Fuel cell metal bipolar plate

Abstract

The utility model discloses a fuel cell metal bipolar plate, including anode plate, cathode plate and the air cooling board between anode plate, cathode plate, anode plate, cathode plate each one end all has hydrogen inlet, reaction air inlet, each other end all has hydrogen outlet, reaction air outlet, air cooling board one side has cooling air inlet, and the other side has cooling air outlet, air cooling board is alternately provided with a number of the upflow channel groove to anode plate and a number of the downflow channel groove to cathode plate along the length direction, the opening width of upflow channel groove is less than the width of upflow channel groove bottom, and the opening width of downflow channel groove is less than the width of downflow channel groove bottom. The utility model discloses fuel cell metal bipolar plate has increased air cooling board and anode plate, cathode plate contact area, has reduced the probability of damage to anode plate, cathode plate each groove and ridge strip, has improved bipolar plate assembly whole's pressure -resistance and heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a metal bipolar plate for fuel cells. Background Technology

[0002] With the increasing use of traditional energy sources such as fossil fuels, people are seeking new energy technologies to replace them in order to reduce environmental pollution and harm to organisms. Hydrogen fuel cells are electrochemical power generation devices that convert chemical energy into electrical energy. A single cell consists of electrodes, membrane electrode assemblies (MEAs), and corresponding sealing components. Hydrogen gas flows through channels in the electrodes, undergoing oxidation on one side of the MEA and reduction on the other. This process creates an electron flow in the external circuit, generating electricity. The entire process is pollution-free, emission-free, and produces only water as a byproduct, making it a clean energy conversion device. Therefore, it has received attention and importance from various countries, becoming a research hotspot and is now widely used. However, the overall pressure resistance and heat dissipation performance of existing fuel cell metal bipolar plates need further improvement. Summary of the Invention

[0003] The purpose of this invention is to provide a metal bipolar plate for fuel cells. This metal bipolar plate increases the contact area between the air cooling plate and the anode and cathode plates, reduces the probability of damage to the grooves and ridges of the anode and cathode plates, and improves the overall pressure resistance and heat dissipation performance of the bipolar plate assembly.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a metal bipolar plate for a fuel cell, comprising an anode plate, a cathode plate, and an air cooling plate located between the anode plate and the cathode plate. Each of the anode plate and the cathode plate has a hydrogen inlet and a reaction air inlet at one end, and a hydrogen outlet and a reaction air outlet at the other end. The air cooling plate has a cooling air inlet on one side and a cooling air outlet on the other side.

[0005] The anode plate has a plurality of first grooves on the surface opposite to the air cooling plate, and adjacent first grooves are separated by first ridges. The cathode plate has a plurality of second grooves on the surface opposite to the air cooling plate, and adjacent second grooves are separated by second ridges.

[0006] The air cooling plate has several upper flow channel grooves facing the anode plate and several lower flow channel grooves facing the cathode plate alternately arranged along its length. The opening width of the upper flow channel groove is smaller than the width of the bottom of the upper flow channel groove, and the opening width of the lower flow channel groove is smaller than the width of the bottom of the lower flow channel groove.

[0007] The following are further improvements to the above technical solution:

[0008] 1. In the above scheme, the width of the bottom of the upper flow channel is 1 to 2 times the opening width of the upper flow channel, and the width of the bottom of the lower flow channel is 1 to 2 times the opening width of the lower flow channel.

[0009] 2. In the above scheme, the area of ​​the reaction air inlet is 2 to 5 times the area of ​​the hydrogen inlet.

[0010] 3. In the above scheme, the area of ​​the reaction air outlet is 2 to 5 times the area of ​​the hydrogen outlet.

[0011] 4. In the above scheme, the width of the first groove is equal to the width of the first ridge.

