Unlock instant, AI-driven research and patent intelligence for your innovation.

Double electrode plate of proton exchange film fuel cell

A proton exchange membrane and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of battery cost increase, gas consumption, high processing costs, etc., to promote full utilization, reduce exhaust emissions, and reduce manufacturing costs Effect

Inactive Publication Date: 2003-09-10
上海新源动力有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a common problem in the above literatures that has not been resolved: that is, the gas inlet and outlet of the gas channel are the same, so that the reactant gas is distributed unevenly on the electrode surface, and the catalytic layer cannot be fully utilized. It gradually consumes according to its length, and the air velocity is different at different places, especially at the exhaust gas, where the gas has been obviously consumed, but the channel remains the same, which makes the gas mass transfer in a disadvantageous state, and the processing cost is high, resulting in an increase in the cost of the battery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double electrode plate of proton exchange film fuel cell
  • Double electrode plate of proton exchange film fuel cell
  • Double electrode plate of proton exchange film fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Using three layers by 316 # Bipolar plates made of stainless steel (such as figure 1 ), the working area is 135cm 2 , the width-to-length ratio of the working area is the golden section ratio of 0.618, the middle layer is a conductive current separator plate 1 of a bipolar plate with a thickness of 0.3 mm, and the air and hydrogen flow field plates 2 and 3 are respectively 0.5 mm on both sides. The gas flow field plate 1 is processed by the cutting method and then combined with the partition plate to form a bipolar plate. Air flow field plate side as figure 2 As shown, 4 is the air inlet, 5 is the air outlet, 6 is the hydrogen inlet, and 7 is the hydrogen outlet. The width of the strip groove is 1mm, and the stem is 0.4mm. 8 air channels enter in parallel at 1 / 2, 4 channels are connected in series at 1 / 2, 2 channels are connected in series at 3 / 4, until 5 air outlets. image 3 It is the side structure of the hydrogen flow field plate, in which 4 is the air inlet...

Embodiment 2

[0027] 1. The bipolar plate is prepared by three layers of thin 1Cr18Ni9Ti stainless steel plate (see figure 1 ), the working area is 135cm 2 , the width-to-length ratio is 0.618 according to the golden ratio, and the three layers are welded together by brazing. The middle layer is a conductive current separation plate 1, 0.5mm thick, and the oxygen and hydrogen flow field plates 2 and 3 on both sides are also 0.5mm thick. The strip channel is machined by EDM. The groove width is 1.0mm and the stem is 0.35mm. Hydrogen flow field plate structure and figure 2 same (see Figure 5 ), oxygen inlet 4, oxygen outlet 5, hydrogen inlet 6, hydrogen outlet 7. The difference is that the hydrogen inlet 6 is 8 channels connected in parallel, 4 channels are connected in series at 1 / 2, and 2 channels are connected in series at 3 / 4 to the outlet, and are discharged from the hydrogen outlet hole 7. The oxygen flow field plate is shown in Figure 4 , of which 4 is the oxygen inlet, 5 is t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

It is made of three layers of thin metal plate, the isolating plate conducting electric current and of anti-permeation of gas and liquid is of mediated layer, the guiding flow plates with channel are of two outer layers. The characteristic is that channels in the plate are continuous from gas entrance to the exit, and the upper sections of channel are merged into lower section of channel to make the area of section of channel reduced step-by-step from the entrance to the exit, the total area of channel is 1 / 2-4 / 5 of whole working area. With the invention we can enhance the utilization ratio of reacting gas, accelerate mass transfer of pole surface thus increasing battery function. It is easy to be machined and has lower fabricating cost.

Description

technical field [0001] The invention relates to fuel cell technology, and in particular provides a bipolar plate structure of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is a power generating device that directly converts chemical energy stored in fuel and oxidant into electrical energy. Its power generation method is the same as that of conventional chemical power sources. The electrode provides a place for electric transfer, the anode catalyzes the oxidation process of the fuel (such as hydrogen, etc.), the cathode catalyzes the reduction process of the oxidant (such as oxygen, etc.), and the conductive ion between the cathode and the anode. The electrolyte migrates within, and the electrons do work through the external circuit and constitute the total electrical circuit. In a cell, the conversion of chemical energy to electrical energy takes place isothermally, ie in a fuel cell, the free energy of the reaction is available at its oper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/94
CPCY02E60/50
Inventor 衣宝廉张恩浚韩明曲天锡王德和
Owner 上海新源动力有限公司