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Gradient corrugated flow field structure

A corrugated, flow field technology, applied in the field of fuel cells, can solve problems such as cost bottlenecks, restrictions on large-scale applications, and high processing precision requirements, and achieve the effect of avoiding dead zones and liquid water accumulation

Active Publication Date: 2021-06-18
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

However, Toyota's 3D fine mesh flow field has high requirements for raw materials and machining accuracy, and as a result, its cost has become a bottleneck, limiting its large-scale application

Method used

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  • Gradient corrugated flow field structure
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  • Gradient corrugated flow field structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A gradient corrugated flow field structure, the flow field structure includes a plurality of inlet manifolds 1, a plurality of outlet manifolds 2, and a central area between the inlet manifolds 1 and the outlet manifolds 2;

[0028] The central area is composed of multiple primary flow channels and multiple secondary flow channels alternately, and the primary flow channels and secondary flow channels are arranged in parallel;

[0029] The first-stage flow channel is formed alternately by a plurality of identical concave arc surfaces 6 and a plurality of identical convex arc surfaces 5, the radius of the concave arc surfaces 6 is 2mm, and the radius of the convex arc surfaces 5 is It is equal to the radius of the concave arc surface 6, and the height of the convex arc surface 5 is equal to the height of the concave arc surface 6;

[0030] The secondary flow channel is composed of a plurality of identical convex arc-like surfaces 4 with flat tops and a plurality of identi...

Embodiment 2

[0037] A gradient corrugated flow field structure, the flow field structure includes a plurality of inlet manifolds 1, a plurality of outlet manifolds 2, and a central area between the inlet manifolds 1 and the outlet manifolds 2;

[0038] The central area is composed of multiple primary flow channels and multiple secondary flow channels alternately, and the primary flow channels and secondary flow channels are arranged in parallel;

[0039] The first-stage flow channel is formed alternately by a plurality of identical concave arc surfaces 6 and a plurality of identical convex arc surfaces 5, the radius of the concave arc surfaces 6 is 2mm, and the radius of the convex arc surfaces 5 is It is equal to the radius of the concave arc surface 6, and the height of the convex arc surface 5 is equal to the height of the concave arc surface 6;

[0040] The secondary flow channel is composed of a plurality of identical convex arc-like surfaces 4 with flat tops and a plurality of identi...

Embodiment 3

[0047] A gradient corrugated flow field structure, the flow field structure includes a plurality of inlet manifolds 1, a plurality of outlet manifolds 2, and a central area between the inlet manifolds 1 and the outlet manifolds 2;

[0048] The central area is composed of multiple primary flow channels and multiple secondary flow channels alternately, and the primary flow channels and secondary flow channels are arranged in parallel;

[0049] The first-stage flow channel is formed alternately by a plurality of identical concave arc surfaces 6 and a plurality of identical convex arc surfaces 5, the radius of the concave arc surfaces 6 is 2mm, and the radius of the convex arc surfaces 5 is It is equal to the radius of the concave arc surface 6, and the height of the convex arc surface 5 is equal to the height of the concave arc surface 6;

[0050] The secondary flow channel is composed of a plurality of identical convex arc-like surfaces 4 with flat tops and a plurality of identi...

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Abstract

The invention relates to a gradient corrugated flow field structure, and belongs to the field of fuel cells. The central area of the flow field structure is composed of a plurality of first-stage flow channels and a plurality of second-stage flow channels in an alternating mode. The first-stage flow channel is composed of a plurality of same concave arc surfaces and a plurality of same convex arc surfaces which are alternately arranged; the second-stage flow channel is formed by alternating a plurality of same convex-like arc surfaces of which the tops are planes and a plurality of same planes, and the height of the second-stage flow channel is linearly changed. The height of the secondary flow channel is linearly changed, so that the gas circulation sectional area is changed, the turbulence degree of gas is further changed, and finally the mass transfer capacity of the flow channel is changed.

Description

technical field [0001] The invention relates to a gradient corrugated flow field structure, which belongs to the field of fuel cells. Background technique [0002] A fuel cell is a device that converts chemical energy stored in hydrogen and oxygen into electrical energy, while simultaneously generating water and heat. Due to its absolute environmental friendliness, high efficiency, and mild working conditions, it is considered to be the most promising energy conversion device for large-scale applications. However, the current commercialization of fuel cells still faces the problem of high cost due to the use of noble metal Pt as the electrocatalyst. One of the ways to solve this problem is to increase the working current density of the battery and reduce the volume of the stack required to achieve the specified output, thereby reducing the cost. However, under high current density, fuel cells usually face problems such as insufficient reactant gas and product water cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258H01M8/0265
CPCH01M8/0258H01M8/0265Y02E60/50
Inventor 邵志刚何良侯明任红艾军
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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