CN100359742C - Flat-plate type direct methanol fuel cell and manufacturing method thereof - Google Patents

Abstract

The invention relates to a flat plate type direct methanol fuel cell, which comprises: the integrated cathode electrode plate comprises a first substrate, a plurality of cathode electrode areas which are formed on the front surface and the back surface of the first substrate in an electroplating mode and internally and densely distributed with a plurality of through holes, and a plurality of first conductive through holes which are arranged outside the cathode electrode areas and electrically connected to the cathode electrode areas through wires; a proton exchange membrane unit including a plurality of proton exchange membranes arranged opposite to the plurality of cathode electrode regions; an intermediate bonding layer composed of at least one bonding sheet, including a plurality of openings for respectively accommodating the plurality of proton exchange membrane members, and a plurality of second conductive through holes arranged opposite to the plurality of first conductive through holes; an integrated anode electrode plate comprising a second substrate, a plurality of anode electrode regions disposed opposite to the plurality of cathode electrode regions, and a plurality of third conductive contacts disposed opposite to the plurality of first conductive vias; and a runner floor.

Description

Flat-plate direct methanol fuel cell and manufacturing method thereof

technical field

The invention relates to a fuel cell, in particular to a structure of a thinned flat direct methanol fuel cell and a manufacturing method thereof.

Background technique

Direct Methanol Fuel Cell (DMFC) is a power generation device that uses liquid or gaseous diluted methanol aqueous solution as fuel to convert chemical energy into electricity through an electrochemical process. Compared with traditional power generation methods, direct methanol fuel cells have the advantages of low pollution, low noise, high energy density, and high energy conversion efficiency. Products, vehicles, military equipment, space industry, etc.

The operating principle of a direct methanol fuel cell is to oxidize methanol aqueous solution on the anode catalyst (catalyst) layer to generate hydrogen ions (H ⁺ ), electrons (e ^- ) and carbon dioxide (CO ₂ ), in which the hydrogen ions are transferred to the cathode through the electrolyte , and the electrons are transferred to the load through the external circuit to perform work and then transferred to the cathode. At this time, the oxygen supplied to the cathode will undergo a reduction reaction with hydrogen ions and electrons in the cathode catalyst layer, and produce water.

Fuel cells are generally composed of several basic units. Since the voltage that each basic unit can provide is very small, many basic units must be connected in series in order to achieve the required operating voltage output.

FIG. 1 and FIG. 2 respectively show a top plan view of a flat-plate direct methanol fuel cell 10 in the conventional technology and a schematic cross-sectional structure diagram along line I-I in FIG. 1 . As shown in FIGS. 1 and 2 , a conventional planar direct methanol fuel cell 10 includes a bipolar plate assembly 12 and a methanol fuel storage tank 14 . The bipolar plate assembly 12 includes an upper frame 51, a lower frame 52, a cathode electrode network 121, a plurality of bipolar metal electrode networks 122, 123, 124, 125 that have been twisted and folded, and an anode electrode network 126, and is sandwiched between two A plurality of proton exchange membrane elements (Membrane Electrode Assembly, MEA) 131, 132, 133, 134, 135 between the negative and positive electrode networks. The upper frame 51, the lower frame 52, the cathode electrode net 121, a plurality of bipolar metal electrode nets 122, 123, 124, 125 that have been twisted and folded, and the anode electrode net 126 are stacked alternately and sandwiched with leak-proof glue Or the epoxy resin 53 fixes the proton exchange membranes 131 , 132 , 133 , 134 , 135 therein, thereby forming five basic battery units 21 , 22 , 23 , 24 and 25 in series. The cathode electrode mesh 121 , the plurality of bipolar metal electrode meshes 122 , 123 , 124 , 125 that have undergone winding treatment, and the anode electrode mesh 126 are made of titanium metal mesh and gold-plated.

