Method for supplying fuel gas to a gas chamber of a fuel cell and fuel cell

摘要

Mechanical stresses of the membrane of a fuel cell can be reduced by virtue of the fact that the supply of feed gas to a gas chamber of the fuel cell takes places, initially, by means of a first pressure increasing speed and then by means of a second pressure increasing speed. The first pressure increasing speed is slower than the second pressure increasing speed. Pressure surges are prevented in the membrane due to the lower pressure increasing speed in the first phase of the gas supply, and as a result, the life span of the membrane is increased.

主权项

1. A method for supplying operating gas to an anode gas chamber and a cathode gas chamber of a fuel cell, wherein the fuel cell further comprises a cell membrane between the anode gas chamber and the cathode gas chamber, wherein the operating gas includes a first operating gas supplied to the cathode chamber and a second operating gas supplied to an anode chamber, the method comprising:
initially supplying the first operating gas to the cathode gas chamber at a first pressure increase velocity, when the pressure in the cathode gas chamber is below a predetermined value; and subsequently supplying the first operating gas to the cathode gas chamber at a second pressure increase velocity when the pressure in the cathode gas chamber exceeds said predetermined value, wherein first pressure increase velocity is less than the second pressure increase velocity, such that mechanical stresses on the cell membrane are reduced.