CN201041818Y - Collector plate for fuel cell - Google Patents

Abstract

The utility model provides a collector plate for a fuel cell, comprising: a plate body having at least one collector area, at least one wiring line arranged on the surface of the plate body, and at least one prefabricated collector sheet, which is a highly conductive material, wherein the collector sheets are respectively closely attached to and cover the collector areas of the plate body, and extend to contact the wiring lines.

Description

Collector plates for fuel cells

technical field

The utility model relates to the field of batteries, in particular to a collector plate with high current collecting capacity for fuel cells.

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 few types of fuel cells, and the classification methods are also different. If they are distinguished according to the nature of the electrolyte, there are alkaline fuel cells, phosphoric acid fuel cells, proton exchange membrane fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. A fuel cell with five different electrolytes such as a fuel cell. However, during the electrochemical reaction of traditional fuel cells, the current collecting ability of the collector plate (including: anode collector plate and cathode collector plate) has never been able to reach a very high level, and the collector plate has been in the fuel for a long time. And the corrosion resistance or acid resistance in the electrochemical reaction product is not very good, and its life is damaged. In addition, in addition to the disadvantage of not being light enough, the traditional collector plate has a cumbersome manufacturing procedure.

Utility model content

In view of the above deficiencies in the prior art, the main purpose of the present utility model is to provide a collector plate for fuel cells, which has the advantage of high current collection capability.

The secondary purpose of this utility model is to provide a collector plate for fuel cells, which can effectively prevent fuel or electrochemical reaction products from damaging its surface, and has the advantages of light weight and easy manufacture.

In order to achieve the above purpose, the utility model provides a collector plate for a fuel cell, comprising:

A plate body having at least one collector area;

At least one or more traces are arranged on the surface of the board; and

At least one prefabricated current collector sheet is a high-conductivity material, wherein the current collector sheets are closely attached to and cover the collector areas of the board body, and extend to contact the wires.

The collector sheet has an extension portion, and the extension portion is in contact with the wiring, and is electrically connected to the wiring.

The substrate of the board body is a printed circuit board substrate.

The substrate of the board is selected from FR4 substrate, FR5 substrate, epoxy resin substrate, glass fiber substrate, ceramic substrate, polymer plasticized substrate or composite material substrate.

The highly conductive material is a chemically resistant material that is resistant to corrosion and/or acids.

The high conductivity material is selected from stainless steel material, gold material, titanium material, graphite material or carbon metal compound material.

The plate body has a plurality of through holes within the range of the collector area.

The collector sheet has at least one through-hole corresponding to the through-holes in the range of the collector region, and the pattern of the through-holes in the collector sheet is consistent with the through-holes in the range of the collector region. unanimous.

The arrangement of the through holes forms a fence structure.

The arrangement of the through holes forms a network structure.

The current collector sheets are press-fitted and tightly connected to the plate body by spot welding, argon welding or bonding.

This trace is a printed wiring.

The current collector sheets are pressure-bonded to the plate body by using an adhesive.

The adhesive is Prepreg resin film.

The adhesive is AB glue.

The current collecting regions are formed on the body of the anode current collecting plate; and the current collecting sheets attached to cover the current collecting regions are respectively in contact with the membrane electrode groups.

By implementing the utility model, the collector plate of the fuel cell can be equipped with high current collecting capacity, and can effectively prevent fuel or electrochemical reaction products from damaging its surface, and has the advantages of light weight and convenient manufacture.

Description of drawings

Fig. 1 is a three-dimensional exploded view of a fuel cell using a collector plate of the present invention.

Fig. 2 is a three-dimensional exploded view of a collector plate of the present invention.

Fig. 3 is a three-dimensional assembled view of a variation embodiment of the collector plate (2) in Fig. 2 .

Fig. 4 is a perspective combined view of another variant embodiment of the collector plate (2) in Fig. 2 .

In the picture:

Fuel cell(1) Cathode collector plate(10)

Membrane electrode assembly plate (12) Membrane electrode assembly (120)

Anode collector plate(14) Collector sheet(140)

Runner plate(16) Collector plate(2)

Plate body(20) Collector area(200)

Through hole (200a) Routing (202)

Collector sheet (22) Through hole (220)

Extension (222) Board (30)

Collector (32) Through hole (34)

Plate body (40) collector piece (42) through hole (44)

Detailed ways

In order to make those who are familiar with this art understand the purpose, characteristics and effects of the present utility model, utilize following specific embodiment, and cooperate accompanying drawing, the utility model is explained in detail as follows:

Fig. 1 is a three-dimensional exploded view of a fuel cell using a collector plate of the present invention. As shown in Figure 1, according to the order from left to right, the fuel cell (1) at least includes: cathode collector plate (10), membrane electrode assembly plate (12), anode collector plate (14), flow channel plate (16). Wherein, the membrane electrode group plate (12) has at least one membrane electrode group (120), and the cathode collector plate (10) is the side of the cathode electrode (or air electrode) in the structure of the membrane electrode group (120) contacting .

