Metal bipolar plate for proton exchange membrane fuel cell

A metal bipolar plate, proton exchange membrane technology, applied in fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of complex design and cumbersome structure, and achieve simple processing, low processing cost, and light weight. Effect

Active Publication Date: 2009-04-29
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing bipolar plate is that the flow fields of the three mutually sealed chambers of the bipolar plate are all made separately, the structure is cumbersome, and the design is relatively complicated

Method used

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  • Metal bipolar plate for proton exchange membrane fuel cell
  • Metal bipolar plate for proton exchange membrane fuel cell
  • Metal bipolar plate for proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1: Process steps:

[0028] According to the polar plate structure design molding die of the present invention;

[0029] The surface of the stainless steel sheet with a thickness of 0.10mm is coated with volatile stamping and stretching oil, the plate is put into the mold, and molded on a four-column hydraulic press to obtain the designed flow field grooves of each cavity and the sealant groove plate, stamping grooves The depth is 0.5mm, the plate size is 410 x 100mm, and the flow field size is 340 x 85mm.

[0030] After the stainless steel is punched, the surface is treated with a corrosion-resistant conductive coating. This plan uses electroplating precious metal silver, and the total thickness of the coating is 0.02mm.

[0031] Lay small pieces of glass cloth laminated boards on the glue line slots of the cooling cavity of the cathode and anode plates respectively, the distance between the small pieces is 5mm, and the front and rear small pieces are aligned t...

example 2

[0036] Changing the thickness of the stainless steel plate in Example 1 to 1.5mm, the same process steps can obtain a bipolar plate with the same flow field design, and the thickness of the bipolar plate is 1.5mm.

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Abstract

The invention relates to a proton exchange membrane cell metal bipolar plate which is composed of a cathode chamber monopole plate and an anode chamber monopole plate which are made of metal sheets; the front surface of each of the monopole plates is respectively provided with a cathode chamber and an anode chamber, and cooling water chambers are arranged at the back surfaces of the cathode chamber monopole plate and the anode chamber monopole plate; flow passages composed of concavo convex grooves are arranged at the front and back surfaces of the monopole plates, the concavo convex grooves arranged on the front and back surfaces are corresponding to each other, the bumps on the front surfaces are the concave grooves on the back surfaces, and the concave grooves on the front surfaces are the bumps on the back surfaces; the concavo convex grooves on the front surfaces respectively form the flow passages of the cathode and anode chambers, and the concavo convex grooves on the back surfaces respectively form the flow passages of the cooling water chambers. The proton exchange membrane cell metal bipolar plate has the advantages that the manufactured bipolar plate is thin, the flow bodies are strictly separated, the flow body distribution is good, the weight is light, the processing is simple and the processing cost is low.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell, in particular to a proton exchange membrane fuel cell bipolar plate. Background technique [0002] The voltage of a single cell of a proton exchange membrane fuel cell is generally 0.3-1.0V. In practical applications, dozens to hundreds of single cells are used in series with bipolar plates. The bipolar plates supply the fuel and oxidant of the single cells and separate them. Fuel and oxidant, the high-power proton exchange membrane fuel cell bipolar plate also has a cooling device, and the coolant must be separated from the fuel and oxidant. Therefore, the bipolar plate is required to have electrical conductivity, corrosion resistance and sealing. The bipolar plate structure of high-power proton exchange membrane fuel cells is generally divided into three chambers, namely two air chambers and a cooling chamber, each chamber has a special flow field, and each chamber must be separated and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M8/0267
CPCY02E60/50Y02P70/50
Inventor 傅云峰戚朋侯中军徐洪峰明平文
Owner SUNRISE POWER CO LTD
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