[0012] 5. In the above scheme, the width of the second groove is equal to the width of the second ridge.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] This utility model relates to a metal bipolar plate for fuel cells. An air cooling plate located between the anode and cathode plates has several upper flow channel grooves facing the anode plate and several lower flow channel grooves facing the cathode plate, arranged alternately along its length. The opening width of the upper flow channel groove is smaller than the width of its bottom, and the opening width of the lower flow channel groove is smaller than the width of its bottom. This increases the contact area between the air cooling plate and the anode and cathode plates, reduces the probability of damage to the grooves and ridges of the anode and cathode plates, and improves the overall pressure resistance and heat dissipation performance of the bipolar plate assembly. Attached Figure Description

[0015] Appendix Figure 1 This is a three-dimensional structural diagram of the metal bipolar plate of the fuel cell of this utility model;

[0016] Appendix Figure 2 This is a rear-view, bottom-view structural diagram of the metal bipolar plate of the fuel cell of this utility model;

[0017] Appendix Figure 3 This is a three-dimensional structural diagram of the air cooling plate of this utility model.

[0018] Appendix Figure 4 This is a front view structural diagram of the air cooling plate of this utility model.

[0019] Appendix Figure 5 For the appendix Figure 1 A magnified view of a portion of point A in the middle.

[0020] In the attached diagrams: 1. Anode plate; 2. Cathode plate; 3. Air cooling plate; 41. Hydrogen inlet; 42. Hydrogen outlet; 51. Reacting air inlet; 52. Reacting air outlet; 61. Cooling air inlet; 62. Cooling air outlet; 71. First groove; 72. First ridge; 81. Second groove; 82. Second ridge; 9. Upper flow channel groove; 10. Lower flow channel groove. Detailed Implementation

[0021] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0022] Example 1: A metal bipolar plate for a fuel cell, comprising an anode plate 1, a cathode plate 2, and an air cooling plate 3 located between the anode plate 1 and the cathode plate 2, characterized in that: each of the anode plate 1 and the cathode plate 2 has a hydrogen inlet 41 and a reaction air inlet 51 at one end, and a hydrogen outlet 42 and a reaction air outlet 52 at the other end; the air cooling plate 3 has a cooling air inlet 61 on one side and a cooling air outlet 62 on the other side.

[0023] The surface of the anode plate 1 opposite to the air cooling plate 3 is provided with a plurality of first grooves 71, and adjacent first grooves 71 are separated by first ridges 72. The surface of the cathode plate 2 opposite to the air cooling plate 3 is provided with a plurality of second grooves 81, and adjacent second grooves 81 are separated by second ridges 82.

[0024] The air cooling plate 3 is provided with a plurality of upper flow channel grooves 9 facing the anode plate 1 and a plurality of lower flow channel grooves 10 facing the cathode plate 2 alternately along its length. The opening width of the upper flow channel groove 9 is smaller than the width of the bottom of the upper flow channel groove 9, and the opening width of the lower flow channel groove 10 is smaller than the width of the bottom of the lower flow channel groove 10.

[0025] The width of the bottom of the upper flow channel 9 is 1.5 times the opening width of the upper flow channel 9, and the width of the bottom of the lower flow channel 10 is 1.5 times the opening width of the lower flow channel 10.

[0026] The area of ​​the air inlet 51 is three times the area of ​​the hydrogen inlet 41.

[0027] The area of ​​the air outlet 52 in the above reaction is three times the area of ​​the hydrogen outlet 42.

[0028] The width of the first groove 71 is equal to the width of the first ridge 72.

[0029] Example 2: A metal bipolar plate for a fuel cell, comprising an anode plate 1, a cathode plate 2, and an air cooling plate 3 located between the anode plate 1 and the cathode plate 2, characterized in that: each of the anode plate 1 and the cathode plate 2 has a hydrogen inlet 41 and a reaction air inlet 51 at one end, and a hydrogen outlet 42 and a reaction air outlet 52 at the other end; the air cooling plate 3 has a cooling air inlet 61 on one side and a cooling air outlet 62 on the other side.

[0030] The surface of the anode plate 1 opposite to the air cooling plate 3 is provided with a plurality of first grooves 71, and adjacent first grooves 71 are separated by first ridges 72. The surface of the cathode plate 2 opposite to the air cooling plate 3 is provided with a plurality of second grooves 81, and adjacent second grooves 81 are separated by second ridges 82.