The traditional planar direct methanol fuel cell 10 includes five basic battery units 21, 22, 23, 24 and 25 connected in series, wherein the battery unit 21 is composed of a cathode electrode network 121, a proton exchange membrane 131 and a bipolar metal electrode network 122. Composition; the battery unit 22 is composed of a bipolar metal electrode network 122 (as the cathode of the battery unit 22), a proton exchange membrane 132 and a bipolar metal electrode network 123 (as the anode of the battery unit 22); the battery unit 23 is composed of a bipolar Metal electrode net 123 (as the cathode of battery unit 23), proton exchange membrane 133 and bipolar metal electrode net 124 (as the anode of battery unit 23) constitute; Battery unit 24 is made of bipolar metal electrode net 124 (as battery unit 24 cathode), proton exchange membrane 134 and bipolar metal electrode network 125 (as the anode of battery cell 24); 135 and the anode electrode network 126 constitute. Assuming that each basic battery unit can provide a voltage of 0.6 volts, the aforementioned five traditional flat-plate direct methanol fuel cells 10 connected in series can supply a voltage of 0.6×5=3.0 volts.

The disadvantage of the aforementioned conventional flat-plate direct methanol fuel cell 10 is that the upper and lower frames 51, 52 of the bipolar plate assembly 12 are made of glass-reinforced resin materials such as FR4. Further thinning requirements of portable electronic products. The electrode meshes 121 , 122 , 123 , 124 , 125 , and 126 of the aforementioned bipolar plate assembly 12 are all made of titanium metal mesh and gold-plated, which is very expensive. Furthermore, the plurality of folded bipolar metal electrode nets 122, 123, 124, 125 of the traditional flat-plate direct methanol fuel cell 10 are not integrated on the upper and lower frames, but need to be folded manually in advance. It is very troublesome and time-consuming, and it is not easy to achieve mass production scale.

Contents of the invention

In view of this, the main purpose of the present invention is to provide an improved flat-plate direct methanol fuel cell to improve the aforementioned shortcomings.

Another object of the present invention is to provide an improved method for manufacturing a flat-plate direct methanol fuel cell, so as to achieve a scale that can be produced in batches.

In order to achieve the above object, according to a preferred embodiment of the present invention, the present invention provides a flat plate direct methanol fuel cell, the structure of which includes:

An integrated cathode electrode plate, including a first base material, a plurality of cathode electrode regions, and a plurality of first conductive through holes, wherein the cathode electrode regions are formed on the front and back sides of the first substrate by electroplating, in which A plurality of perforations are densely covered, and the first conductive via is provided outside the cathode electrode area and is electrically connected to the cathode electrode area by wires;

a proton exchange membrane unit, including a plurality of proton exchange membranes, arranged relative to the plurality of cathode electrode regions;

The middle bonding layer is composed of at least one bonding sheet (Bonding Sheet), and includes a plurality of openings for respectively accommodating the plurality of proton exchange membranes and a plurality of second conductive through holes, relative to the A plurality of first conductive vias are arranged;

An integrated anode electrode plate, including a second substrate, a plurality of anode electrode regions arranged relative to the plurality of cathode electrode regions, and a plurality of third conductive contacts arranged relative to the plurality of first conductive through holes ; wherein the anode electrode area is formed on both sides of the second substrate by electroplating, and there are a plurality of perforations densely distributed therein; and

Runner floor;

Through the first conductive via hole on the first base material, the second conductive via hole of the intermediate bonding layer, and the third conductive contact on the second base material, the cathode electrode region on the first base material is connected to the second base material. The anode electrode area on the material constitutes a series configuration.

At the same time, the present invention also provides a method for making an integrated cathode electrode plate of a flat direct methanol fuel cell, comprising the following steps:

Provide a copper clad substrate (CCL), including a substrate, a first copper layer covering the upper surface of the substrate, and a second copper layer covering the lower surface of the substrate;

Performing a drilling process on the predetermined electrode area on the copper foil substrate to form a plurality of through holes penetrating through the first copper layer, the substrate and the second copper layer on the copper foil substrate; at the same time, outside the predetermined electrode area making a plurality of through holes;

Depositing an electroless copper layer on the copper foil substrate and in the plurality of through holes and through holes;

Defining a predetermined electrode area with photoresist on the copper foil substrate;

Carrying out an electroplating process, using the photoresist as an electroplating resist, electroplating a layer of electroplated copper layer on the area not covered by the photoresist, including the predetermined electrode area, and plating a layer of tin lead layer;

stripping the photoresist;

performing a copper etching process to etch away the chemical copper layer in the area not covered by the tin-lead layer and the first and second copper layers on the copper foil substrate;

Etching away the tin-lead layer to expose the electroplated copper layer;

forming a predetermined electrode region and conductive vias outside the predetermined electrode region;

coating a solder resist on areas other than the predetermined electrode area; and

A conductive protective layer is electroplated on the electroplated copper layer.

