CN2893937Y - fuel cell device - Google Patents

Abstract

The utility model provides a fuel cell device, which at least comprises: one or more membrane electrode groups, wherein the membrane electrode group at least comprises: an anode electrode, a proton exchange membrane and a cathode electrode. And at least one double-sided flow channel plate is arranged on one side of the membrane electrode group, wherein the double-sided flow channel plate uses a corrugated structure.

Description

fuel cell device

technical field

The present invention relates to a fuel cell, and in particular to a fuel cell device with a double-sided flow channel plate.

Background technique

A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy through electrode reactions. There are quite a lot of types of fuel cells, and the classification methods are also different. If they are distinguished according to the properties of proton exchange membranes, there are alkaline fuel cells, phosphoric acid fuel cells, proton exchange membrane fuel cells, molten carbonate fuel cells, Fuel cells with five different proton exchange membranes, including solid oxide fuel cells.

In the traditional fuel cell structure, the flow channel plate is placed at both ends of the membrane electrode assembly (MEA), and the material used should have the characteristics of high conductivity, high strength, easy processing, light weight and low cost. The material of the runner plate is graphite, aluminum and stainless steel, usually made of graphite. The flow channel is processed on the flow channel plate as a channel for supplying fuel and gas, so that the reactants can reach the diffusion layer through the flow channel, and then enter the active layer to participate in the reaction. In addition, the runner plate also has the function of conducting current, so that the current generated by the reaction can be applied, so it is also called a current collect plate.

However, traditional runner plates (such as graphite plates) are usually designed with single-sided runners, and they are bulky, not light enough, and their electrical conductivity needs to be strengthened. However, the traditional fuel cell stack (stack) is formed by stacking such bulky single-sided flow channel plates, which doubles the overall volume and weight of the fuel cell stack, which is not conducive to integration into portable consumer devices. Electronic products, and the overall power collection capacity is not satisfactory.

new content

The main purpose of the present invention is to provide a fuel cell device, which can not only greatly reduce the volume and weight of the fuel cell itself, but also improve the current collecting function of the flow channel plate.

In order to achieve the above-mentioned purpose of the present model, the present model provides a fuel cell device, which at least includes: more than one membrane electrode group, wherein the membrane electrode group at least includes: an anode electrode, a proton exchange membrane and a cathode electrode; a The above double-sided flow channel plate is arranged on one side of the membrane electrode group, wherein the double-sided flow channel plate uses a corrugated structure.

1. The new fuel cell device uses a double-sided flow channel plate with a corrugated structure, which can greatly reduce the overall volume and weight of the fuel cell (especially the fuel cell stack), which is conducive to integrating the fuel cell into a portable consumer electronics.

2. The new fuel cell device utilizes the rigidity of the double-sided flow channel plate itself, so the current collector can be made into an extremely thin structure, which can greatly reduce the volume and weight of the fuel cell itself.

3. The double-sided flow channel plate used in the new fuel cell device can use a chemical-resistant non-conductive engineering plastic plate body, and then set a conductive material collector sheet, which not only makes the fuel cell lighter in weight And it has the convenience of being portable, and at the same time makes the double-sided flow channel plate have a good current collecting function.

4. The double-sided flow channel plate used in the new fuel cell device can effectively prevent fuel (such as: methanol) or electrochemical reaction products from damaging the surface of the current collector, thereby reducing the replacement rate of the fuel cell.

In order to make those skilled in the art understand the purpose, features and effects of the present invention, the present invention will be described in detail as follows through the following specific embodiments, together with the accompanying drawings.

Description of drawings

Fig. 1 is a three-dimensional assembled view of the basic parts of a specific embodiment of the novel fuel cell device;

Fig. 2A is a three-dimensional assembled view of the basic parts of another specific embodiment of the new fuel cell device;

Fig. 2B is a three-dimensional exploded view of Fig. 2A of the present invention;

Fig. 3A is a three-dimensional assembled view of the basic parts of another specific embodiment of the new fuel cell device;

Fig. 3B is a three-dimensional exploded view of Fig. 3A of the present invention;

FIG. 4A shows a schematic cross-sectional view of the detailed structure of the double-sided flow channel plate used in the novel fuel cell device;

Fig. 4B shows a schematic cross-sectional view of a variant embodiment of the double-sided flow channel plate in Fig. 4A;

Fig. 5 is a three-dimensional exploded view of the essential part of a variant embodiment of the fuel cell device in Fig. 2A.

