Methanol fuel cell

Abstract

The utility model discloses a methanol fuel cell which comprises two end plates, a plurality of butt-joint holes are uniformly formed in the outer walls of the two end plates, the butt-joint holes are respectively connected with screws in a sliding manner in pairs, the outer walls of the screws are sleeved with insulating pads in a sliding manner, and two electrode plates are placed between the two end plates. Wherein an anode runner is formed in the outer wall of one electrode plate, a cathode runner is formed in the outer wall of the other electrode plate, a membrane electrode is placed between the two electrode plates, and a heating mechanism is arranged on the outer wall of the end plate. According to the utility model, the thermocouple detection point, the first electric heating rod jack and the second electric heating rod jack are arranged, and the working temperature of the battery is controlled to optimize the performance of the battery and improve the efficiency of the battery, so that the output power and the energy efficiency of the battery can be improved, and the stable operation of the battery under various environmental conditions can be ensured; and moreover, due to the overall integrated arrangement, the membrane electrode can be tested and maintained conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy device, especially relates to a methanol fuel cell. BACKGROUND

[0002] Methanol fuel cell refers to the direct use of methanol aqueous solution or steam methanol as fuel supply source of electric energy device, belongs to a kind of proton exchange membrane fuel cell. It does not need to use methanol, gasoline and natural gas reforming hydrogen for power generation, with clean fuel, environmental protection and other characteristics is the mainstream of future portable electronic product application. Methanol fuel cell converts the chemical energy of methanol into electrical energy through electrochemical reaction, and its core component is membrane electrode, which is composed of catalyst layer and proton exchange membrane, and its main function is to conduct protons and block electrons. Methanol fuel cell can directly use methanol aqueous solution or steam methanol as fuel supply source, without hydrogen production by reforming methanol, gasoline and natural gas for power generation. In addition, methanol fuel cell has potential application prospect in portable electronic products, such as power supply for mobile phones and other equipment. In terms of technical implementation, methanol fuel cell usually uses platinum-based catalyst, such as Pt / C catalyst or PtM / C alloy catalyst, to reduce the activation overpotential of the reaction and promote the rapid progress of electrode reaction. This battery system usually includes membrane electrode, bipolar plate, current collector plate and sealing gasket, etc. to ensure efficient electrochemical reaction and energy conversion.

[0003] In the prior art, the performance of methanol fuel cell is greatly affected by environmental temperature, and the performance of the battery decreases with the decrease of environmental temperature, and the lower the temperature, the more obvious the performance degradation. This means that without heating, methanol fuel cell needs to be in a certain temperature range to maintain good performance, otherwise the performance will decrease significantly, so we propose a methanol fuel cell to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the shortcomings in the prior art and proposes a methanol fuel cell.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A methanol fuel cell, comprising two end plates, a plurality of butt joints are uniformly arranged on the outer wall of the two end plates, a plurality of butt joints are respectively connected with screw rods in pairs, the outer wall of the screw rod is slidably sleeved with an insulating pad, two electrode plates are placed between the two end plates, the outer wall of one of the electrode plates is provided with an anode flow channel, the outer wall of the other electrode plate is provided with a cathode flow channel, a membrane electrode is placed between the two electrode plates, a heating mechanism is arranged on the outer wall of the end plate, a current collector plate is arranged at one end of the two electrode plates, and the current collector plate is located at one end of the end plate.

[0007] Preferably, the heating mechanism comprises two thermocouple detection points, and the two thermocouple detection points are respectively arranged on the outer walls of the two electrode plates, wherein the outer wall of one of the end plates is provided with a first electric heating rod insertion hole, and the outer wall of the other end plate is provided with a second electric heating rod insertion hole.

[0008] Preferably, the outer walls of the plurality of insulating pads are all pressed against the outer wall of one of the end plates, and the insulating pads not only play a role of packaging and supporting in the methanol fuel cell, but also improve the overall performance, stability and safety of the fuel cell through optimized design.

[0009] Preferably, the outer walls of the plurality of screws are all threadedly sleeved with nuts, and the outer walls of the plurality of nuts are all pressed against the outer wall of the other end plate, and the two end plates are fixed on the screws through tightening of the nuts.

[0010] Preferably, the outer walls of the two electrode plates are both provided with a plurality of assembly holes.

[0011] Preferably, the outer wall of one of the end plates is fixed with a pure methanol inlet pipe and a pure methanol outlet pipe, methanol water enters from the pure methanol inlet pipe, passes through the cathode flow channel, and gas generated from the pure methanol outlet pipe.

