DC power source
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorAtsushi Kurosawa
Life of this patent
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Abstract
A DC power source includes one or more insulation type DC-DC converters and a plurality of cells, and is capable of reducing an amount of power loss at an insulation type DC-DC converter. The DC power source includes a pair of terminals for outputting electric power, a fuel cell and a secondary cell connected in parallel to the pair of terminals. An insulation type DC-DC converter is connected in series to either one of the fuel cell or the secondary cell.
Claims22
A DC power source comprising:
- a pair of terminals for outputting electric power;
- a first cell and a second cell connected in parallel to the pair of terminals;
- and
- an insulation type DC-DC converter connected in series to either one of the first cell or the second cell.
A DC power source, comprising:
- a pair of terminals for outputting electric power;
- a fuel cell;
- a secondary cell;
- an engine-driven type generator, the fuel cell, secondary cell and engine-driven type generator connected in parallel to the pair of terminals;
- and
- at least one insulation type DC-DC converter, each insulation type DC-DC converter individually connected in series to one of the fuel cell, the secondary cell and the engine driven type generator.
A DC power source, comprising:
- a pair of terminals for outputting electric power;
- a first cell and a second cell connected in parallel to the pair of terminals;
- and
- at least one insulation type DC-DC converter, each insulation type DC-DC converter connected to one of the first cell and the second cell;
- and
- means for reducing power loss at the at least one insulation-type DC-DC converter.
A method for operating a DC power source connected to a drive unit for a vehicle, comprising:
- receiving a signal from an accelerator of the vehicle;
- receiving a signal from a sensor configured to detect a rotational speed of the drive unit of the vehicle;
- controlling the operation of a DC-DC converter at least in part in response to said received signals to vary the voltage of the DC-DC converter;
- decreasing a voltage of a fuel cell of the vehicle if a current flowing through the fuel cell is above a predetermined value;
- and
- varying the voltage of the DC-DC converter to supplement the decrease in voltage in the fuel cell.
Dependencies are inferred from the claim text.