In order for readers to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only for reference and auxiliary description, and are not intended to limit the present invention.

Description of drawings

FIG. 1 shows a schematic top plan view of a flat-plate direct methanol fuel cell of conventional technology.

FIG. 2 shows a schematic cross-sectional structure diagram of a flat-plate direct methanol fuel cell of conventional technology along the line I-I in FIG. 1 .

Fig. 3 shows an exploded schematic view of various parts of the structure of the flat-type thinned direct methanol fuel cell according to the preferred embodiment of the present invention.

4 to 12 are schematic views illustrating the manufacturing method of the integrated thinned cathode electrode plate and the integrated thinned anode electrode plate in the planar thinned direct methanol fuel cell structure of the present invention.

Explanation of the symbols in the figure:

10 flat plate direct methanol fuel cell 12 bipolar plate assembly 14 methanol fuel storage tank

21 basic battery unit 22 basic battery unit 23 basic battery unit

24 basic battery unit 25 basic battery unit 30 copper foil substrate 32 substrate

34 copper layer 36 copper layer 42 perforation 46 chemical copper layer

48 photoresist 49 predetermined electrode area 51 upper frame 52 lower frame

53 epoxy resin 62 copper layer 64 tin-lead layer 72 solder resist

74 nickel gold protective layer 121 cathode electrode mesh 122 bipolar metal electrode mesh

123 bipolar metal electrode mesh 124 bipolar metal electrode mesh 125 bipolar metal electrode mesh

126 Anode Electrode Network 131 Proton Exchange Membrane 132 Proton Exchange Membrane

133 Proton Exchange Membrane 134 Proton Exchange Membrane 135 Proton Exchange Membrane

20 Flat-type Thin Direct Methanol Fuel Cells

200 integrated thin cathode electrode plate 201 cathode electrode area

202 Cathode electrode area 203 Cathode electrode area 204 Cathode electrode area

205 Cathode electrode area 210 Substrate 211 Conductive via 212 Conductive via

213 Conductive through hole 214 Conductive through hole 215 Conductive through hole 221 Fixed through hole

222 fixed through hole 223 fixed through hole 224 fixed through hole 250 wire

251 wire 252 wire 253 wire 254 wire 261 positive contact

300 Proton Exchange Membrane Unit 301 The First Proton Exchange Membrane Unit

302 The second proton exchange membrane 303 The third proton exchange membrane

304 The fourth proton exchange membrane 305 The fifth proton exchange membrane

400 middle bonding layer 401 opening 402 opening 403 opening

404 Hole 405 Hole 411 Conductive Via 412 Conductive Via

413 Conductive via 414 Conductive via 415 Conductive via 421 Fixed through hole

422 Fixed piercing 423 Fixed piercing 424 Fixed piercing

500 integrated thin anode electrode plate 501 anode electrode area

502 Anode electrode area 503 Anode electrode area 504 Anode electrode area

505 anode electrode area 511 conductive contact 512 conductive contact 513 conductive contact

514 conductive contact 515 conductive contact 521 fixed through hole 522 fixed through hole

523 Fixed hole 524 Fixed hole 600 Runner bottom plate 601 Fuel runner

621 Fixed hole 622 Fixed hole 623 Fixed hole 624 Fixed hole

Detailed ways

Please refer to FIG. 3 , which shows an exploded schematic view of various parts of the structure of a flat-type thinned direct methanol fuel cell 20 according to a preferred embodiment of the present invention. To simplify the description, the structure of the flat plate thinned direct methanol fuel cell 20 of the present invention is illustrated by taking five series-connected basic battery units as an example, but those skilled in the art should understand that the present invention is not limited to only five series-connected basic cells Units, fuel cells composed of other numbers of basic battery units are also within the scope of the application of the present invention. As shown in FIG. 3 , the structure of the flat plate thinned direct methanol fuel cell 20 of the present invention includes an integrated thinned cathode electrode plate 200, a proton exchange membrane (Membrane Electrode Assembly, MEA) unit 300, an intermediate bonding layer 400, An integrated thinned anode electrode plate 500 and a channel bottom plate 600 .

