Method for recognition of a leak in a fuel cell

Details Method for recognition of a leak in a fuel cell Method for recognition of a leak in a fuel cell

2007-10-16

2007-10-16

Alejandro, Raymond (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000, C429S010000, C073S040000, C374S004000

Reexamination Certificate

active

10433900

ABSTRACT:
A leak in the membrane of a fuel cell leads to an uncontrolled and heat-generating reaction which can destroy the fuel cell. A method for recognition of a leak in a fuel cell is disclosed which leads to an automatic closing down of the fuel cell without a safety device. The anode gas chamber of the fuel cell is treated with a first test gas and the cathode gas chamber of the fuel cell is treated with a second test gas. The cell voltage of the fuel cell measured and the change with time in the cell voltage is monitored. A gas with a hydrogen content of 0.1 to 20 vol. % is used as first test gas and a gas with an oxygen content of 0.1 to 30 vol. % is used as second test gas.

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Japanese Office Action dated Jan. 11, 2007 (with translation) for corresponding Japanese Patent Application No. 2002-548805.

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