 301. Buffer layer; 302. Hook-and-loop fastener; 303. Loop-and-loop fastener; 4. Bottom plate installation assembly; 401. Installation base plate; 402. Mounting bolt; 403. Heat insulation block limit card; 404. Lower heat insulation block. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0027] As Figure 1 、 Figure 2 shown, a hot pressing edge sealing device for a high-temperature membrane electrode includes a hot pressing machine 1 for a high-temperature membrane electrode. A hot pressing edge sealing assembly 2 is arranged inside the hot pressing machine 1 for a high-temperature membrane electrode. A buffer assembly 3 is installed at the bottom of the hot pressing edge sealing assembly 2, and a bottom plate mounting assembly 4 is arranged at the bottom of the buffer assembly 3.

[0028] As Figure 3 shown, a hot pressing edge sealing device for a high-temperature membrane electrode, the hot pressing edge sealing assembly 2 includes a lower mold 201. A heating rod joint 202 is electrically connected to the side of the lower mold 201, and a thermocouple joint 203 is electrically connected to the outer wall of the lower mold 201. A tooling limit rod 204 is fixedly connected to the top of the lower mold 201. An upper mold 205 is snap-connected to the top of the tooling limit rod 204. An upper heat insulation block 206 is arranged at the top of the upper mold 205, and a handheld plate main body 207 is closely attached to the top of the upper heat insulation block 206. A handheld handle 208 is arranged on the side of the handheld plate main body 207, and a handheld plate fixing screw 209 is threadedly connected to the inside of the handheld plate main body 207. The upper mold 205 is installed with the lower mold 201 through the tooling limit rod 204. The heating rod joint 202 is used to connect the heating rod, and the thermocouple joint 203 is used to connect the thermocouple. The thermocouple exists on the side of the lower mold 201. Then, the handheld plate main body 207 is installed using the handheld plate fixing screw 209. The handheld handle 208 is made of rubber. Rubber refers to a highly elastic polymer with reversible deformation and has good anti-slip properties, facilitating the staff to hold the handheld handle 208 to control the device, facilitating the hot pressing effect, enabling the frame to be firmly combined together, thereby ensuring the airtightness of the assembled fuel cell stack. At the same time, through the handheld handle 208, it is convenient for the staff to operate the device.

[0029] As Figure 4 、 Figure 5As shown in the figure, a hot press edge-sealing device for high-temperature membrane electrodes, a buffer assembly 3, includes a buffer layer 301. A magic tape sub-patch 302 is fixedly connected to the bottom of the buffer layer 301, and a magic tape mother-patch 303 is arranged at the bottom of the magic tape sub-patch 302. The buffer layer 301 forms a detachable structure through the magic tape sub-patch 302 and the magic tape mother-patch 303, and a pair of buffer layers 301 are symmetrically arranged about the vertical central axis of the lower mold 201. When installing the buffer layer 301, through the adhesive structure between the magic tape sub-patch 302 and the magic tape mother-patch 303, the buffer layer 301 is fixed, which is convenient for providing buffering between the lower mold 201 and the lower heat insulation block 404 and effectively protecting the internal parts of the device.

[0030] As Figure 6 As shown in the figure, a hot press edge-sealing device for high-temperature membrane electrodes, a bottom plate installation assembly 4, includes an installation bottom plate 401. An installation bolt 402 is threadedly connected to the inside of the installation bottom plate 401, and a heat insulation block limit card 403 is fixedly connected to the top of the installation bottom plate 401. And a lower heat insulation block 404 is snap-fitted inside the heat insulation block limit card 403. Place the installation bottom plate 401 inside the high-temperature membrane electrode hot press 1 and install it using the installation bolt 402. Then, snap the lower heat insulation block 404 inside the heat insulation block limit card 403 to ensure the stability of the lower heat insulation block 404, which is convenient for installing the installation bottom plate 401 inside the high-temperature membrane electrode hot press 1. At the same time, it is beneficial to limit the lower heat insulation block 404 and effectively ensure the stability of the device.

