TWI398983B - Used in direct methanol fuel cell magnetic micro-pump and its direct methanol fuel cell - Google Patents

Description

Magnetic micro-pull for direct methanol fuel cell and its direct methanol fuel cell

The present invention relates to a fuel cell device, and more particularly to a direct methanol fuel cell device having a magnetic micro-pump.

The Republic of China invention patent case No. I232005 "Manufacturing method of laminated integrated direct methanol fuel cell and its laminated integrated direct methanol fuel cell" discloses that a method for manufacturing a laminated integrated direct methanol fuel cell comprises the following steps: using a printed circuit The material of the plate is used to form a flow channel groove/solution tank layer; the mass transfer electrolyte layer is formed; the control circuit layer is fabricated by the process of the printed circuit board; the flow channel groove/solution groove layer and the quality pass respectively are prepared separately Each layer such as an electrolyte layer and a control circuit layer is joined to form a laminated integrated direct methanol fuel cell.

US Patent Publication No. 2004/0062964A1, "Direct Methanol Fuel Cell System", discloses a fuel cell system directly using a methanol solution, which is provided with a fuel supply unit for transporting a methanol solution. And the means of transport is to use the pump.

The inventors of the present invention have made an improvement in the realization of miniaturization or even miniaturization of a direct methanol fuel cell in view of the above-mentioned related art, so that the inventors have improved, and the invention is particularly suitable for miniaturization or even The magnetic micro-pump for miniaturizing direct methanol fuel cells, and the invention have improved a miniaturized or even miniaturized direct methanol fuel cell with a magnetic micro-pump.

The invention provides a direct methanol fuel cell and a magnetic micro-pump applied to the direct methanol fuel cell, which makes it easier to realize miniaturization or even miniaturization of a direct methanol fuel cell.

In order to achieve the above object of the present invention, the present invention provides a magnetic micro-pump applied to a direct methanol fuel cell, comprising: a motor for rotating a turntable; a bottom plate for fixing the motor; and a first plate system stacking And a magnetic liquid flow path is disposed on the bottom plate, wherein the magnetic liquid flow path is used for sealing a magnetic liquid; a second plate system is stacked on a waterproof film, and a fuel flow path is disposed; a film sandwiched between the first plate body and the second plate body; a third plate system stacked on the second plate body, and configured to receive the turntable, and an inlet and an outlet And one end of the inlet and one end of the outlet are respectively sealed to the two ends of the fuel flow passage, and a methanol solution flows in from the inlet and flows through the fuel flow passage and then flows out from the outlet: the turntable is set At least one or more magnetic elements, wherein the magnetic elements are used to magnetically adsorb the magnetic liquid, such that the film is pressed to the portion of the fuel flow path and then pressed into the fuel flow path The methanol solution.

Furthermore, the present invention provides a direct methanol fuel cell comprising the magnetic micro-pull as described above, comprising: the magnetic micro-pull, an anode flow channel plate, a first current collecting tab, a membrane electrode assembly, and a second The collector tab and the cathode runner plate are stacked from top to bottom.

In order for the reviewing committee to have a deeper understanding and understanding of the structure, features and efficacy of the present invention, the preferred embodiments are described in detail below with reference to the drawings:

The first figure shows a perspective view of a direct methanol fuel cell of the present invention, the second figure shows an exploded view of the direct methanol fuel cell of the present invention, and the third figure shows a perspective view of the magnetic micro-pump of the present invention applied to a direct methanol fuel cell, and a fourth The figure shows an exploded view of a magnetic micro-pump applied to a direct methanol fuel cell of the present invention. The direct methanol fuel cell 10 of the present invention mainly utilizes a magnetic micro-pump 20 as a power source for propelling the flow of the methanol solution. Due to the structural characteristics of the magnetic micro-pump 20 of the present invention, the direct methanol fuel cell 10 can be further improved. In order to easily realize miniaturization of direct methanol fuel cells, even miniaturization of direct methanol fuel cells. First, the magnetic micro-push 20 of the present invention will be described in detail. The magnetic micro-push 20 includes a motor 201, a bottom plate 202, a first plate 203, a waterproof film 204, a second plate 205, a third plate 206, and a turntable. 207, respectively, the following text is explained.

