CN215266396U

CN215266396U - Large-capacity direct methanol fuel cell stack

Info

Publication number: CN215266396U
Application number: CN202121149671.6U
Authority: CN
Inventors: 祝向齐; 刘绍华
Original assignee: Suzhou Ogawa New Energy Co ltd
Current assignee: Suzhou Ogawa New Energy Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-12-21
Anticipated expiration: 2031-05-26

Abstract

The utility model provides a direct methyl alcohol fuel cell of large capacity piles, including the battery pile body, the battery pile body has a plurality of bipolar plates, the bipolar plate two sides is anode surface and negative pole face, the bipolar plate upper end sets up the first input-output mouth of solution and the first input-output mouth of gas, the bipolar plate lower tip is provided with solution second input-output mouth and gaseous second input-output mouth, anode flow channel and cathode flow channel have many respectively, the port of all anode flow channels all connects in the first input-output mouth of solution and solution second input-output mouth, the port of all cathode flow channels all connects in gaseous first input-output mouth and gaseous second input-output mouth, make the interior flow increase of runner, more fully react with the catalyst, and the reaction efficiency is improved, thereby increase the electric energy output of battery pile.

Description

Large-capacity direct methanol fuel cell stack

Technical Field

The utility model particularly relates to a direct methanol fuel cell stack of large capacity.

Background

In the bipolar plate in the prior art, one flow channel generally corresponds to one input port and one output port, the input and output quantity is greatly limited, when the capacity needs to be increased, the stacking quantity needs to be increased, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a direct methanol fuel cell stack of large capacity.

In order to solve the technical problem, the utility model discloses a technical scheme is: a high-capacity direct methanol fuel cell stack comprises a stack body, end plates arranged at two ends of the stack body, the cell stack body comprises a plurality of bipolar plates, wherein the two surfaces of each bipolar plate are respectively an anode surface with an anode flow channel and a cathode surface with a cathode flow channel, the upper end part of the bipolar plate is provided with a first solution input/output port and a first gas input/output port which are arranged in parallel at the left and the right, the lower end part of the bipolar plate is provided with a second solution input/output port and a second gas input/output port which are arranged in parallel at the left and the right, the anode flow channel and the cathode flow channel are respectively provided with a plurality of parallel channels, two ends of the anode flow channel are respectively communicated with the first solution input-output port and the second solution input-output port, and two ends of the cathode flow channel are respectively communicated with the first gas input-output port and the second gas input-output port.

In certain embodiments, the solution first and second input-output ports, the gas first and second input-output ports are rectangular holes penetrating the anode and cathode faces, respectively.

In certain embodiments, the anode flow channels and the cathode flow channels are each a plurality of serpentine flow channels.

In some embodiments, the number of the anode flow channels is 3-5, the anode flow channels extend along the upper and lower serpentine routing directions, the number of the cathode flow channels is 22-26, and the cathode flow channels extend along the left and right serpentine routing directions.

In some embodiments, the upper and lower ends of the bipolar plate have an upper positioning hole and a lower positioning hole respectively, the upper positioning hole is located between the solution first input and output port and the gas first input and output port, and the lower positioning hole is located between the solution second input and output port and the gas second input and output port.

In some embodiments, the left side of the bipolar plate has an odd number of detents and the right side of the bipolar plate has an even number of detents.

The scope of the present invention is not limited to the technical solutions formed by specific combinations of the above technical features, and other technical solutions formed by arbitrary combinations of the above technical features or equivalent features should be covered. For example, the above features and the technical features (but not limited to) having similar functions disclosed in the present application are mutually replaced to form the technical solution.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model discloses an anode runner and cathode runner have many respectively, and all anode runner's port all is connected in the first input-output mouth of solution and solution second input-output mouth, and all cathode runner's port all is connected in gaseous first input-output mouth and gaseous second input-output mouth for flow increase in the runner, with catalyst more abundant reaction, improvement reaction efficiency, thereby increase the electric energy output of battery pile.

Drawings

FIG. 1 is a schematic diagram of an anode surface of a bipolar plate provided by the present invention;

FIG. 2 is a schematic view of the cathode side of a bipolar plate;

wherein, 1, the bipolar plate; 11. a first input/output port for the solution; 12. a first gas input/output port; 13. a second input/output port for the solution; 14. a second gas input/output port; 15. an upper positioning hole; 16. a lower positioning hole; 17. positioning a groove; 2. an anode face; 21. an anode flow channel; 3. a cathode face; 31. a cathode flow channel.

Detailed Description

The upper, lower, left and right directions of the present invention are based on the direction in the anode surface of the bipolar plate shown in fig. 1.

The utility model provides a direct methanol fuel cell stack, which comprises a cell stack body and end plates arranged at the two ends of the cell stack body.

