Dc power source with fuel cell
First Claim
Patent Images
1. A direct current power source comprising:
- a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, wherein a ratio of a maximum output of the fuel cell to a maximum total output of the fuel cell and the electric power storage device is in a range of equal to or greater than 0.4 and equal to or less than 0.8.
2 Assignments
0 Petitions
Accused Products
Abstract
A power source system (1) includes a fuel cell (40) and a battery (20) connected in parallel. A DC-DC converter (30) is connected to the battery (20) side. A maximum output ratio of the fuel cell (40) and the battery (20) is set in a range in which the output of the fuel cell falls within 65 to 80% of the total output. Accordingly, electric power loss due to the DC-DC converter (30) is controlled, whereby a high energy efficiency can be achieved.
-
Citations
19 Claims
-
1. A direct current power source comprising:
-
a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, wherein a ratio of a maximum output of the fuel cell to a maximum total output of the fuel cell and the electric power storage device is in a range of equal to or greater than 0.4 and equal to or less than 0.8. - View Dependent Claims (2, 3, 7, 8, 9)
-
-
4. A direct current power source comprising:
-
a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, wherein a maximum output of the fuel cell is equal to or greater than a target value of an electric power to be output from the terminals continuously for a predetermined period. - View Dependent Claims (5)
-
-
6. A direct current power source comprising:
-
a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, wherein a capacity of the electric power storage device is equal to or greater than a maximum value of an electric power input to the terminals.
-
-
10. A vehicle having a motor as a power source, comprising:
-
a direct current power source that supplies electric power to the motor; and
a drive circuit that drives the motor by the electric power, wherein the direct current power source comprises a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, and wherein a ratio of a maximum output of the fuel cell to a maximum total output of the fuel cell and the electric power storage device is in a range equal to or greater than 0.4 and equal to or less than 0.8. - View Dependent Claims (11, 12, 16, 17, 18)
-
-
13. A vehicle having a motor as a power source, comprising:
-
a direct current power source that supplies electric power to the motor; and
a drive circuit that drives the motor by the electric power, wherein the direct current power source comprises a pair of terminals that output electric power;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, and wherein a maximum output of the fuel cell is equal to or greater than a required electric power during cruising of the vehicle. - View Dependent Claims (14)
-
-
15. A vehicle having a motor as a power source, comprising:
-
a drive circuit that regeneratively operates the motor; and
a direct current power source capable of storing electricity regenerated by the motor, wherein the direct current power source comprises a pair of terminals to which electric power is input and from which electric power is output;
a fuel cell connected to the terminals; and
an electric power storage device connected to the terminals in parallel with the fuel cell, and wherein a capacity of the electric power storage device is equal to or greater than a maximum value of an electric power regenerated by the motor.
-
-
19. A method for designing a direct current power source in which a fuel cell and an electric power storage device are connected in parallel, wherein outputs of the fuel cell and the electric power storage device are set taking into account at least one of:
-
a condition under which a maximum total output of the fuel cell and the electric power storage device becomes equal to or greater than a maximum required electric power required for the direct current power source;
a condition under which a ratio of the maximum output of the fuel cell to the maximum total output of the fuel cell and the electric power storage device becomes equal to or greater than 0.4 and equal to or less than 0.8;
a condition under which the maximum output of the fuel cell becomes equal to or greater than a target value of an electric power to be continuously output for a predetermined period; and
a condition under which a capacity of the electric power storage device becomes equal to or greater than a Maximum electric power input to the direct current power source from an external device.
-
Specification