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A fuel cell metal bipolar plate flow field flow channel structure

A metal bipolar plate and fuel cell technology, which is applied in the direction of fuel cells, fuel cell components, circuits, etc., can solve the problems of increased performance requirements for booster equipment, higher requirements for equipment selection, and increased difficulty in processing and manufacturing. Achieve the effect of less difficulty in processing, improve performance, and promote miniaturization

Active Publication Date: 2022-02-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it strengthens the mixing and transfer of substances inside the fuel cell, due to the large number of continuous protrusions in the flow channel, it increases the difficulty of processing and manufacturing, and causes relatively greater fluid resistance.
Especially on the air side, the pressure drop caused by it will be more significant, which will lead to a significant increase in the performance requirements of the air compressor and other booster equipment, resulting in greater energy loss, higher requirements for equipment selection, and increased costs at the same time

Method used

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  • A fuel cell metal bipolar plate flow field flow channel structure
  • A fuel cell metal bipolar plate flow field flow channel structure
  • A fuel cell metal bipolar plate flow field flow channel structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: a kind of fuel cell metal bipolar plate ( figure 1 ), the bipolar plate includes a fuel gas inlet 9, a fuel gas outlet 1, an oxidant inlet 3, an oxidant outlet 11, a coolant inlet 2, a coolant outlet 10, an oxidant flow field and a fuel flow field, and the oxidant flow field and The fuel gas flow field is respectively located on the left and right sides of the bipolar plate, the oxidant inlet 3 and the oxidant outlet 11 are connected through the flow channel in the oxidant flow field, and the fuel gas inlet 9 and the fuel gas outlet 1 are connected through the flow channel in the fuel gas flow field. The flow channels are connected;

[0051] The oxidant inlet 3 and the oxidant outlet 11 are centrosymmetric with the center of the bipolar plate as the center point; the fuel gas inlet 9 and fuel gas outlet 1 are centrosymmetric with the center of the bipolar plate as the center point; the The coolant inlet 2 and the coolant outlet 10 are centrally symmetric...

Embodiment 2

[0056] Embodiment 2: Based on the bipolar plate described in Embodiment 1, only the structural size of the raised portion is adjusted, and the specific adjustment is as follows: the length of the raised portion is adjusted to 35 mm, and the distance between the raised portion in each flow channel is 40 mm. Layout, the rest of the size and structure remain unchanged.

Embodiment 3

[0057] Embodiment 3: Based on the bipolar plate described in Embodiment 1, only the structural size of the raised portion is adjusted, and the specific adjustments are as follows: the length of the raised portion is adjusted to 2 mm, the height of the raised portion is 0.4 mm, and the raised portion is at The inner spacing of each flow channel is 8 mm, which is evenly arranged, and the other dimensions and structures remain unchanged.

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Abstract

The invention provides a fuel cell metal bipolar plate, the bipolar plate includes a fuel gas inlet, a fuel gas outlet, an oxidant inlet, an oxidant outlet, an oxidant flow field and a fuel flow field, the oxidant flow field and the fuel flow field Located on the left and right sides of the bipolar plate respectively, the oxidant flow field and the fuel flow field both include M flow channels, where M is an integer, and M≥1; N discrete protrusions are set in each flow channel, so The raised portion is formed by a bipolar plate raised at the bottom of the flow channel, N is an integer, and N≥1; the oxidant inlet and the oxidant outlet are connected through the flow channel in the oxidant flow field; the fuel gas inlet and the fuel gas The gas outlets communicate with each other through flow channels in the fuel gas flow field. The mass transfer capacity of the fuel cell is improved through the plurality of protrusions arranged in the flow field channel, thereby improving the performance of the fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a bipolar plate flow field channel structure for improving the performance of fuel cells and its application in fuel cells. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) (hereinafter referred to as fuel cell) relies on electrochemical reactions to directly convert chemical energy stored in fuel gas (such as hydrogen) into electrical energy. The fuel cell power generation process has the characteristics of fast start-up at room temperature, high energy conversion efficiency, green and pollution-free exhaust gas, and safety. It can be widely used in fixed power stations, mobile power stations, aviation (sky) power generation, underwater equipment power generation, marine generators, and vehicle-mounted power generation. machine, field emergency power supply, portable power supply and other fields. In the world, with the increasing awareness of environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/026H01M8/0263
CPCH01M8/026H01M8/0263Y02E60/50
Inventor 艾军侯明郑利民邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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