Patent ID: 9118200
Filing Date: 2015-08-25
Classification: H02J

Abstract:
1. A secondary battery pack system, intended for supplying power to an electronic device, comprising: a plurality of battery packs and corresponding battery pack controllers; a main body side connection circuit, provided on an electronic device side, and connected to the plurality of battery packs; and a main body side discharge control signal line, provided in the main body side connection circuit, wherein the main body side discharge control signal line and the battery pack controllers are connected to each other in parallel, a battery connection signal, for recognizing a connection of the battery pack, is input to one of the battery pack controllers, and a discharge control signal input from the main body side discharge control signal line is pulled up by a pull-up resistor and is distributed as distributed signals into two lines, and one of the distributed signals is input to the one of the battery pack controllers via a resistor and another of the distributed signals is directly input to the one of the battery pack controllers, and among the plurality of battery packs, the discharge control signal, of a battery pack, of the plurality of battery packs, that is discharging its energy, sets a N-ch open drain output port, at the one of the battery pack controllers, to a low state to thereby notify the other battery packs of information indicating that discharging is being performed.