The motor 201 is used to drive the rotation of the turntable 207. The rotating shaft 201a of the motor 201 runs through the first plate body 203, the waterproof film 204, the second plate body 204 and the third plate body 206, and the end of the rotating shaft 201a is coupled to the turntable. 207 is fixed. The motor 201 can be fixed to the bottom plate 202, and the motor 201 can be, for example, a low power DC motor.

Referring to FIG. 5A, the first plate body 203 is stacked on the bottom plate 202, and the magnetic liquid flow path 203a is provided, and the magnetic liquid flow path 203a is used for sealing the magnetic liquid 203b, and the sealed magnetic liquid 203b is received by the turntable. When the magnetic attraction force of the magnetic member 207a of 207 is affected, a part of the magnetic liquid 203b affected by the magnetic attraction force is moved toward the waterproof film 204, and is pressed against the waterproof film 204. FIG. 5B is a structural view showing a specific embodiment of the first plate body 203. The first plate body 203 is formed by stacking three pieces of the sheets 2031, 2032, and 2033, wherein the uppermost layer 2031 and the lowermost layer are formed. The sheet 2033 can be a film such as a polydimethysiloxane (PDMS) film. The sheet 2032 of the intermediate layer is provided with a magnetic liquid flow path 203a, and the magnetic liquid flow path 203a can adopt, for example, a structure in which a hollow trench is formed, and this hollow trench can be used to accommodate the magnetic liquid 203b. The sheet 2032 can be a thick film, such as a thicker PDMS film, or other materials.

Referring to the sixth drawing, the second plate body 205 is stacked on the waterproof film 204, and is provided with a fuel flow path 205a. The fuel flow path 205a of the second plate body 205 faces the waterproof film 204. The fuel flow path 205a may, for example, be constructed in a semi-arc-shaped ditch, and this ditch may be used to circulate a methanol solution. The methanol solution flows in from the end 205b of the fuel flow path 205a and flows out from the end 205c.

The waterproof film 204 is interposed between the first plate body 203 and the second plate body 205. Since the waterproof film 204 closely covers the fuel flow path 205a of the second plate body 205, the methanol solution located in the fuel flow path 205a is not extravasated. The waterproof film 204 may be a film such as a PDMS film or other tough waterproof material.

Referring to the seventh figure, the third board 206 is stacked on the second board 205 and is used to receive the turntable 207. Furthermore, the third plate 206 may further be provided with an inlet 206a and an outlet 206b, and one end of the inlet 206a may be connected to the fuel tank 30 (please refer to the eighth figure), and the other end thereof is in close contact with the end of the fuel flow path 205a. 205b. One end of the outlet 206b may be connected to the inlet 101a of the anode flow path plate 101, and the other end thereof is in close contact with the end 205c of the fuel flow path 205a.

Furthermore, the inlet 206a and the outlet 206b can be modified to be disposed on the second plate 205, and the inlet 206a and the outlet 206b are connected to the ends 205b and 205c, respectively.

Referring to the seventh figure, the turntable 207 is provided with at least one or more magnetic elements 207a for magnetically absorbing the magnetic liquid 203b. The magnetic member 207a may be a permanent magnet, and the magnetic members 207a are evenly distributed on the turntable 207.

The bottom plate 202, the first plate body 203, the waterproof film 204, the second plate body 205, and the third plate body 206 may be pressed together by a lamination technique, or may be screwed by a screwing means. together. The material of the bottom plate 202 can be selected, for example, one of acrylic, metal, hard plastic, and glass fiber. The material of the second plate body 205 and the third plate body 206 may be, for example, one of acrylic, non-magnetic metal, hard plastic, and glass fiber. The material of the first plate body 203, the waterproof film 204, and the second plate body 205 is selected to be a material that allows magnetic force to pass therethrough.

