Electric system for fuel cell, fuel cell vehicle, and method of supplying electric power
First Claim
1. A fuel cell vehicle for being propelled by a propulsive motor, said fuel cell vehicle having an electric system in which a fuel cell and an electric storage device are connected in parallel to each other with respect to the propulsive motor and connected to the propulsive motor through a power converter, comprising:
- a DC-to-DC converter connected closer to the electric storage device than a junction where the fuel cell and the electric storage device are connected in parallel to each other;
reactive gas supply means for supplying a reactive gas to said fuel cell;
failure detecting means for detecting a failure of said DC-to-DC converter;
response limiting means for limiting the response of electric power output from said fuel cell when said failure detecting means detects a failure of said DC-to-DC converter; and
regenerative electric power limiting means for limiting regenerative electric power of said propulsive motor to a value equal to or smaller than a prescribed failure regenerative electric power limit value upon the failure of said DC-to-DC converter.
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Accused Products
Abstract
An electric system has a fuel cell and an electric storage device which are connected in parallel to each other with respect to a propulsive motor, and a DC-to-DC converter connected closer to the electric storage device than a junction where the fuel cell and the electric storage device are connected in parallel to each other. An electric power control system includes a power supply controller having a failure detector for detecting a failure of the DC-to-DC converter. When the failure detector detects a failure of the DC-to-DC converter, the response of electric power output from the fuel cell is limited.
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Citations
9 Claims
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1. A fuel cell vehicle for being propelled by a propulsive motor, said fuel cell vehicle having an electric system in which a fuel cell and an electric storage device are connected in parallel to each other with respect to the propulsive motor and connected to the propulsive motor through a power converter, comprising:
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a DC-to-DC converter connected closer to the electric storage device than a junction where the fuel cell and the electric storage device are connected in parallel to each other; reactive gas supply means for supplying a reactive gas to said fuel cell; failure detecting means for detecting a failure of said DC-to-DC converter; response limiting means for limiting the response of electric power output from said fuel cell when said failure detecting means detects a failure of said DC-to-DC converter; and regenerative electric power limiting means for limiting regenerative electric power of said propulsive motor to a value equal to or smaller than a prescribed failure regenerative electric power limit value upon the failure of said DC-to-DC converter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fuel cell vehicle for being propelled by a propulsive motor, said fuel cell vehicle having an electric system in which a fuel cell and an electric storage device are connected in parallel to each other with respect to the propulsive motor and connected to the propulsive motor through a power converter, comprising:
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a DC-to-DC converter connected closer to the electric storage device than a junction where the fuel cell and the electric storage device are connected in parallel to each other; reactive gas supply means for supplying a reactive gas to said fuel cell; failure detecting means for detecting a failure of said DC-to-DC converter; protection control means for protecting said fuel cell when said failure detecting means detects a failure of said DC-to-DC converter; and regenerative electric power limiting means for limiting regenerative electric power of said propulsive motor to a value equal to or smaller than a prescribed failure regenerative electric power limit value upon the failure of said DC-to-DC converter. - View Dependent Claims (9)
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Specification