A corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack

Abstract

The utility model discloses a corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack, belonging to the technical field of fuel cells, comprising a hydrogen inlet, a first end plate, a cathode plate, a membrane electrode, a second end plate, a hydrogen outlet and an anode plate; the utility model adopts an open cathode design, and replaces a traditional cathode graphite heat dissipation plate with a novel corrugated metal cathode plate, because the two sides of the corrugated metal cathode plate are tightly fitted with the membrane electrode and the first end plate respectively through a sealing process, the corrugated metal cathode plate has a flow channel structure, under the action of an external cooling fan, air can be brought into the stack through air convection, and a large amount of heat generated in the stack can be taken out at the same time, thereby enhancing the heat dissipation effect and working efficiency of the stack, and because the cathode plate is made of metal material, it has a lower resistance than the graphite plate heat dissipation, which can effectively reduce the loss of current in the transmission process, and further improve the output power of the stack.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to an air-cooled composite hydrogen fuel cell stack with a corrugated metal cathode plate. Background Art

[0002] As an energy device, fuel cells can directly and continuously convert the chemical energy in fuel into electrical energy with high conversion efficiency and no pollution. A fuel cell stack is a stack of multiple single cells connected in series to provide energy for electrical equipment. In the fuel cell stack assembly, the bipolar plate is the core component of the fuel cell stack, which plays the role of removing heat, supporting electric propulsion, collecting current and providing gas flow channels.

[0003] At present, graphite is the preferred material for bipolar plates of fuel cell stacks due to its advantages such as high conductivity, low density and long life. Fuel cell stacks will generate heat during normal operation. Excessive temperature will affect the normal operation of the membrane electrode. Therefore, the temperature of the fuel cell stack needs to be regulated. However, the current traditional graphite bipolar plate stack has limited heat dissipation capacity during operation and cannot fully meet the heat dissipation requirements of the fuel cell stack. Therefore, a corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack, comprising a hydrogen inlet, a first end plate, a cathode plate, a membrane electrode, a second end plate, a hydrogen outlet and an anode plate, wherein the cathode plates, membrane electrodes and anode electrodes are provided in a plurality, the cathode plate located at the top is attached between the membrane electrode and the first end plate, the plurality of cathode plates located in the middle are attached between the membrane electrode and the anode plate and the membrane electrode, the cathode plate located at the bottom is attached between the membrane electrode and the anode plate and the second end plate, the hydrogen inlet is connected to the top of the first end plate, and the hydrogen outlet is connected to the bottom of the second end plate.

[0006] By setting the above structure, the battery stack adopts an open cathode design, and replaces the traditional cathode graphite heat sink with a new corrugated metal cathode plate. Because the two sides of the corrugated metal cathode plate are tightly fitted with the membrane electrode and the first end plate through a sealing process, the corrugated metal cathode plate has a flow channel structure. Under the action of an external cooling fan, air can be brought into the battery stack through air convection, and a large amount of heat generated in the battery stack can be taken out at the same time, thereby enhancing the heat dissipation effect and working efficiency of the cell stack. Moreover, because the cathode plate is made of metal material, it has a lower resistance than the graphite plate heat dissipation, which can effectively reduce the loss of current in the transmission process, and further improve the output power of the battery stack.

[0007] As a preferred implementation, the hydrogen inlet and the hydrogen outlet are arranged diagonally.

[0008] As a preferred implementation, the anode plate is a graphite anode plate, and the cathode plate is a corrugated metal cathode plate.

[0009] As a preferred implementation, the cathode plate has a corrugated cross section, a length of the cathode plate of 10-50 cm, and a width of the cathode plate of 1-2 cm.

[0010] As a preferred embodiment, the material of the cathode plate is set to be copper, aluminum, titanium, aluminum alloy, titanium alloy, stainless steel or nickel-based alloy.