The number of the magnetic liquid flow paths 203a provided in the first plate body 203 may be at least one or more. The number of the fuel flow paths 205a provided in the second plate body 205 may be at least one or more. The number of the turntables 207 housed in the third plate body 206 may be at least one or more. The number of motors 201 described above may be at least one or more.

Next, the direct methanol fuel cell 10 of the present invention will be described in detail. The direct methanol fuel cell 10 includes a magnetic micro-pump 20, an anode flow channel plate 101, a first current collecting tab 103, a membrane electrode assembly 105, and a second current collecting tab 107. And the cathode runner plate 109, the above components are stacked together from top to bottom. For ease of understanding of the present invention, we define a module 10a that includes an anode flow channel plate 101, a first current collector tab 103, a membrane electrode assembly 105, a second collector tab 107, and a cathode runner. Board 109. The components are described in detail separately, as follows.

The magnetic micro-pump 20 used in the direct methanol fuel cell 10 has been disclosed above and therefore will not be repeated.

The anode flow path plate 101 is provided with an anode flow path 101c, an inlet 101a, and an outlet 101b. The methanol solution flows in from the inlet 101a, flows through the anode flow path 101c, and finally flows out from the outlet 101b. The anode runner plate 101 can be fabricated using conventional techniques.

The first collector tab 103 and the second collector tab 107 can be fabricated using conventional techniques, such as a metal sheet having a network structure with a plurality of hollow holes.

The membrane electrode assembly 105 can directly adopt a membrane electrode assembly having a proton exchange membrane, and the number of membrane electrode groups 105 is not limited to one.

The cathode flow path plate 109 is provided with a plurality of through holes 109a to allow air to flow into the cathode of the membrane electrode group 105. The cathode runner plate 109 can be fabricated using conventional techniques. Furthermore, the cathode runner plate 109 can be replaced by a cover plate having a cathode runner.

The magnetic micro-pump 20, the anode flow channel plate 101, the first current collecting tab 103, the membrane electrode assembly 105, the second current collecting tab 107, and the cathode runner plate 109 can be pressed by a lamination technique. Close together, or screwed together by screwing.

Referring to the eighth figure, the methanol solution 40 of the fuel tank 30 flows into the interior of the magnetic micro-pump 20 through the inlet 206a. The motor 201 of the magnetic micro-pump 20 rotates to drive the rotation of the turntable 207. The magnetic member 207a on the rotating turntable 207 magnetically adsorbs the magnetic liquid 207b in a predetermined direction and at intervals, so that the waterproof film 204 is pressed to the partial fuel flow path 205a along the predetermined direction, thereby being pressed to the fuel flow. The methanol solution of 205a in the channel, thus pushing the flow of the methanol solution. The methanol solution located inside the magnetic micro-pump 20 flows out from the outlet 206b, flows into the inlet 101a of the anode flow path plate 101, then flows through the anode flow path 101c, flows out from the outlet 101b, and finally flows back to the fuel tank 30.

The direct methanol fuel cell of the present invention makes it easier to realize miniaturization or even miniaturization of a direct methanol fuel cell by using a specially designed magnetic micro-pump, which is an improvement of the present invention.

However, the above-mentioned preferred embodiments of the present invention are not intended to limit the scope of the present invention, and those skilled in the art can clearly make changes and modifications. The substance of the invention.

10. . . Direct methanol fuel cell

10a. . . Module

20. . . Magnetic micro pump

30. . . Fuel tank

40. . . Methanol solution

101. . . Anode flow channel plate

101c. . . Anode flow path

101a. . . Entrance

101b. . . Export

103. . . First collector

105. . . Membrane electrode set

107. . . Second collector

109. . . Cathode runner plate

109a. . . Through hole

201. . . motor

201a. . . Rotating shaft

202. . . Bottom plate

203. . . First plate

203a. . . Magnetic liquid flow path

203b. . . Magnetic liquid

2031, 2032, 2033. . . Sheet

204. . . Waterproof film

205. . . Second plate

205a. . . Fuel flow channel

205b, 205c. . . End

206. . . Third plate

206a. . . Entrance

206b. . . Export

207. . . Turntable

207a. . . Magnetic component

The first figure shows a perspective view of a direct methanol fuel cell of the present invention.