The integrated thinned cathode electrode plate 200 includes a substrate 210 , cathode electrode regions 201 , 202 , 203 , 204 and 205 , and conductive vias 211 , 212 , 213 , 214 and 215 . The surface of the substrate 210 other than the cathode electrode regions 201, 202, 203, 204 and 205 and the conductive vias 211, 212, 213, 214 and 215 is coated with solder resist green paint (Solder Resist). There are fixing through holes 221 , 222 , 223 and 224 at the four corners of the substrate 210 . The integrated thinned cathode electrode plate 200 is made in a method compatible with the printed circuit board (PCB) process, wherein the substrate 210 can be made of polymer fiber materials, such as ANSI grade FR-1, FR-2, FR -3, FR-4, CEM-1 or CEM-3 and so on. Each of the cathode electrode regions 201, 202, 203, 204 and 205 contains a plurality of perforations, and the opening ratio (defined as the ratio of the perforation area to the area of each cathode electrode region×100%) is preferably greater than 50%. The conductive through hole 212 on the substrate 210 is connected to the cathode electrode region 201 through the wire 250, the conductive through hole 213 is connected to the cathode electrode region 202 through the wire 251, and the conductive through hole 214 is connected to the cathode electrode region 203 through the wire 252. Conduction, the conductive via 215 is connected to the cathode electrode region 204 through the wire 253 . The cathode electrode region 205 is connected to a positive (cathode) contact 261 via a wire 254 . The conductive through hole 211 is used as a negative (anode) contact, and is connected with the positive contact 261 and an external circuit to form a circuit of the battery.

The proton exchange membrane unit 300 includes a first proton exchange membrane 301 , a second proton exchange membrane 302 , a third proton exchange membrane 303 , a fourth proton exchange membrane 304 and a fifth proton exchange membrane 305 . The proton exchange membranes in the proton exchange membrane unit 300 can use Nafion electrolyte membranes from DuPont, or other solid electrolyte membranes with the same function.

The intermediate bonding layer 400 is composed of at least one bonding sheet (Bonding Sheet). The bonding sheet can be made of PREPREG resin film and other materials in the partial polymerization stage (B-stage) commonly used in the printed circuit board manufacturing process. It can be heated at 120 ° C. Treat at high temperature for 30 minutes to reach full polymerization maturity. The middle bonding layer 400 includes five openings 401, 402, 403, 404 and 405 for respectively accommodating the first proton exchange membrane member 301, the second proton exchange membrane member 302, the third proton exchange membrane member 303, the fourth proton exchange membrane member The proton exchange membrane element 304 and the fifth proton exchange membrane element 305 . On one side of the opening 401 , at a position opposite to the conductive via 211 of the substrate 210 , a conductive via 411 is disposed. On the same sides of the openings 402 , 403 , 404 and 405 , corresponding to the positions of the conductive vias 212 , 213 , 214 and 215 of the substrate 210 , conductive vias 412 , 413 , 414 and 415 are provided. In other preferred embodiments of the present invention, the intermediate bonding layer 400 may further include a supporting layer, which is made of polymer fiber material, such as FR-1, FR-2, FR-3, FR-4, CEM-1 or CEM -3 and so on. The four corners of the intermediate bonding layer 400 are further provided with fixing through holes 421 , 422 , 423 and 424 relative to the fixing through holes 221 , 222 , 223 and 224 of the substrate 210 .