[0012] Preferably, the outer wall of the other end plate is fixed with an air inlet pipe and an air outlet pipe, air enters from the air inlet pipe, passes through the anode flow channel, and water generated flows out along the air outlet pipe.

[0013] Compared with the prior art, the methanol fuel cell has the following advantages:

[0014] The thermocouple detection points, the first electric heating rod insertion hole and the second electric heating rod insertion hole are arranged to control the working temperature of the battery, thereby optimizing the battery performance and improving the efficiency of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed in the specific implementation manner.

[0016] Fig. 1 A three-dimensional structure schematic diagram of the methanol fuel cell is provided.

[0017] Fig. 2 A kind of anode flow passage structure schematic diagram of methanol fuel cell is proposed for the utility model;

[0018] Fig. 3 A kind of cathode flow passage structure schematic diagram of methanol fuel cell is proposed for the utility model.

[0019] In the drawing: 1, end plate;2, screw;3, insulating pad;4, nut;5, electrode plate;6, assembly hole;7, membrane electrode;8, anode flow passage;9, cathode flow passage;10, thermocouple detection point;11, current collecting plate;12, first electric heating rod insertion hole;13, second electric heating rod insertion hole;14, pure methanol import pipe;15, pure methanol export pipe;16, air import pipe;17, air export pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application;The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] By Figs. 1-3As shown, it relates to a methanol fuel cell, including two end plates 1, the outer wall of each of the two end plates 1 is uniformly provided with a plurality of docking holes, and each pair of the plurality of docking holes is slidably connected with a screw rod 2. The outer wall of the screw rod 2 is slidably sleeved with an insulating pad 3. The insulating pad 3 also plays an insulating role in the fuel cell. The insulating pad 3 not only plays a packaging and supporting role in the methanol fuel cell, but also improves the overall performance, stability and safety of the fuel cell through optimized design.

[0023] The outer wall of each of the plurality of insulating pads 3 is pressed against the outer wall of one of the end plates 1. The outer wall of each of the plurality of screw rods 2 is threadedly sleeved with a nut 4. The outer wall of each of the plurality of nuts 4 is pressed against the outer wall of the other end plate 1. The two end plates 1 are fixedly installed in a manner that the plurality of screw rods 2 pass through the corresponding two docking holes respectively, and then the plurality of nuts 4 are screwed onto one end of the plurality of screw rods 2 in sequence. The two end plates 1 are fixed on the screw rods 2 by tightening the nuts 4, and the insulating pad 3 is located at the position of the screw head.

[0024] Two electrode plates 5 are placed between the two end plates 1. The outer wall of each of the two electrode plates 5 is provided with a plurality of assembly holes 6. The outer wall of one of the two electrode plates 5 is provided with an anode flow channel 8. The anode flow channel 8 is an important channel for gas and liquid transmission in the methanol fuel cell. The carbon dioxide gas generated by the reaction on the surface of the anode catalyst layer needs to be discharged through the anode flow channel 8 to avoid blockage and affect the performance of the battery. At the same time, methanol fuel also needs to be transported to the catalyst layer through the anode flow channel 8 for electrochemical reaction.

[0025] The outer wall of the other electrode plate 5 is provided with a cathode flow channel 9. The cathode flow channel 9 needs to effectively transport oxygen to the cathode catalyst layer to support the reduction reaction of hydrogen ions on the catalyst layer. The transmission efficiency of oxygen directly affects the output power and stability of the battery. The cathode flow channel 9 also needs to effectively manage the generation and discharge of water. In the methanol fuel cell, the cathode reaction produces water. If the water cannot be discharged in time, it will cause the cathode to be flooded, affecting the performance of the battery.

[0026] A membrane electrode 7 is placed between the two electrode plates 5. A current collector 11 is placed at one end of each of the two electrode plates 5. The current collector 11 is located at one end of the end plate 1. The main function of the current collector 11 is to effectively collect the electric current generated from the electrochemical reaction and transmit it to the external circuit.

[0027] The outer wall of the end plate 1 is provided with a heating mechanism. The heating mechanism includes two thermocouple detection points 10. The two thermocouple detection points 10 are respectively located on the outer wall of the two electrode plates 5. The thermocouple detection points 10 in the methanol fuel cell are mainly used for real-time monitoring of the temperature change in the battery. This plays an important role in ensuring the performance of the battery and prolonging its service life. Through temperature control and fault diagnosis, the operating efficiency and stability of the fuel cell can be effectively improved.

