CONTROLLING POLARITY IN AN ACTIVE BALANCING SYSTEM FOR A BATTERY

摘要

A device includes a transformer, a controller, and a switch coupled between the transformer and the controller. The transformer has a primary coil and a secondary coil. The controller receives an indication of a metric of a cell of a battery. In response to the indication, the controller outputs a signal to select a polarity of a balancing current for balancing the cell. The switch receives the signal from the controller. In response to the signal, the switch causes the transformer to generate a primary current of a selected polarity through the primary coil. The transformer generates the balancing current through the secondary coil by inductively coupling the primary coil to the secondary coil. The transformer outputs the balancing current having the polarity for balancing the cell.

主权项

1. A device, comprising:
a transformer having a primary coil and a secondary coil; a controller for: receiving an indication of a metric of a cell of a battery; and, in response thereto, outputting at least one signal to select a polarity of a balancing current for balancing the cell; and at least one switch, coupled between the transformer and the controller, for: receiving the at least one signal from the controller; and, in response thereto, causing the transformer to generate a primary current having the selected polarity through the primary coil; wherein the transformer is for: generating the balancing current through the secondary coil by inductively coupling the primary coil to the secondary coil; and outputting the balancing current having the selected polarity for balancing the cell.