Ablic Inc.

Shinya Fukuchi

Kazuaki Sano

Yasuhiro Miyamoto

Keiichi Murakawa

A charge/discharge control circuit includes: an output terminal from which a cell-balance control signal is sent to each of the first and the second cell balance circuits; the first and the second voltage detection circuits; a control circuit configured to send the first and the second control signals in accordance with a detection signal received from at least one of the first and the second voltage detection circuits; and an output circuit configured to select one of a voltage of a power supply terminal, a voltage of an input terminal connected to each of a negative electrode of a first battery and a positive electrode of a second battery, and a voltage of a ground terminal in accordance with the first and second control signals, and send the selected voltage to the output terminal.

Charge/discharge control circuit and battery device having the same

A charge-discharge control circuit includes a first cell balancing circuit having a first switch; a second cell balancing circuit having a second switch; a first cell balance detection circuit having a third switch; a second cell balance detection circuit having a fourth switch; and a control circuit which outputs a control signal to turn on the first switch in a prescribed cycle according to the voltage of a first battery which is higher than or equal to a cell balance detection voltage, or outputs a control signal to turn on the second switch in the prescribed cycle according to the voltage of a second battery which is higher than or equal to the cell balance detection voltage, and outputs a control signal to turn off the third switch and the fourth switch in the prescribed cycle during output of the control signal.

Charge-discharge control circuit including cell balancing circuits, cell balance detection circuits, overcharge detection circuits, and a control circuit

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Tokyo, Japan

Shinya Fukuchi