Fuel cell freeze start method with anode pressure control
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United States of America Patent
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Jun 20, 2023
Grant Date -
Dec 10, 2020
app pub date -
Nov 29, 2018
filing date -
Dec 18, 2017
priority date (Note) -
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Abstract
A method for starting a fuel cell in a fuel cell system, at temperatures below the freezing point of water, includes, in a first step, that the hydrogen concentration in the anode is increased; after which, in a second step, an anode pressure is increased for a fixed period of time, and while air is supplied to the cathode, the maximum possible current is drawn from the fuel cell, and after which, in a third step, the fuel cell is switched in a load-free manner and the anode pressure is reduced. After the third step, the second step and the third step are repeated successively until a sufficient performance of the fuel cell for its normal operation is reached.
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