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Fuel cell bipolar plate for proton exchange membrane and rolling method

A proton exchange membrane, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of difficult large-scale application, complex process, high cost, and achieve the effect of less equipment, simple process, and elimination of repositioning errors

Inactive Publication Date: 2014-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] To sum up, the processing methods such as etching, chemical corrosion, and mechanical processing are time-consuming, costly, and the process is relatively complicated, so it is difficult to apply them on a large scale.

Method used

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  • Fuel cell bipolar plate for proton exchange membrane and rolling method
  • Fuel cell bipolar plate for proton exchange membrane and rolling method
  • Fuel cell bipolar plate for proton exchange membrane and rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A fuel cell bipolar plate rolling processing method for proton exchange membranes, which is made of a three-layer stainless steel foil strip through laser engraving and hot rolling; the steps are as follows: 1) Uncoiler feeding: three The uncoilers supply three layers of horizontal stainless steel foil strips, and the feeding speed of uncoiler 1 must be consistent; the thickness of the stainless steel foil strips supplied by each uncoiler 1 is determined according to the structural design requirements of the bipolar plate, and the thickness of the outer stainless steel foil strips The depth of the flow channel of the flow field finally formed on the bipolar plate is determined by the hot rolling process, and the total thickness of the three-layer stainless steel foil strip and the hot rolling process determine the thickness of the final bipolar plate;

[0034] 2) Preliminary positioning of the foil strip: the three-layer stainless steel foil strip is initially positioned...

Embodiment 2

[0043] Present embodiment is except following feature, and other is all identical with embodiment 1: as Image 6 As shown, the flow field of the fuel cell bipolar plate selected for the proton exchange membrane is an interdigitated flow field, which can force the reactant gas to pass through the diffusion layer of the electrode, strengthen the mass transfer capacity of the diffusion layer, and at the same time The water is drained in time.

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Abstract

The invention discloses a rolling method of a fuel cell bipolar plate for a proton exchange membrane, which can achieve continuous mass production and reduce the cost. The fuel cell bipolar plate is machined by carving three stainless steel foils with laser, thermally rolling, and machining the three stainless steel foils in a combined way. Through adoption of rollers, a roller pair and a shearing punching device, the rolling method is few in equipment, succinct in process flow and simple in technology; continuous operation of a machine is achieved, so that the rolling method is applicable to the mass production; and continuous manufacturing on a same production line is achieved, so that the bipolar plate repositioning error can be eliminated and the formability and the forming precision of the bipolar plate can be improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells used for proton exchange membranes, in particular to a fuel cell bipolar plate used for proton exchange membranes and a rolling processing method. Background technique [0002] A fuel cell is an energy device characterized by cleanliness, no pollution, low noise, and high energy conversion efficiency. The basic components of a fuel cell include electrodes, MEA components and bipolar plates. The bipolar plate has the function of collecting current, channeling reaction gas and separating reducing agent and oxidizing agent. The performance of bipolar plates depends on material properties, flow field design, and processing techniques. Research on bipolar plates is a very important subject in fuel cells, because bipolar plates account for about 70%-80% of the total mass of the entire proton exchange membrane fuel cell, and the cost accounts for about 40%-50% of the total cost. The current process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 万珍平唐洪亮李耀超汤勇
Owner SOUTH CHINA UNIV OF TECH
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