A fuel cell

Abstract

The utility model relates to a kind of fuel cell, including battery cover plate, polar plate group and fixed silk, the middle part of polar plate group is provided with diffusion layer group, catalytic layer and proton exchange membrane, catalytic layer is arranged in the two sides of proton exchange membrane, diffusion layer group is arranged in the two sides of catalytic layer, diffusion layer group includes diffusion base layer, separate guide pad layer, protective edge, separate guide pad layer is arranged in the outer surface of diffusion base layer one end.The diffusion layer group in the utility model can diffuse gas in advance through separate guide pad layer when using, can improve the diffusion efficiency and effect of gas in diffusion base layer, can guarantee that gas diffuses fully and completes catalysis with catalytic layer, protective edge can play protective effect between diffusion layer group and polar plate group when using, improve the sealing effect between diffusion layer group and polar plate group under improving the compression resistance of diffusion layer group, can avoid wear and tear between diffusion layer group and polar plate group, affect the use effect of diffusion layer group.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a fuel cell. Background Technology

[0002] A fuel cell is a device that directly converts the chemical energy of fuel (such as hydrogen, methanol, natural gas, etc.) and oxidant (such as oxygen, air) into electrical energy. Its core feature is that "energy conversion does not require combustion", skipping the multi-step conversion process of traditional heat engines "chemical energy → thermal energy → mechanical energy → electrical energy", thus having significant advantages of high efficiency, cleanliness and low noise. As an important component of fuel cells, membrane electrode assembly (MEA) mainly consists of electrode plates, diffusion layers, catalyst layers, and proton exchange membranes. The diffusion layer is mainly used for gas uniformity and water management balance, but existing gas diffusion layers have certain inconveniences in use. Existing gas diffusion layers have low gas diffusion efficiency during use. Due to the limited structural area of ​​the diffusion layer, the gas cannot diffuse effectively and quickly when passing through the diffusion layer. In addition, the diffusion layer is in contact with the electrode plate during use, and is easily deformed by compression during long-term use, which will affect the performance of the diffusion layer during use. Therefore, we propose a fuel cell. Utility Model Content

[0003] In view of the technical problems in the prior art, the existing gas diffusion layer has low gas diffusion efficiency during use. Due to the limited structural area of ​​the diffusion layer, the gas cannot diffuse effectively and quickly when passing through the diffusion layer. In addition, the diffusion layer is in contact with the electrode plate during use and is easily deformed by compression during long-term use, which affects the performance of the diffusion layer. This utility model provides a fuel cell.

[0004] The technical solution adopted by this utility model is as follows: a fuel cell, including a battery cover plate, an electrode assembly, and a fixing wire. A diffusion layer assembly, a catalyst layer, and a proton exchange membrane are disposed in the middle of the electrode assembly. The catalyst layer is disposed on both sides of the proton exchange membrane. The diffusion layer assembly is disposed on both sides of the catalyst layer. The diffusion layer assembly includes a diffusion base layer, a distribution pad layer, and a protective edge. The distribution pad layer is disposed on the outer surface of one end of the diffusion base layer. The protective edge is disposed on the outer surface of one end of the distribution pad layer. The distribution pad layer includes a distribution base layer, an inlet channel, a dispersion channel, and a dispersion baffle. The inlet channel and the dispersion channel are both disposed in the middle of the distribution base layer, and the distribution base layer is disposed in the middle of the dispersion channel.

[0005] Furthermore, the protective edge includes an edge strip, a cavity, an airbag strip, and a sealing soft edge. The cavity is located in the middle of the edge strip, and both the airbag strip and the sealing soft edge are located in the middle of the cavity. The sealing soft edge is located on both sides of the airbag strip.

[0006] Furthermore, the electrode assembly includes a positive electrode and a negative electrode.

[0007] Furthermore, the sub-guide base layer is integrally formed with the inlet channel and the dispersing channel, and the inlet channel and the dispersing channel are interconnected.

