Method for performing heat treatment on membrane electrode assembly

Patent metadata

Field	Value
Publication number	US-2023040167-A1
Application number	US-202217881087-A
Country	US
Kind code	A1
Filing date	Aug 4, 2022
Priority date	Aug 6, 2021
Publication date	Feb 9, 2023
Grant date	—

Abstract

Disclosed are a method of heat treating a membrane electrode assembly, in which a first membrane electrode assembly or the like is positioned between a first member and a second member and heat treatment is performed as at least one of the first member and the second member being a heating member, and also in which variation in the temperature of the membrane electrode assembly at different roll positions is decreased and interfacial bonding between the layers in the membrane electrode assembly is enhanced. Thus, the quality of the membrane electrode assembly, such as the durability and performance thereof, may be improved, the yield thereof may be increased, and the amount of heat treatment may be efficiently increased, thereby reducing costs through mass heat treatment and decreasing the rate of processing of the membrane electrode assembly.

First claim

What is claimed is:

1 . A method of heat treating a membrane electrode assembly, comprising:
preparing a roll-shaped first member having an empty space therein; winding a first membrane electrode assembly on the first member; locating a second member on an outermost portion of the wound first membrane electrode assembly; winding a second membrane electrode assembly on an outermost portion of the second member to obtain a roll product; and heat-treating the roll product, wherein at least one of the first member and the second member comprises a heating member.

2 . The method of claim 1 , wherein the first member comprises a heating element located in the empty space therein.

3 . The method of claim 1 , wherein the second member comprises a heating film.

4 . The method of claim 3 , wherein the heating film is connected to a controller capable of controlling an amount of current.

5 . The method of claim 4 , wherein the controller is connected to the heating film to control the amount of current.

6 . The method of claim 1 , wherein at least one of the first member and the second member comprises a heat pipe.

7 . The method of claim 6 , wherein a pair of heat pipes is located at the outermost portion of the wound first membrane electrode assembly.

8 . The method of claim 6 , wherein the heat pipe further comprises a protrusion protruding from a side of the roll product.

9 . The method of claim 1 , wherein the roll product is heat-treated in an oven.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Kim Sun Il
• Yu Seung Ah
• Kim Yu Seok
• Lee Han Hyung

Classifications

• H01M8/1004 Primary

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M4/8882 Primary

  Heat treatment, e.g. drying, baking · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H05B1/023

  Industrial applications · CPC title

• H01M4/8896

  Pressing, rolling, calendering (membrane electrode assemblies H01M8/1004) · CPC title