| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery pack which can operate a portable terminal unit continuously for a long time and can sharply reduce a charging time remarkably. <P>SOLUTION: The battery pack which can be installed exchangeable with an original battery pack housed beforehand in the portable terminal unit and used as a power source for the portable terminal unit is provided with a main secondary battery of a same kind housed in an original battery pack, an auxiliary secondary battery which can be charged up to 80% of a capacity within 3 minutes, a first charging controlling circuit which is controlled by a first microcomputer and is composed of a current controlling circuit which supplies a generated power by the auxiliary secondary battery and controls the generated power below a current of a predetermined value and outputs to the main secondary battery and a voltage raising circuit to raise a voltage level of the generated power of the auxiliary secondary battery from the current controlling circuit up to a voltage level of the main secondary battery, and a supplying circuit to supply a stored power which is charged to the main secondary battery in the first charging controlling circuit to the portable terminal unit. <P>COPYRIGHT: (C)2007,JPO&INPIT |