[0011] By setting a cathode plate, because the material of the cathode plate is set to copper, aluminum, titanium, aluminum alloy, titanium alloy, stainless steel or nickel-based alloy, it has a lower resistance than the graphite plate for heat dissipation, which can effectively reduce the loss of current in the transmission process and further improve the output power of the fuel cell stack.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model adopts an open cathode design and replaces the traditional cathode graphite heat sink with a new corrugated metal cathode plate. Because the two sides of the corrugated metal cathode plate are tightly fitted with the membrane electrode and the first end plate through a sealing process, the corrugated metal cathode plate has a flow channel structure. Under the action of an external cooling fan, air can be brought into the battery stack through air convection, and a large amount of heat generated in the battery stack can be taken out at the same time, thereby enhancing the heat dissipation effect and working efficiency of the cell stack. Moreover, because the cathode plate is made of metal material, it has a lower resistance than the graphite plate for heat dissipation, which can effectively reduce the loss of current in the transmission process, and further improve the output power of the battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] In the figure: 1. Hydrogen inlet; 2. First end plate; 3. Metal cathode plate; 4. Membrane electrode; 5. Second end plate; 6. Hydrogen outlet; 7. Graphite anode plate. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the embodiments.

[0017] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0018] See also Figure 1 The utility model provides a corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack, comprising a hydrogen inlet 1, a first end plate 2, a cathode plate, a membrane electrode 4, a second end plate 5, a hydrogen outlet 6 and an anode plate, wherein the number of the cathode plate, the membrane electrode 4 and the anode electrode is set to be a plurality, the anode plate is set to be a graphite anode plate 7, the cathode plate is set to be a corrugated metal cathode plate 3, the cross section of the cathode plate is corrugated, the length of the cathode plate is 10-50cm, the width of the cathode plate is 1-2cm, and the material of the cathode plate is set to be copper, aluminum, titanium, aluminum alloy, titanium alloy, stainless steel or nickel-based alloy. By setting the cathode plate, the cathode plate in the stack is flexible in design, simple in process, convenient in assembly and low in cost;

[0019] The cathode plate at the top is fitted between the membrane electrode 4 and the first end plate 2, the cathode plates in the middle are fitted between the membrane electrode 4 and the anode plate and the membrane electrode 4, the cathode plate at the bottom is fitted between the membrane electrode 4 and the anode plate and the second end plate 5, the hydrogen inlet 1 is connected to the top of the first end plate 2, the hydrogen outlet 6 is connected to the bottom of the second end plate 5, the hydrogen inlet 1 and the hydrogen outlet 6 are arranged diagonally, and by arranging the cathode plate, the membrane electrode 4 and the first end plate 2, the cathode plate, the membrane electrode 4 and the first end plate 2 are tightly fitted through a sealing process, which is convenient and simple and conducive to stacking.

[0020] The working principle and use process of the utility model are as follows: the anode plate, the membrane electrode 4, the cathode plate and the first end plate 2 are sealed through a sealing process to form a stack unit, and a customizable cooling fan is provided on one side of the stack unit. Air can be brought into the stack unit through the flow channel of the cathode plate under the action of an external working cooling fan to provide oxygen for the stack unit, and then hydrogen is introduced into the stack unit through the hydrogen inlet 1. At the same time, a large amount of heat generated in the stack is discharged from the inside under the action of the external working cooling fan.

[0021] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack, comprising a hydrogen inlet (1), a first end plate (2), a cathode plate, a membrane electrode (4), a second end plate (5), a hydrogen outlet (6) and an anode plate, characterized in that: The cathode plates, membrane electrodes (4) and anode electrodes are provided in a plurality of numbers. The cathode plate located at the top is attached between the membrane electrode (4) and the first end plate (2). The cathode plates located in the middle are attached between the membrane electrode (4), the anode plate and the membrane electrode (4). The cathode plate located at the bottom is attached between the membrane electrode (4), the anode plate and the second end plate (5). The hydrogen inlet (1) is connected to the top of the first end plate (2), and the hydrogen outlet (6) is connected to the bottom of the second end plate (5).

2. The corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack according to claim 1, characterized in that: The hydrogen inlet (1) and the hydrogen outlet (6) are arranged diagonally.

3. The corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack according to claim 1, characterized in that: The anode plate is a graphite anode plate (7), and the cathode plate is a corrugated metal cathode plate (3).

4. The corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack according to claim 1, characterized in that: The cathode plate has a corrugated cross section, a length of 10-50 cm, and a width of 1-2 cm.

5. The corrugated metal cathode plate air-cooled composite hydrogen fuel cell stack according to claim 1, characterized in that: The material of the cathode plate is set to be copper, aluminum, titanium, aluminum alloy, titanium alloy, stainless steel or nickel-based alloy.

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