Fig. 2 is a three-dimensional exploded view of a collector plate of the present invention. The current collector plate (2) of the present utility model can be applied to the cathode current collector plate (10) and the anode current collector plate (14) of the fuel cell (1) in FIG. 1 . As shown in FIG. 2 , the current collector plate (2) of the present invention mainly includes: a plate body (20), wires (202) and collector sheets (22). These components are described in detail below: the base material of the plate body (20) can be made by printed circuit board substrates, such as FR4 substrates, FR5 substrates, epoxy resin substrates, glass fiber substrates, ceramic substrates, polymer plasticized substrates, etc. One of substrates or composite material substrates. As shown in Fig. 2, the plate body (20) is provided with more than one collector area (200). Regarding the formation of the collector region (200), an insulating region can be formed by pre-etching the plate body (20) within the range of the collector region (200) to remove metal, or the plate body (20 ) on the thin metal layer except the collector area (200) and the wiring (202) are etched away to form a metal conductive circuit. Moreover, the positions of each collector area (200) correspond to the positions of each membrane electrode group (120) of the fuel cell (1) in FIG. 1 . Furthermore, in the thickness direction of the plate body (20), the plate body (20) belonging to the collector area (200) is penetrated with a plurality of through holes (200a), thereby allowing fuel to pass through the through holes (200a) and flow into the membrane electrode group (120), and at the same time, the reactants (such as carbon dioxide) generated by the membrane electrode group (120) after the electrochemical reaction can flow out through the through holes (200a).

At the same time, the current collector plate (2) of the present invention includes at least one or more wiring (202), which is arranged on the surface of the plate body (20), and can be implemented by printed circuitry.

Furthermore, the collector plate (2) of the present invention includes at least one prefabricated collector sheet (22). The current collector (22) uses a material with high conductivity, and is also a corrosion-resistant and/or anti-acid chemical-resistant material. Such high-conductivity materials can be selected from stainless steel, gold, titanium, and graphite. , carbon metal compound materials and the like. And as shown in FIG. 1 , the current collector sheets ( 22 ) are closely attached to and cover the collector regions ( 200 ) of the board body ( 20 ), and extend and contact the wires ( 202 ). As shown in Figure 2 again, the current collector (22) has an extension (222), and the extension (222) can be in contact with the wiring (202), and is electrically connected to the wiring (202), and finally As shown in the cathode collector plate (10) and the anode collector plate (14) in FIG. 1 . In the implementation of the process, the current collectors (22) can be pressed and bonded to the plate body (20) by spot welding or argon welding or bonding, and an adhesive (such as: Prepreg resin film, AB glue, etc.) enables the collector sheet (22) to be pressed and tightly connected to the plate body (20).

As shown in Figure 1, the collector area (200) of the collector plate (2) of the present utility model can be formed on the plate body of the anode collector plate (14) in the fuel cell (1), and it is attached and covered on these collectors. The collector sheets (140) of the electrical region (200) are in contact with the membrane electrode group (120) in the fuel cell (1). Furthermore, the surface of the anode collector plate (14) in contact with the flow channel plate (16), the thin metal layer in the range corresponding to these collector regions (200) can be removed by chemical etching or the like, or can be Anti-corrosion and/or anti-acid protection procedures are applied to the surface of the thin metal layer, such as: spraying a thin layer of Teflon, or pasting Prepreg resin film, or sputtering (electroplating) an anti-corrosion metal layer (such as gold , carbon, titanium, graphite, etc.).

In addition, as shown in Figure 2, the collector sheet (22) is provided with more than one through hole (220) to respectively correspond to the through holes (200a) within the range of the collector region (200), and the collector sheet (22) The pattern of the through holes (220) is consistent with that of the through holes (200a) within the range of the collector region (200). Thus, fuel or air can pass through the through hole (220), and then flow into the membrane electrode group (120) through the through hole (200a) of the plate body (20).