The integrated thinned anode electrode plate 500 includes a substrate 510 , anode electrode regions 501 , 502 , 503 , 504 and 505 , and conductive contacts 511 , 512 , 513 , 514 and 515 . Wherein, the conductive contacts 511 , 512 , 513 , 514 and 515 and the anode electrode regions 501 , 502 , 503 , 504 and 505 are defined simultaneously. Corresponding to the fixing through holes 221 , 222 , 223 and 224 of the base material 210 , fixing through holes 521 , 522 , 523 and 524 are further provided at the four corners of the base material 510 . The integrated thinned anode electrode plate 500 is also made in a method compatible with the printed circuit board (PCB) process, wherein the base material 510 can be made of polymer fiber material, such as FR-1, FR-2, FR of ANSI grade -3, FR-4, CEM-1 or CEM-3 and so on. Each of the anode electrode regions 501, 502, 503, 504 and 505 contains a plurality of perforations, and the opening ratio is preferably greater than 50%.

The flow channel bottom plate 600 has a preset fuel flow channel 601 and fixing through holes 221 , 222 , 223 and 224 relative to the substrate 210 , and fixing through holes 621 , 622 , 623 and 624 are also provided. The flow channel bottom plate 600 can be made of polymeric material, such as epoxy resin, polyimide or acrylic, etc., and the predetermined flow channel structure is washed out with a mechanical lathe, or made by injection molding. become. The runner structure is not the key point of the present invention, so it will not be described in detail.

During assembly, the integrated thinned cathode electrode plate 200 , the proton exchange membrane unit 300 , the intermediate bonding layer 400 and the integrated thinned cathode electrode plate 500 are stacked and bonded in sequence. Wherein, the conductive vias 211, 212, 213, 214, and 215 of the integrated thinned cathode electrode plate 200 are respectively aligned with the conductive vias 411, 412, 413, 414, and 415 of the intermediate bonding layer 400, and are aligned with the integrated thinner cathode electrode plate 200 respectively. The conductive contacts 511 , 512 , 513 , 514 and 515 of the anode electrode plate 500 are aligned and fixed by welding. In this way, the cathode electrode region 201 of the integrated thinned cathode electrode plate 200 is electrically connected to the integrated thinned anode electrode plate through the wire 250, the conductive vias 212 and 412, and the conductive contact 512 of the integrated thinned anode electrode plate 500 500 of the anode electrode region 502; and the cathode electrode region 202 of the integrated thinned cathode electrode plate 200 is electrically connected to the integrated The anode electrode region 503 of the type thinned anode electrode plate 500, and so on, constitute a fuel cell with five basic battery units connected in series. The conductive through hole 211 of the integrated thinned cathode electrode plate 200 (as the negative electrode of the fuel cell) is electrically connected to the conductive contact 511 of the integrated thinned anode electrode plate 500 and the anode through the conductive through hole 411 of the intermediate bonding layer 400 Electrode area 501 .

From the above, it can be seen that the integrated thinned cathode electrode plate 200 and the integrated thinned anode electrode plate 500 in the planar thinned direct methanol fuel cell 20 structure formed by the mature printed circuit board technology of the present invention are light, thin and convenient. Advantages of manufacturing. By means of the wire layout arranged on the base material, the control fuel cell and the external circuit can be further integrated.

Hereinafter, the manufacturing method of the integrated thinned cathode electrode plate 200 and the integrated thinned anode electrode plate 500 in the planar thinned direct methanol fuel cell 20 structure of the present invention will be described with reference to FIGS. 4 to 12 .

At first, please refer to Fig. 4, provide a copper clad substrate (Copper Clad Laminate, be called for short CCL) 30, its thickness is only a few centimeters, comprise a substrate 32, the copper layer 34 that covers the upper surface of the substrate 32 and cover the lower surface of the substrate 32 copper layer 36.

As shown in FIG. 5 , after the copper foil substrate 30 is cut into the required size, a drilling process is performed on the predetermined electrode area on the copper foil substrate 30 to form a plurality of through-copper layers on the copper foil substrate 30 34 , the substrate 32 and the through hole 42 of the copper layer 36 . According to a preferred embodiment of the present invention, the total area (opening ratio) of all the through holes 42 needs to account for more than 50% of the predetermined electrode area.

Next, as shown in FIG. 6 , an electroless copper layer 46 is deposited on the copper foil substrate 30 and inside the through hole 42 . The chemical copper layer 46 is deposited chemically instead of electroplating, so it is non-selectively and uniformly deposited on the copper foil substrate 30 and the inner wall of the through hole 42 .

