Patent ID: 7570025
Filing Date: 2009-08-04
Classification: G01R,H02J

Abstract:
1. A battery pack monitoring apparatus comprising: a bare cell adapted to be charged or discharged with a voltage; a voltage sensor adapted to sense a charging voltage or a discharging voltage of the bare cell and output a sensed charging voltage or a sensed discharging voltage as a first electrical signal; a current sensor adapted to sense a charging current or a discharging current of the bare cell and output a sensed charging current or a sensed discharging current as a second electrical signal; a charging switch and a discharging switch coupled between the bare cell and an external terminal; a switch temperature sensor near the charging switch and the discharging switch, the switch temperature sensor adapted to sense a temperature of the charging switch or the discharging switch, and convert the sensed temperature into a third electrical signal; a control unit adapted to convert the first electrical signal, the second electrical signal, and the third electrical signal into a respective first digital signal, second digital signal and a third digital signal, operate and process the first digital signal, the second digital signal and the third digital signal in accordance with a control command, and calculate a battery capacity with reference to the first electrical signal, the second electrical signal and the third electrical signal; and a data storage unit adapted to store sensed charging voltage data or sensed discharging voltage data, sensed charging current data or sensed discharging current data, sensed temperature data of the charging switch or the discharging switch and calculated battery capacity data of the bare cell processed by the control unit.