TWI227573B - Polar plate for fuel cell and fuel cell - Google Patents

Abstract

A polar plate for fuel cell has a gas inlet and a gas outlet. The polar plate has two surfaces and at least one of these surfaces has a plurality of gas flow fields. These gas flow fields are column flow fields, serpentine flow fields, interdigitated flow fields or assembling thereof and connect with the gas inlet and the gas outlet. In addition, a fuel cell comprised two polar plates mentioned above and a membrane electrode assembly is provided. The membrane electrode assembly is disposed between these polar plates. By disposing these gas flow fields on the polar plates, the operating performance and effective power of the fuel cell can be enhanced.

Description

1227573, _Case No. 93101129_year month date_ί ±± _ V. Description of the Invention (1) Field of the Invention The present invention relates to an electrode plate (Polar Plate) and a fuel cell (Fue) using the electrode plate. 1 C e 1 1), and in particular, relates to an electrode plate of a fuel cell having a plurality of groups of gas flow channels and a fuel cell using the electrode plate. With the advancement of industry, the consumption of traditional energy sources such as coal, oil and natural gas has continued to increase. Due to the limited stock of natural energy, new alternative energy sources must be developed to replace traditional energy sources. Fuel cells are a type of Compared with the traditional internal combustion engine, the fuel cell has many advantages such as high energy conversion efficiency, clean exhaust, and low noise. To put it simply, a fuel cell is a type of power generation device that generates hydrogen through the electrochemical reaction of hydrogen and oxygen. It is basically a reaction of water electrolysis to convert its chemical energy into electrical energy. Taking a Proton Exchange Membrane Fuel Cell (PEMFC for short) as an example, it is mainly composed of a thin-film electrode group (Membrane Electrode A s s e m b 1 y) (M E A) and two electrode plates. The thin-film electrode group is mainly composed of a proton exchange membrane, two catalyst layers, and two gas diffusion layers. The catalyst layers are respectively disposed on both sides of the proton exchange membrane, and the gas diffusion layers are respectively disposed on the outside of the catalyst layer. Two electrode plates are arranged on both sides of the thin-film electrode group. The surface of the electrode plate usually has a gas channel to convey the gases (such as hydrogen and oxygen) for reaction. The gas channel can lead the above gases to the surface layer of the thin film electrode group, and then pass through the gas diffusion layer.

12650twfl.ptc Page 6 1225773 ______ Case No. 93101129 ___ month_Θ_correction__ —___ V. Description of the invention (2) After the catalyst layer, an electrochemical reaction occurs at the proton exchange membrane to generate electrons and Other products after the reaction (such as water vapor and thermal energy). Among them, the electrons form a usable current by an external bridge path, and other products are discharged from the battery by related mechanisms. It is worth noting that the magnitude and power of the current determine the efficiency of the battery, and the factors that determine the magnitude and power of the current mostly depend on the design of the gas flow channel on the electrode plate. 1A to 1C are schematic plan views of two types of gas flow channels arranged on a conventional electrode plate. At present, there are commonly known gas flow channels on the surface of the electrode plate, such as grid flow channels (C ο 1 umn F 1 〇w F "Id, CFF for short), Serpentine Flow Fleld (abbreviated for short) SFF) and bifurcated flow channel (interdigitated Fl0w F 1 e 1 d, IFF for short). First, please refer to Figure i A. The gas flow channel on this electrode plate 100 is a The grid-like flow passage 110 is a single grid-like flow passage design, and communicates with the gas inlet 102 and the gas outlet 104 on the electrode plate 100, The disadvantage of this design is that the fuel (ie, the reaction gas) cannot effectively use the entire area of the thin-film electrode group (MEA), which may cause the battery performance to decrease. Then, please refer to Figure 1B, this electrode plate The gas flow channel is a serpentine flow channel 12 0 ′, and the serpentine flow channel 12 2 is designed as a single serpentine flow channel, and is connected with the gas inlet 102 and the gas outlet 104 on the electrode plate 100. Communication, and the disadvantage of this design is that the flow path is too long, so that the concentration distribution of gaseous fuel Unevenness can easily lead to a decrease in battery performance. Finally, please refer to FIG. 1C. The gas flow channel on the electrode plate 100 is a branched flow channel 1 3 0, and the branched flow channel 1 3 0 series is a single branched flow channel design, and

