Power supply device
First Claim
1. A power supply device, comprising:
- a first lead terminal and a second lead terminal for connection with a load;
a fuel cell;
an energy storage element connected between the first and second lead terminals;
a synchronous-rectification switching power-source portion for converting an output voltage of the fuel cell to an output voltage of the energy storage element and output it to the first and second lead terminals; and
a current-detecting portion for detecting an output current of the fuel cell,wherein the switching power-source portion includes;
a first switching element connected to the energy storage element in series;
a second switching element connected to the energy storage element in parallel; and
a controller for executing a simultaneous-turn-off control of turning off the first and second switching elements simultaneously when an output current detected by the current-detecting portion is not larger than a preset current threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
A power supply device, comprising first and second lead terminals for connection with a load, a fuel cell, an energy storage element connected between the first and second lead terminals, a synchronous-rectification switching power-source portion for converting the output voltage of the fuel cell to the output voltage of the energy storage element and outputting it to the first and second lead terminals, and a current-detecting portion for detecting the output current of the fuel cell, the switching power-source portion further comprising a first switching element connected to the energy storage element in series, a second switching element connected to the energy storage element in parallel, and a simultaneous-turn-off controller for turning off the first and second switching elements simultaneously when the output current detected by the current-detecting portion is not larger than a preset current threshold.
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Citations
7 Claims
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1. A power supply device, comprising:
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a first lead terminal and a second lead terminal for connection with a load; a fuel cell; an energy storage element connected between the first and second lead terminals; a synchronous-rectification switching power-source portion for converting an output voltage of the fuel cell to an output voltage of the energy storage element and output it to the first and second lead terminals; and a current-detecting portion for detecting an output current of the fuel cell, wherein the switching power-source portion includes; a first switching element connected to the energy storage element in series; a second switching element connected to the energy storage element in parallel; and a controller for executing a simultaneous-turn-off control of turning off the first and second switching elements simultaneously when an output current detected by the current-detecting portion is not larger than a preset current threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power supply device, comprising:
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a first terminal and a second lead terminal for connection with a load; a fuel cell; an energy storage element connected between the first and second lead terminals; a synchronous-rectification switching power-source portion for converting an output voltage of the fuel cell to an output voltage of the energy storage element and outputting it to the first and second lead terminals; a current-detecting portion for detecting an output current of the fuel cell; and a voltage-detecting portion for detecting an output voltage of the fuel cell, wherein the switching power-source portion includes; a first switching element connected to the energy storage element in series, a second switching element connected to the energy storage element in parallel, and a controller for executing a simultaneous-turn-off control of turning the first and second switching elements off simultaneously when the output current detected by the current-detecting portion is not larger than a preset current threshold, and executing adjustment of adjusting the current flowing from the fuel cell to the switching power-source portion by controlling the duty ratio of turning the first and second switching elements on and off alternately to keep the output voltage of the fuel cell at a set output voltage, and suspends the simultaneous-turn-off control for a preset period when the voltage detected by the voltage-detecting portion is larger than a preset voltage threshold, and executes the voltage-converting operation by the switching power-source portion by turning the first and second switching elements on and off alternately.
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Specification