[0008] Furthermore, the outer surfaces at both ends of the airbag strip are fixedly connected to the inner surfaces at both ends of the edge strip.

[0009] Furthermore, the edge strip and the sealing soft edge are integrally formed.

[0010] The beneficial effects of this utility model are: In this invention, the diffusion layer assembly can pre-diffuse the gas through the guide pad layer during use, which can improve the diffusion efficiency and effect of the gas in the diffusion base layer, and ensure that the gas diffuses fully and completes catalysis with the catalytic layer. The protective edge can play a protective role between the diffusion layer assembly and the electrode assembly during use. While improving the pressure resistance of the diffusion layer assembly, it can also improve the sealing effect between the diffusion layer assembly and the electrode assembly, and avoid wear between the diffusion layer assembly and the electrode assembly, which would affect the performance of the diffusion layer assembly. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the electrode plate assembly of this utility model; Figure 3 This is a structural diagram of the diffusion layer assembly of this utility model; Figure 4 This is a structural diagram of the diffusion base layer of this utility model; Figure 5 This is a structural diagram of the diffusion base layer of this utility model.

[0012] The markings in the diagram are as follows: 1. Battery cover plate; 2. Electrode plate assembly; 3. Fixing wire; 4. Diffusion layer assembly; 41. Diffusion base layer; 42. Conductive pad layer; 421. Conductive base layer; 422. Inlet channel; 423. Dispersion channel; 424. Dispersion block; 43. Protective edge; 431. Edge strip; 432. Cavity; 433. Airbag strip; 434. Sealing soft edge; 5. Catalytic layer; 6. Proton exchange membrane. Detailed Implementation

[0013] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] The following is in conjunction with the appendix Figures 1-5 The present invention will be further described below.

[0016] To address the problems existing in the background technology, this application proposes the following technical solution: a fuel cell.

[0017] The specific technical solution includes a battery cover plate 1, an electrode assembly 2, and a fixing wire 3. A diffusion layer assembly 4, a catalyst layer 5, and a proton exchange membrane 6 are disposed in the middle of the electrode assembly 2. The catalyst layer 5 is disposed on both sides of the proton exchange membrane 6, and the diffusion layer assembly 4 is disposed on both sides of the catalyst layer 5. The diffusion layer assembly 4 includes a diffusion base layer 41, a distribution pad layer 42, and a protective edge 43. The distribution pad layer 42 is disposed on the outer surface of one end of the diffusion base layer 41, and the protective edge 43 is disposed on the outer surface of one end of the distribution pad layer 42. The distribution pad layer 42 includes a distribution base layer 421, an inlet channel 422, a dispersion channel 423, and a dispersion baffle 424. The inlet channel 422 and the dispersion channel 423 are both disposed in the middle of the distribution base layer 421, and the distribution base layer 421 is disposed in the middle of the dispersion channel 423. The protective edge 43 includes a side strip 431. The diffuser assembly 4 consists of a cavity 432, an airbag strip 433, and a sealing soft edge 434. The cavity 432 is located in the middle of the edge strip 431, and both the airbag strip 433 and the sealing soft edge 434 are located in the middle of the cavity 432. The sealing soft edge 434 is located on both sides of the airbag strip 433. When in use, the diffuser assembly 4 can pre-diffuse the gas through the guide pad layer 42, which can improve the diffusion efficiency and effect of the gas in the diffuser base layer 41, and ensure that the gas can fully diffuse and complete the catalysis with the catalytic layer 5. When in use, the protective edge 43 can play a protective role between the diffuser assembly 4 and the electrode assembly 2. While improving the pressure resistance of the diffuser assembly 4, it can also improve the sealing effect between the diffuser assembly 4 and the electrode assembly 2, which can prevent wear between the diffuser assembly 4 and the electrode assembly 2 and affect the use effect of the diffuser assembly 4.