Symbol Description

Fuel cell device (1), (2), (3) Membrane electrode group (10), (20), (30)

Anode electrode (100), (200), (300) Proton exchange membrane (102), (202), (302)

Cathode electrode (104), (204), (304) Groove (120), (220), (320), (322)

Double-sided runner plate (12), (22), (32) Substrate (24)

Channel (240) Import (240a)

Circuit Assembly(26) Leads(28)

Plate body(40) Collector sheet(42)

metal layer (42a) circuit assembly (44)

Detailed ways

Fig. 1 shows a three-dimensional assembled view of the basic parts of a specific embodiment of the new fuel cell device.

As shown in Fig. 1, the fuel cell device (1) of the present invention is a single fuel cell, which at least includes: a membrane electrode group (10), and a double-sided flow channel plate (12). Wherein, the membrane electrode group (10) at least includes: an anode electrode (100), a proton exchange membrane (102) and a cathode electrode (104). The double-sided flow channel plate (12) is arranged on one side of the membrane electrode group (10), and the double-sided flow channel plate (12) uses a corrugated structure. As shown in FIG. 1 , the fuel cell device of the present invention can make the fuel pass through the groove ( 120 ) to perform an electrochemical reaction with the membrane electrode group ( 10 ) through a supply mechanism, thereby generating electricity.

Fig. 2A is a three-dimensional combined view of the basic parts of another specific embodiment of the fuel cell device of the present invention. FIG. 2B is an exploded perspective view of FIG. 2A of the present invention. Referring to Fig. 2A and Fig. 2B, the fuel cell device (2) of the present invention is a fuel cell stack (stack), which at least includes: the membrane electrode groups (20) and double-sided flow channel plates (22). Wherein, the membrane electrode group (20) at least includes: an anode electrode (200), a proton exchange membrane (202) and a cathode electrode (204). The double-sided flow channel plate (22) is arranged on one side of the membrane electrode groups (20), especially arranged between the anode electrodes (200) of the membrane electrode groups (20), and the two-sided flow The track plate (22) uses a corrugated structure. Of course, the double-sided flow channel plate (22) in the novel fuel cell device (2) is not limited to being arranged between the anode electrodes (200) of the membrane electrode groups (20), it is also It can be applied to a variety of variant embodiments, for example: the double-sided flow channel plate (22) can be arranged between the cathode electrodes (204) of the membrane electrode groups (20), or the double-sided flow channel plate can be (22) arranged between the anode electrode (200) and the cathode electrode (204) of the membrane electrode groups (20). In addition, as shown in FIG. 2A , the fuel cell device of the present invention can make the fuel pass through the groove ( 220 ) to perform electrochemical reaction with the membrane electrode groups ( 20 ) through a supply mechanism, thereby generating electricity.

Fig. 3A is a three-dimensional assembled view of the basic parts of another specific embodiment of the new fuel cell device. Fig. 3B is an exploded perspective view of Fig. 3A of the present invention. Shown with reference to Fig. 3A and Fig. 3B, the fuel cell device (3) of the present invention is a fuel cell stack (stack), and it is to comprise at least: these membrane electrode groups (30), these double-sided flow channel plates (32 ). Wherein, the membrane electrode groups (30) are arranged between the double-sided channel plates (32), which at least include: an anode electrode (300), a proton exchange membrane (302) and a cathode electrode (304). Moreover, the double-sided flow channel plates (32) use a corrugated structure. As shown in the third figure A, the fuel cell device of the present invention can use a supply mechanism to enable fuel or air to undergo electrochemical reactions with the membrane electrode groups (30) through the grooves (320) or grooves (322) , thus generating electricity.

