Patent ID: 7867659
Filing Date: 2011-01-11
Classification: B01D,H01M,Y02E,Y02T

Abstract:
1. A humidification system for a fuel cell, the humidification system comprising: a first membrane humidifier including at least one hollow fiber membrane in a first housing; a second membrane humidifier including at least one hollow fiber membrane in a second housing, the diameter of the hollow fiber membrane being larger and the pore size of the hollow fiber membrane being smaller than those of the hollow fiber membrane of the first membrane humidifier; and a flow path switching valve provided at a rear end of the second membrane humidifier for selectively opening or closing a discharge flow path of humidified air to be supplied to a fuel cell stack of the fuel cell, wherein the first and second membrane humidifiers are arranged in parallel with respect to the direction of flow paths through which dry air supplied from outside air is fed into the first and second membrane humidifiers and flow paths through which the humidified air is supplied to the fuel cell stack; and the dry air passes through all or part of the hollow fiber membranes and supersaturated humid air discharged from the fuel cell stack of the fuel cell passes inside the first and second housings such that the humidified air can be made by moisture exchange between the dry air and the supersaturated humid air.