[0018] Furthermore, the electrode assembly 2 includes a positive electrode and a negative electrode, which encapsulate the diffusion layer assembly 4, the catalyst layer 5, and the proton exchange membrane 6 to form a complete battery cell.

[0019] Furthermore, the base layer 421 is integrally formed with the inlet channel 422 and the dispersion channel 423. The inlet channel 422 and the dispersion channel 423 are interconnected structures, and the inlet channel 422 and the dispersion channel 423 are mainly used for introducing and diffusing gas.

[0020] Furthermore, the outer surfaces of both ends of the airbag strip 433 are fixedly connected to the inner surfaces of both ends of the side strip 431. The airbag strip 433 in the side strip 431 can play a pressure-resistant role. When the side strip 431 is compressed, the airbag strip 433 can also be compressed and expand and contract within the cavity 432.

[0021] Furthermore, the edge strip 431 and the sealing soft edge 434 are integrally formed, and the sealing soft edge 434 can deform accordingly when the edge strip 431 is under pressure.

[0022] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview: During use, the diffusion layer 4 can pre-diffuse the gas through the guide pad 42, which can improve the diffusion efficiency and effect of the gas in the diffusion base layer 41, and ensure that the gas diffuses fully and completes catalysis with the catalytic layer 5. The protective edge 43 can provide protection between the diffusion layer 4 and the electrode group 2 during use. While improving the pressure resistance of the diffusion layer 4, it can also improve the sealing effect between the diffusion layer 4 and the electrode group 2, which can prevent wear between the diffusion layer 4 and the electrode group 2 and affect the performance of the diffusion layer 4. During use, the guide pad 42 can introduce the gas through the inlet channel 422 in the guide base layer 421, and then the gas diffuses in the dispersion channel 423 and is evenly diffused by the dispersion baffle 424, which can improve the effect of the gas passing through the diffusion base layer 41. During use, the protective edge 43 can provide pressure resistance through the air bag strip 433 in the cavity 432. When the edge strip 431 is squeezed, the air bag strip 433 will contract and expand, which can buffer the pressure and prevent wear between the diffusion layer 4 and the electrode group 2.

[0023] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0024] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A fuel cell, characterized in that, The battery includes a battery cover (1), an electrode assembly (2), and a fixing wire (3). The electrode assembly (2) has a diffusion layer assembly (4), a catalyst layer (5), and a proton exchange membrane (6) in its center. The catalyst layer (5) is disposed on both sides of the proton exchange membrane (6). The diffusion layer assembly (4) is disposed on both sides of the catalyst layer (5). The diffusion layer assembly (4) includes a diffusion base layer (41), a conductive pad layer (42), and a protective edge (43). The conductive pad layer (42) is disposed on the diffusion base layer. The outer surface of one end of the base layer (41) is provided with the protective edge (43) and the outer surface of one end of the guide pad layer (42). The guide pad layer (42) includes a guide base layer (421), an inlet channel (422), a dispersion channel (423) and a dispersion block (424). The inlet channel (422) and the dispersion channel (423) are both provided in the middle of the guide base layer (421). The guide base layer (421) is provided in the middle of the dispersion channel (423). The protective edge (43) includes an edge strip (431), a cavity (432), an airbag strip (433), and a sealing soft edge (434). The cavity (432) is located in the middle of the edge strip (431). The airbag strip (433) and the sealing soft edge (434) are both located in the middle of the cavity (432). The sealing soft edge (434) is located on both sides of the airbag strip (433). The electrode assembly (2) includes a positive electrode and a negative electrode; The sub-guide base layer (421) is integrally formed with the inlet channel (422) and the dispersing channel (423), and the inlet channel (422) and the dispersing channel (423) are through structures; The outer surfaces of both ends of the airbag strip (433) are fixedly connected to the inner surfaces of both ends of the side strip (431); The edge strip (431) and the sealing soft edge (434) are integrally formed.

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