Patent ID: 8970163
Filing Date: 2015-03-03
Classification: H02J

Abstract:
1. A battery charge control system, the system comprising: a charge unit configured to charge a battery, the charge unit being connected to a high current path between the battery and charge/discharge terminals of the battery; a battery management unit including a first port and a second port, and configured to determine a mode of the battery according to a status of the charge unit whether the charge unit is operating normally or is disabled, the mode including a charge mode and a charge stop mode, and to control outputs of the first port and the second port by selectively turning on or turning off the outputs of the first port and the second port based on the determination; and a voltage level shift unit configured to shift a voltage level of a data input terminal of a charger connected to a charger management unit according to the outputs of the first port and the second port, wherein: the data input terminal includes a first input terminal and a second input terminal, the first input terminal and second input terminal corresponding to the first port and the second port, and the voltage level shift unit includes: a first resistor including a first terminal connected to the first input terminal; a first transistor including a first terminal connected to a second terminal of the first resistor, a second terminal connected to the second input terminal, and a control terminal connected to the first port; a second resistor including a first terminal connected to the second terminal of the first resistor; a second transistor including a first terminal connected to a second terminal of the second resistor, a second terminal connected to the second input terminal, and a control terminal connected to the second port; and a third resistor including a first terminal connected to the second terminal of the first resistor and a second terminal connected to the second input terminal.