12650twfl.ptc Page 7 1227573 _Case No. 93101129_ Year and Month Amendment_ V. Description of the Invention (3) The gas inlet 10 2 and the gas outlet 104 on 1 0 0 are connected, and this design has poor drainage Disadvantages can easily cause battery performance to decline. Therefore, it can be known from the above that the conventional gas flow channel, whether it is a grid flow channel, a serpentine flow channel, or a branch flow channel, is designed on the electrode plate with a single group of gas flow channels, each of which has a fuel efficiency that is not effective. Disadvantages such as the entire area of the thin-film electrode group (that is, the use efficiency of the reaction gas decreases), the uneven distribution of the concentration of the gas fuel, or the poor drainage. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electrode plate for a fuel cell. By designing multiple sets of grid-like flow passages, meandering flow passages, branching flow passages or a combination of gas flows on the electrode plate, In order to effectively use the fuel to the entire area of the thin-film electrode group, and to make the concentration of the gaseous fuel evenly distributed and excellent drainage. Another object of the present invention is to provide a fuel cell by designing a plurality of sets of grid-like flow passages, meandering flow passages, bifurcated flow passages, or combinations of gas flow passages on electrode plates in the fuel cell. It can improve the operating performance of the fuel cell to increase the operating power of the fuel cell. Based on the above objectives, the present invention provides an electrode plate for a fuel cell, which has a gas inlet and a gas outlet, and the electrode plate has two corresponding surfaces, at least one of which has a plurality of gas flow channels, and these The gas flow channel is selected from the group consisting of grid flow channel, snake flow channel and branch flow channel, and these gas flow channels are connected with gas inlet and gas outlet. Based on the above objectives, the present invention further proposes a fuel cell, mainly

12650twfl.ptc Page 8 1227573 _Case No. 93101129_Year Month__ V. Description of the invention (4) It consists of two electrode plates and a thin-film electrode group. Each electrode plate has a gas inlet and a gas outlet, and each electrode plate has a surface on which there are a plurality of gas flow channels, and these gas flow channels are selected from grid-type flow channels, A group of serpentine flow channels and bifurcated flow channels. These gas flow channels are connected to a gas inlet and a gas outlet. The thin-film electrode group is disposed between two electrode plates, and the thin-film electrode group is connected to the surface of an electrode plate having these gas flow channels. Based on the above object, the present invention provides another fuel cell, which is mainly composed of a plurality of electrode plates and a plurality of thin-film electrode groups. Each electrode plate has a gas inlet and a gas outlet, and each electrode plate has two corresponding surfaces, each of which has a plurality of gas flow channels, and these gas flow channels are selected from a grid-like shape. The gas flow channels are connected to the gas inlet and the gas outlet of the electrode plate. A plurality of thin-film electrode groups are staggered with the electrode plates, and the thin-film electrode groups are connected to the surfaces of the electrode plates. In a preferred embodiment of the present invention, when these gas flow channels are provided on one or both surfaces of the electrode plate, a common gas input flow channel is further provided on one or both surfaces of the electrode plate, and the common gas The input flow channel is connected between these gas flow channels and the gas inlet. In a preferred embodiment of the present invention, when there are these gas flow channels on one or both surfaces of the electrode plate, there are more gas input flow channels on one or both surfaces of the electrode plate, and each gas The input flow channel is correspondingly connected between a gas flow channel and a gas inlet. In addition, these gases transport