[0028] One of the end plate 1 of the outer wall is provided with a first electric heating rod insertion hole 12, the outer wall of the other end plate 1 is provided with a second electric heating rod insertion hole 13, the existing two electric heating rods are respectively through the first electric heating rod insertion hole 12 and the second electric heating rod insertion hole 13 and are slid into the assembly type installation, the electric heating rod in the methanol fuel cell is mainly used for optimizing the battery performance and improving its efficiency by controlling the working temperature of the battery, the power of the heating rod can be automatically adjusted according to the feedback signal of the thermocouple detection point 10, so as to maintain the set temperature, the thermocouple detection point 10 is connected with the existing equipment, including a temperature detection unit, a temperature setting unit and a temperature compensation unit, and can provide stable temperature control.

[0029] One of the end plate 1 of the outer wall is provided with a first electric heating rod insertion hole 12, the outer wall of the other end plate 1 is provided with a second electric heating rod insertion hole 13, the existing two electric heating rods are respectively through the first electric heating rod insertion hole 12 and the second electric heating rod insertion hole 13 and are slid into the assembly type installation, the electric heating rod in the methanol fuel cell is mainly used for optimizing the battery performance and improving its efficiency by controlling the working temperature of the battery, the power of the heating rod can be automatically adjusted according to the feedback signal of the thermocouple detection point 10, so as to maintain the set temperature, the thermocouple detection point 10 is connected with the existing equipment, including a temperature detection unit, a temperature setting unit and a temperature compensation unit, and can provide stable temperature control.

[0030] Working principle: in use, methanol water and oxygen in air react to produce; methanol water enters from the pure methanol inlet pipe 14, and the methanol water passes through the cathode flow channel 9 and generates electrons, hydrogen ions and carbon dioxide under the catalytic action of the membrane electrode 7, and the generated gas flows out from the pure methanol outlet pipe 15; air enters from the air inlet pipe 16, passes through the anode flow channel 8, reacts with hydrogen ions and oxygen through the proton exchange membrane of the membrane electrode 7 to produce water, and the generated water flows out along the air outlet pipe 17; through the above process, the generated electrons can generate electric energy from the overloading; the fuel stack flow channel adopts a grid flow channel; in the reaction process, the existing two electric heating rods are respectively slid into the first electric heating rod insertion hole 12 and the second electric heating rod insertion hole 13 and are assembled and installed, the electric heating rod heats the reaction process and maintains in a certain temperature environment, the thermocouple detection point 10 needs to test the reaction temperature in real time, so as to maintain a relatively stable temperature; at the same time, different types of membrane electrodes 7 can be replaced in the process, and the performance of different membrane electrodes 7 can be tested.

[0031] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, the conventional connection mode is adopted in the circuit connection, and the components known by the person skilled in the art are not described in detail, and the structure and principle thereof can be known by the person skilled in the art through a technical manual or through a conventional experimental method.

[0032] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A methanol fuel cell, comprising two end plates (1), characterized in that, Multiple docking holes are evenly provided on the outer walls of the two end plates (1). Each pair of docking holes is slidably connected to a screw (2). An insulating pad (3) is slidably fitted on the outer wall of the screw (2). Two electrode plates (5) are placed between the two end plates (1). An anode flow channel (8) is provided on the outer wall of one of the electrode plates (5), and a cathode flow channel (9) is provided on the outer wall of the other electrode plate (5). A membrane electrode (7) is placed between the two electrode plates (5). A heating mechanism is provided on the outer wall of the end plate (1). A current collector (11) is placed at one end of each of the two electrode plates (5). The current collector (11) is located at one end of the end plate (1).

2. A methanol fuel cell according to claim 1, characterized in that, The heating mechanism includes two thermocouple detection points (10), which are located on the outer walls of two electrode plates (5). One of the end plates (1) has a first electric heating rod insertion hole (12) on its outer wall, and the other end plate (1) has a second electric heating rod insertion hole (13) on its outer wall.

3. A methanol fuel cell according to claim 1, characterized in that, The outer walls of the plurality of insulating pads (3) are pressed against the outer wall of one of the end plates (1).

4. A methanol fuel cell according to claim 1, characterized in that, The outer walls of the multiple screws (2) are threaded with nuts (4), and the outer walls of the multiple nuts (4) are pressed against the outer wall of another end plate (1).

5. A methanol fuel cell according to claim 1, characterized in that, Multiple assembly holes (6) are provided on the outer walls of both electrode plates (5).

6. A methanol fuel cell according to claim 1, characterized in that, One of the end plates (1) has a pure methanol inlet pipe (14) and a pure methanol outlet pipe (15) fixedly connected to its outer wall.

7. A methanol fuel cell according to claim 1, characterized in that, The outer wall of the other end plate (1) is fixedly connected to an air inlet pipe (16) and an air outlet pipe (17).

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