FIG. 4A shows a schematic cross-sectional view of the detailed structure of the double-sided flow channel plates (12), (22), and (32) used in the fuel cell device of the present invention. Shown with reference to Fig. 4A, the double-sided flow channel plate (12), (22), (32) used in the present invention comprises: plate body (40) is to have at least one flow channel structure, wherein these flow channel structures The setting positions of the membrane electrode groups (10), (20) and (30) are corresponding to the setting positions of these membrane electrode groups (10), (20), (30). As shown in the fourth figure, the channel structure is a wave structure. These collector sheets (42) are a conductive material and these collector sheets (42) respectively cover the flow channel structures of the plate body (40), and these collector sheets (42) are fixed on the plate body (40), as shown in FIG. 4A, the current collectors (42) also use a wave structure. In terms of material selection, the base material of the plate body (40) can be selected from chemical-resistant non-conductive engineering plastic substrates, plastic carbon substrates, FR4 substrates, FR5 substrates, epoxy resin substrates, glass fiber substrates, ceramic substrates, polymer substrates, etc. One of plasticized substrates and composite material substrates. And the material of current collector sheet (42) can be to select the good material of a conductivity, and its surface especially through anti-corrosion and/or anti-acid treatment or its own promptly has the chemical resistance metal material of this characteristic (as: stainless steel, titanium, gold, graphite, carbon metal compounds, etc.). Moreover, the collector sheet (42) may further include a metal layer (42a), which is formed on the surface of the collector sheet (42) through processes such as sputtering and spraying, wherein the material of the metal layer (42a) may be Choose from one of gold, copper, silver, carbon, highly conductive metals, and more.

FIG. 4B shows a schematic cross-sectional view of a variant embodiment of the double-sided flow channel plate in FIG. 4A . As shown in Figure 4B, the board body (40) can be further provided with more than one circuit assembly (44), and the circuit assembly (44) can be a wiring (circuitry), and particularly a printed wiring (printed circuitry), wherein The circuit assembly (44) is electrically connected with the collector sheet (42).

Fig. 5 is a three-dimensional exploded view of the essential part of a variant embodiment of the fuel cell device in Fig. 2A. As shown in Figure 5, the fuel cell device (2) of the present invention may further include: a substrate (24) having at least one hollow portion, wherein the positions of these hollow portions are correspondingly matched with the membrane electrode groups (20), and make the membrane electrode groups (20) and the double-sided flow channel plate (22) can be pressed and tightly connected to the substrate (24). Moreover, the substrate (24) can be further provided with more than one circuit assembly (26), and the circuit assembly (26) can be a wiring (circuitry), and particularly a printed wiring (printed circuitry), wherein the circuit assembly (26 ) can be electrically connected to the current collectors (42) of the double-sided flow channel plate (22) through contact with the lead wire (28), so that the current collectors (42) are connected through the wiring The electrical connections form a series and/or parallel circuit, so that the power generating units of the fuel cell stack can be connected together. In terms of the fuel supply mechanism of the novel fuel cell device (2), it can be implemented through the channels (240) arranged on the substrate (24). First, the fuel is injected into the inlet (240a), then the fuel travels along the channel (240), and finally flows into the groove (220), so that the fuel can electrochemically react with the membrane electrode groups (20), thus generating electricity.

The fuel cell device of the present invention may be a fuel cell using liquid fuel (such as: methanol), or a fuel cell using gaseous fuel, or a fuel cell using solid fuel, and the like. Finally, the beneficial effects of the present invention are summarized as follows:

1. The new fuel cell device uses a double-sided flow channel plate with a corrugated structure, which can greatly reduce the overall volume and weight of the fuel cell (especially the fuel cell stack), which is conducive to integrating the fuel cell into a portable consumer electronics.

2. The new fuel cell device utilizes the rigidity of the double-sided flow channel plate itself, so the current collector can be made into an extremely thin structure, which can greatly reduce the volume and weight of the fuel cell itself.

3. The double-sided flow channel plate used in the new fuel cell device can use a chemical-resistant non-conductive engineering plastic plate body, and then set a conductive material collector sheet, which not only makes the fuel cell lighter in weight And it has the convenience of being portable, and at the same time makes the double-sided flow channel plate have a good current collecting function.

