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Method for manufacturing metal separator for fuel cell

A technology of metal separators and fuel cells, which is applied to fuel cell parts, fuel cells, battery pack parts, etc., and can solve problems such as pollution of MEA, coolant leakage, fire, etc.

Inactive Publication Date: 2008-06-11
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If airtightness is not maintained, coolant may leak and contaminate the MEA, rendering the contaminated battery useless
In addition, if hydrogen gas leaks, it may cause a fire

Method used

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  • Method for manufacturing metal separator for fuel cell

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Experimental program
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Embodiment Construction

[0013] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Preferred embodiments are provided to enable those skilled in the art to fully understand the present invention, but various modifications can be made, and the protection scope of the present invention is not limited to these preferred embodiments.

[0014] The method of molding a metal partition according to an embodiment of the present invention includes: cutting two plates; bending the resulting plates into concave and convex portions using a press (molding); placing the first plate 10 on the second plate 11 so that the concave portion of each plate faces the convex portion of the other plate.

[0015] More specifically, each plate 10, 11 comprises concave and convex portions in the shape of a zigzag, such as the trapezoidal zigzag shown. The second plate 11 is inverted 180 degrees to fit the first plate 10 . Next, the two plates 10 and 11 a...

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Abstract

A method of manufacturing a metal separator for a fuel cell includes molding first and second plates such that each plate has at least one concave portion and at least one convex portion; applying a sealant to at least one of the plates; placing the plates such that the concave portions of each plate are opposite the convex portions of the other plate, and the ends of the second plate protrude beyond the ends of the first plate; and seaming the ends of the first plate to the ends of the second plate. The seaming may include bending the ends of the plates at right angles with a conical roller, bending the ends of the second plate to surround the ends of the first plate with the conical roller, and bending the ends of the plates at right angles with a cylindrical roller.

Description

technical field [0001] The invention relates to a method for manufacturing a fuel cell metal separator. Background technique [0002] Small fuel cell stacks can be a suitable alternative power source instead of batteries in portable electronic devices such as cell phones, walkie-talkies and laptop computers. In addition to being non-polluting, fuel cell stacks are more convenient because they don't require recharging. [0003] To make a fuel cell stack, a membrane electrode assembly (MEA) is layered with a separator interposed therebetween. The separator uniformly supplies hydrogen and oxygen to the MEA and is electrically connected in series with the MEA. [0004] Separators are usually made of graphite. However, processing graphite is expensive and takes a long time. [0005] In recent years, metal partitions have been used. The metal separator includes flow paths for supplying hydrogen, oxygen, and coolant, and supports the MEA. If airtightness is not maintained, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M8/02
CPCH01M8/0254H01M8/0267H01M8/0247Y02E60/50H01M8/0206B21D39/02Y10T29/4911H01M8/0297Y02P70/50H01M8/0258H01M8/02H01M8/026H01M8/0263H01M8/0271
Inventor 郑大铉
Owner HYUNDAI MOTOR CO LTD