As shown in FIG. 7 , a predetermined electrode region 49 is defined by a photoresist (dry film) 48 on the copper foil substrate 30 . Taking the production of the integrated thinned cathode electrode plate 200 in FIG. 3 as an example, the predetermined electrode area 49 defined by the photoresist 48 is the cathode electrode area 201-205, and the photoresist 48 simultaneously defines the wires 250-254 and the positive electrodes. Contact 261 (not shown in FIG. 7 ). In the integrated thinned cathode electrode plate 200 in FIG. 3 , the conductive through holes 211 - 215 are fabricated simultaneously with the through holes 42 in the predetermined electrode area. Taking the integrated thinned anode electrode plate 500 in FIG. 3 as an example, the predetermined electrode region 49 defined by the photoresist 48 is the anode electrode region 501-505, and the photoresist 48 defines the contact points 511-515 at the same time. And the connection area between the contact and the anode electrode area (not shown in FIG. 7 ).

As shown in Figure 8, then carry out electroplating process, use photoresist 48 as electroplating resist, in the area that is not covered by photoresist 48, comprise predetermined electrode area 49, electroplate one layer of copper layer 62 and on copper layer 62 A layer of tin-lead layer 64 is plated on it.

As shown in FIG. 9, the photoresist 48 is then stripped.

As shown in FIG. 10 , a copper etching process is performed to etch away the chemical copper layer 46 and the copper layers 34 and 36 on the copper foil substrate 30 in the area not covered by the tin-lead layer 64 . Then, another etching process is performed to etch away the tin-lead layer 64 to expose the copper layer 62 , thus initially completing the manufacture of the integrated thinned anode electrode plate 500 as shown in FIG. 3 .

However, if the integrated thinned cathode electrode plate 200 in FIG. 3 is manufactured, the steps in FIG. 11 and FIG. 12 need to be continued. As shown in FIG. 11 , in order to avoid damage to the substrate or short circuit during the subsequent soldering process, a solder resist (commonly known as green paint) 72 needs to be coated. The solder resist is commonly used in the printed circuit board industry. It is made of light-sensitive materials, and traditional yellow light lithography can be used to define areas on the electrode plate 200 that need to be protected.

Next, as shown in FIG. 12 , in order to prevent the integrated thinned cathode electrode plate 200 from being oxidized when exposed to air for a long time, an electroplating process can be performed to further plate a nickel-gold protective layer 74 on the electrode.

To sum up, compared with the traditional technology, the improved planar thinned direct methanol fuel cell structure of the present invention at least includes the following advantages:

(1) The key components of the fuel cell structure, including the integrated thinned cathode electrode plate 200 and the integrated thinned anode electrode plate 500, are all made of printed circuit board technology, and the use of copper foil substrate as the starting substrate can reduce fuel consumption. The cost of manufacturing the battery.

(2) The key components of the fuel cell structure are produced by mature printed circuit board technology, including the integrated thinned cathode electrode plate 200 and the integrated thinned anode electrode plate 500 , which can be mass-produced by a double-sided process.

(3) The integrated thinned cathode electrode plate 200 and the integrated thinned anode electrode plate 500 of the present invention do not need to manually fold the electrode net as in the traditional technique, so they can be mass-produced, and the direct stacking assembly is more precise and convenient.

(4) Manufactured with printed circuit board technology, the integrated control circuit for controlling the lithium battery and the fuel cell can be integrated on the substrate at the same time, increasing the utilization value of the fuel cell.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the content of the present invention shall fall within the scope of protection of the present invention.

