Fuel cell apparatus
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United States of America Patent
Stats
-
Nov 6, 2001
Grant Date -
N/A
app pub date -
Sep 10, 1999
filing date -
Sep 16, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a fuel cell apparatus in which a discharge gas having a pressure energy even after an oxygen has been consumed at the fuel cell is expanded at an expander to collect the pressure energy in the discharge gas as a mechanical energy for assisting driving of a compressor. A clutch (20) is disposed between the electric motor (16) and the expander (15) for connecting/interrupting the expander with/from the electric motor, and a control means (21, 22) for controlling the clutch is provided. The control means detects a pressure in the gas discharge tube (13) between the fuel cell (10) and the expander (15), to interrupt the clutch as long as a detected pressure is lower than a predetermined value, and to connect the clutch when the detected pressure becomes higher than the predetermined value.
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