12650twfl.ptc Page 9 1227573 Case No. 93101129 Λ_ Revision V. Description of Invention (5) One of the inlet channels can also be connected to some gas channels and gas inlets. Out of the room. The fiber exchange membrane is not equipped with a catalyst setting channel or an electrode lifting channel. In the present invention, these gases have a common gas. In some embodiments of the invention, when one or both surfaces of the electrode plate are on one or both surfaces of the electrode plate, And the common gas output flow channel is connected between the gas inlets. In the embodiment, when one or both surfaces of the electrode plate are provided with flow channels on one or both surfaces of the electrode plate, each gas output flow channel is between the gas inlet and the gas inlet. In addition, these gas pipelines can be connected to part of the gas flow channel and the gas inlet of the preferred bulk flow channel gas flow channel and the preferred bulk flow channel gas supply. Several gas flow channels are present, and the conductive layer of the conductive layer of the invention is a proton-crossing electrode plate. The possibility is better, the fiber is better, and the second exchange membrane has multiple groups of materials and electricity, and the utilization rate is such that the two above-mentioned pools of the implementation gas are grid-like channels, and the other drainage example is a carbon fiber example. On the diffusion layer side, multiple gasses are in the electric flow path. Therefore, gas combustion is excellent on the one hand, and the concentration of the snake fuel fuel in the two-gas flow path electrode plate formed by the electrode plate dimension or the stone film power plant can also be Furthermore, the material is, for example, conductive ink fiber. The polar group consists of. Among them, the surface-surface flow channel of the diffusion layer can effectively reduce the energy of the water-lift fuel and the two-touch respectively. Or two, the use of uniform distribution of the battery, the proton medium layer is arranged on the surface, the branch flow to the film uniform to improve the flow

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Case No. 93101129 V. Description of the invention (6) Performance to increase the operating power of the fuel cell. In order to make the above and other aspects of the present invention easier to understand, a preferred embodiment is given below, and the advantages and advantages can be more clearly described as follows: 1. Sub-coordinate with the attached drawings to make the detailed methods 2A ~ 2C. A fuel cell according to an embodiment of the present invention which shows a plurality of sets of cross-type gas flow channels according to the present invention is a kind of fuel cell which has a 'first', please refer to FIG. 2A first. The body inlet 212 and the gas outlet 214 == the electrode plate, the gas port 2 1 4 is, for example, two diagonally located mouths 2 1 2 located on the electrode plate 2000, and the gas outlet 212 and the gas outlet 214 are, for example, two square meters. The gas plate has a wide plate 2 0 0 〇 In addition, the electric plate 2 0 has a surface 216 'This surface 216 has a plurality of branched fluorine flow channels 2 2 0 (this figure is only shown by margin Two), and these bifurcated gas flow channels 220 are connected to the gas inlet 212 and the gas outlet 214. The material of the electrode plate 200 is, for example, a conductive fiber, and the conductive fiber is, for example, a carbon fiber or a graphite fiber. In this embodiment, a common gas input flow channel 2 2 2 is further provided on the surface 2 1 6 of the electrode plate 200, and the common gas wheel inlet flow channel 2 2 2 and the two branched gas flow channels are provided. 2 2 0 communicates and is connected between the two branched gas flow channels 2 2 0 and the gas inlet 2 1 2. The common gas input flow channel 2 2 2 is used to transfer a reaction gas (such as hydrogen or oxygen) from the gas inlet 212 to the two branched gas flow channels 2 2 0. In addition, in this embodiment, a common gas output flow channel 224 is further provided on the surface 216 of the electrode plate 200, and the common gas output flow channel 2 2 4 communicates with the two branched gas flow channels 2 2 0, and

