| 摘要 |
<p>A power supply device for electric power tool is provided with: an adapter configured to be electrically connected to an electric power tool; a fuel cell configured to generate an electric power to be supplied to the electric power tool through the adapter, by causing an oxidation reaction between a fuel and an oxidant; and a charge unit configured to supply the electric power generated in the fuel cell to charge a rechargeable battery which is to be connected to the electric power tool to supply the electric power to the electric power tool. The adapter can be detached from the electric power tool. Based on a connection determination unit configured to determine whether or not the adapter is connected to the electric power tool, the charge unit implements a first charging mode when the adapter is not connected to the electric power tool, and implements a second charging mode that performs charging with a lower voltage and a lower current than those of the first charging mode when the adapter is connected to the electric power tool.</p> |