4. The double-sided flow channel plate used in the new fuel cell device can effectively prevent fuel (such as: methanol) or electrochemical reaction products from damaging the surface of the current collector, thereby reducing the replacement rate of the fuel cell.

Although the present invention has been disclosed as above with specific embodiments, the disclosed specific embodiments are not intended to limit the present invention. Any person familiar with this technology may make various modifications without departing from the spirit and scope of the present invention. The changes and modifications made by it all belong to the category of the present model, and the protection scope of the present model should be defined by the claims of the present application as the criterion.

Claims (22)

1. A fuel cell device, characterized in that it at least comprises: More than one membrane electrode group, wherein the membrane electrode group at least includes: an anode electrode, a proton exchange membrane and a cathode electrode; More than one double-sided flow channel plate is arranged on one side of the membrane electrode group, wherein the double-sided flow channel plate uses a corrugated structure. 2. The fuel cell device of claim 1, wherein the fuel cell device is a fuel cell stack. 3. The fuel cell device according to claim 2, wherein the double-sided flow channel plate is disposed between the anode electrodes and/or the cathode electrodes of the membrane electrode groups. 4. A fuel cell device, characterized in that it at least comprises: A plurality of double-sided flow channel plates, wherein the double-sided flow channel plates use a corrugated structure; More than one membrane electrode group is arranged between the double-sided flow channel plates, wherein the membrane electrode group at least includes: an anode electrode, a proton exchange membrane and a cathode electrode. 5. The fuel cell device of claim 4, wherein the fuel cell device is a fuel cell stack. 6. The fuel cell device according to claim 1 or 4, wherein the double-sided flow channel plate comprises: A plate body having at least one flow channel structure, wherein the installation positions of the flow channel structures correspond to the installation positions of the membrane electrode groups; More than one collector sheet is a conductive material and the collector sheets respectively cover the channel structures of the plate body, and these collector sheets are fixed to the plate body; and 7. The fuel cell device as claimed in claim 6, wherein the channel structure is a corrugated structure. 8 . The fuel cell device as claimed in claim 6 , wherein the current collector adopts a corrugated structure. 9. The fuel cell device as claimed in claim 6, wherein the base material of the board is selected from a chemical-resistant non-conductive engineering plastic substrate, a plastic carbon substrate, a FR4 substrate, a FR5 substrate, a One of an epoxy resin substrate, a glass fiber substrate, a ceramic substrate, a polymer plasticized substrate and a composite material substrate. 10 . The fuel cell device according to claim 6 , wherein the material of the current collector is selected from one of stainless steel, titanium, gold, graphite, carbon-metal compounds, and chemical-resistant metals. 11 . 11. The fuel cell device as claimed in claim 6, wherein the collector sheet is a conductive material, and its surface is treated with anti-corrosion and/or anti-acid treatment. 12. The fuel cell device as claimed in claim 6, wherein the collector sheet further comprises: a metal layer formed on the surface of the collector sheet. 13. The fuel cell device according to claim 12, wherein the material of the metal layer is selected from one of gold, copper, silver, carbon, and high-conductivity metals. 14. The fuel cell device according to claim 6, wherein the double-sided flow channel plate further comprises: At least one or more circuit components are arranged on the board. 15. The fuel cell device as claimed in claim 14, wherein the circuit component is a wiring. 16. The current collector plate as claimed in claim 15, wherein the wiring is a printed wiring and is electrically connected to the current collector sheets. 17. The fuel cell device of claim 6, further comprising: A substrate has at least one hollow part, wherein the positions of the hollow parts correspond to the positions of the membrane electrode groups. 18. The fuel cell device according to claim 17, further comprising: at least one circuit component disposed on the substrate. 19. The fuel cell device as claimed in claim 18, wherein the circuit component is a wiring. 20. The fuel cell device as claimed in claim 19, wherein the wiring is a printed wiring, and is electrically connected to the current collectors of the double-sided flow channel plate. 21. The fuel cell device according to claim 20, wherein the current collectors are electrically connected through the wiring to form a series and/or parallel circuit. 22 . The collector plate according to claim 17 , wherein the membrane electrode groups and the double-sided flow channel plate are press-fitted and tightly bonded to the substrate. 23 .

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