12650twfl.ptc Page 11 1227573 __Case No. 93101129_Year Month_Revision --- 5. Description of the invention (7) Connected between the two branched gas flow channels 2 2 0 and the gas outlet 2 1 4. By using this common gas output flow channel 2 2 4, a reaction gas (such as hydrogen or oxygen) is transmitted from the two branched gas flow channels 220 to the outside of the gas outlet 214. Please refer to FIG. 2B, wherein the structure of the electrode plate 2000 is substantially the same as the embodiment disclosed in the above FIG. 2A, and the same points are not repeated here, and the difference is that the surface 216 of the electrode plate 200 has four Cross-type gas flow channels 220, and the surface 216 of the electrode plate 200 has a plurality of gas input channels 2 2 6 (four are shown here), and these gas input channels 2 2 6 It communicates with these branched gas flow channels 220 in the manner described above, and is connected between the branched gas flow channels 220 and the gas inlet 212. Through these gas input channels 2 2 6, a reaction gas (such as hydrogen or oxygen) is transferred from the gas inlet 212 to the branched gas flow channels 220. In addition, in this embodiment, there are a plurality of gas output channels 2 2 8 (four are shown here) on the surface 2 1 6 of the electrode plate 2000, and the gas output channels 2 2 8 are in a pair. One way is to communicate with the branched gas flow channels 220 and connect between the branched gas flow channels 220 and the gas outlet 214. These gas input channels 228 are used to transfer a reaction gas (such as hydrogen or oxygen) from these branched gas channels 2 2 0 to the gas outlet 2 1 4. Please refer to FIG. 2C, wherein the structure of the electrode plate 200 is substantially the same as the embodiment disclosed in the above FIG. 2B, and the same points are not repeated here, and the difference lies in the design on the surface 216 of the electrode plate 200. There are a plurality of gas input channels 2 2 6 (two are shown here), and each of the gas input channels 2 26 is in communication with a partially crossed gas flow channel 2 2 0 (two are shown here). In addition, many gas output streams designed on the surface 2 1 6 of the electrode plate 2 0 0

12650twfl.ptc Page 121227573 _Case No. 93101129_year month_iMi_ V. Description of the invention (8) Channel 2 2 8 (two are shown here), where each gas output channel 2 2 8 is part and part The crossed gas flow channels 2 2 0 (two are shown here) communicate. Therefore, it can be known from the above that the electrode plate can be provided with multiple sets of cross-type gas flow channels on one surface, and the cross-type gas flow channels can be connected to the gas input port through one or more gas input flow channels, and the gas input When there are a large number of runners, they can be independent runners or partially connected runners. Similarly, the crossed gas flow channels can be connected to the gas outlet through one or more gas output flow channels, and when there are a plurality of gas output flow channels, they can also be independent flow channels or partially connected flow channels. . It is worth noting that the multiple gas flow channels designed on the surface of the above electrode plate are illustrated by cross gas flow channels. However, those skilled in the art should know that the present invention is not limited to The cross-shaped gas flow channels disclosed in 2A ~ 2C can also be other types of gas flow channels, which will be disclosed further below. FIG. 3 is a schematic top view of an electrode plate of a fuel cell with multiple sets of meandering gas flow channels according to another preferred embodiment of the present invention. Referring to FIG. 3, in this embodiment, multiple snake-like gas flow channels 2 3 0 (four are shown here) are arranged on one surface 2 1 6 of an electrode plate 2 0 0 of a fuel cell, and as described above, One or more gas input channels 2 2 6 can be communicated between the serpentine gas flow channels 2 3 0 and the gas inlet 2 1 2, and between the snake gas flow channels 2 3 0 and the gas outlet 2 1 4 One or more gas output channels 2 2 8 ° can be connected. FIG. 4 shows a schematic top view of an electrode plate of a fuel cell having multiple sets of grid-like gas channels according to another preferred embodiment of the present invention. please