Figure 3 is a three-dimensional combined view of a variant embodiment of the collector plate (2) of Figure 2 . As shown in FIG. 3 , the arrangement of the plate body ( 30 ) and the through holes ( 34 ) of the current collector sheet ( 32 ) form a fence-like structure. And FIG. 4 shows a three-dimensional assembled view of another variant embodiment of the collector plate (2) in FIG. 2 . As shown in FIG. 4 , the arrangement of the plate body ( 40 ) and the through holes ( 44 ) of the current collector sheet ( 42 ) form a network structure. Figure 3 and Figure 4 are mainly used to illustrate that the type of the collector plate of the present invention is not limited to the type shown in Figure 2, and it can certainly have various types, and Figure 3 and Figure 4 are only one of them only one type.

The collector plate of the present utility model can be applied to various types of fuel cells, for example: applied to fuel cells using methanol fuel, or fuel cells using liquid fuel, fuel cells using gaseous fuel, fuel cells using solid fuel, etc. wait. Finally, the characteristics and effects of the present utility model are summarized as follows:

1. The current collector sheet used in the current collector plate of the present utility model has characteristics such as high conductivity and corrosion resistance and/or anti-acid chemical resistance, so the current collector plate of the present utility model has superior current collection capacity, and 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.

2. The collector sheet in the collector plate of the utility model can use a metal foil structure. Since the collector sheet is extremely light and thin, the volume and weight of the collector plate are greatly reduced, which will be beneficial to the application to in portable electronic products.

3. The manufacturing method of the current collector plate of the present utility model is to use the prefabricated current collector sheet, and then apply spot welding or bonding to press the current collector sheet to the plate body. In terms of the current process technology , is a very convenient and easy-to-achieve manufacturing method, so the collector plate of the present utility model is conducive to mass production.

Although the utility model has been described above with specific embodiments, the disclosed specific embodiments are not intended to limit the utility model. Such changes and retouches all belong to the category of the present utility model, so the scope of protection of the present utility model should be based on the claims.

Claims (16)

1. a collector plate that is used for fuel cell is characterized in that, comprising:

One plate body has at least more than one collector region;

Cabling more than at least one is arranged on the surface of this plate body; And

At least more than one prefabricated in advance collector plate is a kind of high conductivity material, and wherein those collector plates fit tightly and cover those collector regions of this plate body respectively, and extension is contacted with those cablings.

2. collector plate according to claim 1 is characterized in that: this collector plate has an extension, and this extension is contacted with this cabling, and it is connected in this cabling by electric property.

3. collector plate according to claim 1 is characterized in that: the base material of this plate body is a printed circuit board base board.

4. collector plate according to claim 3 is characterized in that: the base material of this plate body is to select in FR4 substrate, FR5 substrate, epoxy resin substrate, glass substrate, ceramic substrate, macromolecule plasticizing substrate or combined type material substrate.

5. collector plate according to claim 1 is characterized in that: this high conductivity material is a kind of chemical resistance material of anticorrosive and/or acid-proof.

6. collector plate according to claim 5 is characterized in that: this high conductivity material is to select in stainless steel material, gold copper-base alloy, titanium material, graphite material or carbon metallization laminate material.

7. collector plate according to claim 1 is characterized in that: this plate body has a plurality of through holes in this collector region scope.

8. collector plate according to claim 7, it is characterized in that: the through hole that this collector plate has at least more than one comes respectively those through holes in should the collector region scope, and the pattern of those through holes of this collector plate is consistent with those through holes in this collector region scope.

9. collector plate according to claim 7 is characterized in that: the layout of those through holes forms the fence type structure.

10. collector plate according to claim 7 is characterized in that: the layout of those through holes forms network structure.

11. collector plate according to claim 1 is characterized in that: those collector plates are by spot welding or argon welding or bonding mode and pressing is connected airtight to this plate body.

12. collector plate according to claim 1 is characterized in that: this cabling is the printing-type wiring.

13. collector plate according to claim 11 is characterized in that: those collector plates are to use adhesive and are connected airtight to this plate body by pressing.

14. collector plate according to claim 13 is characterized in that: this adhesive is a Prepreg resin film.

15. collector plate according to claim 13 is characterized in that: this adhesive is an AB glue.

16. collector plate according to claim 1 is characterized in that: those collector regions are the plate bodys that are formed at the anode collector plate; And fitting is covered in those collector plates of those collector regions, is contacted with those mea respectively.

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