| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a charging type power supply device that can drive an electric apparatus for a long time, and can prevent the lowering of a voltage even if a large current flows into the electric apparatus. <P>SOLUTION: The charging type power supply device 1 comprises a main power supply secondary battery 2, a backup secondary battery 3 that can discharge a large current, and a control means connected to these secondary batteries. The control means has a function that detects that a voltage of the main power supply secondary battery has been lowered to a reference voltage or lower when discharging electricity to the electric apparatus from the main power supply secondary battery, and discharges electricity to the electric apparatus by switching the main power supply secondary battery to the backup secondary battery on the basis of the detection result. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