12650twfl.ptc Page 13 No. 1227573 No. 93101129 Amendment V. Description of the Invention (9) Referring to FIG. 4, in this embodiment, a plurality of grid-like gas flows are arranged on one surface 2 1 0 of an electrode plate 2 of a fuel cell Channel 2 4 〇 (two are shown here), and as mentioned above, one or more gas input channels 2 2 6 can be communicated between the grid gas flow channels 2 4 0 and the gas inlet 2 丨 2 And one or more gas output channels 2 2 8 ° can be communicated between the grid-shaped gas flow channels 230 and the gas outlet 214, the above-mentioned 'then the above-mentioned multiple groups are selected from the grid-shaped flow channels The application of the electrode plate of the serpentine V-channel knife-and-turn flow channel to a polymer thin film fuel cell (PEMFC) is exemplified and described in detail below. Fig. 6 shows a schematic structural diagram of a fuel cell according to a preferred embodiment of the present invention. Please refer to FIG. 5. The fuel cell 3000 is mainly composed of two electrode plates 2000 and a thin-film electrode group 3 as disclosed above. The membrane electrode group 310 is composed of a proton exchange membrane. 312. A two-catalyst layer 314 and a two-body diffusion layer 3 1 6. Among them, two catalyst layers 3 丨 4 are respectively disposed on both sides of Wu Zifu's membrane 3 1 2 and two gas diffusion layers 3 丨 6 are respectively disposed between the catalyst layer 3 1 4 and the two electrode plates 2000. And this gas diffusion layer 316 is connected to the surface 216 on which the multi-component bifurcated (snake type, grid type) gas flow channel 2 2 0 (230, 240) is arranged. Qing continued to refer to FIG. 5 and cooperated with the second person to the fourth image in a timely manner. Since one surface 2 of the electrode plate 2 of the present invention is changed to a multi-component bifurcated gas flow channel 2 2 0: multiple groups Snake-type gas flow channel 23 × or multiple sets of grid-type gas flow channels 2 4 0 'These bifurcated (snake-type, grid-type) gas flow channels 2 2 0j 2 3 0, 2 4 0) will be available It is easier to direct the fuel (ie, the reaction gas) to the surface layer of the thin-film electrode group 3 1 0, and after passing through the gas diffusion layer 3 丨 6 and the catalyst layer 3 丨 4,

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Page 14 1237573 _Case No. 93101129_ Year and month amendment_ V. Description of the invention (10) The required current is generated at the proton exchange membrane 3 1 2 so that the fuel (ie the reaction gas) can be used more effectively to the membrane electrode The total area of group 3 1 0. In addition, in comparison, the path of each group of gas flow paths is shorter than the path known as a single gas flow path, so that the concentration distribution of the gas fuel can be more uniform, and the utilization rate of the reaction gas can be improved. It can also reduce the possibility of moisture accumulating inside the flow channel, and make the drainage excellent. Therefore, it can be known from the above that the fuel cell of the present invention adopts an electrode plate having a plurality of groups selected from a grid flow passage, a meander flow passage, a branch flow passage (or a combination of the above flow passages), which can improve Operational performance of fuel cells and increase the operating power of fuel cells. The fuel cell in the above embodiment has a plurality of gas flow channels selected from a grid-shaped flow channel, a meandering flow channel, a branching flow channel (or a combination of the above flow channels) formed on one surface of the electrode plate. To improve the operating performance of fuel cells and increase the operating power of fuel cells. However, those skilled in the art should know that the electrode plate in the fuel cell of the present invention is not limited to forming multiple sets of gas flow channels on only one surface, and the above-mentioned multiple groups may be arranged on both surfaces of the electrode plate. Gas runner. FIG. 6 is a schematic structural diagram of a fuel cell according to another preferred embodiment of the present invention. The structure of the fuel cell 3 0 0 ′ in this embodiment is substantially the same as the fuel cell 3 0 0 disclosed in FIG. 5 above, the same points are not repeated, and the difference lies in the fuel cell 3 0 0 ′. A plurality of the above-disclosed thin-film electrode groups 3 1 0 and a plurality of the above-disclosed electrode plates 2 0 0 are stacked on each other, and the two surfaces 216 and 218 of the electrode plate 2 0 0 of the present embodiment are provided with the above-mentioned The most-composed bifurcated (snake, grid) flow channel 2 2 0 (2 3 0, 2 4 0) is disclosed. In short, the most-composed bifurcated (snake, grid) Shape) flow channel

12650twfl.ptc Page 15 1227573 _Case No. 93101129_Year_Month__ V. Description of the invention (11) 2 2 0 (2 3 0, 2 4 0) The gas flow channel can also be used for bipolar plates ( bipolar plate). In summary, the fuel cell of the present invention forms a multi-component bifurcated flow passage, a meandering flow passage, a grid flow passage, or a combination of gas flow passages on one or both surfaces of the electrode plate. The fuel can be effectively used to the entire area of the thin-film electrode group, and the concentration of the gaseous fuel can be evenly distributed to improve the utilization rate of the reaction gas. On the other hand, it can also reduce the possibility of moisture accumulation inside the flow channel and make the drainage excellent To further improve the operating performance of the fuel cell to increase the operating power of the fuel cell. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