The cell stack body comprises a plurality of bipolar plates 1, and a proton exchange membrane is arranged between every two adjacent bipolar plates 1. As shown in fig. 1-2, two sides of each bipolar plate are respectively an anode surface 2 with an anode flow channel 21 and a cathode surface 3 with a cathode flow channel 31, two opposite surfaces of two adjacent bipolar plates 1 are different, the upper end of the bipolar plate 1 is provided with a solution first input/output port 11 and a gas first input/output port 12 which are parallel to each other left and right, the lower end of the bipolar plate is provided with a solution second input/output port 13 and a gas second input/output port 14 which are parallel to each other left and right, two ends of the anode flow channel 21 are respectively communicated with the solution first input/output port 11 and the solution second input/output port 13, two ends of the cathode flow channel 31 are respectively communicated with the gas first input/output port 12 and the gas second input/output port 14, the upper and lower ends of the bipolar plate 1 are respectively provided with an upper positioning hole 15 and a lower positioning hole 16, the upper positioning hole 15 is positioned between the solution first input/output port 11 and the gas first input/output port 12, the lower positioning hole 16 is located between the second solution input/output port 13 and the second gas input/output port 14, the left side of the bipolar plate 1 is provided with odd number of positioning grooves 17, the right side of the bipolar plate 1 is provided with even number of positioning grooves 17, the anode flow channel 21 extends along the upper and lower snake-shaped wiring directions, the cathode flow channel 31 extends along the left and right snake-shaped wiring directions, meanwhile, the anode flow channel for inputting the methanol solution is less than the cathode flow channel for inputting the oxygen, so that the input amount of the oxygen or the air is increased, the methanol solution is subjected to sufficient reduction reaction at the cathode of the pile, and the use efficiency of the methanol solution is improved.

In this embodiment, the methanol solution enters the anode flow channel 21 from the first solution input/output port 11, after the full circulation reaction in the anode flow channel 21 is completed, hydrogen ions are generated and uniformly input to the proton exchange membrane, the generated carbon dioxide is discharged from the second solution input/output port 13 along with the excess moisture, oxygen is input into the cathode flow channel 31 from the first gas input/output port 12, the oxygen fully reacts with the hydrogen ions in the cathode flow channel 31, the generated water and gas are output from the second gas input/output port 14, and the electrons generated in the reaction process flow to make the cathode and the anode generate voltage, thereby realizing power supply.

The input quantity of the methanol solution and oxygen or air is enlarged by arranging a large solution input and output port and a large gas input and output port, so that the flow in the flow channel is increased, the flow is more fully reacted with the catalyst, the reaction efficiency is improved, and the electric energy output of the cell stack is increased.

As shown in fig. 1-2, the solution first input/output port 11 and the solution second input/output port 13, the gas first input/output port 12 and the gas second input/output port 14 are rectangular holes penetrating through the anode surface 2 and the cathode surface 3, respectively, the input/output ports are large, the delivery ports of the methanol solution and the air are ensured to be smooth, the reaction is ensured to be more sufficient, the battery capacity is increased, the anode runner 21 and the cathode runner 31 are both provided with a plurality of serpentine runners, the reaction is complete, the solution and the gas can be uniformly distributed, the reaction is stable, the output is stable, the anode runner 21 has 3 to 5 runners, the width of the runner ports is smaller than the size of the input/output ports, the length of the anode runner 21 is increased, the methanol solution and the catalyst have enough space to be fully fused, the reaction is promoted, the battery capacity is increased, the cathode runner 31 has 22 to 26 runners, the input gas is more strictly increased, so that the reaction is more sufficient and the waste of the methanol solution is reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a direct methanol fuel cell stack of large capacity, includes the stack body, set up in the end plate of stack body both ends, the stack body includes a plurality of bipolar plates (1), every bipolar plate (1) two sides are anode face (2) that have anode runner (21) and negative pole face (3) that have negative pole runner (31) respectively, its characterized in that: the bipolar plate comprises a bipolar plate (1), and is characterized in that a solution first input-output port (11) and a gas first input-output port (12) which are arranged in parallel from left to right are arranged at the upper end part of the bipolar plate (1), a solution second input-output port (13) and a gas second input-output port (14) which are arranged in parallel from left to right are arranged at the lower end part of the bipolar plate (1), a plurality of anode flow channels (21) and a plurality of cathode flow channels (31) are arranged in parallel, two ends of each anode flow channel (21) are respectively communicated with the solution first input-output port (11) and the solution second input-output port (13), and two ends of each cathode flow channel (31) are respectively communicated with the gas first input-output port (12) and the gas second input-output port (14).

2. The large capacity direct methanol fuel cell stack of claim 1, wherein: the first solution input and output port (11), the second solution input and output port (13), the first gas input and output port (12) and the second gas input and output port (14) are rectangular holes penetrating through the anode surface (2) and the cathode surface (3) respectively.

3. The large capacity direct methanol fuel cell stack of claim 1, wherein: the anode flow channel (21) and the cathode flow channel (31) are both a plurality of snake-shaped flow channels.

4. The large capacity direct methanol fuel cell stack of claim 3, wherein: the number of the anode flow channels (21) is 3-5, the anode flow channels (21) extend along the upper and lower snake-shaped wiring directions, the number of the cathode flow channels (31) is 22-26, and the number of the cathode flow channels (31) extend along the left and right snake-shaped wiring directions.

5. The large capacity direct methanol fuel cell stack of claim 1, wherein: the upper end part and the lower end part of the bipolar plate (1) are respectively provided with an upper positioning hole (15) and a lower positioning hole (16), the upper positioning hole (15) is positioned between the first solution input and output port (11) and the first gas input and output port (12), and the lower positioning hole (16) is positioned between the second solution input and output port (13) and the second gas input and output port (14).

6. The large capacity direct methanol fuel cell stack of claim 5, wherein: the left side of the bipolar plate (1) is provided with an odd number of positioning grooves (17), and the right side of the bipolar plate (1) is provided with an even number of positioning grooves (17).