| 摘要 |
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.
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