12650twfl.ptc Page 16 1227573 _Case No. 93101129_Year Month Date__ Brief description of the drawings Figures 1A to 1C are the top views of three gas flow channels on conventional electrode plates. Figures 2A to 2C show schematic top views of electrode plates of a fuel cell having multiple sets of crossed gas flow channels according to a preferred embodiment of the present invention. FIG. 3 is a schematic top view of an electrode plate of a fuel cell with multiple sets of meandering gas flow channels according to another preferred embodiment of the present invention. FIG. 4 is a schematic top view of an electrode plate of a fuel cell having a plurality of grid gas flow channels according to another preferred embodiment of the present invention. FIG. 5 is a schematic structural diagram of a fuel cell according to a preferred embodiment of the present invention. FIG. 6 is a schematic structural diagram of a fuel cell according to another preferred embodiment of the present invention. [Schematic description] 100 electrode plate 102 gas inlet σ 104 gas outlet π 110 grid flow channel 120 serpentine flow channel 130 bifurcated flow channel 200 electrode plate 212 gas inlet V 214 gas outlet α 216 surface 218 surface

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Case No. 93101129 Brief description of the diagram 220 Bifurcated runner 222 Common gas input runner 224 Common gas output runner 226 Gas input runner 228 Gas output runner 3 0 0, • 3 0 0 ′: Fuel cell 310 membrane Electrode group 312 Proton exchange membrane 314 Catalyst layer 316 Gas diffusion layer 12650twfl.ptc Page 18

Claims (1)

