POWER SUPPLY DEVICE, MOBILE DEVICE ARRANGED BY USE THEREOF, AND BATTERY-TYPE ELECTRIC VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a superior power supply device which is high in safety and longer in battery life and which can be charged at high speed.SOLUTION: A power supply device comprises: a conductive polymer type battery 1; a high-capacity density type lithium ion secondary battery 2; SOC detectors 3 and 4 for detecting the battery residual of each of the batteries 1 and 2; a controller 5; and a power output part for outputting power to a load 8. The charging from an external power source is performed on the conductive polymer type battery 1 preferentially. The power output to the power output part is performed from the high-capacity density type lithium ion secondary battery 2 preferentially. The high-capacity density type lithium ion secondary battery 2 is charged by the conductive polymer type battery 1.