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Punch formed metal bipolar plate of proton exchange membrane fuel cell

A technology of metal bipolar plates and proton exchange membranes, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of complex assembly of bipolar plates, and achieve the effects of slowing down deformation, uniform cooling water distribution, and uniform gas distribution

Inactive Publication Date: 2011-01-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gasket and the metal plate are separated, not stamped and formed at one time, which makes the production of the bipolar plate and the assembly of the stack complicated.

Method used

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  • Punch formed metal bipolar plate of proton exchange membrane fuel cell
  • Punch formed metal bipolar plate of proton exchange membrane fuel cell
  • Punch formed metal bipolar plate of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as Figure 1-5 The stamped proton exchange membrane fuel cell metal bipolar plate is composed of the second metal plate A and the first metal plate B stamped and formed by metal sheet through laser welding.

[0044] Such as figure 1 As shown in the exploded view, the left and right ends of the second metal plate A and the first metal plate B are provided with air outlet 1, air inlet 3, cooling water inlet 7, cooling water outlet 10, hydrogen inlet 6, hydrogen outlet 9, cooling A cooling water chamber is provided at the water inlet and outlet; flow field flow channels 5 composed of concave-convex grooves are arranged in the middle area of ​​the front and back flow fields of the two plates, wherein the positive concave-convex grooves of the first metal plate B form the anode flow field, The concave-convex grooves on the front of the second metal plate A form a cathode flow field, and the opposite sides of the two plates cooperate with each other to form a cooling wa...

Embodiment 2

[0053] The metal bipolar plate of the proton exchange membrane fuel cell formed by stamping is formed by the cooperation of two second metal plates A with the same structure stamped and formed by metal sheet; figure 1 similarly, just change the figure 1 It is sufficient to replace the first metal plate B with the second metal plate A, and the others are reserved, so no additional drawings are given.

[0054] Such as Figure 3-5 As shown, the left and right ends of the second metal plate A are provided with an air outlet 1, an air inlet 3, a cooling water inlet 7, a cooling water outlet 10, a hydrogen inlet 6, and a hydrogen outlet 9, and a cooling water outlet is provided at the cooling water inlet and outlet. Water cavity; the middle area of ​​the front and back flow fields of the two plates is provided with a flow field channel 5 composed of concave-convex grooves, wherein, the positive concave-convex grooves of one second metal plate A form the anode flow field, and the ot...

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Abstract

The invention relates to a punch formed metal bipolar plate of a proton exchange membrane fuel cell. The punch formed metal bipolar plate comprises a first metal plate and a second metal plate, wherein back sides of the two plates are welded by using laser; the front side of the first metal plate is provided with a sealed platform; the two plates are provided with intermittent corner guiding gutters between a flow field flow passage and each gas entrance; and the surrounding areas of cooling water entrances of the two plates are provided with strip-shaped grooves. The sealed platform can be made into a single battery with MEA through hot pressing, so sealing rings can be reduced, deformations are obviously improved, the sealing effect is good, and the assembly efficiency is greatly improved; the intermittent corner guiding gutters can distribute reaction gases for a plurality of times to ensure that the gases in an active region are distributed more uniformly and the phenomenon of 'flooding' is effectively eased up; the strip-shaped grooves not only can make the distribution of cooling water more uniform and guide the cooling water, but also strengthens the rigidity of the metal plates together with the sealed platform and can effectively slow down the deformation of each plate. The bipolar plate can be formed by two second metal plates, and is particularly suitable for assembling and testing and 'short stacks' and reducing the die sinking cost.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a metal bipolar plate composed of two unipolar plates used to form a proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a power generation device that directly utilizes hydrogen energy. PEMFC directly converts the chemical energy stored in hydrogen fuel and oxidant into electrical energy, and the energy conversion efficiency is high; the fuel cell is environmentally friendly, and the only emission is water. Therefore, fuel cell technology is considered to be the preferred clean and efficient power generation technology in the 21st century. [0003] A single fuel cell is mainly composed of a membrane electrode assembly, a bipolar plate and other auxiliary components. In order to improve the output power of the fuel cell, several single cells are usually stacked together in a straight or flat way, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86
CPCY02E60/50
Inventor 詹志刚吕志勇王谌裴后昌兰箭罗志平潘牧
Owner WUHAN UNIV OF TECH
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