1227573 _Case No. 93101129_Year_Month_Amendment_ VI. Scope of Patent Application 1. A fuel cell electrode plate has a gas inlet and a gas outlet, and the electrode plate has two corresponding surfaces, and the surfaces are at least One of them has a plurality of gas flow channels, and the gas flow channels are selected from the group consisting of grid flow channels, serpentine flow channels, and bifurcated flow channels. The gas inlet and the gas outlet are connected. 2. The electrode plate of a fuel cell according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a common gas input flow channel, and the common gas input flow channel is connected to the gas flows. Between the channel and the gas inlet. 3. The electrode plate for a fuel cell as described in item 1 of the scope of patent application, wherein at least one of the surfaces has a plurality of gas input channels, and each of the gas input channels is connected to the gas channel separately. Between one of the gas flow channels and the gas inlet. 4 · The electrode plate for a fuel cell as described in item 1 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas input channels, and one of the gas input channels is connected to a part respectively. Between the gas flow channels and the gas inlet. 5. The electrode plate for a fuel cell according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a common gas output flow channel, and the common gas output flow channel is connected to the gas flows. Between the channel and the gas inlet. 6 · The electrode plate of a fuel cell as described in item 1 of the scope of the patent application, wherein at least one of the surfaces has a plurality of gas output channels, and each of the gas output channels is connected to the gas channel separately. Gas channel 12650twfl.ptc Page 19 1227573 _Case No. 93101129_ Year Month__ VI. One of the scope of patent application and the gas inlet. 7 · The electrode plate for a fuel cell according to item 1 of the scope of the patent application, wherein at least one of the surfaces further has a plurality of gas output channels, and one of the gas output channels is connected to a part respectively. Between the gas flow channels and the gas inlet. 8. The electrode plate of a fuel cell according to item 1 of the scope of the patent application, wherein the material of the electrode plate of the fuel cell is conductive fiber. 9. The electrode plate for a fuel cell according to item 8 of the scope of the patent application, wherein the conductive fiber is one of a carbon fiber and a graphite fiber. 1 0. A fuel cell comprising: two electrode plates, each of which has a gas inlet and a gas outlet, and each of the electrode plates has a surface with a plurality of gas flow channels, The gas flow channels are selected from the group consisting of grid flow channels, serpentine flow channels, and bifurcated flow channels, and the gas flow channels are connected to the gas inlet and the gas outlet; and A thin film electrode group is disposed between the electrode plates, and the thin film electrode group is connected to the surface of each of the electrode plates. 11. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a common gas input channel, and the common gas input channel is connected to the gas channels and the gas inlet. between. 12. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a plurality of gas input channels, and each of the gas input channels is connected to each of the gas channels separately. And between the gas inlet. 12650twf1.ptc Page 20 1225773 _Case No. 93101129_Year_Month__ VI. Patent application scope 1 3. The fuel cell according to item 10 of the patent application scope, wherein the surface has a plurality of gas input streams Channel, one of the gas input flow channels is respectively connected between some of the gas flow channels and the gas inlet. 14. The fuel cell according to item 10 of the scope of the patent application, wherein the surface further has a common gas output channel, and the common gas output channel is connected to the gas channels and the gas inlet. between. 15. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a plurality of gas output channels, and each of the gas output channels is respectively connected to one of the gas channels. And between the gas inlet. 16. The fuel cell according to item 10 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas output channels, and one of the gas output channels is respectively connected to a part of the Between the gas flow channels and the gas inlet. 17. The fuel cell according to item 10 of the scope of the patent application, wherein the thin-film electrode group includes: a proton exchange membrane; two catalyst layers respectively disposed on both sides of the proton exchange membrane; and two gas diffusion layers Respectively disposed between one of the catalyst layers and one of the electrode plates. 1 8. The fuel cell according to item 10 of the scope of patent application, wherein the material of the electrode plates is conductive fiber. 19. The fuel cell according to item 18 of the scope of patent application, wherein 12650twfl.ptc Page 21 1227573 _Case No. 93101129_ Year Month__ VI. Patent Application Scope Conductive fiber is one of carbon fiber and graphite fiber. 2 0. A fuel cell comprising: a plurality of electrode plates, each of which has a gas inlet and a gas outlet, and each of the electrode plates has two corresponding surfaces, each of which has A plurality of gas flow channels, and the gas flow channels are selected from the group consisting of a grid flow channel, a snake flow channel, and a branch flow channel, and the gas flow channels are connected with each of the electrodes The gas inlet and the gas outlet of the plate are connected; and a plurality of thin film electrode groups, the thin film electrode groups are staggered with the electrode plates, and the thin film electrode groups are connected to the surfaces of the electrode plates. 2 1. The fuel cell according to item 20 of the scope of patent application, wherein each of these surfaces further has a common gas input flow channel, and the common gas input flow channel is connected to each of the surfaces. Between the gas flow channels and the gas inlet. 2 2. The fuel cell according to item 20 of the scope of the patent application, wherein each of the surfaces further has a plurality of gas input channels, and each of the gas input channels is connected to each of these Between one of the gas flow channels on the surface and the gas inlet. 2 3. The fuel cell according to item 20 of the scope of patent application, wherein each of these surfaces further has a plurality of gas input channels, and one of the gas input channels is connected to each of these A portion of the surface between the gas flow channels and the gas inlet. 24. The fuel cell as described in item 20 of the scope of patent application, wherein each 12650twf1.ptc Page 22 1227573 _ Case No. 93101129_ Year Month Date __ Sixth, the scope of the application for a patent-there is a common gas output flow channel on these surfaces, and the common gas output flow channel is connected to each of these Between the gas flow channels and the gas inlet on the surface. 25. The fuel cell according to item 20 of the scope of the patent application, wherein each of the surfaces further has a plurality of gas output channels, and each of the gas output channels is connected to each of these Between one of the gas flow channels on the surface and the gas inlet. 26. The fuel cell according to item 20 of the scope of the patent application, wherein each of these surfaces further has a plurality of gas output channels, and one of the gas output channels is connected to each of these A portion of the surface between the gas flow channels and the gas inlet. 27. The fuel cell according to item 20 of the scope of patent application, wherein each of the thin film electrode groups includes: a proton exchange membrane; two catalyst layers respectively disposed on both sides of the proton exchange membrane; and The gas diffusion layers are respectively disposed between one of the catalyst layers and one of the electrode plates. 28. The fuel cell according to item 20 of the scope of patent application, wherein the electrode plates are made of conductive fiber. 29. The fuel cell according to item 28 of the scope of patent application, wherein the conductive fiber is one of carbon fiber and graphite fiber. 12650twf1.ptc Page 23