[0031] Working principle: First, when installing the device, place the installation bottom plate 401 inside the high-temperature membrane electrode hot press 1 and install it using the installation bolt 402. Then, snap the lower heat insulation block 404 inside the heat insulation block limit card 403 to ensure the stability of the lower heat insulation block 404. Next, install the buffer layer 301. Through the adhesive structure between the magic tape sub-patch 302 and the magic tape mother-patch 303, the buffer layer 301 is fixed to provide a buffering effect between the lower heat insulation block 404 and the lower mold 201 and ensure the safety between parts. Next, install the upper mold 205 and the lower mold 201 through the tooling limit rod 204. The heating rod connector 202 is used to connect the heating rod, and the thermocouple connector 203 is used to connect the thermocouple. The thermocouple is located on the side of the lower mold 201. Then, use the hand-held plate fixing screw 209 to install the hand-held plate main body 207. The hand-held handle 208 is made of rubber. Rubber refers to a highly elastic polymer with reversible deformation and has good anti-slip properties, which is convenient for the staff to hold the hand-held handle 208 to control the device.

[0032] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A high-temperature membrane electrode hot pressing edge sealing device, characterized in that: The invention comprises a high-temperature membrane electrode hot press (1), wherein a hot pressing edge sealing component (2) is arranged inside the high-temperature membrane electrode hot press (1), a buffer component (3) is installed at the bottom of the hot pressing edge sealing component (2), and a bottom plate mounting component (4) is arranged at the bottom of the buffer component (3); The hot pressing edge sealing assembly (2) comprises a lower mold (201), the side of the lower mold (201) is electrically connected to a heating rod joint (202), and the outer wall of the lower mold (201) is electrically connected to a thermocouple joint (203), and the top of the lower mold (201) is fixedly connected to a tooling limit rod (204), the top of the tooling limit rod (204) is snap-connected to an upper mold (205), and the top of the upper mold (205) is provided with an upper insulation block (206), and the top of the upper insulation block (206) is tightly fitted with a handheld plate body (207), the side of the handheld plate body (207) is provided with a handheld handle (208), and the internal thread of the handheld plate body (207) is connected to a handheld plate fixing screw (209).

2. A high-temperature membrane electrode hot-pressing edge sealing device according to claim 1, characterized in that: The upper mold (205) forms a clamping structure with the lower mold (201) through a tooling limiting rod (204), and a pair of tooling limiting rods (204) are symmetrically arranged about the vertical center axis of the lower mold (201).

3. A high-temperature membrane electrode hot-pressing edge sealing device according to claim 1, characterized in that: The hand-held plate fixing screw (209) forms a threaded detachable structure through the hand-held plate body (207) and the upper heat insulation block (206), and the hand-held handle (208) is made of rubber.

4. A high-temperature membrane electrode hot-pressing edge sealing device according to claim 1, characterized in that: The buffer component (3) comprises a buffer layer (301), the bottom of the buffer layer (301) is fixedly connected with a Velcro sub-tie (302), and the bottom of the Velcro sub-tie (302) is provided with a Velcro mother-tie (303).

5. A high-temperature membrane electrode hot-pressing edge sealing device according to claim 4, characterized in that: The buffer layer (301) forms a detachable structure through the Velcro sub-strip (302) and the Velcro mother-strip (303), and a pair of buffer layers (301) are symmetrically arranged about the vertical center axis of the lower mold (201).

6. The high-temperature membrane electrode hot-pressing edge sealing device according to claim 1, characterized in that: The base plate mounting assembly (4) comprises a mounting base plate (401), the internal thread of the mounting base plate (401) being connected with mounting bolts (402), the top of the mounting base plate (401) being fixedly connected with a heat insulation block limit card (403), and the interior of the heat insulation block limit card (403) being connected with a lower heat insulation block (404) by snap-fitting.

7. A high-temperature membrane electrode hot-pressing edge sealing device according to claim 6, characterized in that: The mounting bolts (402) form a threaded detachable structure with the high-temperature membrane electrode hot press (1) via the mounting base plate (401), and the lower heat insulation block (404) forms a snap-fit ​​structure with the mounting base plate (401) via the heat insulation block limiter (403).

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