Patent ID: 8528883
Filing Date: 2013-09-10
Classification: B01D,H01M,Y02E,Y02P,Y10T

Abstract:
1. A humidifier for a fuel cell, comprising: a housing provided with a first inlet, through which a reaction gas to be supplied to a fuel cell enters, and a second inlet, through which a moisture-containing unreacted gas emitted from the fuel cell enters; and a hollow fiber membrane comprising a first hydrophilic polymer film and a second hydrophilic polymer film, the hollow fiber membrane providing a flow passage for the reaction gas entering through the first inlet, wherein only moisture of the moisture-containing unreacted gas permeates into the flow passage through the hollow fiber membrane such that the reaction gas is humidified, wherein the first hydrophilic polymer film is on an outer surface of the second hydrophilic polymer film, wherein the second hydrophilic polymer film is made of a perfluorinated sulfonic acid copolymer, and wherein the first hydrophilic polymer film has higher moisture and heat resistance but lower hydrophilicity than the second hydrophilic polymer film.