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Metal bipolar plate used for proton exchange film fuel cell and preparative method

A technology of metal bipolar plates and proton exchange membranes, which is applied to fuel cell parts, battery electrodes, circuits, etc., can solve the problems of complex manufacturing process and high processing costs, and achieve strong and reliable sealing, reliable bonding, and low cost. low effect

Active Publication Date: 2007-09-26
中钛国创(青岛)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method proposed in literature (8) has a relatively complicated manufacturing process and high processing costs

Method used

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  • Metal bipolar plate used for proton exchange film fuel cell and preparative method
  • Metal bipolar plate used for proton exchange film fuel cell and preparative method
  • Metal bipolar plate used for proton exchange film fuel cell and preparative method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of thin metal bipolar plates without wire seals:

[0046] Select the working area as 130cm 2 Five sheets of stainless steel fuel cell machined plates with a thickness of 0.4mm, around the working area and around the gas and liquid chambers, anyway, use 85% by weight phosphoric acid (analytical pure) as an adhesive on both sides, and spread evenly on the bipolar plates Around the working area and around the gas and liquid chambers, strips or wires made of tin-silver, tin-copper, tin-bismuth and other materials are evenly bonded around the bipolar plate as a sealing line, and the single machined plate is coated and sealed. See Figure 1 after the line, and after positioning the five boards, stack them up one by one, and take them to the vulcanizing machine for high-temperature and high-pressure treatment (temperature is 180°C, pressure is 0.08MPa). Before the preparation, the upper and lower end plates of the vulcanizing machine must be processed flat and smoo...

Embodiment 2

[0048] Preparation of thin metal bipolar plates with platinum wire seals:

[0049] Select the working area as 120cm 2 Five sheets of stainless steel fuel cell machined plates with a thickness of 0.4mm, around the working area and around the gas and liquid chambers, anyway, use 90% by weight phosphoric acid (analytical pure) as an adhesive on both sides, and evenly spread on the bipolar plates Around the working area and around the gas and liquid chambers, strips or wires made of tin-silver, tin-copper, tin-bismuth and other materials are evenly bonded around the bipolar plate as a sealing line, and a smooth platinum wire Spot welding on the sealing line, and then after positioning the five plates, stack them up one by one, and take them to the vulcanizing machine for high temperature and high pressure treatment (temperature is 190°C, pressure is 0.06MPa). Before the preparation, the upper and lower end plates of the vulcanizing machine must be processed flat and smooth to ens...

Embodiment 3

[0051] Preparation of thin metal bipolar plates with platinum wire seals:

[0052] Select the working area as 130cm 2 Five sheets of stainless steel fuel cell machined plates with a thickness of 0.3mm, around the working area and around the gas and liquid chambers, anyway, use 95% by weight phosphoric acid (analytical pure) as an adhesive on both sides, and evenly spread on the bipolar plates Around the working area and around the gas and liquid chambers, strips or wires made of tin-silver, tin-copper, tin-bismuth and other materials are evenly bonded around the bipolar plate as a sealing line, and a smooth platinum wire Spot welding on the sealing line, then after positioning the five plates, stack them up one by one, and take them to the vulcanizing machine for high temperature and high pressure treatment (temperature is 210°C, pressure is 0.09MPa). Before the preparation, the upper and lower end plates of the vulcanizing machine must be processed flat and smooth to ensure ...

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Abstract

This invention relates to a kind of metal double-polar plate and its producing method used in proton exchanging membrane fuel cell under special situation. The said double-polar plate is arranged with gas and liquid chamber. A layer of potted line is evenly cemented at working area circumference of double-polar plate and circumference of gas, liquid chamber. The producing method of the said double-polar plate is: adhesive phosphoric acid, which weight percent is no less than 85%, is evenly smeared on working area circumference of double-polar plate and circumference of gas, liquid chamber. Conductive adhesive is evenly cemented around the double-polar plate as potted line. The pressure and temperature are produced on vulcanizing machine. The pressure is controlled below 0.1MPa. The temperature of vulcanizing machine is controlled between 150DEG C-240DEG C. This invention resolves question of sealing between gas chamber and gas chamber, gas chamber and environment in battery.

Description

technical field [0001] The present invention relates to a metal bipolar plate for proton exchange membrane fuel cell used in special occasions and its manufacturing technology. This technology is useful for sealing the bipolar plate for proton exchange membrane fuel cell and promoting the industrialization process of fuel cell technology has great significance. Background technique [0002] Proton exchange membrane fuel cell technology has made considerable progress since the 1990s, and electrocatalysts and electrodes, proton exchange membranes and their three-in-one components have entered the stage of commercial production. Whether it is an alkaline fuel cell or a proton exchange membrane fuel cell, strict sealing measures are required to make the fuel cell run smoothly and effectively. A fuel cell is a battery pack composed of multiple single cells connected in series, and its sealing includes two items: one is the sealing of the gas chamber and the outside world. The s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/02H01M8/0202
CPCY02E60/50
Inventor 李相一李杰张华民明平文衣宝廉姜玉玉
Owner 中钛国创(青岛)科技有限公司
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