Circuit for balancing cells

摘要

A cell balancing circuit controlling balanced discharge of a plurality of battery cells, the cell balancing circuit having a balancing part sensing voltages of the battery cells, a controller responsive to an output of the balancing part to select one of the battery cells for discharge of the cell, and a resistance controller controlling discharge of the selected cell. The resistance controller includes at least one discharge circuit connected to the battery cells; and a plurality of resistors connected to output signal channels of the discharge circuit, the resistors being selectively connected in series according to a control signal of the controller to discharge the selected cell.

主权项

1. A cell balancing circuit, comprising:
a plurality of battery cells; a balancing part sensing voltages of the battery cells, and comparing the sensed voltages; a controller responsive to output signals of the balancing part to control selection of one of the battery cells to balance the discharge of the plurality of battery cells; and a plurality of resistance controllers, each resistance controller separately controlling discharge of a corresponding one of the battery cells, each resistance controller comprising:
a discharge circuit connected to the battery cell; anda plurality of resistors connected to output signal channels of the discharge circuit, the resistors being selectively connected in series with each other according to a control signal of the controller to discharge the battery cell.