The second figure shows an exploded view of the direct methanol fuel cell of the present invention.

The third figure shows a perspective view of a magnetic micro-pump applied to a direct methanol fuel cell of the present invention.

The fourth figure shows an exploded view of the magnetic micro-pump applied to the direct methanol fuel cell of the present invention.

Fig. 5A is a view showing the structure of the first plate of the magnetic micro-push of the present invention.

Figure 5B is a structural view showing a specific embodiment of the first plate of Figure 5A of the present invention.

Fig. 6 is a structural exploded view showing the second plate of the magnetic micro-push of the present invention.

Fig. 7 is a view showing the structure of a third plate of the magnetic micro-push of the present invention.

The eighth figure shows a schematic diagram of the application state of the direct methanol fuel cell of the present invention.

10. . . Direct methanol fuel cell

10a. . . Module

20. . . Magnetic micro pump

101b. . . Export

206a. . . Entrance

Claims (11)

A magnetic micro-pump for a direct methanol fuel cell, comprising: a motor for rotating a turntable; a bottom plate for fixing the motor; a first plate stacked on the bottom plate, and Providing a magnetic liquid flow path for sealing a magnetic liquid; a second plate stacked on a waterproof film; and a fuel flow path; the waterproof film, the clip And disposed between the first plate body and the second plate body; a third plate body is stacked on the second plate body, and is configured to receive the turntable, and is provided with an inlet and an outlet, wherein One end of the inlet and one end of the outlet are respectively sealed to the two ends of the fuel flow passage, and a methanol solution flows from the inlet and flows through the fuel flow passage and then flows out from the outlet; the turntable is set at least More than one magnetic element, wherein the magnetic elements are used to magnetically adsorb the magnetic liquid such that the waterproof film is pressed to a portion of the fuel flow path to be pressed to the methanol solution located in the fuel flow path. The magnetic micro-pump described in claim 1 further includes: a plurality of magnetic liquid flow paths, a plurality of fuel flow paths, a plurality of turntables, and a plurality of motors. The magnetic micro-pump according to claim 1, wherein the material of the bottom plate is selected from the group consisting of: an acrylic, a metal, a rigid plastic, and a glass fiber; and the second plate and the The material of the third plate is selected from the group consisting of an acrylic, a non-magnetic metal, a rigid plastic, and a glass fiber. The magnetic micro-pump according to claim 1, wherein the bottom plate, the first plate body, The waterproof film, the second plate, and the third plate are laminated together or screwed together. The magnetic micro-pump according to claim 1, wherein the magnetic components are a permanent magnet, and the magnetic components are evenly distributed on the turntable. The magnetic micro-pump according to claim 1, wherein the first plate system is formed by stacking three pieces of the film, wherein the uppermost layer and the lowermost one are respectively a film. And the sheet system located in the intermediate layer sets the magnetic liquid flow path. The magnetic micro-pump according to claim 1, wherein the third plate inlet and outlet are reconfigurably disposed in the second plate, wherein the inlet and the outlet are respectively connected to the fuel flow channel. End. A direct methanol fuel cell comprising a magnetic micro-pump as described in claim 1, comprising: the magnetic micro-pump, an anode flow channel plate, a first current collecting piece, a membrane electrode group, a first The two collector sheets and the cathode channel plate are stacked from top to bottom. The direct methanol fuel cell of claim 8, wherein the cathode flow channel plate is replaced by a cover plate having a cathode flow path. The direct methanol fuel cell of claim 8, wherein the magnetic micro-pump, the anode flow channel plate, the first current collecting tab, the membrane electrode assembly, the second current collecting tab, and the cathode current The slabs are laminated together or tied together. The direct methanol fuel cell according to claim 8, wherein the membrane electrode assembly is a membrane electrode assembly having a proton exchange membrane.