[0031] The air cooling plate 3 is provided with a plurality of upper flow channel grooves 9 facing the anode plate 1 and a plurality of lower flow channel grooves 10 facing the cathode plate 2 alternately along its length. The opening width of the upper flow channel groove 9 is smaller than the width of the bottom of the upper flow channel groove 9, and the opening width of the lower flow channel groove 10 is smaller than the width of the bottom of the lower flow channel groove 10.

[0032] The width of the bottom of the upper flow channel 9 is 1.8 times the opening width of the upper flow channel 9, and the width of the bottom of the lower flow channel 10 is 1.8 times the opening width of the lower flow channel 10.

[0033] The area of ​​the air inlet 51 in the above reaction is four times the area of ​​the hydrogen inlet 41.

[0034] The area of ​​the air outlet 52 in the above reaction is four times the area of ​​the hydrogen outlet 42.

[0035] The width of the second groove 81 is equal to the width of the second ridge 82.

[0036] When the above-mentioned metal bipolar plate for fuel cell is used, the air cooling plate 7 located between the anode plate 5 and the cathode plate 6 is alternately provided with a number of upper flow channel grooves facing the anode plate 5 and a number of lower flow channel grooves facing the cathode plate 6 along its length. The opening width of the upper flow channel groove is smaller than the width of the bottom of the upper flow channel groove, and the opening width of the lower flow channel groove is smaller than the width of the bottom of the lower flow channel groove. This increases the contact area between the air cooling plate 7 and the anode plate 5 and the cathode plate 6, reduces the probability of damage to the grooves 51 and ridges of the anode plate 5 and the cathode plate 6, and improves the overall pressure resistance and heat dissipation performance of the bipolar plate assembly.

[0037] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A metal bipolar plate for a fuel cell, comprising an anode plate (1), a cathode plate (2), and an air cooling plate (3) located between the anode plate (1) and the cathode plate (2), characterized in that: The anode plate (1) and cathode plate (2) each have a hydrogen inlet (41) and a reaction air inlet (51) at one end, and a hydrogen outlet (42) and a reaction air outlet (52) at the other end. The air cooling plate (3) has a cooling air inlet (61) on one side and a cooling air outlet (62) on the other side. The anode plate (1) has a plurality of first grooves (71) on the surface opposite to the air cooling plate (3), and adjacent first grooves (71) are separated by first ridges (72). The cathode plate (2) has a plurality of second grooves (81) on the surface opposite to the air cooling plate (3), and adjacent second grooves (81) are separated by second ridges (82). The air cooling plate (3) is alternately provided with a number of upper flow channel grooves (9) facing the anode plate (1) and a number of lower flow channel grooves (10) facing the cathode plate (2) along the length direction. The opening width of the upper flow channel groove (9) is smaller than the width of the bottom of the upper flow channel groove (9), and the opening width of the lower flow channel groove (10) is smaller than the width of the bottom of the lower flow channel groove (10).

2. The fuel cell metal bipolar plate according to claim 1, characterized in that: The width of the bottom of the upper flow channel (9) is 1 to 2 times the opening width of the upper flow channel (9), and the width of the bottom of the lower flow channel (10) is 1 to 2 times the opening width of the lower flow channel (10).

3. The fuel cell metal bipolar plate according to claim 1 or 2, characterized in that: The area of ​​the reaction air inlet (51) is 2 to 5 times the area of ​​the hydrogen inlet (41).

4. The fuel cell metal bipolar plate according to claim 1 or 2, characterized in that: The area of ​​the reaction air outlet (52) is 2 to 5 times the area of ​​the hydrogen outlet (42).

5. The fuel cell metal bipolar plate according to claim 1 or 2, characterized in that: The width of the first groove (71) is equal to the width of the first ridge (72).

6. The fuel cell metal bipolar plate according to claim 1 or 2, characterized in that: The width of the second groove (81) is equal to the width of the second ridge (82).

Images