Claims (12)

1. A flat plate direct methanol fuel cell, characterized in that it comprises: An integrated cathode electrode plate, including a first base material, a plurality of cathode electrode regions, and a plurality of first conductive through holes, wherein the cathode electrode regions are formed on the front and back sides of the first substrate by electroplating, in which A plurality of perforations are densely covered, and the first conductive via is provided outside the cathode electrode area and is electrically connected to the cathode electrode area by wires; a proton exchange membrane unit, including a plurality of proton exchange membranes, arranged relative to the plurality of cathode electrode regions; The middle bonding layer is composed of at least one layer of bonding sheets, and contains a plurality of openings for respectively accommodating the plurality of proton exchange membranes, and a plurality of second conductive through holes, relative to the plurality of first Conductive vias are configured; An integrated anode electrode plate, including a second substrate, a plurality of anode electrode regions arranged relative to the plurality of cathode electrode regions, and a plurality of third conductive contacts arranged relative to the plurality of first conductive through holes ; wherein the anode electrode area is formed on both sides of the second substrate by electroplating, and there are a plurality of perforations densely distributed therein; and Runner floor; When assembling, the integrated cathode electrode plate, the proton exchange membrane unit, the intermediate bonding layer and the integrated anode electrode plate are sequentially stacked and bonded; wherein the integrated cathode electrode The first conductive through holes of the plate are respectively aligned with the second conductive through holes of the intermediate bonding layer, and at the same time are aligned with the third conductive contacts of the integrated anode electrode plate, and are respectively fixed by welding; The first conductive through hole, the second conductive through hole of the intermediate bonding layer, and the third conductive contact on the second substrate make the cathode electrode region on the first substrate and the anode electrode region on the second substrate constitute Serial configuration. 2. The planar direct methanol fuel cell as claimed in claim 1, wherein said cathode electrode region comprises a bottom layer of copper, an electroless copper layer disposed on the bottom layer copper, an electroplated copper layer disposed on the electroless copper layer layer, and a conductive protective layer on the electroplated copper layer. 3. The flat-plate direct methanol fuel cell as claimed in claim 2, wherein the conductive protection layer is a nickel-gold plating layer. 4. The flat-plate direct methanol fuel cell as claimed in claim 1, wherein said proton exchange membrane is a solid electrolyte membrane. 5. The planar direct methanol fuel cell as claimed in claim 1, wherein the bonding sheet is a partially polymerized PREPREG resin film used in the process of printing circuit boards. 6. The flat-plate direct methanol fuel cell as claimed in claim 1, wherein the bonding sheet is a bonding sheet in which the PREPREG resin film in the partial polymerization stage is treated at a temperature of 120° C. for 30 minutes to reach a fully polymerized ripening degree. 7. The flat-plate direct methanol fuel cell as claimed in claim 1, wherein the first substrate is made of polymer fiber material. 8. The planar direct methanol fuel cell according to claim 7, wherein the first substrate is ANSI grade FR-1, FR-2, FR-3, FR-4, CEM-1 or CEM-3 Made of polymer fiber material. 9. A method for making an integrated cathode electrode plate for a flat direct methanol fuel cell, comprising: A copper foil substrate is provided, including a substrate, a first copper layer covering the upper surface of the substrate, and a second copper layer covering the lower surface of the substrate; performing a drilling process on the predetermined electrode area on the copper foil substrate to form a plurality of through holes penetrating through the first copper layer, the substrate and the second copper layer on the copper foil substrate; at the same time, outside the predetermined electrode area making a plurality of through holes; Depositing an electroless copper layer on the copper foil substrate and in the plurality of through holes and through holes; Defining a predetermined electrode area with photoresist on the copper foil substrate; Carrying out an electroplating process, using the photoresist as an electroplating resist, electroplating a layer of electroplated copper layer on the area not covered by the photoresist, including the predetermined electrode area, and plating a layer of tin lead layer; stripping the photoresist; performing a copper etching process to etch away the chemical copper layer in the area not covered by the tin-lead layer and the first and second copper layers on the copper foil substrate; and Etching the tin-lead layer to expose the electroplated copper layer; to preliminarily complete the fabrication of the electrode area and the conductive via holes outside the electrode area. 10. The method as claimed in claim 9, wherein after etching away said tin-lead layer, the method further comprises the following steps: coating a solder resist on areas other than the predetermined electrode area; and A conductive protective layer is electroplated on the electroplated copper layer. 11. The method of claim 10, wherein the conductive protective layer is a nickel-gold layer. 12. The method of claim 9, wherein the plurality of through holes occupy an area larger than 50% of the area of the predetermined electrode area.

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