| 主权项 |
1. An energy storage device comprising at least one energy input interface and at least one energy output interface, wherein said energy storage device receives energy using said at least one energy input interface or charges an electronic device using said at least one energy output interface, said energy storage device comprising:
an adapter coupled to said at least one energy input interface to provide an input current; an energy storage unit for storing energy or providing energy; and a charger module coupled to said adapter, said energy storage unit and said at least one energy output interface to receive said input current so that said charger module supplies a first current to said energy storage unit to charge said energy storage unit or said charger module supplies said input current to said electronic device to charge said electronic device, wherein said charger module comprises:
a first switch coupled to said adapter, said energy storage unit and said at least one energy output interface; anda second switch coupled to said first switch, said energy storage unit and a ground terminal, wherein said charger module allows a current flowing through said second switch to be smaller than zero; wherein, when said input current provided by said adapter is higher than or equal to a maximum safe current, said charger module controls a duty cycle of said first switch and a duty cycle of said second switch so that said energy storage unit supplies a second current to said charger module and then said charger module operates in a boost mode and outputs energy to said electronic device according to said second current to assist said adapter to charge said electronic device, wherein said duty cycle of said first switch and said duty cycle of said second switch correspond to said first current and said second current, and said second current is reverse to said first current. |
