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Flow field demarcation strip for proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, which is applied to fuel cell components, solid electrolyte fuel cells, fuel cells, etc., can solve problems such as large contact resistance, achieve reduced thickness, be suitable for mass production, and have a simple preparation process Effect

Inactive Publication Date: 2006-03-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current needs to cross the conduction between the metal wire and the metal wire in the direction perpendicular to the metal mesh, and their contact area is small, so the contact resistance is large

Method used

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  • Flow field demarcation strip for proton exchange membrane fuel cell
  • Flow field demarcation strip for proton exchange membrane fuel cell
  • Flow field demarcation strip for proton exchange membrane fuel cell

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Embodiment Construction

[0031] The present invention further describes the production process of the present invention, its use method and the obtained effects through the following specific description.

[0032] Please combine figure 1 A and figure 1 B, is the manufacturing process of the wave-shaped flow field distribution plate 10 of the present invention. The metal plate used in the present invention can be materials with good conductivity such as stainless steel, titanium or titanium alloy, silver, niobium, etc., and what the present embodiment adopts is thin Stainless steel plate: A circular hole with a diameter of 0.4 mm is punched on the thin stainless steel plate 11 by stamping, and then a protrusion 12 is formed by stamping, and there is a circular hole 13 on the surface of each protrusion. The shape of the protrusions is a square with a circular arc transition, and the direction of each protrusion is inconsistent with the direction of the surrounding protrusions, and the positions are sta...

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Abstract

The flow field distributing board for proton exchange fuel cell is produced with metal sheet and through punching. The metal sheet may be of stainless steel, titanium, silver, niobium, their alloy or other excellent conductor; and on the surface of the metal sheet one layer of gold or other coating may be plated. The metal sheet is first perforated through punching, laser processing, high-energy ray treatment or other method to form circular, triangular or polygonal holes; and then punched to form platforms flat lugs around hole. The lugs has direction perpendicular to that of the adjacent ones, cross positions and squared, S-shaped, trapezoid, polygonal or combined shape.

Description

technical field [0001] The invention relates to the preparation technology of a fuel cell flow field distribution plate. The prepared flow field distribution plate is suitable for a hydrogen / oxygen (air) proton exchange membrane fuel cell, especially a fuel cell directly fed with methanol, ethanol or other organic fuels. Background technique [0002] A fuel cell is an electrochemical reaction device that directly converts the chemical energy of fuel into electrical energy. There is no pollution, no noise, high power generation efficiency and long service life during power generation, so it has broad application prospects in aerospace, transportation, mobile power and other fields. [0003] A fuel cell consists of an anode, an electrolyte membrane, and a cathode. The fuel is oxidized at the anode, the oxidant is reduced at the cathode, and the electrons generated by the electrochemical reaction move directionally in the external circuit to generate electricity. The voltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10H01M8/0263
CPCY02E60/521Y02E60/50
Inventor 孙公权刘建国陈利康辛勤衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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