Electric system for fuel cell, fuel cell vehicle, and method of supplying electric power
First Claim
1. An electric system for a fuel cell in which the fuel cell and an electric storage device are connected in parallel to each other with respect to a load, 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;
failure detecting means for detecting a failure of said DC-to-DC converter; and
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.
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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.
21 Citations
19 Claims
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1. An electric system for a fuel cell in which the fuel cell and an electric storage device are connected in parallel to each other with respect to a load, 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;
failure detecting means for detecting a failure of said DC-to-DC converter; and
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. - View Dependent Claims (2)
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3. 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; and
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. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. 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; and
protection control means for protecting said fuel cell when said failure detecting means detects a failure of said DC-to-DC converter.
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12. A method of supplying electric power in 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, and a DC-to-DC converter is 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, comprising the steps of:
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(a) supplying a reactive gas to said fuel cell;
(b) detecting a failure of said DC-to-DC converter; and
(c) limiting the response of electric power output from said fuel cell when a failure of said DC-to-DC converter is detected in said detecting step (b). - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification