Power supply device using secondary battery and method of switching the battery mode

摘要: The present invention employs more than two secondary batteries; most output of one battery is supplied to load, and rest used charge another for improving the efficiency prolong usable time (discharge time). object provide a power supplying device mode switching method by using cells. According batteries that; if either sets discharging mode, including an inverter delivering DC voltage battery, which in when discharged; relay performing operation connecting other different inverter, at point, discharge connected inverter; controlling unit alternately supping or load via alters charging anode (+) cathode (−) each terminal, mutually fixedly connected, moveable terminal switched control mode.